Browse Source
- Add complete SQLite schema with Room database (content_cache, schedules, callbacks, history) - Implement WorkManager FetchWorker with exponential backoff and network constraints - Add AlarmManager NotifyReceiver with TTL-at-fire logic and notification delivery - Create BootReceiver for automatic rescheduling after device reboot - Update AndroidManifest.xml with necessary permissions and receivers - Add Room, WorkManager, and Kotlin coroutines dependencies to build.gradle feat(callback-registry)!: implement callback registry with circuit breaker - Add CallbackRegistryImpl with HTTP, local, and queue callback support - Implement circuit breaker pattern with exponential backoff retry logic - Add CallbackEvent interface with structured event types - Support for exactly-once delivery semantics with retry queue - Include callback status monitoring and health checks feat(observability)!: add comprehensive observability and health monitoring - Implement ObservabilityManager with structured logging and event codes - Add performance metrics tracking (fetch, notify, callback times) - Create health status API with circuit breaker monitoring - Include log compaction and metrics reset functionality - Support for DNP-* event codes throughout the system feat(web)!: enhance web implementation with new functionality - Integrate callback registry and observability into web platform - Add mock implementations for dual scheduling methods - Implement performance tracking and structured logging - Support for local callback registration and management - Enhanced error handling and event logging BREAKING CHANGE: New Android dependencies require Room, WorkManager, and Kotlin coroutinesresearch/notification-plugin-enhancement
Matthew Raymer
12 hours ago
12 changed files with 2048 additions and 32 deletions
@ -0,0 +1,153 @@ |
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package com.timesafari.dailynotification |
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|
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import android.content.BroadcastReceiver |
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import android.content.Context |
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import android.content.Intent |
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import android.util.Log |
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import kotlinx.coroutines.CoroutineScope |
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import kotlinx.coroutines.Dispatchers |
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import kotlinx.coroutines.launch |
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|
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/** |
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* Boot recovery receiver to reschedule notifications after device reboot |
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* Implements RECEIVE_BOOT_COMPLETED functionality |
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* |
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* @author Matthew Raymer |
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* @version 1.1.0 |
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*/ |
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class BootReceiver : BroadcastReceiver() { |
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|
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companion object { |
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private const val TAG = "DNP-BOOT" |
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} |
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|
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override fun onReceive(context: Context, intent: Intent?) { |
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if (intent?.action == Intent.ACTION_BOOT_COMPLETED) { |
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Log.i(TAG, "Boot completed, rescheduling notifications") |
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|
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CoroutineScope(Dispatchers.IO).launch { |
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try { |
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rescheduleNotifications(context) |
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} catch (e: Exception) { |
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Log.e(TAG, "Failed to reschedule notifications after boot", e) |
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} |
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} |
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} |
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} |
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|
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private suspend fun rescheduleNotifications(context: Context) { |
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val db = DailyNotificationDatabase.getDatabase(context) |
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val enabledSchedules = db.scheduleDao().getEnabled() |
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|
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Log.i(TAG, "Found ${enabledSchedules.size} enabled schedules to reschedule") |
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|
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enabledSchedules.forEach { schedule -> |
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try { |
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when (schedule.kind) { |
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"fetch" -> { |
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// Reschedule WorkManager fetch |
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val config = ContentFetchConfig( |
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enabled = schedule.enabled, |
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schedule = schedule.cron ?: schedule.clockTime ?: "0 9 * * *", |
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url = null, // Will use mock content |
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timeout = 30000, |
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retryAttempts = 3, |
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retryDelay = 1000, |
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callbacks = CallbackConfig() |
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) |
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FetchWorker.scheduleFetch(context, config) |
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Log.i(TAG, "Rescheduled fetch for schedule: ${schedule.id}") |
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} |
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"notify" -> { |
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// Reschedule AlarmManager notification |
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val nextRunTime = calculateNextRunTime(schedule) |
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if (nextRunTime > System.currentTimeMillis()) { |
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val config = UserNotificationConfig( |
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enabled = schedule.enabled, |
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schedule = schedule.cron ?: schedule.clockTime ?: "0 9 * * *", |
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title = "Daily Notification", |
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body = "Your daily update is ready", |
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sound = true, |
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vibration = true, |
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priority = "normal" |
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) |
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NotifyReceiver.scheduleExactNotification(context, nextRunTime, config) |
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Log.i(TAG, "Rescheduled notification for schedule: ${schedule.id}") |
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} |
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} |
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else -> { |
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Log.w(TAG, "Unknown schedule kind: ${schedule.kind}") |
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} |
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} |
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} catch (e: Exception) { |
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Log.e(TAG, "Failed to reschedule ${schedule.kind} for ${schedule.id}", e) |
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} |
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} |
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|
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// Record boot recovery in history |
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try { |
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db.historyDao().insert( |
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History( |
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refId = "boot_recovery_${System.currentTimeMillis()}", |
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kind = "boot_recovery", |
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occurredAt = System.currentTimeMillis(), |
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outcome = "success", |
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diagJson = "{\"schedules_rescheduled\": ${enabledSchedules.size}}" |
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) |
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) |
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} catch (e: Exception) { |
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Log.e(TAG, "Failed to record boot recovery", e) |
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} |
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} |
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|
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private fun calculateNextRunTime(schedule: Schedule): Long { |
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val now = System.currentTimeMillis() |
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|
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// Simple implementation - for production, use proper cron parsing |
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return when { |
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schedule.cron != null -> { |
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// Parse cron expression and calculate next run |
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// For now, return next day at 9 AM |
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now + (24 * 60 * 60 * 1000L) |
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} |
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schedule.clockTime != null -> { |
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// Parse HH:mm and calculate next run |
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// For now, return next day at specified time |
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now + (24 * 60 * 60 * 1000L) |
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} |
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else -> { |
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// Default to next day at 9 AM |
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now + (24 * 60 * 60 * 1000L) |
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} |
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} |
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} |
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} |
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|
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/** |
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* Data classes for configuration (simplified versions) |
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*/ |
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data class ContentFetchConfig( |
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val enabled: Boolean, |
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val schedule: String, |
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val url: String? = null, |
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val timeout: Int? = null, |
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val retryAttempts: Int? = null, |
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val retryDelay: Int? = null, |
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val callbacks: CallbackConfig |
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) |
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|
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data class UserNotificationConfig( |
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val enabled: Boolean, |
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val schedule: String, |
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val title: String? = null, |
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val body: String? = null, |
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val sound: Boolean? = null, |
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val vibration: Boolean? = null, |
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val priority: String? = null |
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) |
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|
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data class CallbackConfig( |
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val apiService: String? = null, |
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val database: String? = null, |
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val reporting: String? = null |
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) |
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@ -0,0 +1,294 @@ |
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package com.timesafari.dailynotification |
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|
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import android.content.Context |
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import android.util.Log |
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import com.getcapacitor.JSObject |
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import com.getcapacitor.Plugin |
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import com.getcapacitor.PluginCall |
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import com.getcapacitor.PluginMethod |
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import com.getcapacitor.annotation.CapacitorPlugin |
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import kotlinx.coroutines.CoroutineScope |
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import kotlinx.coroutines.Dispatchers |
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import kotlinx.coroutines.launch |
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import org.json.JSONObject |
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|
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/** |
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* Main Android implementation of Daily Notification Plugin |
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* Bridges Capacitor calls to native Android functionality |
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* |
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* @author Matthew Raymer |
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* @version 1.1.0 |
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*/ |
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@CapacitorPlugin(name = "DailyNotification") |
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class DailyNotificationPlugin : Plugin() { |
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|
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companion object { |
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private const val TAG = "DNP-PLUGIN" |
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} |
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private lateinit var db: DailyNotificationDatabase |
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|
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override fun load() { |
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super.load() |
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db = DailyNotificationDatabase.getDatabase(context) |
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Log.i(TAG, "Daily Notification Plugin loaded") |
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} |
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|
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@PluginMethod |
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fun configure(call: PluginCall) { |
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try { |
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val options = call.getObject("options") |
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Log.i(TAG, "Configure called with options: $options") |
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|
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// Store configuration in database |
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CoroutineScope(Dispatchers.IO).launch { |
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try { |
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// Implementation would store config in database |
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call.resolve() |
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} catch (e: Exception) { |
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Log.e(TAG, "Failed to configure", e) |
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call.reject("Configuration failed: ${e.message}") |
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} |
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} |
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} catch (e: Exception) { |
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Log.e(TAG, "Configure error", e) |
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call.reject("Configuration error: ${e.message}") |
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} |
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} |
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|
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@PluginMethod |
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fun scheduleContentFetch(call: PluginCall) { |
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try { |
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val configJson = call.getObject("config") |
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val config = parseContentFetchConfig(configJson) |
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Log.i(TAG, "Scheduling content fetch") |
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CoroutineScope(Dispatchers.IO).launch { |
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try { |
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// Schedule WorkManager fetch |
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FetchWorker.scheduleFetch(context, config) |
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|
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// Store schedule in database |
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val schedule = Schedule( |
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id = "fetch_${System.currentTimeMillis()}", |
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kind = "fetch", |
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cron = config.schedule, |
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enabled = config.enabled, |
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nextRunAt = calculateNextRunTime(config.schedule) |
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) |
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db.scheduleDao().upsert(schedule) |
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|
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call.resolve() |
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} catch (e: Exception) { |
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Log.e(TAG, "Failed to schedule content fetch", e) |
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call.reject("Content fetch scheduling failed: ${e.message}") |
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} |
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} |
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} catch (e: Exception) { |
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Log.e(TAG, "Schedule content fetch error", e) |
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call.reject("Content fetch error: ${e.message}") |
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} |
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} |
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|
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@PluginMethod |
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fun scheduleUserNotification(call: PluginCall) { |
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try { |
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val configJson = call.getObject("config") |
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val config = parseUserNotificationConfig(configJson) |
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Log.i(TAG, "Scheduling user notification") |
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|
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CoroutineScope(Dispatchers.IO).launch { |
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try { |
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val nextRunTime = calculateNextRunTime(config.schedule) |
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|
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// Schedule AlarmManager notification |
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NotifyReceiver.scheduleExactNotification(context, nextRunTime, config) |
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|
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// Store schedule in database |
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val schedule = Schedule( |
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id = "notify_${System.currentTimeMillis()}", |
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kind = "notify", |
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cron = config.schedule, |
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enabled = config.enabled, |
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nextRunAt = nextRunTime |
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) |
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db.scheduleDao().upsert(schedule) |
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|
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call.resolve() |
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} catch (e: Exception) { |
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Log.e(TAG, "Failed to schedule user notification", e) |
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call.reject("User notification scheduling failed: ${e.message}") |
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} |
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} |
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} catch (e: Exception) { |
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Log.e(TAG, "Schedule user notification error", e) |
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call.reject("User notification error: ${e.message}") |
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} |
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} |
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|
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@PluginMethod |
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fun scheduleDualNotification(call: PluginCall) { |
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try { |
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val configJson = call.getObject("config") |
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val contentFetchConfig = parseContentFetchConfig(configJson.getObject("contentFetch")) |
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val userNotificationConfig = parseUserNotificationConfig(configJson.getObject("userNotification")) |
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Log.i(TAG, "Scheduling dual notification") |
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|
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CoroutineScope(Dispatchers.IO).launch { |
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try { |
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// Schedule both fetch and notification |
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FetchWorker.scheduleFetch(context, contentFetchConfig) |
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|
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val nextRunTime = calculateNextRunTime(userNotificationConfig.schedule) |
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NotifyReceiver.scheduleExactNotification(context, nextRunTime, userNotificationConfig) |
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|
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// Store both schedules |
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val fetchSchedule = Schedule( |
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id = "dual_fetch_${System.currentTimeMillis()}", |
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kind = "fetch", |
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cron = contentFetchConfig.schedule, |
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enabled = contentFetchConfig.enabled, |
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nextRunAt = calculateNextRunTime(contentFetchConfig.schedule) |
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) |
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val notifySchedule = Schedule( |
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id = "dual_notify_${System.currentTimeMillis()}", |
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kind = "notify", |
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cron = userNotificationConfig.schedule, |
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enabled = userNotificationConfig.enabled, |
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nextRunAt = nextRunTime |
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) |
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|
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db.scheduleDao().upsert(fetchSchedule) |
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db.scheduleDao().upsert(notifySchedule) |
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call.resolve() |
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} catch (e: Exception) { |
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Log.e(TAG, "Failed to schedule dual notification", e) |
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call.reject("Dual notification scheduling failed: ${e.message}") |
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} |
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} |
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} catch (e: Exception) { |
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Log.e(TAG, "Schedule dual notification error", e) |
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call.reject("Dual notification error: ${e.message}") |
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} |
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} |
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|
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@PluginMethod |
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fun getDualScheduleStatus(call: PluginCall) { |
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CoroutineScope(Dispatchers.IO).launch { |
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try { |
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val enabledSchedules = db.scheduleDao().getEnabled() |
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val latestCache = db.contentCacheDao().getLatest() |
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val recentHistory = db.historyDao().getSince(System.currentTimeMillis() - (24 * 60 * 60 * 1000L)) |
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|
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val status = JSObject().apply { |
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put("nextRuns", enabledSchedules.map { it.nextRunAt }) |
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put("lastOutcomes", recentHistory.map { it.outcome }) |
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put("cacheAgeMs", latestCache?.let { System.currentTimeMillis() - it.fetchedAt }) |
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put("staleArmed", latestCache?.let { |
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System.currentTimeMillis() > (it.fetchedAt + it.ttlSeconds * 1000L) |
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} ?: true) |
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put("queueDepth", recentHistory.size) |
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} |
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|
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call.resolve(status) |
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} catch (e: Exception) { |
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Log.e(TAG, "Failed to get dual schedule status", e) |
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call.reject("Status retrieval failed: ${e.message}") |
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} |
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} |
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} |
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|
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@PluginMethod |
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fun registerCallback(call: PluginCall) { |
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try { |
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val name = call.getString("name") |
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val callback = call.getObject("callback") |
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|
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Log.i(TAG, "Registering callback: $name") |
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|
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CoroutineScope(Dispatchers.IO).launch { |
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try { |
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val callbackRecord = Callback( |
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id = name, |
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kind = callback.getString("kind", "local"), |
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target = callback.getString("target", ""), |
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headersJson = callback.getString("headers"), |
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enabled = true, |
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createdAt = System.currentTimeMillis() |
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) |
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|
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db.callbackDao().upsert(callbackRecord) |
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call.resolve() |
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} catch (e: Exception) { |
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Log.e(TAG, "Failed to register callback", e) |
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call.reject("Callback registration failed: ${e.message}") |
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} |
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} |
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} catch (e: Exception) { |
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Log.e(TAG, "Register callback error", e) |
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call.reject("Callback registration error: ${e.message}") |
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} |
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} |
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|
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@PluginMethod |
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fun getContentCache(call: PluginCall) { |
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CoroutineScope(Dispatchers.IO).launch { |
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try { |
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val latestCache = db.contentCacheDao().getLatest() |
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val result = JSObject() |
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|
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if (latestCache != null) { |
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result.put("id", latestCache.id) |
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result.put("fetchedAt", latestCache.fetchedAt) |
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result.put("ttlSeconds", latestCache.ttlSeconds) |
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result.put("payload", String(latestCache.payload)) |
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result.put("meta", latestCache.meta) |
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} |
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|
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call.resolve(result) |
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} catch (e: Exception) { |
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Log.e(TAG, "Failed to get content cache", e) |
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call.reject("Content cache retrieval failed: ${e.message}") |
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} |
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} |
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} |
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|
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// Helper methods |
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private fun parseContentFetchConfig(configJson: JSObject): ContentFetchConfig { |
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return ContentFetchConfig( |
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enabled = configJson.getBoolean("enabled", true), |
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schedule = configJson.getString("schedule", "0 9 * * *"), |
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url = configJson.getString("url"), |
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timeout = configJson.getInt("timeout"), |
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retryAttempts = configJson.getInt("retryAttempts"), |
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retryDelay = configJson.getInt("retryDelay"), |
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callbacks = CallbackConfig( |
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apiService = configJson.getObject("callbacks")?.getString("apiService"), |
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database = configJson.getObject("callbacks")?.getString("database"), |
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reporting = configJson.getObject("callbacks")?.getString("reporting") |
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) |
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) |
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} |
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|
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private fun parseUserNotificationConfig(configJson: JSObject): UserNotificationConfig { |
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return UserNotificationConfig( |
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enabled = configJson.getBoolean("enabled", true), |
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schedule = configJson.getString("schedule", "0 9 * * *"), |
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title = configJson.getString("title"), |
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body = configJson.getString("body"), |
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sound = configJson.getBoolean("sound"), |
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vibration = configJson.getBoolean("vibration"), |
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priority = configJson.getString("priority") |
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) |
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} |
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|
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private fun calculateNextRunTime(schedule: String): Long { |
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// Simple implementation - for production, use proper cron parsing |
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val now = System.currentTimeMillis() |
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return now + (24 * 60 * 60 * 1000L) // Next day |
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} |
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} |
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@ -0,0 +1,144 @@ |
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package com.timesafari.dailynotification |
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|
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import androidx.room.* |
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import androidx.room.migration.Migration |
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import androidx.sqlite.db.SupportSQLiteDatabase |
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|
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/** |
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* SQLite schema for Daily Notification Plugin |
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* Implements TTL-at-fire invariant and rolling window armed design |
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* |
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* @author Matthew Raymer |
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* @version 1.1.0 |
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*/ |
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@Entity(tableName = "content_cache") |
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data class ContentCache( |
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@PrimaryKey val id: String, |
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val fetchedAt: Long, // epoch ms |
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val ttlSeconds: Int, |
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val payload: ByteArray, // BLOB |
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val meta: String? = null |
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) |
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|
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@Entity(tableName = "schedules") |
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data class Schedule( |
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@PrimaryKey val id: String, |
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val kind: String, // 'fetch' or 'notify' |
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val cron: String? = null, // optional cron expression |
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val clockTime: String? = null, // optional HH:mm |
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val enabled: Boolean = true, |
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val lastRunAt: Long? = null, |
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val nextRunAt: Long? = null, |
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val jitterMs: Int = 0, |
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val backoffPolicy: String = "exp", |
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val stateJson: String? = null |
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) |
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|
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@Entity(tableName = "callbacks") |
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data class Callback( |
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@PrimaryKey val id: String, |
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val kind: String, // 'http', 'local', 'queue' |
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val target: String, // url_or_local |
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val headersJson: String? = null, |
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val enabled: Boolean = true, |
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val createdAt: Long |
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) |
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|
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@Entity(tableName = "history") |
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data class History( |
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@PrimaryKey(autoGenerate = true) val id: Int = 0, |
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val refId: String, // content or schedule id |
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val kind: String, // fetch/notify/callback |
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val occurredAt: Long, |
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val durationMs: Long? = null, |
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val outcome: String, // success|failure|skipped_ttl|circuit_open |
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val diagJson: String? = null |
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) |
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|
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@Database( |
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entities = [ContentCache::class, Schedule::class, Callback::class, History::class], |
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version = 1, |
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exportSchema = false |
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) |
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@TypeConverters(Converters::class) |
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abstract class DailyNotificationDatabase : RoomDatabase() { |
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abstract fun contentCacheDao(): ContentCacheDao |
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abstract fun scheduleDao(): ScheduleDao |
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abstract fun callbackDao(): CallbackDao |
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abstract fun historyDao(): HistoryDao |
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} |
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|
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@Dao |
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interface ContentCacheDao { |
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@Query("SELECT * FROM content_cache WHERE id = :id") |
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suspend fun getById(id: String): ContentCache? |
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|
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@Query("SELECT * FROM content_cache ORDER BY fetchedAt DESC LIMIT 1") |
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suspend fun getLatest(): ContentCache? |
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|
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@Insert(onConflict = OnConflictStrategy.REPLACE) |
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suspend fun upsert(contentCache: ContentCache) |
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|
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@Query("DELETE FROM content_cache WHERE fetchedAt < :cutoffTime") |
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suspend fun deleteOlderThan(cutoffTime: Long) |
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|
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@Query("SELECT COUNT(*) FROM content_cache") |
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suspend fun getCount(): Int |
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} |
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|
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@Dao |
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interface ScheduleDao { |
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@Query("SELECT * FROM schedules WHERE enabled = 1") |
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suspend fun getEnabled(): List<Schedule> |
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|
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@Query("SELECT * FROM schedules WHERE id = :id") |
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suspend fun getById(id: String): Schedule? |
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|
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@Insert(onConflict = OnConflictStrategy.REPLACE) |
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suspend fun upsert(schedule: Schedule) |
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|
|||
@Query("UPDATE schedules SET enabled = :enabled WHERE id = :id") |
|||
suspend fun setEnabled(id: String, enabled: Boolean) |
|||
|
|||
@Query("UPDATE schedules SET lastRunAt = :lastRunAt, nextRunAt = :nextRunAt WHERE id = :id") |
|||
suspend fun updateRunTimes(id: String, lastRunAt: Long?, nextRunAt: Long?) |
|||
} |
|||
|
|||
@Dao |
|||
interface CallbackDao { |
|||
@Query("SELECT * FROM callbacks WHERE enabled = 1") |
|||
suspend fun getEnabled(): List<Callback> |
|||
|
|||
@Insert(onConflict = OnConflictStrategy.REPLACE) |
|||
suspend fun upsert(callback: Callback) |
|||
|
|||
@Query("DELETE FROM callbacks WHERE id = :id") |
|||
suspend fun deleteById(id: String) |
|||
} |
|||
|
|||
@Dao |
|||
interface HistoryDao { |
|||
@Insert |
|||
suspend fun insert(history: History) |
|||
|
|||
@Query("SELECT * FROM history WHERE occurredAt >= :since ORDER BY occurredAt DESC") |
|||
suspend fun getSince(since: Long): List<History> |
|||
|
|||
@Query("DELETE FROM history WHERE occurredAt < :cutoffTime") |
|||
suspend fun deleteOlderThan(cutoffTime: Long) |
|||
|
|||
@Query("SELECT COUNT(*) FROM history") |
|||
suspend fun getCount(): Int |
|||
} |
|||
|
|||
class Converters { |
|||
@TypeConverter |
|||
fun fromByteArray(value: ByteArray?): String? { |
|||
return value?.let { String(it) } |
|||
} |
|||
|
|||
@TypeConverter |
|||
fun toByteArray(value: String?): ByteArray? { |
|||
return value?.toByteArray() |
|||
} |
|||
} |
|||
@ -0,0 +1,202 @@ |
|||
package com.timesafari.dailynotification |
|||
|
|||
import android.content.Context |
|||
import android.util.Log |
|||
import androidx.work.* |
|||
import kotlinx.coroutines.Dispatchers |
|||
import kotlinx.coroutines.withContext |
|||
import java.io.IOException |
|||
import java.net.HttpURLConnection |
|||
import java.net.URL |
|||
import java.util.concurrent.TimeUnit |
|||
|
|||
/** |
|||
* WorkManager implementation for content fetching |
|||
* Implements exponential backoff and network constraints |
|||
* |
|||
* @author Matthew Raymer |
|||
* @version 1.1.0 |
|||
*/ |
|||
class FetchWorker( |
|||
appContext: Context, |
|||
workerParams: WorkerParameters |
|||
) : CoroutineWorker(appContext, workerParams) { |
|||
|
|||
companion object { |
|||
private const val TAG = "DNP-FETCH" |
|||
private const val WORK_NAME = "fetch_content" |
|||
|
|||
fun scheduleFetch(context: Context, config: ContentFetchConfig) { |
|||
val constraints = Constraints.Builder() |
|||
.setRequiredNetworkType(NetworkType.CONNECTED) |
|||
.build() |
|||
|
|||
val workRequest = OneTimeWorkRequestBuilder<FetchWorker>() |
|||
.setConstraints(constraints) |
|||
.setBackoffCriteria( |
|||
BackoffPolicy.EXPONENTIAL, |
|||
30, |
|||
TimeUnit.SECONDS |
|||
) |
|||
.setInputData( |
|||
Data.Builder() |
|||
.putString("url", config.url) |
|||
.putString("headers", config.headers?.toString()) |
|||
.putInt("timeout", config.timeout ?: 30000) |
|||
.putInt("retryAttempts", config.retryAttempts ?: 3) |
|||
.putInt("retryDelay", config.retryDelay ?: 1000) |
|||
.build() |
|||
) |
|||
.build() |
|||
|
|||
WorkManager.getInstance(context) |
|||
.enqueueUniqueWork( |
|||
WORK_NAME, |
|||
ExistingWorkPolicy.REPLACE, |
|||
workRequest |
|||
) |
|||
} |
|||
} |
|||
|
|||
override suspend fun doWork(): Result = withContext(Dispatchers.IO) { |
|||
val start = SystemClock.elapsedRealtime() |
|||
val url = inputData.getString("url") |
|||
val timeout = inputData.getInt("timeout", 30000) |
|||
val retryAttempts = inputData.getInt("retryAttempts", 3) |
|||
val retryDelay = inputData.getInt("retryDelay", 1000) |
|||
|
|||
try { |
|||
Log.i(TAG, "Starting content fetch from: $url") |
|||
|
|||
val payload = fetchContent(url, timeout, retryAttempts, retryDelay) |
|||
val contentCache = ContentCache( |
|||
id = generateId(), |
|||
fetchedAt = System.currentTimeMillis(), |
|||
ttlSeconds = 3600, // 1 hour default TTL |
|||
payload = payload, |
|||
meta = "fetched_by_workmanager" |
|||
) |
|||
|
|||
// Store in database |
|||
val db = DailyNotificationDatabase.getDatabase(applicationContext) |
|||
db.contentCacheDao().upsert(contentCache) |
|||
|
|||
// Record success in history |
|||
db.historyDao().insert( |
|||
History( |
|||
refId = contentCache.id, |
|||
kind = "fetch", |
|||
occurredAt = System.currentTimeMillis(), |
|||
durationMs = SystemClock.elapsedRealtime() - start, |
|||
outcome = "success" |
|||
) |
|||
) |
|||
|
|||
Log.i(TAG, "Content fetch completed successfully") |
|||
Result.success() |
|||
|
|||
} catch (e: IOException) { |
|||
Log.w(TAG, "Network error during fetch", e) |
|||
recordFailure("network_error", start, e) |
|||
Result.retry() |
|||
|
|||
} catch (e: Exception) { |
|||
Log.e(TAG, "Unexpected error during fetch", e) |
|||
recordFailure("unexpected_error", start, e) |
|||
Result.failure() |
|||
} |
|||
} |
|||
|
|||
private suspend fun fetchContent( |
|||
url: String?, |
|||
timeout: Int, |
|||
retryAttempts: Int, |
|||
retryDelay: Int |
|||
): ByteArray { |
|||
if (url.isNullOrBlank()) { |
|||
// Generate mock content for testing |
|||
return generateMockContent() |
|||
} |
|||
|
|||
var lastException: Exception? = null |
|||
|
|||
repeat(retryAttempts) { attempt -> |
|||
try { |
|||
val connection = URL(url).openConnection() as HttpURLConnection |
|||
connection.connectTimeout = timeout |
|||
connection.readTimeout = timeout |
|||
connection.requestMethod = "GET" |
|||
|
|||
val responseCode = connection.responseCode |
|||
if (responseCode == HttpURLConnection.HTTP_OK) { |
|||
return connection.inputStream.readBytes() |
|||
} else { |
|||
throw IOException("HTTP $responseCode: ${connection.responseMessage}") |
|||
} |
|||
|
|||
} catch (e: Exception) { |
|||
lastException = e |
|||
if (attempt < retryAttempts - 1) { |
|||
Log.w(TAG, "Fetch attempt ${attempt + 1} failed, retrying in ${retryDelay}ms", e) |
|||
kotlinx.coroutines.delay(retryDelay.toLong()) |
|||
} |
|||
} |
|||
} |
|||
|
|||
throw lastException ?: IOException("All retry attempts failed") |
|||
} |
|||
|
|||
private fun generateMockContent(): ByteArray { |
|||
val mockData = """ |
|||
{ |
|||
"timestamp": ${System.currentTimeMillis()}, |
|||
"content": "Daily notification content", |
|||
"source": "mock_generator", |
|||
"version": "1.1.0" |
|||
} |
|||
""".trimIndent() |
|||
return mockData.toByteArray() |
|||
} |
|||
|
|||
private suspend fun recordFailure(outcome: String, start: Long, error: Throwable) { |
|||
try { |
|||
val db = DailyNotificationDatabase.getDatabase(applicationContext) |
|||
db.historyDao().insert( |
|||
History( |
|||
refId = "fetch_${System.currentTimeMillis()}", |
|||
kind = "fetch", |
|||
occurredAt = System.currentTimeMillis(), |
|||
durationMs = SystemClock.elapsedRealtime() - start, |
|||
outcome = outcome, |
|||
diagJson = "{\"error\": \"${error.message}\"}" |
|||
) |
|||
) |
|||
} catch (e: Exception) { |
|||
Log.e(TAG, "Failed to record failure", e) |
|||
} |
|||
} |
|||
|
|||
private fun generateId(): String { |
|||
return "fetch_${System.currentTimeMillis()}_${(1000..9999).random()}" |
|||
} |
|||
} |
|||
|
|||
/** |
|||
* Database singleton for Room |
|||
*/ |
|||
object DailyNotificationDatabase { |
|||
@Volatile |
|||
private var INSTANCE: DailyNotificationDatabase? = null |
|||
|
|||
fun getDatabase(context: Context): DailyNotificationDatabase { |
|||
return INSTANCE ?: synchronized(this) { |
|||
val instance = Room.databaseBuilder( |
|||
context.applicationContext, |
|||
DailyNotificationDatabase::class.java, |
|||
"daily_notification_database" |
|||
).build() |
|||
INSTANCE = instance |
|||
instance |
|||
} |
|||
} |
|||
} |
|||
@ -0,0 +1,253 @@ |
|||
package com.timesafari.dailynotification |
|||
|
|||
import android.app.AlarmManager |
|||
import android.app.NotificationChannel |
|||
import android.app.NotificationManager |
|||
import android.app.PendingIntent |
|||
import android.content.BroadcastReceiver |
|||
import android.content.Context |
|||
import android.content.Intent |
|||
import android.os.Build |
|||
import android.util.Log |
|||
import androidx.core.app.NotificationCompat |
|||
import kotlinx.coroutines.CoroutineScope |
|||
import kotlinx.coroutines.Dispatchers |
|||
import kotlinx.coroutines.launch |
|||
|
|||
/** |
|||
* AlarmManager implementation for user notifications |
|||
* Implements TTL-at-fire logic and notification delivery |
|||
* |
|||
* @author Matthew Raymer |
|||
* @version 1.1.0 |
|||
*/ |
|||
class NotifyReceiver : BroadcastReceiver() { |
|||
|
|||
companion object { |
|||
private const val TAG = "DNP-NOTIFY" |
|||
private const val CHANNEL_ID = "daily_notifications" |
|||
private const val NOTIFICATION_ID = 1001 |
|||
private const val REQUEST_CODE = 2001 |
|||
|
|||
fun scheduleExactNotification( |
|||
context: Context, |
|||
triggerAtMillis: Long, |
|||
config: UserNotificationConfig |
|||
) { |
|||
val alarmManager = context.getSystemService(Context.ALARM_SERVICE) as AlarmManager |
|||
val intent = Intent(context, NotifyReceiver::class.java).apply { |
|||
putExtra("title", config.title) |
|||
putExtra("body", config.body) |
|||
putExtra("sound", config.sound ?: true) |
|||
putExtra("vibration", config.vibration ?: true) |
|||
putExtra("priority", config.priority ?: "normal") |
|||
} |
|||
|
|||
val pendingIntent = PendingIntent.getBroadcast( |
|||
context, |
|||
REQUEST_CODE, |
|||
intent, |
|||
PendingIntent.FLAG_UPDATE_CURRENT or PendingIntent.FLAG_IMMUTABLE |
|||
) |
|||
|
|||
try { |
|||
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) { |
|||
alarmManager.setExactAndAllowWhileIdle( |
|||
AlarmManager.RTC_WAKEUP, |
|||
triggerAtMillis, |
|||
pendingIntent |
|||
) |
|||
} else { |
|||
alarmManager.setExact( |
|||
AlarmManager.RTC_WAKEUP, |
|||
triggerAtMillis, |
|||
pendingIntent |
|||
) |
|||
} |
|||
Log.i(TAG, "Exact notification scheduled for: $triggerAtMillis") |
|||
} catch (e: SecurityException) { |
|||
Log.w(TAG, "Cannot schedule exact alarm, falling back to inexact", e) |
|||
alarmManager.set( |
|||
AlarmManager.RTC_WAKEUP, |
|||
triggerAtMillis, |
|||
pendingIntent |
|||
) |
|||
} |
|||
} |
|||
|
|||
fun cancelNotification(context: Context) { |
|||
val alarmManager = context.getSystemService(Context.ALARM_SERVICE) as AlarmManager |
|||
val intent = Intent(context, NotifyReceiver::class.java) |
|||
val pendingIntent = PendingIntent.getBroadcast( |
|||
context, |
|||
REQUEST_CODE, |
|||
intent, |
|||
PendingIntent.FLAG_UPDATE_CURRENT or PendingIntent.FLAG_IMMUTABLE |
|||
) |
|||
alarmManager.cancel(pendingIntent) |
|||
Log.i(TAG, "Notification alarm cancelled") |
|||
} |
|||
} |
|||
|
|||
override fun onReceive(context: Context, intent: Intent?) { |
|||
Log.i(TAG, "Notification receiver triggered") |
|||
|
|||
CoroutineScope(Dispatchers.IO).launch { |
|||
try { |
|||
val db = DailyNotificationDatabase.getDatabase(context) |
|||
val latestCache = db.contentCacheDao().getLatest() |
|||
|
|||
if (latestCache == null) { |
|||
Log.w(TAG, "No cached content available for notification") |
|||
recordHistory(db, "notify", "no_content") |
|||
return@launch |
|||
} |
|||
|
|||
// TTL-at-fire check |
|||
val now = System.currentTimeMillis() |
|||
val ttlExpiry = latestCache.fetchedAt + (latestCache.ttlSeconds * 1000L) |
|||
|
|||
if (now > ttlExpiry) { |
|||
Log.i(TAG, "Content TTL expired, skipping notification") |
|||
recordHistory(db, "notify", "skipped_ttl") |
|||
return@launch |
|||
} |
|||
|
|||
// Show notification |
|||
val title = intent?.getStringExtra("title") ?: "Daily Notification" |
|||
val body = intent?.getStringExtra("body") ?: String(latestCache.payload) |
|||
val sound = intent?.getBooleanExtra("sound", true) ?: true |
|||
val vibration = intent?.getBooleanExtra("vibration", true) ?: true |
|||
val priority = intent?.getStringExtra("priority") ?: "normal" |
|||
|
|||
showNotification(context, title, body, sound, vibration, priority) |
|||
recordHistory(db, "notify", "success") |
|||
|
|||
// Fire callbacks |
|||
fireCallbacks(context, db, "onNotifyDelivered", latestCache) |
|||
|
|||
} catch (e: Exception) { |
|||
Log.e(TAG, "Error in notification receiver", e) |
|||
try { |
|||
val db = DailyNotificationDatabase.getDatabase(context) |
|||
recordHistory(db, "notify", "failure", e.message) |
|||
} catch (dbError: Exception) { |
|||
Log.e(TAG, "Failed to record notification failure", dbError) |
|||
} |
|||
} |
|||
} |
|||
} |
|||
|
|||
private fun showNotification( |
|||
context: Context, |
|||
title: String, |
|||
body: String, |
|||
sound: Boolean, |
|||
vibration: Boolean, |
|||
priority: String |
|||
) { |
|||
val notificationManager = context.getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager |
|||
|
|||
// Create notification channel for Android 8.0+ |
|||
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) { |
|||
val channel = NotificationChannel( |
|||
CHANNEL_ID, |
|||
"Daily Notifications", |
|||
when (priority) { |
|||
"high" -> NotificationManager.IMPORTANCE_HIGH |
|||
"low" -> NotificationManager.IMPORTANCE_LOW |
|||
else -> NotificationManager.IMPORTANCE_DEFAULT |
|||
} |
|||
).apply { |
|||
enableVibration(vibration) |
|||
if (!sound) { |
|||
setSound(null, null) |
|||
} |
|||
} |
|||
notificationManager.createNotificationChannel(channel) |
|||
} |
|||
|
|||
val notification = NotificationCompat.Builder(context, CHANNEL_ID) |
|||
.setContentTitle(title) |
|||
.setContentText(body) |
|||
.setSmallIcon(android.R.drawable.ic_dialog_info) |
|||
.setPriority( |
|||
when (priority) { |
|||
"high" -> NotificationCompat.PRIORITY_HIGH |
|||
"low" -> NotificationCompat.PRIORITY_LOW |
|||
else -> NotificationCompat.PRIORITY_DEFAULT |
|||
} |
|||
) |
|||
.setAutoCancel(true) |
|||
.setVibrate(if (vibration) longArrayOf(0, 250, 250, 250) else null) |
|||
.build() |
|||
|
|||
notificationManager.notify(NOTIFICATION_ID, notification) |
|||
Log.i(TAG, "Notification displayed: $title") |
|||
} |
|||
|
|||
private suspend fun recordHistory( |
|||
db: DailyNotificationDatabase, |
|||
kind: String, |
|||
outcome: String, |
|||
diagJson: String? = null |
|||
) { |
|||
try { |
|||
db.historyDao().insert( |
|||
History( |
|||
refId = "notify_${System.currentTimeMillis()}", |
|||
kind = kind, |
|||
occurredAt = System.currentTimeMillis(), |
|||
outcome = outcome, |
|||
diagJson = diagJson |
|||
) |
|||
) |
|||
} catch (e: Exception) { |
|||
Log.e(TAG, "Failed to record history", e) |
|||
} |
|||
} |
|||
|
|||
private suspend fun fireCallbacks( |
|||
context: Context, |
|||
db: DailyNotificationDatabase, |
|||
eventType: String, |
|||
contentCache: ContentCache |
|||
) { |
|||
try { |
|||
val callbacks = db.callbackDao().getEnabled() |
|||
callbacks.forEach { callback -> |
|||
try { |
|||
when (callback.kind) { |
|||
"http" -> fireHttpCallback(callback, eventType, contentCache) |
|||
"local" -> fireLocalCallback(context, callback, eventType, contentCache) |
|||
else -> Log.w(TAG, "Unknown callback kind: ${callback.kind}") |
|||
} |
|||
} catch (e: Exception) { |
|||
Log.e(TAG, "Failed to fire callback ${callback.id}", e) |
|||
recordHistory(db, "callback", "failure", "{\"callback_id\": \"${callback.id}\", \"error\": \"${e.message}\"}") |
|||
} |
|||
} |
|||
} catch (e: Exception) { |
|||
Log.e(TAG, "Failed to fire callbacks", e) |
|||
} |
|||
} |
|||
|
|||
private suspend fun fireHttpCallback( |
|||
callback: Callback, |
|||
eventType: String, |
|||
contentCache: ContentCache |
|||
) { |
|||
// HTTP callback implementation would go here |
|||
Log.i(TAG, "HTTP callback fired: ${callback.id} for event: $eventType") |
|||
} |
|||
|
|||
private suspend fun fireLocalCallback( |
|||
context: Context, |
|||
callback: Callback, |
|||
eventType: String, |
|||
contentCache: ContentCache |
|||
) { |
|||
// Local callback implementation would go here |
|||
Log.i(TAG, "Local callback fired: ${callback.id} for event: $eventType") |
|||
} |
|||
} |
|||
@ -0,0 +1,255 @@ |
|||
|
|||
# Daily Notification Plugin — Phase 2 Recommendations (v3) |
|||
|
|||
> This directive assumes Phase 1 (API surface + tests) is complete and aligns with the current codebase. It focuses on **platform implementations**, **storage/TTL**, **callbacks**, **observability**, and **security**. |
|||
|
|||
--- |
|||
|
|||
## 1) Milestones & Order of Work |
|||
|
|||
1. **Android Core (Week 1–2)** |
|||
- Fetch: WorkManager (`Constraints: NETWORK_CONNECTED`, backoff: exponential) |
|||
- Notify: AlarmManager (or Exact alarms if permitted), NotificationManager |
|||
- Boot resilience: `RECEIVE_BOOT_COMPLETED` receiver reschedules jobs |
|||
- Shared SQLite schema + DAO layer (Room recommended) |
|||
2. **Callback Registry (Week 2)** — shared TS interface + native bridges |
|||
3. **Observability & Health (Week 2–3)** — event codes, status endpoints, history compaction |
|||
4. **iOS Parity (Week 3–4)** — BGTaskScheduler + UNUserNotificationCenter |
|||
5. **Web SW/Push (Week 4)** — SW events + IndexedDB (mirror schema), periodic sync fallback |
|||
6. **Docs & Examples (Week 4)** — migration, enterprise callbacks, health dashboards |
|||
|
|||
--- |
|||
|
|||
## 2) Storage & TTL — Concrete Schema |
|||
|
|||
> Keep **TTL-at-fire** invariant and **rolling window armed**. Use normalized tables and a minimal DAO. |
|||
|
|||
### SQLite (DDL) |
|||
|
|||
```sql |
|||
CREATE TABLE IF NOT EXISTS content_cache ( |
|||
id TEXT PRIMARY KEY, |
|||
fetched_at INTEGER NOT NULL, -- epoch ms |
|||
ttl_seconds INTEGER NOT NULL, |
|||
payload BLOB NOT NULL, |
|||
meta TEXT |
|||
); |
|||
|
|||
CREATE TABLE IF NOT EXISTS schedules ( |
|||
id TEXT PRIMARY KEY, |
|||
kind TEXT NOT NULL CHECK (kind IN ('fetch','notify')), |
|||
cron TEXT, -- optional: cron expression |
|||
clock_time TEXT, -- optional: HH:mm |
|||
enabled INTEGER NOT NULL DEFAULT 1, |
|||
last_run_at INTEGER, |
|||
next_run_at INTEGER, |
|||
jitter_ms INTEGER DEFAULT 0, |
|||
backoff_policy TEXT DEFAULT 'exp', |
|||
state_json TEXT |
|||
); |
|||
|
|||
CREATE TABLE IF NOT EXISTS callbacks ( |
|||
id TEXT PRIMARY KEY, |
|||
kind TEXT NOT NULL CHECK (kind IN ('http','local','queue')), |
|||
target TEXT NOT NULL, -- url_or_local |
|||
headers_json TEXT, |
|||
enabled INTEGER NOT NULL DEFAULT 1, |
|||
created_at INTEGER NOT NULL |
|||
); |
|||
|
|||
CREATE TABLE IF NOT EXISTS history ( |
|||
id INTEGER PRIMARY KEY AUTOINCREMENT, |
|||
ref_id TEXT, -- content or schedule id |
|||
kind TEXT NOT NULL, -- fetch/notify/callback |
|||
occurred_at INTEGER NOT NULL, |
|||
duration_ms INTEGER, |
|||
outcome TEXT NOT NULL, -- success|failure|skipped_ttl|circuit_open |
|||
diag_json TEXT |
|||
); |
|||
|
|||
CREATE INDEX IF NOT EXISTS idx_history_time ON history(occurred_at); |
|||
CREATE INDEX IF NOT EXISTS idx_cache_time ON content_cache(fetched_at); |
|||
``` |
|||
|
|||
### TTL-at-fire Rule |
|||
|
|||
- On notification fire: `if (now > fetched_at + ttl_seconds) -> skip (record outcome=skipped_ttl)`. |
|||
- Maintain a **prep guarantee**: ensure a fresh cache entry for the next window even after failures (schedule a fetch on next window). |
|||
|
|||
--- |
|||
|
|||
## 3) Android Implementation Sketch |
|||
|
|||
### WorkManager for Fetch |
|||
|
|||
```kotlin |
|||
class FetchWorker( |
|||
appContext: Context, |
|||
workerParams: WorkerParameters |
|||
) : CoroutineWorker(appContext, workerParams) { |
|||
|
|||
override suspend fun doWork(): Result = withContext(Dispatchers.IO) { |
|||
val start = SystemClock.elapsedRealtime() |
|||
try { |
|||
val payload = fetchContent() // http call / local generator |
|||
dao.upsertCache(ContentCache(...)) |
|||
logEvent("DNP-FETCH-SUCCESS", start) |
|||
Result.success() |
|||
} catch (e: IOException) { |
|||
logEvent("DNP-FETCH-FAILURE", start, e) |
|||
Result.retry() |
|||
} catch (e: Throwable) { |
|||
logEvent("DNP-FETCH-FAILURE", start, e) |
|||
Result.failure() |
|||
} |
|||
} |
|||
} |
|||
``` |
|||
|
|||
**Constraints**: `Constraints.Builder().setRequiredNetworkType(NetworkType.CONNECTED).build()` |
|||
**Backoff**: `setBackoffCriteria(BackoffPolicy.EXPONENTIAL, 30, TimeUnit.SECONDS)` |
|||
|
|||
### AlarmManager for Notify |
|||
|
|||
```kotlin |
|||
fun scheduleExactNotification(context: Context, triggerAtMillis: Long) { |
|||
val alarmMgr = context.getSystemService(Context.ALARM_SERVICE) as AlarmManager |
|||
val pi = PendingIntent.getBroadcast(context, REQ_ID, Intent(context, NotifyReceiver::class.java), FLAG_IMMUTABLE) |
|||
alarmMgr.setExactAndAllowWhileIdle(AlarmManager.RTC_WAKEUP, triggerAtMillis, pi) |
|||
} |
|||
|
|||
class NotifyReceiver : BroadcastReceiver() { |
|||
override fun onReceive(ctx: Context, intent: Intent?) { |
|||
val cache = dao.latestCache() |
|||
if (cache == null) return |
|||
if (System.currentTimeMillis() > cache.fetched_at + cache.ttl_seconds * 1000) { |
|||
recordHistory("notify", "skipped_ttl"); return |
|||
} |
|||
showNotification(ctx, cache) |
|||
recordHistory("notify", "success") |
|||
fireCallbacks("onNotifyDelivered") |
|||
} |
|||
} |
|||
``` |
|||
|
|||
### Boot Reschedule |
|||
|
|||
- Manifest: `RECEIVE_BOOT_COMPLETED` |
|||
- On boot: read `schedules.enabled=1` and re-schedule WorkManager/AlarmManager |
|||
|
|||
--- |
|||
|
|||
## 4) Callback Registry — Minimal Viable Implementation |
|||
|
|||
### TS Core |
|||
|
|||
```ts |
|||
export type CallbackKind = 'http' | 'local' | 'queue'; |
|||
|
|||
export interface CallbackEvent { |
|||
id: string; |
|||
at: number; |
|||
type: 'onFetchStart' | 'onFetchSuccess' | 'onFetchFailure' | |
|||
'onNotifyStart' | 'onNotifyDelivered' | 'onNotifySkippedTTL' | 'onNotifyFailure'; |
|||
payload?: unknown; |
|||
} |
|||
|
|||
export type CallbackFunction = (e: CallbackEvent) => Promise<void> | void; |
|||
``` |
|||
|
|||
### Delivery Semantics |
|||
|
|||
- **Exactly-once attempt per event**, persisted `history` row |
|||
- **Retry**: exponential backoff with cap; open **circuit** per `callback.id` on repeated failures |
|||
- **Redaction**: apply header/body redaction before persisting `diag_json` |
|||
|
|||
### HTTP Example |
|||
|
|||
```ts |
|||
async function deliverHttpCallback(cb: CallbackRecord, event: CallbackEvent) { |
|||
const start = performance.now(); |
|||
try { |
|||
const res = await fetch(cb.target, { |
|||
method: 'POST', |
|||
headers: { 'content-type': 'application/json', ...(cb.headers ?? {}) }, |
|||
body: JSON.stringify(event), |
|||
}); |
|||
recordHistory(cb.id, 'callback', 'success', start, { status: res.status }); |
|||
} catch (err) { |
|||
scheduleRetry(cb.id, event); // capped exponential |
|||
recordHistory(cb.id, 'callback', 'failure', start, { error: String(err) }); |
|||
} |
|||
} |
|||
``` |
|||
|
|||
--- |
|||
|
|||
## 5) Observability & Health |
|||
|
|||
- **Event Codes**: `DNP-FETCH-*`, `DNP-NOTIFY-*`, `DNP-CB-*` |
|||
- **Health API** (TS): `getDualScheduleStatus()` returns `{ nextRuns, lastOutcomes, cacheAgeMs, staleArmed, queueDepth }` |
|||
- **Compaction**: nightly job to prune `history` > 30 days |
|||
- **Device Debug**: Android broadcast to dump status to logcat for field diagnostics |
|||
|
|||
--- |
|||
|
|||
## 6) Security & Permissions |
|||
|
|||
- Default **HTTPS-only** callbacks, opt-out via explicit dev flag |
|||
- Android: runtime gate for `POST_NOTIFICATIONS`; show rationale UI for exact alarms (if requested) |
|||
- **PII/Secrets**: redact before persistence; never log tokens |
|||
- **Input Validation**: sanitize HTTP callback targets; enforce allowlist pattern (e.g., `https://*.yourdomain.tld` in prod) |
|||
|
|||
--- |
|||
|
|||
## 7) Performance & Battery |
|||
|
|||
- **±Jitter (5m)** for fetch; coalesce same-minute schedules |
|||
- **Retry Caps**: ≤ 5 attempts, upper bound 60 min backoff |
|||
- **Network Guards**: avoid waking when offline; use WorkManager constraints to defer |
|||
- **Back-Pressure**: cap concurrent callbacks; open circuit on sustained failures |
|||
|
|||
--- |
|||
|
|||
## 8) Tests You Can Add Now |
|||
|
|||
- **TTL Edge Cases**: past/future timezones, DST cutovers |
|||
- **Retry & Circuit**: force network failures, assert capped retries + circuit open |
|||
- **Boot Reschedule**: instrumentation test to simulate reboot and check re-arming |
|||
- **SW/IndexedDB**: headless test verifying cache write/read + TTL skip |
|||
|
|||
--- |
|||
|
|||
## 9) Documentation Tasks |
|||
|
|||
- API reference for new **health** and **callback** semantics |
|||
- Platform guides: Android exact alarm notes, iOS background limits, Web SW lifecycle |
|||
- Migration note: why `scheduleDualNotification` is preferred; compat wrappers policy |
|||
- “Runbook” for QA: how to toggle jitter/backoff; how to inspect `history` |
|||
|
|||
--- |
|||
|
|||
## 10) Acceptance Criteria (Phase 2) |
|||
|
|||
- Android end-to-end demo: fetch → cache → TTL check → notify → callback(s) → history |
|||
- Health endpoint returns non-null next run, recent outcomes, and cache age |
|||
- iOS parity path demonstrated on simulator (background fetch + local notif) |
|||
- Web SW functional on Chromium + Firefox with IndexedDB persistence |
|||
- Logs show structured `DNP-*` events; compaction reduces history size as configured |
|||
- Docs updated; examples build and run |
|||
|
|||
--- |
|||
|
|||
## 11) Risks & Mitigations |
|||
|
|||
- **Doze/Idle drops alarms** → prefer WorkManager + exact when allowed; add tolerance window |
|||
- **iOS background unpredictability** → encourage scheduled “fetch windows”; document silent-push optionality |
|||
- **Web Push unavailable** → periodic sync + foreground fallback; degrade gracefully |
|||
- **Callback storms** → batch events where possible; per-callback rate limit |
|||
|
|||
--- |
|||
|
|||
## 12) Versioning |
|||
|
|||
- Release as `1.1.0` when Android path merges; mark wrappers as **soft-deprecated** in docs |
|||
- Keep zero-padded doc versions in `/doc/` and release notes linking to them |
|||
@ -0,0 +1,283 @@ |
|||
/** |
|||
* Callback Registry Implementation |
|||
* Provides uniform callback lifecycle usable from any platform |
|||
* |
|||
* @author Matthew Raymer |
|||
* @version 1.1.0 |
|||
*/ |
|||
|
|||
export type CallbackKind = 'http' | 'local' | 'queue'; |
|||
|
|||
export interface CallbackEvent { |
|||
id: string; |
|||
at: number; |
|||
type: 'onFetchStart' | 'onFetchSuccess' | 'onFetchFailure' | |
|||
'onNotifyStart' | 'onNotifyDelivered' | 'onNotifySkippedTTL' | 'onNotifyFailure'; |
|||
payload?: unknown; |
|||
} |
|||
|
|||
export type CallbackFunction = (e: CallbackEvent) => Promise<void> | void; |
|||
|
|||
export interface CallbackRecord { |
|||
id: string; |
|||
kind: CallbackKind; |
|||
target: string; |
|||
headers?: Record<string, string>; |
|||
enabled: boolean; |
|||
createdAt: number; |
|||
retryCount?: number; |
|||
lastFailure?: number; |
|||
circuitOpen?: boolean; |
|||
} |
|||
|
|||
export interface CallbackRegistry { |
|||
register(id: string, callback: CallbackRecord): Promise<void>; |
|||
unregister(id: string): Promise<void>; |
|||
fire(event: CallbackEvent): Promise<void>; |
|||
getRegistered(): Promise<CallbackRecord[]>; |
|||
getStatus(): Promise<{ |
|||
total: number; |
|||
enabled: number; |
|||
circuitOpen: number; |
|||
lastActivity: number; |
|||
}>; |
|||
} |
|||
|
|||
/** |
|||
* Callback Registry Implementation |
|||
* Handles callback registration, delivery, and circuit breaker logic |
|||
*/ |
|||
export class CallbackRegistryImpl implements CallbackRegistry { |
|||
private callbacks = new Map<string, CallbackRecord>(); |
|||
private localCallbacks = new Map<string, CallbackFunction>(); |
|||
private retryQueue = new Map<string, CallbackEvent[]>(); |
|||
private circuitBreakers = new Map<string, { |
|||
failures: number; |
|||
lastFailure: number; |
|||
open: boolean; |
|||
}>(); |
|||
|
|||
constructor() { |
|||
this.startRetryProcessor(); |
|||
} |
|||
|
|||
async register(id: string, callback: CallbackRecord): Promise<void> { |
|||
this.callbacks.set(id, callback); |
|||
|
|||
// Initialize circuit breaker
|
|||
if (!this.circuitBreakers.has(id)) { |
|||
this.circuitBreakers.set(id, { |
|||
failures: 0, |
|||
lastFailure: 0, |
|||
open: false |
|||
}); |
|||
} |
|||
|
|||
console.log(`DNP-CB-REGISTER: Callback ${id} registered (${callback.kind})`); |
|||
} |
|||
|
|||
async unregister(id: string): Promise<void> { |
|||
this.callbacks.delete(id); |
|||
this.localCallbacks.delete(id); |
|||
this.retryQueue.delete(id); |
|||
this.circuitBreakers.delete(id); |
|||
|
|||
console.log(`DNP-CB-UNREGISTER: Callback ${id} unregistered`); |
|||
} |
|||
|
|||
async fire(event: CallbackEvent): Promise<void> { |
|||
const enabledCallbacks = Array.from(this.callbacks.values()) |
|||
.filter(cb => cb.enabled); |
|||
|
|||
console.log(`DNP-CB-FIRE: Firing event ${event.type} to ${enabledCallbacks.length} callbacks`); |
|||
|
|||
for (const callback of enabledCallbacks) { |
|||
try { |
|||
await this.deliverCallback(callback, event); |
|||
} catch (error) { |
|||
console.error(`DNP-CB-FIRE-ERROR: Failed to deliver to ${callback.id}`, error); |
|||
await this.handleCallbackFailure(callback, event, error); |
|||
} |
|||
} |
|||
} |
|||
|
|||
async getRegistered(): Promise<CallbackRecord[]> { |
|||
return Array.from(this.callbacks.values()); |
|||
} |
|||
|
|||
async getStatus(): Promise<{ |
|||
total: number; |
|||
enabled: number; |
|||
circuitOpen: number; |
|||
lastActivity: number; |
|||
}> { |
|||
const callbacks = Array.from(this.callbacks.values()); |
|||
const circuitBreakers = Array.from(this.circuitBreakers.values()); |
|||
|
|||
return { |
|||
total: callbacks.length, |
|||
enabled: callbacks.filter(cb => cb.enabled).length, |
|||
circuitOpen: circuitBreakers.filter(cb => cb.open).length, |
|||
lastActivity: Math.max( |
|||
...callbacks.map(cb => cb.createdAt), |
|||
...circuitBreakers.map(cb => cb.lastFailure) |
|||
) |
|||
}; |
|||
} |
|||
|
|||
private async deliverCallback(callback: CallbackRecord, event: CallbackEvent): Promise<void> { |
|||
const circuitBreaker = this.circuitBreakers.get(callback.id); |
|||
|
|||
// Check circuit breaker
|
|||
if (circuitBreaker?.open) { |
|||
console.warn(`DNP-CB-CIRCUIT: Circuit open for ${callback.id}, skipping delivery`); |
|||
return; |
|||
} |
|||
|
|||
const start = performance.now(); |
|||
|
|||
try { |
|||
switch (callback.kind) { |
|||
case 'http': |
|||
await this.deliverHttpCallback(callback, event); |
|||
break; |
|||
case 'local': |
|||
await this.deliverLocalCallback(callback, event); |
|||
break; |
|||
case 'queue': |
|||
await this.deliverQueueCallback(callback, event); |
|||
break; |
|||
default: |
|||
throw new Error(`Unknown callback kind: ${callback.kind}`); |
|||
} |
|||
|
|||
// Reset circuit breaker on success
|
|||
if (circuitBreaker) { |
|||
circuitBreaker.failures = 0; |
|||
circuitBreaker.open = false; |
|||
} |
|||
|
|||
const duration = performance.now() - start; |
|||
console.log(`DNP-CB-SUCCESS: Delivered to ${callback.id} in ${duration.toFixed(2)}ms`); |
|||
|
|||
} catch (error) { |
|||
throw error; |
|||
} |
|||
} |
|||
|
|||
private async deliverHttpCallback(callback: CallbackRecord, event: CallbackEvent): Promise<void> { |
|||
const response = await fetch(callback.target, { |
|||
method: 'POST', |
|||
headers: { |
|||
'Content-Type': 'application/json', |
|||
...callback.headers |
|||
}, |
|||
body: JSON.stringify({ |
|||
...event, |
|||
callbackId: callback.id, |
|||
timestamp: Date.now() |
|||
}) |
|||
}); |
|||
|
|||
if (!response.ok) { |
|||
throw new Error(`HTTP ${response.status}: ${response.statusText}`); |
|||
} |
|||
} |
|||
|
|||
private async deliverLocalCallback(callback: CallbackRecord, event: CallbackEvent): Promise<void> { |
|||
const localCallback = this.localCallbacks.get(callback.id); |
|||
if (!localCallback) { |
|||
throw new Error(`Local callback ${callback.id} not found`); |
|||
} |
|||
|
|||
await localCallback(event); |
|||
} |
|||
|
|||
private async deliverQueueCallback(callback: CallbackRecord, event: CallbackEvent): Promise<void> { |
|||
// Queue callback implementation would go here
|
|||
// For now, just log the event
|
|||
console.log(`DNP-CB-QUEUE: Queued event ${event.type} for ${callback.id}`); |
|||
} |
|||
|
|||
private async handleCallbackFailure( |
|||
callback: CallbackRecord, |
|||
event: CallbackEvent, |
|||
error: unknown |
|||
): Promise<void> { |
|||
const circuitBreaker = this.circuitBreakers.get(callback.id); |
|||
|
|||
if (circuitBreaker) { |
|||
circuitBreaker.failures++; |
|||
circuitBreaker.lastFailure = Date.now(); |
|||
|
|||
// Open circuit after 5 consecutive failures
|
|||
if (circuitBreaker.failures >= 5) { |
|||
circuitBreaker.open = true; |
|||
console.error(`DNP-CB-CIRCUIT-OPEN: Circuit opened for ${callback.id} after ${circuitBreaker.failures} failures`); |
|||
} |
|||
} |
|||
|
|||
// Schedule retry with exponential backoff
|
|||
await this.scheduleRetry(callback, event); |
|||
|
|||
console.error(`DNP-CB-FAILURE: Callback ${callback.id} failed`, error); |
|||
} |
|||
|
|||
private async scheduleRetry(callback: CallbackRecord, event: CallbackEvent): Promise<void> { |
|||
const retryCount = callback.retryCount || 0; |
|||
|
|||
if (retryCount >= 5) { |
|||
console.warn(`DNP-CB-RETRY-LIMIT: Max retries reached for ${callback.id}`); |
|||
return; |
|||
} |
|||
|
|||
const backoffMs = Math.min(1000 * Math.pow(2, retryCount), 60000); // Cap at 1 minute
|
|||
const retryEvent = { ...event, retryCount: retryCount + 1 }; |
|||
|
|||
if (!this.retryQueue.has(callback.id)) { |
|||
this.retryQueue.set(callback.id, []); |
|||
} |
|||
|
|||
this.retryQueue.get(callback.id)!.push(retryEvent); |
|||
|
|||
console.log(`DNP-CB-RETRY: Scheduled retry ${retryCount + 1} for ${callback.id} in ${backoffMs}ms`); |
|||
} |
|||
|
|||
private startRetryProcessor(): void { |
|||
setInterval(async () => { |
|||
for (const [callbackId, events] of this.retryQueue.entries()) { |
|||
if (events.length === 0) continue; |
|||
|
|||
const callback = this.callbacks.get(callbackId); |
|||
if (!callback) { |
|||
this.retryQueue.delete(callbackId); |
|||
continue; |
|||
} |
|||
|
|||
const event = events.shift(); |
|||
if (!event) continue; |
|||
|
|||
try { |
|||
await this.deliverCallback(callback, event); |
|||
} catch (error) { |
|||
console.error(`DNP-CB-RETRY-FAILED: Retry failed for ${callbackId}`, error); |
|||
} |
|||
} |
|||
}, 5000); // Process retries every 5 seconds
|
|||
} |
|||
|
|||
// Register local callback function
|
|||
registerLocalCallback(id: string, callback: CallbackFunction): void { |
|||
this.localCallbacks.set(id, callback); |
|||
console.log(`DNP-CB-LOCAL: Local callback ${id} registered`); |
|||
} |
|||
|
|||
// Unregister local callback function
|
|||
unregisterLocalCallback(id: string): void { |
|||
this.localCallbacks.delete(id); |
|||
console.log(`DNP-CB-LOCAL: Local callback ${id} unregistered`); |
|||
} |
|||
} |
|||
|
|||
// Singleton instance
|
|||
export const callbackRegistry = new CallbackRegistryImpl(); |
|||
@ -0,0 +1,311 @@ |
|||
/** |
|||
* Observability & Health Monitoring Implementation |
|||
* Provides structured logging, event codes, and health monitoring |
|||
* |
|||
* @author Matthew Raymer |
|||
* @version 1.1.0 |
|||
*/ |
|||
|
|||
export interface HealthStatus { |
|||
nextRuns: number[]; |
|||
lastOutcomes: string[]; |
|||
cacheAgeMs: number | null; |
|||
staleArmed: boolean; |
|||
queueDepth: number; |
|||
circuitBreakers: { |
|||
total: number; |
|||
open: number; |
|||
failures: number; |
|||
}; |
|||
performance: { |
|||
avgFetchTime: number; |
|||
avgNotifyTime: number; |
|||
successRate: number; |
|||
}; |
|||
} |
|||
|
|||
export interface EventLog { |
|||
id: string; |
|||
timestamp: number; |
|||
level: 'INFO' | 'WARN' | 'ERROR'; |
|||
eventCode: string; |
|||
message: string; |
|||
data?: Record<string, unknown>; |
|||
duration?: number; |
|||
} |
|||
|
|||
export interface PerformanceMetrics { |
|||
fetchTimes: number[]; |
|||
notifyTimes: number[]; |
|||
callbackTimes: number[]; |
|||
successCount: number; |
|||
failureCount: number; |
|||
lastReset: number; |
|||
} |
|||
|
|||
/** |
|||
* Observability Manager |
|||
* Handles structured logging, health monitoring, and performance tracking |
|||
*/ |
|||
export class ObservabilityManager { |
|||
private eventLogs: EventLog[] = []; |
|||
private performanceMetrics: PerformanceMetrics = { |
|||
fetchTimes: [], |
|||
notifyTimes: [], |
|||
callbackTimes: [], |
|||
successCount: 0, |
|||
failureCount: 0, |
|||
lastReset: Date.now() |
|||
}; |
|||
private maxLogs = 1000; |
|||
private maxMetrics = 100; |
|||
|
|||
/** |
|||
* Log structured event with event code |
|||
*/ |
|||
logEvent( |
|||
level: 'INFO' | 'WARN' | 'ERROR', |
|||
eventCode: string, |
|||
message: string, |
|||
data?: Record<string, unknown>, |
|||
duration?: number |
|||
): void { |
|||
const event: EventLog = { |
|||
id: this.generateEventId(), |
|||
timestamp: Date.now(), |
|||
level, |
|||
eventCode, |
|||
message, |
|||
data, |
|||
duration |
|||
}; |
|||
|
|||
this.eventLogs.unshift(event); |
|||
|
|||
// Keep only recent logs
|
|||
if (this.eventLogs.length > this.maxLogs) { |
|||
this.eventLogs = this.eventLogs.slice(0, this.maxLogs); |
|||
} |
|||
|
|||
// Console output with structured format
|
|||
const logMessage = `[${eventCode}] ${message}`; |
|||
const logData = data ? ` | Data: ${JSON.stringify(data)}` : ''; |
|||
const logDuration = duration ? ` | Duration: ${duration}ms` : ''; |
|||
|
|||
switch (level) { |
|||
case 'INFO': |
|||
console.log(logMessage + logData + logDuration); |
|||
break; |
|||
case 'WARN': |
|||
console.warn(logMessage + logData + logDuration); |
|||
break; |
|||
case 'ERROR': |
|||
console.error(logMessage + logData + logDuration); |
|||
break; |
|||
} |
|||
} |
|||
|
|||
/** |
|||
* Record performance metrics |
|||
*/ |
|||
recordMetric(type: 'fetch' | 'notify' | 'callback', duration: number, success: boolean): void { |
|||
switch (type) { |
|||
case 'fetch': |
|||
this.performanceMetrics.fetchTimes.push(duration); |
|||
break; |
|||
case 'notify': |
|||
this.performanceMetrics.notifyTimes.push(duration); |
|||
break; |
|||
case 'callback': |
|||
this.performanceMetrics.callbackTimes.push(duration); |
|||
break; |
|||
} |
|||
|
|||
if (success) { |
|||
this.performanceMetrics.successCount++; |
|||
} else { |
|||
this.performanceMetrics.failureCount++; |
|||
} |
|||
|
|||
// Keep only recent metrics
|
|||
this.trimMetrics(); |
|||
} |
|||
|
|||
/** |
|||
* Get health status |
|||
*/ |
|||
async getHealthStatus(): Promise<HealthStatus> { |
|||
const now = Date.now(); |
|||
const recentLogs = this.eventLogs.filter(log => now - log.timestamp < 24 * 60 * 60 * 1000); // Last 24 hours
|
|||
|
|||
// Calculate next runs (mock implementation)
|
|||
const nextRuns = this.calculateNextRuns(); |
|||
|
|||
// Get last outcomes from recent logs
|
|||
const lastOutcomes = recentLogs |
|||
.filter(log => log.eventCode.startsWith('DNP-FETCH-') || log.eventCode.startsWith('DNP-NOTIFY-')) |
|||
.slice(0, 10) |
|||
.map(log => log.eventCode); |
|||
|
|||
// Calculate cache age (mock implementation)
|
|||
const cacheAgeMs = this.calculateCacheAge(); |
|||
|
|||
// Check if stale armed
|
|||
const staleArmed = cacheAgeMs ? cacheAgeMs > 3600000 : true; // 1 hour
|
|||
|
|||
// Calculate queue depth
|
|||
const queueDepth = recentLogs.filter(log => |
|||
log.eventCode.includes('QUEUE') || log.eventCode.includes('RETRY') |
|||
).length; |
|||
|
|||
// Circuit breaker status
|
|||
const circuitBreakers = this.getCircuitBreakerStatus(); |
|||
|
|||
// Performance metrics
|
|||
const performance = this.calculatePerformanceMetrics(); |
|||
|
|||
return { |
|||
nextRuns, |
|||
lastOutcomes, |
|||
cacheAgeMs, |
|||
staleArmed, |
|||
queueDepth, |
|||
circuitBreakers, |
|||
performance |
|||
}; |
|||
} |
|||
|
|||
/** |
|||
* Get recent event logs |
|||
*/ |
|||
getRecentLogs(limit: number = 50): EventLog[] { |
|||
return this.eventLogs.slice(0, limit); |
|||
} |
|||
|
|||
/** |
|||
* Get performance metrics |
|||
*/ |
|||
getPerformanceMetrics(): PerformanceMetrics { |
|||
return { ...this.performanceMetrics }; |
|||
} |
|||
|
|||
/** |
|||
* Reset performance metrics |
|||
*/ |
|||
resetMetrics(): void { |
|||
this.performanceMetrics = { |
|||
fetchTimes: [], |
|||
notifyTimes: [], |
|||
callbackTimes: [], |
|||
successCount: 0, |
|||
failureCount: 0, |
|||
lastReset: Date.now() |
|||
}; |
|||
|
|||
this.logEvent('INFO', 'DNP-METRICS-RESET', 'Performance metrics reset'); |
|||
} |
|||
|
|||
/** |
|||
* Compact old logs (called by cleanup job) |
|||
*/ |
|||
compactLogs(olderThanMs: number = 30 * 24 * 60 * 60 * 1000): number { // 30 days
|
|||
const cutoff = Date.now() - olderThanMs; |
|||
const initialCount = this.eventLogs.length; |
|||
|
|||
this.eventLogs = this.eventLogs.filter(log => log.timestamp >= cutoff); |
|||
|
|||
const removedCount = initialCount - this.eventLogs.length; |
|||
if (removedCount > 0) { |
|||
this.logEvent('INFO', 'DNP-LOGS-COMPACTED', `Removed ${removedCount} old logs`); |
|||
} |
|||
|
|||
return removedCount; |
|||
} |
|||
|
|||
// Private helper methods
|
|||
private generateEventId(): string { |
|||
return `evt_${Date.now()}_${Math.random().toString(36).substr(2, 9)}`; |
|||
} |
|||
|
|||
private trimMetrics(): void { |
|||
if (this.performanceMetrics.fetchTimes.length > this.maxMetrics) { |
|||
this.performanceMetrics.fetchTimes = this.performanceMetrics.fetchTimes.slice(-this.maxMetrics); |
|||
} |
|||
if (this.performanceMetrics.notifyTimes.length > this.maxMetrics) { |
|||
this.performanceMetrics.notifyTimes = this.performanceMetrics.notifyTimes.slice(-this.maxMetrics); |
|||
} |
|||
if (this.performanceMetrics.callbackTimes.length > this.maxMetrics) { |
|||
this.performanceMetrics.callbackTimes = this.performanceMetrics.callbackTimes.slice(-this.maxMetrics); |
|||
} |
|||
} |
|||
|
|||
private calculateNextRuns(): number[] { |
|||
// Mock implementation - would calculate from actual schedules
|
|||
const now = Date.now(); |
|||
return [ |
|||
now + (60 * 60 * 1000), // 1 hour from now
|
|||
now + (24 * 60 * 60 * 1000) // 24 hours from now
|
|||
]; |
|||
} |
|||
|
|||
private calculateCacheAge(): number | null { |
|||
// Mock implementation - would get from actual cache
|
|||
return 1800000; // 30 minutes
|
|||
} |
|||
|
|||
private getCircuitBreakerStatus(): { total: number; open: number; failures: number } { |
|||
// Mock implementation - would get from actual circuit breakers
|
|||
return { |
|||
total: 3, |
|||
open: 1, |
|||
failures: 5 |
|||
}; |
|||
} |
|||
|
|||
private calculatePerformanceMetrics(): { |
|||
avgFetchTime: number; |
|||
avgNotifyTime: number; |
|||
successRate: number; |
|||
} { |
|||
const fetchTimes = this.performanceMetrics.fetchTimes; |
|||
const notifyTimes = this.performanceMetrics.notifyTimes; |
|||
const totalOperations = this.performanceMetrics.successCount + this.performanceMetrics.failureCount; |
|||
|
|||
return { |
|||
avgFetchTime: fetchTimes.length > 0 ? |
|||
fetchTimes.reduce((a, b) => a + b, 0) / fetchTimes.length : 0, |
|||
avgNotifyTime: notifyTimes.length > 0 ? |
|||
notifyTimes.reduce((a, b) => a + b, 0) / notifyTimes.length : 0, |
|||
successRate: totalOperations > 0 ? |
|||
this.performanceMetrics.successCount / totalOperations : 0 |
|||
}; |
|||
} |
|||
} |
|||
|
|||
// Singleton instance
|
|||
export const observability = new ObservabilityManager(); |
|||
|
|||
// Event code constants
|
|||
export const EVENT_CODES = { |
|||
FETCH_START: 'DNP-FETCH-START', |
|||
FETCH_SUCCESS: 'DNP-FETCH-SUCCESS', |
|||
FETCH_FAILURE: 'DNP-FETCH-FAILURE', |
|||
FETCH_RETRY: 'DNP-FETCH-RETRY', |
|||
NOTIFY_START: 'DNP-NOTIFY-START', |
|||
NOTIFY_SUCCESS: 'DNP-NOTIFY-SUCCESS', |
|||
NOTIFY_FAILURE: 'DNP-NOTIFY-FAILURE', |
|||
NOTIFY_SKIPPED_TTL: 'DNP-NOTIFY-SKIPPED-TTL', |
|||
CALLBACK_START: 'DNP-CB-START', |
|||
CALLBACK_SUCCESS: 'DNP-CB-SUCCESS', |
|||
CALLBACK_FAILURE: 'DNP-CB-FAILURE', |
|||
CALLBACK_RETRY: 'DNP-CB-RETRY', |
|||
CALLBACK_CIRCUIT_OPEN: 'DNP-CB-CIRCUIT-OPEN', |
|||
CALLBACK_CIRCUIT_CLOSE: 'DNP-CB-CIRCUIT-CLOSE', |
|||
BOOT_RECOVERY: 'DNP-BOOT-RECOVERY', |
|||
SCHEDULE_UPDATE: 'DNP-SCHEDULE-UPDATE', |
|||
CACHE_HIT: 'DNP-CACHE-HIT', |
|||
CACHE_MISS: 'DNP-CACHE-MISS', |
|||
TTL_EXPIRED: 'DNP-TTL-EXPIRED', |
|||
METRICS_RESET: 'DNP-METRICS-RESET', |
|||
LOGS_COMPACTED: 'DNP-LOGS-COMPACTED' |
|||
} as const; |
|||
Loading…
Reference in new issue