Fallback mode v2 #6872
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,87 @@ | ||
| /* | ||
| * Copyright 2025 Google LLC | ||
| * | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
|
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| package com.google.firebase.sessions | ||
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||
| import android.util.Log | ||
| import com.google.firebase.annotations.concurrent.Background | ||
| import com.google.firebase.sessions.api.FirebaseSessionsDependencies | ||
| import com.google.firebase.sessions.api.SessionSubscriber | ||
| import com.google.firebase.sessions.settings.SessionsSettings | ||
| import javax.inject.Inject | ||
| import javax.inject.Singleton | ||
| import kotlin.coroutines.CoroutineContext | ||
| import kotlinx.coroutines.CoroutineScope | ||
| import kotlinx.coroutines.launch | ||
|
|
||
| /** | ||
| * This is the fallback module for datastore implementation (SharedSessionRepository). We are | ||
| * fallback to pre multi-process support behavior. | ||
| */ | ||
| @Singleton | ||
| internal class SessionsFallbackActivityLifecycleCallbacks | ||
| @Inject | ||
| constructor( | ||
| private val sessionsSettings: SessionsSettings, | ||
| private val sessionGenerator: SessionGenerator, | ||
| private val timeProvider: TimeProvider, | ||
| @Background private val backgroundDispatcher: CoroutineContext, | ||
| ) : SessionLifecycleClient { | ||
|
|
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| override var localSessionData: SessionData = | ||
| SessionData( | ||
| sessionDetails = sessionGenerator.generateNewSession(null), | ||
| timeProvider.currentTime() | ||
| ) | ||
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| init { | ||
| notifySubscribers(localSessionData.sessionDetails.sessionId) | ||
| } | ||
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| override fun appBackgrounded() { | ||
| localSessionData = localSessionData.copy(backgroundTime = timeProvider.currentTime()) | ||
| } | ||
|
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| override fun appForegrounded() { | ||
| if (shouldInitiateNewSession(localSessionData)) { | ||
| val newSessionDetails = sessionGenerator.generateNewSession(localSessionData.sessionDetails) | ||
| localSessionData = localSessionData.copy(sessionDetails = newSessionDetails) | ||
| notifySubscribers(localSessionData.sessionDetails.sessionId) | ||
| } | ||
| } | ||
|
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| private fun notifySubscribers(sessionId: String) { | ||
| CoroutineScope(backgroundDispatcher).launch { | ||
| // Only notify subscriber for session change, not send to event to firelog | ||
| FirebaseSessionsDependencies.getRegisteredSubscribers().values.forEach { subscriber -> | ||
| subscriber.onSessionChanged(SessionSubscriber.SessionDetails(sessionId)) | ||
| Log.d( | ||
| TAG, | ||
| "Notified ${subscriber.sessionSubscriberName} of new session $sessionId with fallback mode" | ||
| ) | ||
| } | ||
| } | ||
| } | ||
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| private fun shouldInitiateNewSession(sessionData: SessionData): Boolean { | ||
| val interval = timeProvider.currentTime() - sessionData.backgroundTime | ||
| return interval > sessionsSettings.sessionRestartTimeout | ||
| } | ||
|
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| private companion object { | ||
| const val TAG = "SessionsFallbackALC" | ||
| } | ||
| } |
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var localSessionData: SessionData
private set()