/* * Copyright WSO2, Inc. (http://wso2.com) * * Licensed 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 org.wso2.carbon.cloud.gateway.agent.observer; /** * Represent the subject in observer for CG Agent. When a server goes down an observer will be created * who is interested in this subject */ public interface CGAgentSubject { /** * Add an observer * @param o observer */ void addObserver(CGAgentObserver o); /** * Remove observer * @param o observer */ void removeObserver(CGAgentObserver o); /** * Invoked when the subject connected with the remote server to trigger the observers * @param host remote host * @param port remote host port */ void connected(String host, int port); }