com.amazonaws.serverless.proxy.internal

Class ResponseWriter<ContainerResponseType,ResponseType>

java.lang.Object

com.amazonaws.serverless.proxy.internal.ResponseWriter<ContainerResponseType,ResponseType>

Type Parameters:

ContainerResponseType - The response object expceted from the underlying container

ResponseType - The type for the Lambda function return value

Direct Known Subclasses:

AwsProxyHttpServletResponseWriter

public abstract class ResponseWriter<ContainerResponseType,ResponseType>
extends Object

Implementations of this object are used by the container to transform the container's response object into a valid return type for the AWS Lambda function. The ContainerResponseType type could be a response model object or a ResponseReader implementation. For example, the Jersey library passes the response reader object to the default implementation of this class.

Constructor Summary

Constructors

Constructor and Description
ResponseWriter()

Method Summary

Modifier and Type	Method and Description
protected boolean	isValidUtf8(byte[] input) Checks whether the given byte array contains a UTF-8 encoded string
protected abstract ResponseType	writeResponse(ContainerResponseType containerResponse, com.amazonaws.services.lambda.runtime.Context lambdaContext) Writes status code, headers, and body from the container response to a Lambda return value.

Methods inherited from class java.lang.Object

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

Constructor Detail

ResponseWriter

public ResponseWriter()

Method Detail

writeResponse

protected abstract ResponseType writeResponse(ContainerResponseType containerResponse,
                                              com.amazonaws.services.lambda.runtime.Context lambdaContext)
                                       throws InvalidResponseObjectException

Writes status code, headers, and body from the container response to a Lambda return value.

Parameters:

containerResponse - The container response or response reader object

lambdaContext - The context for the Lambda function execution

Returns:

A valid return value for the Lambda function

Throws:

InvalidResponseObjectException - When the implementation cannot read the container response object

isValidUtf8

protected boolean isValidUtf8(byte[] input)

Checks whether the given byte array contains a UTF-8 encoded string

Parameters:

input - The byte[] to check against

Returns:

true if the contend is valid UTF-8, false otherwise