WriteListener (Servlet 5.0 API Documentation - Apache Tomcat 10.0.27)

All Superinterfaces:

java.util.EventListener
```
public interface WriteListener
extends java.util.EventListener
```
Receives notification of write events when using non-blocking IO.

Since:

Servlet 3.1

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`onError(java.lang.Throwable throwable)`	Invoked if an error occurs while writing the response.
`void`	`onWritePossible()`	Invoked when it it possible to write data without blocking.

- Method Detail
  - onWritePossible
```
void onWritePossible()
              throws java.io.IOException
```
    Invoked when it it possible to write data without blocking. The container will invoke this method the first time for a request as soon as data can be written. Subsequent invocations will only occur if a call to ServletOutputStream.isReady() has returned false and it has since become possible to write data.
    
    Throws:
    
    java.io.IOException - if an I/O error occurs while processing this event
  - onError
```
void onError(java.lang.Throwable throwable)
```
    Invoked if an error occurs while writing the response.
    
    Parameters:
    
    throwable - The throwable that represents the error that occurred