| /* |
| * 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 org.apache.axis2.clustering.control.wka; |
| |
| import org.apache.axis2.clustering.ClusteringFault; |
| import org.apache.axis2.clustering.MembershipScheme; |
| import org.apache.axis2.clustering.tribes.MembershipManager; |
| import org.apache.axis2.clustering.tribes.TribesUtil; |
| import org.apache.axis2.clustering.tribes.WkaBasedMembershipScheme; |
| import org.apache.catalina.tribes.Member; |
| import org.apache.catalina.tribes.RemoteProcessException; |
| import org.apache.catalina.tribes.group.RpcCallback; |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| |
| import java.io.Serializable; |
| |
| /** |
| * Handles RPC membership requests from members. This is used only in conjunction with WKA based |
| * membership mamangement |
| */ |
| public class RpcMembershipRequestHandler implements RpcCallback { |
| |
| private static Log log = LogFactory.getLog(RpcMembershipRequestHandler.class); |
| private MembershipManager membershipManager; |
| private WkaBasedMembershipScheme membershipScheme; |
| |
| public RpcMembershipRequestHandler(MembershipManager membershipManager, |
| WkaBasedMembershipScheme membershipScheme) { |
| this.membershipManager = membershipManager; |
| this.membershipScheme = membershipScheme; |
| } |
| |
| public Serializable replyRequest(Serializable msg, Member sender) { |
| String domain = new String(sender.getDomain()); |
| |
| if (log.isDebugEnabled()) { |
| log.debug("Membership request received by RpcMembershipRequestHandler for domain " + |
| domain); |
| log.debug("local domain: " + new String(membershipManager.getDomain())); |
| } |
| |
| if (msg instanceof JoinGroupCommand) { |
| log.info("Received JOIN message from " + TribesUtil.getName(sender)); |
| membershipManager.memberAdded(sender); |
| |
| // do something specific for the membership scheme |
| membershipScheme.processJoin(sender); |
| |
| // Return the list of current members to the caller |
| MemberListCommand memListCmd = new MemberListCommand(); |
| memListCmd.setMembers(membershipManager.getMembers()); |
| if(log.isDebugEnabled()){ |
| log.debug("Sent MEMBER_LIST to " + TribesUtil.getName(sender)); |
| } |
| return memListCmd; |
| } else if (msg instanceof MemberJoinedCommand) { |
| log.info("Received MEMBER_JOINED message from " + TribesUtil.getName(sender)); |
| MemberJoinedCommand command = (MemberJoinedCommand) msg; |
| if(log.isDebugEnabled()){ |
| log.debug(command); |
| } |
| |
| try { |
| command.setMembershipManager(membershipManager); |
| command.execute(null); |
| } catch (ClusteringFault e) { |
| String errMsg = "Cannot handle MEMBER_JOINED notification"; |
| log.error(errMsg, e); |
| throw new RemoteProcessException(errMsg, e); |
| } |
| } else if (msg instanceof MemberListCommand) { |
| try { //TODO: What if we receive more than one member list message? |
| log.info("Received MEMBER_LIST message from " + TribesUtil.getName(sender)); |
| MemberListCommand command = (MemberListCommand) msg; |
| command.setMembershipManager(membershipManager); |
| command.execute(null); |
| |
| return "Processed MEMBER_LIST message"; |
| //TODO Send MEMBER_JOINED messages to all nodes |
| } catch (ClusteringFault e) { |
| String errMsg = "Cannot handle MEMBER_LIST message from " + |
| TribesUtil.getName(sender); |
| log.error(errMsg, e); |
| throw new RemoteProcessException(errMsg, e); |
| } |
| } |
| return null; |
| } |
| |
| public void leftOver(Serializable msg, Member member) { |
| //TODO: Method implementation |
| |
| } |
| } |