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How to use get_java_handler method in localstack

Best Python code snippet using localstack_python

lambda_api.py

Source:lambda_api.py

...329        zip_file_content = base64.b64decode(zip_file_content)330    else:331        return error_response('No valid Lambda archive specified.', 400)332    return zip_file_content333def get_java_handler(zip_file_content, handler, main_file):334    """Creates a Java handler from an uploaded ZIP or JAR.335    :type zip_file_content: bytes336    :param zip_file_content: ZIP file bytes.337    :type handler: str338    :param handler: The lambda handler path.339    :type main_file: str340    :param main_file: Filepath to the uploaded ZIP or JAR file.341    :returns: function or flask.Response342    """343    if not is_jar_archive(zip_file_content):344        with zipfile.ZipFile(BytesIO(zip_file_content)) as zip_ref:345            jar_entries = [e for e in zip_ref.infolist() if e.filename.endswith('.jar')]346            if len(jar_entries) != 1:347                raise Exception('Expected exactly one *.jar entry in zip file, found %s' % len(jar_entries))348            zip_file_content = zip_ref.read(jar_entries[0].filename)349            LOG.info('Found jar file %s with %s bytes in Lambda zip archive' %350                     (jar_entries[0].filename, len(zip_file_content)))351            main_file = new_tmp_file()352            save_file(main_file, zip_file_content)353    if is_jar_archive(zip_file_content):354        def execute(event, context):355            result, log_output = lambda_executors.EXECUTOR_LOCAL.execute_java_lambda(356                event, context, handler=handler, main_file=main_file)357            return result358        return execute359    return error_response(360        'Unable to extract Java Lambda handler - file is not a valid zip/jar files', 400, error_type='ValidationError')361def set_function_code(code, lambda_name):362    def generic_handler(event, context):363        raise Exception(('Unable to find executor for Lambda function "%s". ' +364            'Note that Node.js and .NET Core Lambdas currently require LAMBDA_EXECUTOR=docker') % lambda_name)365    lambda_cwd = None366    arn = func_arn(lambda_name)367    runtime = arn_to_lambda[arn].runtime368    handler_name = arn_to_lambda.get(arn).handler369    lambda_environment = arn_to_lambda.get(arn).envvars370    if not handler_name:371        handler_name = LAMBDA_DEFAULT_HANDLER372    # Stop/remove any containers that this arn uses.373    LAMBDA_EXECUTOR.cleanup(arn)374    # Save the zip file to a temporary file that the lambda executors can reference.375    zip_file_content = get_zip_bytes(code)376    if isinstance(zip_file_content, Response):377        return zip_file_content378    tmp_dir = '%s/zipfile.%s' % (config.TMP_FOLDER, short_uid())379    mkdir(tmp_dir)380    tmp_file = '%s/%s' % (tmp_dir, LAMBDA_ZIP_FILE_NAME)381    save_file(tmp_file, zip_file_content)382    TMP_FILES.append(tmp_dir)383    lambda_cwd = tmp_dir384    # Set the appropriate lambda handler.385    lambda_handler = generic_handler386    if runtime == LAMBDA_RUNTIME_JAVA8:387        # The Lambda executors for Docker subclass LambdaExecutorContainers,388        # which runs Lambda in Docker by passing all *.jar files in the function389        # working directory as part of the classpath. Because of this, we need to390        # save the zip_file_content as a .jar here.391        if is_jar_archive(zip_file_content):392            jar_tmp_file = '{working_dir}/{file_name}'.format(393                working_dir=tmp_dir, file_name=LAMBDA_JAR_FILE_NAME)394            save_file(jar_tmp_file, zip_file_content)395        lambda_handler = get_java_handler(zip_file_content, handler_name, tmp_file)396        if isinstance(lambda_handler, Response):397            return lambda_handler398    else:399        handler_file = get_handler_file_from_name(handler_name, runtime=runtime)400        handler_function = get_handler_function_from_name(handler_name, runtime=runtime)401        # Lambda code must be uploaded in the Zip format.402        if not is_zip_file(zip_file_content):403            raise Exception(404                'Uploaded Lambda code for runtime ({}) is not in Zip format'.format(runtime))405        unzip(tmp_file, tmp_dir)406        main_file = '%s/%s' % (tmp_dir, handler_file)407        if os.path.isfile(main_file):408            # make sure the file is actually readable, then read contents409            ensure_readable(main_file)...

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