How to use get_lambda_callable method in localstack

Best Python code snippet using localstack_python

lambda_executors.py

Source:lambda_executors.py

...1146            environment["AWS_LAMBDA_FUNCTION_INVOKED_ARN"] = context.invoked_function_arn1147            environment["AWS_LAMBDA_FUNCTION_MEMORY_SIZE"] = str(context.memory_limit_in_mb)1148        # execute the Lambda function in a forked sub-process, sync result via queue1149        queue = Queue()1150        lambda_function_callable = self.get_lambda_callable(1151            lambda_function, qualifier=inv_context.function_version1152        )1153        def do_execute():1154            # now we're executing in the child process, safe to change CWD and ENV1155            result = None1156            try:1157                if lambda_cwd:1158                    os.chdir(lambda_cwd)1159                    sys.path.insert(0, "")1160                if environment:1161                    os.environ.update(environment)1162                # set default env variables required for most Lambda handlers1163                self.set_default_env_variables()1164                # run the actual handler function1165                result = lambda_function_callable(inv_context.event, context)1166            except Exception as e:1167                result = str(e)1168                sys.stderr.write("%s %s" % (e, traceback.format_exc()))1169                raise1170            finally:1171                queue.put(result)1172        process = Process(target=do_execute)1173        start_time = now(millis=True)1174        error = None1175        with CaptureOutput() as c:1176            try:1177                process.run()1178            except Exception as e:1179                error = e1180        result = queue.get()1181        end_time = now(millis=True)1182        # Make sure to keep the log line below, to ensure the log stream gets created1183        request_id = long_uid()1184        log_output = 'START %s: Lambda %s started via "local" executor ...' % (1185            request_id,1186            lambda_function.arn(),1187        )1188        # TODO: Interweaving stdout/stderr currently not supported1189        for stream in (c.stdout(), c.stderr()):1190            if stream:1191                log_output += ("\n" if log_output else "") + stream1192        if isinstance(result, InvocationResult) and result.log_output:1193            log_output += "\n" + result.log_output1194        log_output += "\nEND RequestId: %s" % request_id1195        log_output += "\nREPORT RequestId: %s Duration: %s ms" % (1196            request_id,1197            int((end_time - start_time) * 1000),1198        )1199        # store logs to CloudWatch1200        store_lambda_logs(lambda_function, log_output)1201        result = result.result if isinstance(result, InvocationResult) else result1202        if error:1203            LOG.info(1204                'Error executing Lambda "%s": %s %s',1205                lambda_function.arn(),1206                error,1207                "".join(traceback.format_tb(error.__traceback__)),1208            )1209            result = json.dumps(1210                {1211                    "errorType": error.__class__.__name__,1212                    "errorMessage": error.args[0],1213                    "stackTrace": traceback.format_tb(error.__traceback__),1214                }1215            )1216            raise InvocationException(result, log_output=log_output, result=result)1217        # construct final invocation result1218        invocation_result = InvocationResult(result, log_output=log_output)1219        # run plugins post-processing logic1220        invocation_result = self.process_result_via_plugins(inv_context, invocation_result)1221        return invocation_result1222    def provide_file_to_lambda(self, local_file: str, inv_context: InvocationContext) -> str:1223        # This is a no-op for local executors - simply return the given local file path1224        return local_file1225    def execute_java_lambda(1226        self, event, context, main_file, lambda_function: LambdaFunction = None1227    ) -> InvocationResult:1228        lambda_function.envvars = lambda_function.envvars or {}1229        java_opts = config.LAMBDA_JAVA_OPTS or ""1230        handler = lambda_function.handler1231        lambda_function.envvars[LAMBDA_HANDLER_ENV_VAR_NAME] = handler1232        event_file = EVENT_FILE_PATTERN.replace("*", short_uid())1233        save_file(event_file, json.dumps(json_safe(event)))1234        TMP_FILES.append(event_file)1235        classpath = "%s:%s:%s" % (1236            main_file,1237            Util.get_java_classpath(main_file),1238            LAMBDA_EXECUTOR_JAR,1239        )1240        cmd = "java %s -cp %s %s %s" % (1241            java_opts,1242            classpath,1243            LAMBDA_EXECUTOR_CLASS,1244            event_file,1245        )1246        # apply plugin patches1247        inv_context = InvocationContext(1248            lambda_function, event, environment=lambda_function.envvars, lambda_command=cmd1249        )1250        result = self.apply_plugin_patches(inv_context)1251        if isinstance(result, InvocationResult):1252            return result1253        cmd = inv_context.lambda_command1254        LOG.info(cmd)1255        # execute Lambda and get invocation result1256        invocation_result = self._execute_in_custom_runtime(cmd, lambda_function=lambda_function)1257        return invocation_result1258    def execute_javascript_lambda(1259        self, event, context, main_file, lambda_function: LambdaFunction = None1260    ):1261        handler = lambda_function.handler1262        function = handler.split(".")[-1]1263        event_json_string = "%s" % (json.dumps(json_safe(event)) if event else "{}")1264        context_json_string = "%s" % (json.dumps(context.__dict__) if context else "{}")1265        cmd = [1266            "node",1267            "-e",1268            f'const res = require("{main_file}").{function}({event_json_string},{context_json_string}); '1269            f"const log = (rs) => console.log(JSON.stringify(rs)); "1270            "res && res.then ? res.then(r => log(r)) : log(res)",1271        ]1272        LOG.info(cmd)1273        result = self._execute_in_custom_runtime(cmd, lambda_function=lambda_function)1274        return result1275    def execute_go_lambda(self, event, context, main_file, lambda_function: LambdaFunction = None):1276        if lambda_function:1277            lambda_function.envvars["AWS_LAMBDA_FUNCTION_HANDLER"] = main_file1278            lambda_function.envvars["AWS_LAMBDA_EVENT_BODY"] = json.dumps(json_safe(event))1279        else:1280            LOG.warning("Unable to get function details for local execution of Golang Lambda")1281        cmd = GO_LAMBDA_RUNTIME1282        LOG.debug("Running Golang Lambda with runtime: %s", cmd)1283        result = self._execute_in_custom_runtime(cmd, lambda_function=lambda_function)1284        return result1285    @staticmethod1286    def set_default_env_variables():1287        # set default env variables required for most Lambda handlers1288        default_env_vars = {"AWS_DEFAULT_REGION": aws_stack.get_region()}1289        env_vars_before = {var: os.environ.get(var) for var in default_env_vars}1290        os.environ.update({k: v for k, v in default_env_vars.items() if not env_vars_before.get(k)})1291        return env_vars_before1292    @staticmethod1293    def reset_default_env_variables(env_vars_before):1294        for env_name, env_value in env_vars_before.items():1295            env_value_before = env_vars_before.get(env_name)1296            os.environ[env_name] = env_value_before or ""1297            if env_value_before is None:1298                os.environ.pop(env_name, None)1299    @classmethod1300    def get_lambda_callable(cls, function: LambdaFunction, qualifier: str = None) -> Callable:1301        """Returns the function Callable for invoking the given function locally"""1302        qualifier = function.get_qualifier_version(qualifier)1303        func_dict = cls.FUNCTION_CALLABLES.get(function.arn()) or {}1304        # TODO: function versioning and qualifiers should be refactored and designed properly!1305        callable = func_dict.get(qualifier) or func_dict.get(LambdaFunction.QUALIFIER_LATEST)1306        if not callable:1307            raise Exception(1308                f"Unable to find callable for Lambda function {function.arn()} - {qualifier}"1309            )1310        return callable1311    @classmethod1312    def add_function_callable(cls, function: LambdaFunction, lambda_handler: Callable):1313        """Sets the function Callable for invoking the $LATEST version of the Lambda function."""1314        func_dict = cls.FUNCTION_CALLABLES.setdefault(function.arn(), {})...

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