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InputStream firebaseCredential = createFirebaseCredential();
this.storageOptions = StorageOptions.newBuilder()
                      .setProjectId(projectId)
                      .setCredentials(GoogleCredentials.fromStream(firebaseCredential))
                      .build();

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 IOUtils.toInputStream(jsonString);

Ikhiloya

 IOUtils.toInputStream(jsonString);

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ObjectMapper mapper = new ObjectMapper();
String jsonString = mapper.writeValueAsString(firebaseCredential);

Ikhiloya

FirebaseCredential firebaseCredential = new FirebaseCredential();
//private key
String privateKey = environment.getRequiredProperty("FIREBASE_PRIVATE_KEY").replace("\\n", "\n");
firebaseCredential.setType(environment.getRequiredProperty("FIREBASE_TYPE"));
firebaseCredential.setProject_id(projectId);
firebaseCredential.setPrivate_key_id("FIREBASE_PRIVATE_KEY_ID");
firebaseCredential.setPrivate_key(privateKey);
firebaseCredential.setClient_email(environment.getRequiredProperty("FIREBASE_CLIENT_EMAIL"));
firebaseCredential.setClient_id(environment.getRequiredProperty("FIREBASE_CLIENT_ID"));

Ikhiloya

FIREBASE_BUCKET_NAME=<add-the-value-from-service-account-file.json>
FIREBASE_PROJECT_ID=<add-the-value-from-service-account-file.json>
FIREBASE_TYPE=<add-the-value-from-service-account-file.json>
FIREBASE_PRIVATE_KEY_ID=<add-the-value-from-service-account-file.json>
FIREBASE_PRIVATE_KEY=<add-the-value-from-service-account-file.json>
FIREBASE_CLIENT_EMAIL=<add-the-value-from-service-account-file.json>
FIREBASE_CLIENT_ID=<add-the-value-from-service-account-file.json>
FIREBASE_AUTH_URI=<add-the-value-from-service-account-file.json>
FIREBASE_TOKEN_URI=<add-the-value-from-service-account-file.json>

Ikhiloya

public class FirebaseCredential {
    private String type;
    private String project_id;
    private String private_key_id;
    private String private_key;
    private String client_email;
    private String client_id;
    private String auth_uri;
    private String token_uri;
    private String auth_provider_x509_cert_url;

Ikhiloya

@Service
public class StorageFactory {
    private final Logger log = LoggerFactory.getLogger(StorageFactory.class);

    private final Environment environment;
    private final FirebaseStorageStrategy firebaseStorageStrategy;
    private final FileStorageStrategy fileStorageStrategy;

    public StorageFactory(Environment environment, FirebaseStorageStrategy firebaseStorageStrategy, FileStorageStrategy fileStorageStrategy) {
        this.environment = environment;

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@Service
public class FirebaseStorageStrategy implements StorageStrategy {
    private final Logger log = LoggerFactory.getLogger(FirebaseStorageStrategy.class);
    private final Environment environment;
    private StorageOptions storageOptions;
    private String bucketName;
    private String projectId;

    public FirebaseStorageStrategy(Environment environment) {
        this.environment = environment;

Ikhiloya

     
        String bucketName = environment.getRequiredProperty("FIREBASE_BUCKET_NAME");
        String projectId = environment.getRequiredProperty("FIREBASE_PROJECT_ID");
        FileInputStream serviceAccount =
                new FileInputStream("/home/user/Downloads/service-account-file.json");
        StorageOptions.newBuilder()
                .setProjectId(projectId)
                .setCredentials(GoogleCredentials.fromStream(serviceAccount))
                .build();