com.amazonaws.serverless.proxy

Interface ExceptionHandler<ResponseType>

Type Parameters:

ResponseType - The type for the Lambda return value. Implementing sub-classes are required to return a valid instance of the response type.

All Known Implementing Classes:

AwsProxyExceptionHandler

public interface ExceptionHandler<ResponseType>

Implementing sub-classes of this interface are used by container objects to handle exceptions. Normally, exceptions are handled by the client applications directly within the container and a valid HTTP response is expected. This handler is used for exceptions thrown by the library while marshalling and unmarshalling requests and responses. The interface delcares two methods. A typed handle method for requests that are being proxied using a request and response type LambdaContainerHandler, and a stream-based handle method for Lambda's RequestStreamHandler.

See Also:

LambdaContainerHandler

Method Summary

Modifier and Type	Method and Description
ResponseType	handle(java.lang.Throwable ex) The handle method is called by the container object whenever an exception occurs in the proxy method for typed calls
void	handle(java.lang.Throwable ex, java.io.OutputStream stream) This handle implementation is called whenever an exception occurs in the stream-based proxy method.

Method Detail

handle

ResponseType handle(java.lang.Throwable ex)

The handle method is called by the container object whenever an exception occurs in the proxy method for typed calls

Parameters:

ex - The exception thrown by the application

Returns:

A valid response object

handle

void handle(java.lang.Throwable ex,
            java.io.OutputStream stream)
     throws java.io.IOException

This handle implementation is called whenever an exception occurs in the stream-based proxy method.

Parameters:

ex - The exception thrown by the application

stream - The OutputStream where the exception will be written

Throws:

java.io.IOException - When the exception handler fails to write to the OutputStream