| /* |
| * 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.camel.component.jgroups.raft.cluster; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| import java.util.Optional; |
| |
| import org.apache.camel.cluster.CamelClusterMember; |
| import org.apache.camel.cluster.CamelClusterService; |
| import org.apache.camel.component.jgroups.raft.JGroupsRaftConstants; |
| import org.apache.camel.component.jgroups.raft.utils.NopStateMachine; |
| import org.apache.camel.support.cluster.AbstractCamelClusterView; |
| import org.jgroups.JChannel; |
| import org.jgroups.raft.RaftHandle; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| |
| public class JGroupsRaftClusterView extends AbstractCamelClusterView { |
| |
| private static final transient Logger LOG = LoggerFactory.getLogger(JGroupsRaftClusterView.class); |
| private final CamelClusterMember localMember = new JGropusraftLocalMember(); |
| private String jgroupsConfig; |
| private String jgroupsClusterName; |
| private RaftHandle raftHandle; |
| private String raftId; |
| private volatile boolean isMaster; |
| |
| protected JGroupsRaftClusterView(CamelClusterService cluster, String namespace, String jgroupsConfig, String jgroupsClusterName, RaftHandle raftHandle, String raftId) { |
| super(cluster, namespace); |
| |
| this.jgroupsConfig = jgroupsConfig; |
| this.jgroupsClusterName = jgroupsClusterName; |
| this.raftHandle = raftHandle; |
| this.raftId = raftId; |
| } |
| |
| @Override |
| public Optional<CamelClusterMember> getLeader() { |
| if (isMaster) { |
| return Optional.of(localMember); |
| } else { |
| return Optional.empty(); |
| } |
| } |
| |
| @Override |
| public CamelClusterMember getLocalMember() { |
| return localMember; |
| } |
| |
| @Override |
| public List<CamelClusterMember> getMembers() { |
| return new ArrayList<CamelClusterMember>() {{ add(localMember); }}; |
| } |
| |
| @Override |
| protected void doStart() throws Exception { |
| if (raftHandle == null && jgroupsConfig != null && !jgroupsConfig.isEmpty()) { |
| raftHandle = new RaftHandle(new JChannel(jgroupsConfig), new NopStateMachine()).raftId(raftId); |
| } else if (raftHandle == null) { |
| raftHandle = new RaftHandle(new JChannel(JGroupsRaftConstants.DEFAULT_JGROUPSRAFT_CONFIG), new NopStateMachine()).raftId(raftId); |
| } |
| fireLeadershipChangedEvent(Optional.empty()); |
| raftHandle.addRoleListener(new ClusterRoleChangeListener(this)); |
| raftHandle.channel().connect(jgroupsClusterName); |
| } |
| |
| @Override |
| protected void doStop() throws Exception { |
| isMaster = false; |
| fireLeadershipChangedEvent(Optional.empty()); |
| LOG.info("Disconnecting JGroupsraft Channel for JGroupsRaftClusterView with Id {}", raftId); |
| raftHandle.channel().disconnect(); |
| if (raftHandle != null && raftHandle.log() != null) { |
| raftHandle.log().close(); |
| LOG.info("Closed Log for JGroupsRaftClusterView with Id {}", raftId); |
| } |
| } |
| |
| @Override |
| protected void doShutdown() throws Exception { |
| isMaster = false; |
| fireLeadershipChangedEvent(Optional.empty()); |
| if (raftHandle != null) { |
| raftHandle.channel().close(); |
| raftHandle = null; |
| } |
| |
| LOG.info("Closing JGroupsraft Channel for JGroupsRaftClusterView with Id {}", raftId); |
| if (raftHandle != null && raftHandle.channel() != null) { |
| raftHandle.channel().close(); |
| |
| LOG.info("Closed JGroupsraft Channel Channel for JGroupsRaftClusterView with Id {}", raftId); |
| } |
| LOG.info("Closing Log for JGroupsRaftClusterView with Id {}", raftId); |
| if (raftHandle != null && raftHandle.log() != null) { |
| raftHandle.log().close(); |
| LOG.info("Closed Log for JGroupsRaftClusterView with Id {}", raftId); |
| } |
| raftHandle = null; |
| } |
| |
| public boolean isMaster() { |
| return isMaster; |
| } |
| |
| public void setMaster(boolean master) { |
| isMaster = master; |
| } |
| |
| @Override |
| protected void fireLeadershipChangedEvent(Optional<CamelClusterMember> leader) { |
| super.fireLeadershipChangedEvent(leader); |
| } |
| |
| private final class JGropusraftLocalMember implements CamelClusterMember { |
| |
| @Override |
| public boolean isLeader() { |
| return isMaster; |
| } |
| |
| @Override |
| public boolean isLocal() { |
| return true; |
| } |
| |
| @Override |
| public String getId() { |
| return getClusterService().getId(); |
| } |
| } |
| } |