javax.servlet.WriteListener Maven / Gradle / Ivy
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package javax.servlet;
import java.io.IOException;
import java.util.EventListener;
/**
*
* Callback notification mechanism that signals to the developer it's possible
* to write content without blocking.
*
* @since Servlet 3.1
*/
public interface WriteListener extends EventListener {
/**
* When an instance of the WriteListener is registered with a {@link 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 {@link javax.servlet.ServletOutputStream#isReady()} method
* has been called and has returned false.
*
* @throws IOException if an I/O related error has occurred during processing
*/
public void onWritePossible() throws IOException;
/**
* Invoked when an error occurs writing data using the non-blocking APIs.
*/
public void onError(final Throwable t);
}