LambdaInvokeFunction.java - AWS Code Sample

LambdaInvokeFunction.java

LambdaInvoke.java demonstrates how to invoke an AWS Lambda function by using the AWSLambda object

/** * Copyright 2010-2020 Amazon.com, Inc. or its affiliates. All Rights Reserved. * * This file is licensed under the Apache License, Version 2.0 (the "License"). * You may not use this file except in compliance with the License. A copy of * the License is located at * * http://aws.amazon.com/apache2.0/ * * This file is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR * CONDITIONS OF ANY KIND, either express or implied. See the License for the * specific language governing permissions and limitations under the License. * */ package com.example.lambda ; import com.amazonaws.auth.profile.ProfileCredentialsProvider; import com.amazonaws.regions.Regions; import com.amazonaws.services.lambda.AWSLambda; import com.amazonaws.services.lambda.AWSLambdaClientBuilder; import com.amazonaws.services.lambda.model.InvokeRequest; import com.amazonaws.services.lambda.model.InvokeResult; import com.amazonaws.services.lambda.model.ServiceException; import java.nio.charset.StandardCharsets; public class LambdaInvokeFunction { public static void main(String[] args) { /* Function names appear as arn:aws:lambda:us-west-2:335556330391:function:HelloFunction you can retrieve the value by looking at the function in the AWS Console */ if (args.length < 1) { System.out.println("Please specify a function name"); System.exit(1); } String functionName = args[0]; InvokeRequest invokeRequest = new InvokeRequest() .withFunctionName(functionName) .withPayload("{\n" + " \"Hello \": \"Paris\",\n" + " \"countryCode\": \"FR\"\n" + "}"); InvokeResult invokeResult = null; try { AWSLambda awsLambda = AWSLambdaClientBuilder.standard() .withCredentials(new ProfileCredentialsProvider()) .withRegion(Regions.US_WEST_2).build(); invokeResult = awsLambda.invoke(invokeRequest); String ans = new String(invokeResult.getPayload().array(), StandardCharsets.UTF_8); //write out the return value System.out.println(ans); } catch (ServiceException e) { System.out.println(e); } System.out.println(invokeResult.getStatusCode()); } }

Sample Details

Service: Lambda

Last tested: 2019-11-19

Author: AWS-scmacdon

Type: full-example