Can not resolve FirebaseOptions using latest Firebase SDK dependency

Question

I am trying to integrate my spring-boot rest api with Firebase by these following tutorial: savicprvoslav

I need to verify the userTokenId using Firebase SDK which is generated by a front end application.

The above git guide used

<dependency>
            <groupId>com.google.firebase</groupId>
            <artifactId>firebase-server-sdk</artifactId>
            <version>3.0.3</version>
        </dependency>

which is already deprecated and suggesting to use latest Firebase SDK [ maven repository]

According to the Firebase SDK integration guide we should use

<dependency>
            <groupId>com.google.firebase</groupId>
            <artifactId>firebase-admin</artifactId>
            <version>5.4.0</version>
        </dependency>

Old practice:

InputStream inputStream = FirebaseConfig.class.getClassLoader().getResourceAsStream(configPath);

        FirebaseOptions options = new FirebaseOptions.Builder().setServiceAccount(inputStream)
                .setDatabaseUrl(databaseUrl).build();

New Practice:

FileInputStream serviceAccount = new FileInputStream("path/to/serviceAccountKey.json");

FirebaseOptions options = new FirebaseOptions.Builder()
  .setCredentials(GoogleCredentials.fromStream(serviceAccount))
  .setDatabaseUrl("https://<DATABASE_NAME>.firebaseio.com/")
  .build();

I have tried to use it (removed the old one) but it failed to resolve lots of dependencies like FirebaseOption which can only resolved by old maven dependencies(firebase-server-sdk 3.0.3)

I am really very confused ! Can not find any updated example project. A sample project will very helpful (example code which initialize the firebase sdk ) .

Can anybody help?

Thanks in advnace

Answer 1

Fortunately Firebase has updated their documentation and now suggesting these below maven configuraiton , which resolved the problem perfectly. I think it was a outdated documentation issue.

<dependency>
  <groupId>com.google.firebase</groupId>
  <artifactId>firebase-admin</artifactId>
  <version>5.5.0</version>
</dependency>

Please follow this link Firebase SDK Installation guide

In addition , if you are behind corporate proxy, you need to set proxy like this:

System.setProperty("https.proxyHost", "your_proxy_host");
System.setProperty("https.proxyPort", "your_proxy_port");

so complete code to initialize Firebase instance is:

 URL fileUrl = FirebaseConfig.class.getClassLoader().getResource(configPath);
FileInputStream fisTargetFile = new FileInputStream(fileUrl.getFile());
System.setProperty("https.proxyHost", "your_proxy_host");
System.setProperty("https.proxyPort", "your_proxy_port");
    FirebaseOptions options = new FirebaseOptions.Builder()
            .setCredentials(GoogleCredentials.fromStream(fisTargetFile))
            .setDatabaseUrl(databaseUrl)
            .build();
    FirebaseApp.initializeApp(options);

Hope it will be helpful to others.