java-tutorials/aws-lambda/src/main/java/com/baeldung/lambda/LambdaRequestStreamHandler.java

package com.baeldung.lambda;

import com.amazonaws.services.lambda.runtime.Context;
import com.amazonaws.services.lambda.runtime.RequestStreamHandler;
import org.apache.commons.io.IOUtils;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

public class LambdaRequestStreamHandler implements RequestStreamHandler {

    public void handleRequest(InputStream inputStream, OutputStream outputStream, Context context) throws IOException {
        String input = IOUtils.toString(inputStream, "UTF-8");
        outputStream.write(("Hello World - " + input).getBytes());
    }
}