How to use

fromStream

method

in

com.google.auth.oauth2.ServiceAccountJwtAccessCredentials

/**
 * Returns credentials defined by a Service Account key file in JSON format from the Google
 * Developers Console.
 *
 * @param credentialsStream the stream with the credential definition.
 * @return the credential defined by the credentialsStream.
 * @throws IOException if the credential cannot be created from the stream.
 **/
public static ServiceAccountJwtAccessCredentials fromStream(InputStream credentialsStream)
  throws IOException {
 return fromStream(credentialsStream, null);
}

/**
 * Returns credentials defined by a Service Account key file in JSON format from the Google
 * Developers Console.
 *
 * @param credentialsStream the stream with the credential definition.
 * @return the credential defined by the credentialsStream.
 * @throws IOException if the credential cannot be created from the stream.
 **/
public static ServiceAccountJwtAccessCredentials fromStream(InputStream credentialsStream)
  throws IOException {
 return fromStream(credentialsStream, null);
}

 private static void testFromStreamException(InputStream stream, String expectedMessageContent) {
  try {
   ServiceAccountJwtAccessCredentials.fromStream(stream, CALL_URI);
   fail(String.format("Should throw exception with message containing '%s'",
     expectedMessageContent));
  } catch (IOException expected) {
   assertTrue(expected.getMessage().contains(expectedMessageContent));
  }
 }
}

@Test
public void fromStream_defaultURI_hasJwtAccess() throws IOException {
 InputStream serviceAccountStream = ServiceAccountCredentialsTest
   .writeServiceAccountStream(
     SA_CLIENT_ID, SA_CLIENT_EMAIL, SA_PRIVATE_KEY_PKCS8, SA_PRIVATE_KEY_ID);
 Credentials credentials =
   ServiceAccountJwtAccessCredentials.fromStream(serviceAccountStream, CALL_URI);
 assertNotNull(credentials);
 Map<String, List<String>> metadata = credentials.getRequestMetadata(null);
 verifyJwtAccess(metadata, SA_CLIENT_EMAIL, CALL_URI, SA_PRIVATE_KEY_ID);
}

@Test
public void fromStream_hasJwtAccess() throws IOException {
 InputStream serviceAccountStream = ServiceAccountCredentialsTest
   .writeServiceAccountStream(
     SA_CLIENT_ID, SA_CLIENT_EMAIL, SA_PRIVATE_KEY_PKCS8, SA_PRIVATE_KEY_ID);
 Credentials credentials =
   ServiceAccountJwtAccessCredentials.fromStream(serviceAccountStream);
 assertNotNull(credentials);
 Map<String, List<String>> metadata = credentials.getRequestMetadata(CALL_URI);
 verifyJwtAccess(metadata, SA_CLIENT_EMAIL, CALL_URI, SA_PRIVATE_KEY_ID);
}