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.filter.keepalive; 21 22 import org.apache.mina.core.session.IoSession; 23 24 /** 25 * Provides keep-alive messages to {@link KeepAliveFilter}. 26 * 27 * @author <a href="http://mina.apache.org">Apache MINA Project</a> 28 */ 29 public interface KeepAliveMessageFactory { 30 31 /** 32 * @return <tt>true</tt> if and only if the specified message is a 33 * keep-alive request message. 34 * 35 * @param session The current session 36 * @param message teh message to check 37 */ 38 boolean isRequest(IoSession session, Object message); 39 40 /** 41 * @return <tt>true</tt> if and only if the specified message is a 42 * keep-alive response message; 43 * 44 * @param session The current session 45 * @param message teh message to check 46 */ 47 boolean isResponse(IoSession session, Object message); 48 49 /** 50 * @return a (new) keep-alive request message or <tt>null</tt> if no request is required. 51 * 52 * @param session The current session 53 */ 54 Object getRequest(IoSession session); 55 56 /** 57 * @return a (new) response message for the specified keep-alive request, or <tt>null</tt> if no response is required. 58 * 59 * @param session The current session 60 * @param request The request we are lookig for 61 */ 62 Object getResponse(IoSession session, Object request); 63 }