me.ccampo.spring.aws.lambda

Class JacksonSpringRequestHandler<I,O>

java.lang.Object

me.ccampo.spring.aws.lambda.SpringRequestStreamHandler

me.ccampo.spring.aws.lambda.JacksonSpringRequestHandler<I,O>

Type Parameters:

I - the input type parameter

O - the output type parameter

All Implemented Interfaces:

com.amazonaws.services.lambda.runtime.RequestStreamHandler, ApplicationContextProvider

public abstract class JacksonSpringRequestHandler<I,O>
extends SpringRequestStreamHandler

Lambda does JSON parsing behind the scenes, but it can be a little restrictive. This class allows you to provide a custom configured ObjectMapper which can handle any special JSON parsing behavior.

To make use of this class, implement the ApplicationContextProvider.getApplicationContext() method to provide a Spring ApplicationContext, and then register a bean of type RequestHandler with the same type parameters.

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	JacksonSpringRequestHandler(java.lang.Class<I> inputClass) To work around type erasure, pass the input type class here.

Method Summary

Modifier and Type	Method and Description
protected abstract com.fasterxml.jackson.databind.ObjectMapper	getObjectMapper() Must be implemented to return the ObjectMapper to be used in serialization/deserialization.
void	handleRequest(java.io.InputStream input, java.io.OutputStream output, com.amazonaws.services.lambda.runtime.Context context)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface me.ccampo.spring.aws.lambda.ApplicationContextProvider

getApplicationContext

Constructor Detail

JacksonSpringRequestHandler

protected JacksonSpringRequestHandler(@NotNull
                                      java.lang.Class<I> inputClass)

To work around type erasure, pass the input type class here. AWS Lambda requires a no-arg constructor for their handler classes however, so be sure to provide one while calling this constructor in it.

Parameters:

inputClass - the class of this class's input type parameter, I.

Method Detail

getObjectMapper

protected abstract com.fasterxml.jackson.databind.ObjectMapper getObjectMapper()

Must be implemented to return the ObjectMapper to be used in serialization/deserialization.

handleRequest

public void handleRequest(@NotNull
                          java.io.InputStream input,
                          @NotNull
                          java.io.OutputStream output,
                          @NotNull
                          com.amazonaws.services.lambda.runtime.Context context)
                   throws java.io.IOException

Specified by:

handleRequest in interface com.amazonaws.services.lambda.runtime.RequestStreamHandler

Overrides:

handleRequest in class SpringRequestStreamHandler

Throws:

java.io.IOException