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Deploy Java SDK in AWS Lambda

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Overview​

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:

    <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:

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

    • Modify the class declaration:

      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:

    @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:

      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.