Add early / late init

Author: samedson

firebase-sessions/src/main/kotlin/com/google/firebase/sessions/EventGDTLogger.kt

@@ -18,6 +18,7 @@ package com.google.firebase.sessions
 
 import com.google.android.datatransport.*
 import com.google.android.datatransport.TransportFactory
+import com.google.firebase.inject.Provider
 
 /**
  * The [EventGDTLoggerInterface] is for testing purposes so that we can mock EventGDTLogger in other
@@ -35,12 +36,12 @@ internal interface EventGDTLoggerInterface {
  *
  * @hide
  */
-internal class EventGDTLogger(private val transportFactory: TransportFactory) :
+internal class EventGDTLogger(private val transportFactoryProvider: Provider<TransportFactory>) :
   EventGDTLoggerInterface {
 
   // Logs a [SessionEvent] to FireLog
   override fun log(sessionEvent: SessionEvent) {
-    transportFactory
+    transportFactoryProvider.get()
       .getTransport(
         EventGDTLogger.AQS_LOG_SOURCE,
         SessionEvent::class.java,

firebase-sessions/src/main/kotlin/com/google/firebase/sessions/FirebaseSessions.kt

@@ -21,6 +21,7 @@ import android.util.Log
 import androidx.annotation.Discouraged
 import com.google.android.datatransport.TransportFactory
 import com.google.firebase.FirebaseApp
+import com.google.firebase.inject.Provider
 import com.google.firebase.installations.FirebaseInstallationsApi
 import com.google.firebase.ktx.Firebase
 import com.google.firebase.ktx.app
@@ -31,10 +32,10 @@ internal constructor(
   private val firebaseApp: FirebaseApp,
   firebaseInstallations: FirebaseInstallationsApi,
   backgroundDispatcher: CoroutineDispatcher,
-  transportFactory: TransportFactory,
+  transportFactoryProvider: Provider<TransportFactory>,
 ) {
   private val sessionGenerator = SessionGenerator(collectEvents = true)
-  private val eventGDTLogger = EventGDTLogger(transportFactory)
+  private val eventGDTLogger = EventGDTLogger(transportFactoryProvider)
   private val sessionCoordinator =
     SessionCoordinator(firebaseInstallations, backgroundDispatcher, eventGDTLogger)
 

firebase-sessions/src/main/kotlin/com/google/firebase/sessions/FirebaseSessionsEarly.kt

@@ -0,0 +1,26 @@
+/*
+ * Copyright 2023 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.
+ */
+
+package com.google.firebase.sessions
+
+/**
+ * The Firebase Sessions early initialization.
+ *
+ * TODO: This should handle generating the Session ID and communicating with subscribers.
+ *
+ * @hide
+ */
+class FirebaseSessionsEarly {}

firebase-sessions/src/main/kotlin/com/google/firebase/sessions/FirebaseSessionsRegistrar.kt

@@ -18,9 +18,7 @@ import androidx.annotation.Keep
 import com.google.android.datatransport.TransportFactory
 import com.google.firebase.FirebaseApp
 import com.google.firebase.annotations.concurrent.Background
-import com.google.firebase.components.Component
-import com.google.firebase.components.ComponentRegistrar
-import com.google.firebase.components.Dependency
+import com.google.firebase.components.*
 import com.google.firebase.components.Qualified.qualified
 import com.google.firebase.components.Qualified.unqualified
 import com.google.firebase.installations.FirebaseInstallationsApi
@@ -36,28 +34,40 @@ import kotlinx.coroutines.CoroutineDispatcher
 internal class FirebaseSessionsRegistrar : ComponentRegistrar {
   override fun getComponents() =
     listOf(
+      Component.builder(firebaseSessionsEarly)
+        .name(EARLY_LIBRARY_NAME)
+        .factory { _ ->
+          FirebaseSessionsEarly()
+        }
+        .eagerInDefaultApp()
+        .build(),
+
       Component.builder(FirebaseSessions::class.java)
         .name(LIBRARY_NAME)
+        .add(Dependency.required(firebaseSessionsEarly))
         .add(Dependency.required(firebaseApp))
         .add(Dependency.required(firebaseInstallationsApi))
         .add(Dependency.required(backgroundDispatcher))
         .add(Dependency.requiredProvider(transportFactory))
         .factory { container ->
+          // Make sure FirebaseSessionsEarly has started up
+          container.get(firebaseSessionsEarly)
           FirebaseSessions(
             container.get(firebaseApp),
             container.get(firebaseInstallationsApi),
             container.get(backgroundDispatcher),
-            container.getProvider(transportFactory).get(),
+            container.getProvider(transportFactory),
           )
         }
-        .eagerInDefaultApp()
         .build(),
       LibraryVersionComponent.create(LIBRARY_NAME, BuildConfig.VERSION_NAME)
     )
 
   companion object {
     private const val LIBRARY_NAME = "fire-sessions"
+    private const val EARLY_LIBRARY_NAME = "fire-sessions-early"
 
+    private val firebaseSessionsEarly = unqualified(FirebaseSessionsEarly::class.java)
     private val firebaseApp = unqualified(FirebaseApp::class.java)
     private val firebaseInstallationsApi = unqualified(FirebaseInstallationsApi::class.java)
     private val backgroundDispatcher =