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  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
  * this work for additional information regarding copyright ownership.
  * The ASF licenses this file to You under the Apache License, Version 2.0
  * (the "License"); you may not use this file except in compliance with
  * the License.  You may obtain a copy of the License at
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * See the License for the specific language governing permissions and
 * limitations under the License.
package org.apache.coyote.http11.upgrade.servlet31;
Receives notification of write events when using non-blocking IO.
public interface WriteListener extends java.util.EventListener{

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 org.apache.coyote.http11.upgrade.AbstractServletOutputStream.isReady() has returned false and it has since become possible to write data.

    public void onWritePossible() throws IOException;

Invoked if an error occurs while writing the response.

    public void onError(java.lang.Throwable throwable);
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