Firebase Auth 未在 spring 启动时初始化

Question

我在 spring 启动应用程序中使用 firebase admin sdk。 （API 应用程序）

当我 运行 在本地使用 intelliJ 时，它工作正常。但是当部署在 tomcat 时，它给了我 NPE。

在Springboot应用中

 public static void main(String[] args) {
    SpringApplication.run(InfanoApplication.class, args);

    try {
        ClassLoader classloader = Thread.currentThread().getContextClassLoader();

        File file = new File(classloader.getResource("firebase2.json").getFile());
        logger.info("FILE PATH : " + file.getAbsolutePath());
        FileInputStream serviceAccount = new FileInputStream(file.getAbsolutePath());

        FirebaseOptions options = new FirebaseOptions.Builder()
                .setCredentials(GoogleCredentials.fromStream(serviceAccount))
                .setDatabaseUrl(FB_BASE_URL)
                .build();

        firebaseApp = FirebaseApp.initializeApp(options);
        logger.info("FIREBASE NAME : "+firebaseApp.getName());
    } catch (IOException e) {
        e.printStackTrace();
    }
}

在API代码中

userRecord = FirebaseAuth.getInstance(InfanoApplication.firebaseApp).getUserByPhoneNumber(mobile);

错误：

java.lang.NullPointerException
at com.google.firebase.ImplFirebaseTrampolines.getService(ImplFirebaseTrampolines.java:62)
at com.google.firebase.auth.FirebaseAuth.getInstance(FirebaseAuth.java:101)

谁能帮忙解决这个问题。提前谢谢你。

Answer 1

您不应该在 main 方法中创建这样的 Firebase 实例。可能在正确的类路径中找不到您的服务帐户。我会创建一个 Spring Configuration，它会在应用程序启动时创建一个 Firebase 应用程序。我将我的服务帐户保存在 资源文件夹 .

的 根目录中

@Configuration
public class FirebaseConfig {

    //TODO: In your case maybe something else
    @Value(value = "classpath:serviceAccount.json")
    private Resource serviceAccountResource;

    @Bean
    public FirebaseApp createFireBaseApp() throws IOException {
        InputStream serviceAccount = serviceAccountResource.getInputStream();

        FirebaseOptions options = new FirebaseOptions.Builder()
                .setCredentials(GoogleCredentials.fromStream(serviceAccount))
                .setDatabaseUrl("<db-url>")
                .setStorageBucket("<storage-url>")
                .build();

        //Add loggers
        System.out.println("Firebase config initialized");

        return FirebaseApp.initializeApp(options);
    }

    
    @Bean
    @DependsOn(value = "createFireBaseApp")
    public StorageClient createFirebaseStorage() {
        return StorageClient.getInstance();
    }

    @Bean
    @DependsOn(value = "createFireBaseApp")
    public FirebaseAuth createFirebaseAuth() {
        return FirebaseAuth.getInstance();
    }

    @Bean
    @DependsOn(value = "createFireBaseApp")
    public FirebaseDatabase createFirebaseDatabase() {
        return FirebaseDatabase.getInstance();
    }

    @Bean
    @DependsOn(value = "createFireBaseApp")
    public FirebaseMessaging createFirebaseMessaging() {
        return FirebaseMessaging.getInstance();
    }
}

现在，如果我想在我的任何服务中使用 Firebase Auth 类，我只需执行以下操作：

@Service
class MyService {

    @Autowired
    private FirebaseAuth firebaseAuth;

    //TODO: Probably should have return type
    public void findUser(String mobile) {
        firebaseAuth.getUserByPhoneNumber(mobile);
    }
}