| /* |
| * 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 |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| |
| 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 { |
| |
| /** |
| * Invoked when an error occurs writing data using the non-blocking APIs. |
| */ |
| void onError(Throwable t); |
| |
| /** |
| * 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 ServletOutputStream.isReady() method has been called and has returned false. |
| * |
| * @throws IOException |
| * - if an I/O related error has occurred during processing |
| */ |
| void onWritePossible() throws IOException; |
| } |