javax.servlet

Interface ReadListener

All Superinterfaces:

EventListener

public interface ReadListener
extends EventListener

This class represents a call-back mechanism that will notify implementations as HTTP request data becomes available to be read without blocking.

Since:

Servlet 3.1

Method Summary

Modifier and Type	Method and Description
void	onAllDataRead() Invoked when all data for the current request has been read.
void	onDataAvailable() When an instance of the ReadListener is registered with a ServletInputStream, this method will be invoked by the container the first time when it is possible to read data.
void	onError(Throwable t) Invoked when an error occurs processing the request.

Method Detail

onDataAvailable

void onDataAvailable()
              throws IOException

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

Throws:

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

onAllDataRead

void onAllDataRead()
            throws IOException

Invoked when all data for the current request has been read.

Throws:

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

onError

void onError(Throwable t)

Invoked when an error occurs processing the request.

Parameters:

t - the throwable to indicate why the read operation failed