Deploy Java SDK in AWS Lambda

This page provides information on how to deploy Java SDK code in AWS Lambda services.

Before you begin

• Use similar Java SDK code as in the Java SDK example.

• AWS Lambda supports Java 8 runtime only, so ensure you use JDK 1.8.

Step-by-step Guide

1. Add AWS Lambda dependency

   In the pom.xml file of the downloaded project, add the following inside the <dependencies> block:

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   <dependency>
   <groupId>com.amazonaws</groupId>
   <artifactId>aws-lambda-java-core</artifactId>
   <version>1.0.0</version>
   </dependency>

2. Update your Java class

   • Open SplitSDK_Sample.java

   • Add these imports at the top:

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     import com.amazonaws.services.lambda.runtime.Context;
     import com.amazonaws.services.lambda.runtime.RequestHandler;

   • Modify the class declaration:

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     public class SplitSDK_Sample implements RequestHandler<Object, String> {

3. Move your main method code into handleRequest

   Replace the main method code with the following handleRequest method:

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   @Override
   public String handleRequest(Object input, Context context) {
      String myinput = input.toString();
      System.out.print("Input: " + myinput + "\n\n");
      HashMap<String, String> mapInput = (HashMap<String, String>) input;
      String userId = mapInput.get("key1");
      String treatment = "";
      try {
         MySplit split = new MySplit("API KEY");
         treatment = split.GetSplitTreatment(userId, "Split Name");             
         System.out.print("Treatment: " + treatment + "\n\n");
         split.Destroy();
      } catch (Exception e) {
         System.out.print("Exception: " + e.getMessage());
      }
      return treatment;
   }

4. Build your project

   • In Eclipse, select Project → Build Project, and ensure no build errors.

   • Right-click your project in Project Explorer → Export.

     
   • Choose Runnable JAR file → Next.

     
   • Specify JAR location and name.

   • Select Extract required libraries into generated JAR → Finish.

   
5. Deploy to AWS Lambda

   

   • Login to AWS Console

   • Go to Lambda → Functions

   • Click Create function

   • Choose Author from scratch

   • Select Java 8 runtime

   • Give your function a name

   • Click Create function

   • Under Function code, upload your generated JAR file and save.

     
6. Configure test event

   

   • In the Lambda console, select Configure test events

   • Use the Hello World template

   • Set a value for key1 that matches the user ID your Lambda function will use.

   • Name and create the event

   
7. Set Lambda handler

   • In the Function code section, set the handler to:

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     sample.SplitSDK_Sample::handleRequest

     
   • Click Save.

8. Test your Lambda function

   

   • Click Test.

   • You should see the expected treatment value as output.

   • Logs will show debug information.

Download the example project.