javax.servlet

Interface WriteListener

All Superinterfaces:

EventListener

public interface WriteListener
extends EventListener

Callback notification mechanism that signals to the developer it's possible to write content without blocking.

Since:

Servlet 3.1

Method Summary

Modifier and Type	Method and Description
void	onError(Throwable t) Invoked when an error occurs writing data using the non-blocking APIs.
void	onWritePossible() When an instance of the WriteListener is registered with a ServletOutputStream, this method will be invoked by the container the first time when it is possible to write data.

Method Detail

onWritePossible

void onWritePossible()
              throws IOException

When an instance of the WriteListener is registered with a ServletOutputStream, this method will be invoked by the container the first time when it is possible to write data. Subsequently the container will invoke this method if and only if the ServletOutputStream.isReady() method has been called and has returned a value of false and a write operation has subsequently become possible.

Throws:

IOException - if an I/O related error has occurred during processing

onError

void onError(Throwable t)

Invoked when an error occurs writing data using the non-blocking APIs.

Parameters:

t - the throwable to indicate why the write operation failed