content: /*
   * 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.infinispan.cluster;
  
  import java.util.Objects;
  import java.util.concurrent.atomic.AtomicBoolean;
  
  import org.apache.camel.cluster.CamelClusterMember;
  import org.apache.camel.cluster.CamelClusterService;
  import org.apache.camel.support.cluster.AbstractCamelClusterView;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  public abstract class InfinispanClusterView extends AbstractCamelClusterView {
      private static final Logger LOGGER = LoggerFactory.getLogger(InfinispanClusterView.class);
  
      protected InfinispanClusterView(CamelClusterService cluster, String namespace) {
          super(cluster, namespace);
      }
  
      protected abstract boolean isLeader(String id);
  
      // ***********************************************
      //
      // ***********************************************
  
      protected final class LocalMember implements CamelClusterMember {
          private final AtomicBoolean leader = new AtomicBoolean();
          private final String id;
  
          public LocalMember(String id) {
              this.id = id;
          }
  
          public void setLeader(boolean master) {
              if (master && this.leader.compareAndSet(false, true)) {
                  LOGGER.debug("Leadership taken for id: {}", id);
  
                  fireLeadershipChangedEvent(this);
                  return;
              }
              if (!master && this.leader.compareAndSet(true, false)) {
                  LOGGER.debug("Leadership lost for id: {}", id);
  
                  fireLeadershipChangedEvent(getLeader().orElse(null));
                  return;
              }
          }
  
          @Override
          public boolean isLeader() {
              return leader.get();
          }
  
          @Override
          public boolean isLocal() {
              return true;
          }
  
          @Override
          public String getId() {
              return this.id;
          }
  
          @Override
          public String toString() {
              return "LocalMember{" + "leader=" + leader + '}';
          }
      }
  
      protected final class ClusterMember implements CamelClusterMember {
          private final String id;
  
          public ClusterMember(String id) {
              this.id = id;
          }
  
          @Override
          public String getId() {
              return id;
          }
  
          @Override
          public boolean isLeader() {
              return InfinispanClusterView.this.isLeader(id);
          }
  
          @Override
          public boolean isLocal() {
              if (id == null) {
                  return false;
              }
  
              return Objects.equals(id, getLocalMember().getId());
          }
  
          @Override
          public String toString() {
              return "ClusterMember{" + "id='" + id + '\'' + '}';
          }
      }
  }
  