java - what wrong with my AWS Lambda creating project? -

hey downloaed tools aws toolkit required eclipse, , new im trying create new aws lambda project , give package, project name , change input type custom provide string input type , out type, after loading creates project comes errors so, please can tell 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 hanlerequest states multiple markers @ line     - method handlerequest(string, context) of type lambdafunctionhandler must override superclass method     - implements   {         context.getlogger().log("input: " + input);          // todo: implement handler         return null;     }  }   } 

the aws documentation outdated.

you need implement different interface.

passing map:

public class myhandler implements requesthandler<map<string,object>,string>  

passing custom pojo object:

public class myhandler implements requesthandler<customrequest,customresponse> { 

consuming stream:

public class myhandler implements requeststreamhandler { 

make sure grab right dependency:

<dependency>     <groupid>com.amazonaws</groupid>     <artifactid>aws-lambda-java-core</artifactid>     <version>1.1.0</version> </dependency> 

i developed sample application implementing each of interfaces. can clone github. 1 of handlers print out available environment variables well.

lambda expects json input.