what wrong with my AWS Lambda creating project?

Question

Hey so I downloaed all the tools for AWS toolkit required for eclipse, and new im trying to create A new AWS lambda project and I give it a package, project name and change input type to custom then provide String for input type and out Type, after loading it creates a project but comes back with errors so, please can some tell my what's wrong??

package com.amazonaws.lambda.demo;

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

public class LambdaFunctionHandler implements RequestHandler<String, String> {

    @Override
    public String handleRequest(String input, Context context) // error is this hanleRequest it states Multiple markers at this line
    - The method handleRequest(String, Context) of type LambdaFunctionHandler must override a superclass method
    - implements   {
        context.getLogger().log("Input: " + input);

        // TODO: implement your handler
        return null;
    }

}


}

Answer 1

The AWS documentation is outdated.

You need to implement a different interface.

Passing a map:

public class MyHandler implements RequestHandler<Map<String,Object>,String> 

Passing into a custom POJO object:

public class MyHandler implements RequestHandler<CustomRequest,CustomResponse> {

Consuming a stream:

public class MyHandler implements RequestStreamHandler {

Make sure to grab the right dependency:

<dependency>
    <groupId>com.amazonaws</groupId>
    <artifactId>aws-lambda-java-core</artifactId>
    <version>1.1.0</version>
</dependency>

I developed a sample application implementing each of the interfaces. You can just clone it from github . One of the handlers will print out all available environment variables as well.

Lambda expects JSON as input.