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.activemq.network;
  
  import java.util.Map;
  import java.util.Set;
  import java.util.concurrent.ConcurrentHashMap;
  import java.util.concurrent.CopyOnWriteArraySet;
  import java.util.concurrent.TimeUnit;
  import java.util.concurrent.atomic.AtomicBoolean;
  import java.util.concurrent.atomic.AtomicInteger;
  
  import org.apache.activemq.command.ConsumerId;
  import org.apache.activemq.command.ConsumerInfo;
  import org.apache.activemq.command.NetworkBridgeFilter;
  import org.apache.activemq.command.SubscriptionInfo;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  /**
   * Represents a network bridge interface
   */
  public class DemandSubscription {
      private static final Logger LOG = LoggerFactory.getLogger(DemandSubscription.class);
  
      private final ConsumerInfo remoteInfo;
      private final ConsumerInfo localInfo;
      private final Set<ConsumerId> remoteSubsIds = new CopyOnWriteArraySet<ConsumerId>();
      private final AtomicInteger dispatched = new AtomicInteger(0);
      private final AtomicBoolean activeWaiter = new AtomicBoolean();
      private final Set<SubscriptionInfo> durableRemoteSubs = new CopyOnWriteArraySet<SubscriptionInfo>();
      private final Set<ConsumerId> forcedDurableConsumers = new CopyOnWriteArraySet<ConsumerId>();
      private SubscriptionInfo localDurableSubscriber;
  
      private NetworkBridgeFilter networkBridgeFilter;
      private boolean staticallyIncluded;
  
      DemandSubscription(ConsumerInfo info) {
          remoteInfo = info;
          localInfo = info.copy();
          localInfo.setNetworkSubscription(true);
          remoteSubsIds.add(info.getConsumerId());
      }
  
      @Override
      public String toString() {
          return "DemandSub{" + localInfo.getConsumerId() + ",remotes:" + remoteSubsIds + "}";
      }
  
      /**
       * Increment the consumers associated with this subscription
       *
       * @param id
       * @return true if added
       */
      public boolean add(ConsumerId id) {
          return remoteSubsIds.add(id);
      }
  
      /**
       * Increment the consumers associated with this subscription
       *
       * @param id
       * @return true if removed
       */
      public boolean remove(ConsumerId id) {
          return remoteSubsIds.remove(id);
      }
  
      public Set<SubscriptionInfo> getDurableRemoteSubs() {
          return durableRemoteSubs;
      }
  
      /**
       * @return true if there are no interested consumers
       */
      public boolean isEmpty() {
          return remoteSubsIds.isEmpty();
      }
  
      public int size() {
          return remoteSubsIds.size();
      }
      /**
       * @return Returns the localInfo.
       */
      public ConsumerInfo getLocalInfo() {
          return localInfo;
      }
  
      /**
       * @return Returns the remoteInfo.
       */
      public ConsumerInfo getRemoteInfo() {
          return remoteInfo;
      }
  
      public boolean addForcedDurableConsumer(ConsumerId id) {
          return forcedDurableConsumers.add(id);
      }
  
      public boolean removeForcedDurableConsumer(ConsumerId id) {
          return forcedDurableConsumers.remove(id);
      }
  
      public int getForcedDurableConsumersSize() {
          return forcedDurableConsumers.size();
      }
  
      public void waitForCompletion() {
          if (dispatched.get() > 0) {
              LOG.debug("Waiting for completion for sub: {}, dispatched: {}", localInfo.getConsumerId(), this.dispatched.get());
              activeWaiter.set(true);
              if (dispatched.get() > 0) {
                  synchronized (activeWaiter) {
                      try {
                          activeWaiter.wait(TimeUnit.SECONDS.toMillis(30));
                      } catch (InterruptedException ignored) {
                      }
                  }
                  if (this.dispatched.get() > 0) {
                      LOG.warn("demand sub interrupted or timedout while waiting for outstanding responses, expect potentially {} duplicate forwards", this.dispatched.get());
                  }
              }
          }
      }
  
      public void decrementOutstandingResponses() {
          if (dispatched.decrementAndGet() == 0 && activeWaiter.get()) {
              synchronized (activeWaiter) {
                  activeWaiter.notifyAll();
              }
          }
      }
  
      public boolean incrementOutstandingResponses() {
          dispatched.incrementAndGet();
          if (activeWaiter.get()) {
              decrementOutstandingResponses();
              return false;
          }
          return true;
      }
  
      public NetworkBridgeFilter getNetworkBridgeFilter() {
          return networkBridgeFilter;
      }
  
      public void setNetworkBridgeFilter(NetworkBridgeFilter networkBridgeFilter) {
          this.networkBridgeFilter = networkBridgeFilter;
      }
  
      public SubscriptionInfo getLocalDurableSubscriber() {
          return localDurableSubscriber;
      }
  
      public void setLocalDurableSubscriber(SubscriptionInfo localDurableSubscriber) {
          this.localDurableSubscriber = localDurableSubscriber;
      }
  
      public boolean isStaticallyIncluded() {
          return staticallyIncluded;
      }
  
      public void setStaticallyIncluded(boolean staticallyIncluded) {
          this.staticallyIncluded = staticallyIncluded;
      }
  }
  