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FirebaseAppSnippets.java
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FirebaseAppSnippets.java
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/*
* Copyright 2018 Google Inc.
*
* 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.snippets;
import com.google.auth.oauth2.GoogleCredentials;
import com.google.firebase.FirebaseApp;
import com.google.firebase.FirebaseOptions;
import com.google.firebase.auth.FirebaseAuth;
import com.google.firebase.database.FirebaseDatabase;
import java.io.FileInputStream;
import java.io.IOException;
/**
* FirebaseApp initialization snippets for documentation.
*/
public class FirebaseAppSnippets {
public void initializeWithServiceAccount() throws IOException {
// [START initialize_sdk_with_service_account]
FileInputStream serviceAccount = new FileInputStream("path/to/serviceAccountKey.json");
FirebaseOptions options = FirebaseOptions.builder()
.setCredentials(GoogleCredentials.fromStream(serviceAccount))
.setDatabaseUrl("https://<DATABASE_NAME>.firebaseio.com/")
.build();
FirebaseApp.initializeApp(options);
// [END initialize_sdk_with_service_account]
}
public void initializeWithDefaultCredentials() throws IOException {
// [START initialize_sdk_with_application_default]
FirebaseOptions options = FirebaseOptions.builder()
.setCredentials(GoogleCredentials.getApplicationDefault())
.setDatabaseUrl("https://<DATABASE_NAME>.firebaseio.com/")
.build();
FirebaseApp.initializeApp(options);
// [END initialize_sdk_with_application_default]
}
public void initializeWithRefreshToken() throws IOException {
// [START initialize_sdk_with_refresh_token]
FileInputStream refreshToken = new FileInputStream("path/to/refreshToken.json");
FirebaseOptions options = FirebaseOptions.builder()
.setCredentials(GoogleCredentials.fromStream(refreshToken))
.setDatabaseUrl("https://<DATABASE_NAME>.firebaseio.com/")
.build();
FirebaseApp.initializeApp(options);
// [END initialize_sdk_with_refresh_token]
}
public void initializeWithDefaultConfig() {
// [START initialize_sdk_with_default_config]
FirebaseApp.initializeApp();
// [END initialize_sdk_with_default_config]
}
public void initializeDefaultApp() throws IOException {
FirebaseOptions defaultOptions = FirebaseOptions.builder()
.setCredentials(GoogleCredentials.getApplicationDefault())
.build();
// [START access_services_default]
// Initialize the default app
FirebaseApp defaultApp = FirebaseApp.initializeApp(defaultOptions);
System.out.println(defaultApp.getName()); // "[DEFAULT]"
// Retrieve services by passing the defaultApp variable...
FirebaseAuth defaultAuth = FirebaseAuth.getInstance(defaultApp);
FirebaseDatabase defaultDatabase = FirebaseDatabase.getInstance(defaultApp);
// ... or use the equivalent shorthand notation
defaultAuth = FirebaseAuth.getInstance();
defaultDatabase = FirebaseDatabase.getInstance();
// [END access_services_default]
}
public void initializeCustomApp() throws Exception {
FirebaseOptions defaultOptions = FirebaseOptions.builder()
.setCredentials(GoogleCredentials.getApplicationDefault())
.build();
FirebaseOptions otherAppConfig = FirebaseOptions.builder()
.setCredentials(GoogleCredentials.getApplicationDefault())
.build();
// [START access_services_nondefault]
// Initialize the default app
FirebaseApp defaultApp = FirebaseApp.initializeApp(defaultOptions);
// Initialize another app with a different config
FirebaseApp otherApp = FirebaseApp.initializeApp(otherAppConfig, "other");
System.out.println(defaultApp.getName()); // "[DEFAULT]"
System.out.println(otherApp.getName()); // "other"
// Use the shorthand notation to retrieve the default app's services
FirebaseAuth defaultAuth = FirebaseAuth.getInstance();
FirebaseDatabase defaultDatabase = FirebaseDatabase.getInstance();
// Use the otherApp variable to retrieve the other app's services
FirebaseAuth otherAuth = FirebaseAuth.getInstance(otherApp);
FirebaseDatabase otherDatabase = FirebaseDatabase.getInstance(otherApp);
// [END access_services_nondefault]
}
public void initializeWithServiceAccountId() throws IOException {
// [START initialize_sdk_with_service_account_id]
FirebaseOptions options = FirebaseOptions.builder()
.setCredentials(GoogleCredentials.getApplicationDefault())
.setServiceAccountId("my-client-id@my-project-id.iam.gserviceaccount.com")
.build();
FirebaseApp.initializeApp(options);
// [END initialize_sdk_with_service_account_id]
}
}