1 /* 2 * Licensed to the Apache Software Foundation (ASF) under one 3 * or more contributor license agreements. See the NOTICE file 4 * distributed with this work for additional information 5 * regarding copyright ownership. The ASF licenses this file 6 * to you under the Apache License, Version 2.0 (the 7 * "License"); you may not use this file except in compliance 8 * with the License. You may obtain a copy of the License at 9 * 10 * http://www.apache.org/licenses/LICENSE-2.0 11 * 12 * Unless required by applicable law or agreed to in writing, 13 * software distributed under the License is distributed on an 14 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 15 * KIND, either express or implied. See the License for the 16 * specific language governing permissions and limitations 17 * under the License. 18 * 19 */ 20 package org.apache.mina.service.executor; 21 22 import org.apache.mina.api.IoHandler; 23 import org.apache.mina.api.IoSession; 24 25 /** 26 * A {@link IoHandler} event to be submitted to an {@link IoHandlerExecutor}. 27 * 28 * Use the visitor pattern for implementing different behaviour for different events : <a 29 * href="http://en.wikipedia.org/wiki/Visitor_pattern">visitor pattern"</a> 30 * 31 * @author <a href="http://mina.apache.org">Apache MINA Project</a> 32 */ 33 public interface Event { 34 35 /** 36 * The session of this event. 37 * 38 * @return the session (cannot be null) 39 */ 40 IoSession getSession(); 41 42 /** 43 * Call the visitor method for this kind of event. 44 * 45 * @param visitor the vistor to call 46 */ 47 void visit(EventVisitor visitor); 48 }