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.proxy;
  
  import org.apache.activemq.Service;
  import org.apache.activemq.command.ShutdownInfo;
  import org.apache.activemq.command.WireFormatInfo;
  import org.apache.activemq.transport.DefaultTransportListener;
  import org.apache.activemq.transport.Transport;
  import org.apache.activemq.util.IOExceptionSupport;
  import org.apache.activemq.util.ServiceStopper;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import java.io.IOException;
  import java.util.concurrent.atomic.AtomicBoolean;
  
  class ProxyConnection implements Service {
  
      private static final Logger LOG = LoggerFactory.getLogger(ProxyConnection.class);
  
      protected final Transport localTransport;
      protected final Transport remoteTransport;
      private final AtomicBoolean shuttingDown = new AtomicBoolean(false);
      private final AtomicBoolean running = new AtomicBoolean(false);
  
      public ProxyConnection(Transport localTransport, Transport remoteTransport) {
          this.localTransport = localTransport;
          this.remoteTransport = remoteTransport;
      }
  
      public void onFailure(IOException e) {
          if (!shuttingDown.get()) {
              LOG.debug("Transport error: {}", e.getMessage(), e);
              try {
                  stop();
              } catch (Exception ignore) {
              }
          }
      }
  
      @Override
      public void start() throws Exception {
          if (!running.compareAndSet(false, true)) {
              return;
          }
  
          this.localTransport.setTransportListener(new DefaultTransportListener() {
              @Override
              public void onCommand(Object command) {
                  boolean shutdown = false;
                  if (command.getClass() == ShutdownInfo.class) {
                      shuttingDown.set(true);
                      shutdown = true;
                  }
                  // skipping WireFormat infos
                  if (command.getClass() == WireFormatInfo.class) {
                      return;
                  }
                  try {
                      remoteTransport.oneway(command);
                      if (shutdown) {
                          stop();
                      }
                  } catch (IOException error) {
                      onFailure(error);
                  } catch (Exception error) {
                      onFailure(IOExceptionSupport.create(error));
                  }
              }
  
              @Override
              public void onException(IOException error) {
                  onFailure(error);
              }
          });
  
          this.remoteTransport.setTransportListener(new DefaultTransportListener() {
              @Override
              public void onCommand(Object command) {
                  try {
                      // skipping WireFormat infos
                      if (command.getClass() == WireFormatInfo.class) {
                          return;
                      }
                      localTransport.oneway(command);
                  } catch (IOException error) {
                      onFailure(error);
                  }
              }
  
              @Override
              public void onException(IOException error) {
                  onFailure(error);
              }
          });
  
          localTransport.start();
          remoteTransport.start();
      }
  
      @Override
      public void stop() throws Exception {
          if (!running.compareAndSet(true, false)) {
              return;
          }
          shuttingDown.set(true);
          ServiceStopper ss = new ServiceStopper();
          ss.stop(remoteTransport);
          ss.stop(localTransport);
          ss.throwFirstException();
      }
  
  
      @Override
      public boolean equals(Object arg) {
          if (arg == null || !(arg instanceof ProxyConnection)) {
              return false;
          } else {
              ProxyConnection other = (ProxyConnection) arg;
              String otherRemote = "";
              String otherLocal = "";
              String thisRemote = "";
              String thisLocal = "";
  
              if (other.localTransport != null && other.localTransport.getRemoteAddress() != null) {
                  otherLocal = other.localTransport.getRemoteAddress();
              }
              if (other.remoteTransport != null && other.remoteTransport.getRemoteAddress() != null) {
                  otherRemote = other.remoteTransport.getRemoteAddress();
              }
              if (this.remoteTransport != null && this.remoteTransport.getRemoteAddress() != null) {
                  thisRemote = this.remoteTransport.getRemoteAddress();
              }
              if (this.localTransport != null && this.localTransport.getRemoteAddress() != null) {
                  thisLocal = this.localTransport.getRemoteAddress();
              }
  
              if (otherRemote.equals(thisRemote) && otherLocal.equals(thisLocal)) {
                  return true;
              } else {
                  return false;
              }
          }
      }
  
  
      @Override
      public int hashCode() {
          int hash = 17;
          if (localTransport != null && localTransport.getRemoteAddress() != null) {
              hash += 31 * hash + localTransport.getRemoteAddress().hashCode();
          }
          if (remoteTransport != null && remoteTransport.getRemoteAddress() != null) {
              hash = 31 * hash + remoteTransport.hashCode();
          }
          return hash;
      }
  
      @Override
      public String toString() {
       	return "ProxyConnection [localTransport=" + localTransport
                  + ", remoteTransport=" + remoteTransport + ", shuttingDown="
                  + shuttingDown.get() + ", running=" + running.get() + "]";
      }
  }
  