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.transport.reliable;
  
  import java.io.IOException;
  import java.net.DatagramSocket;
  import java.net.SocketAddress;
  
  import org.apache.activemq.openwire.OpenWireFormat;
  import org.apache.activemq.transport.udp.CommandDatagramSocket;
  import org.apache.activemq.transport.udp.DatagramHeaderMarshaller;
  import org.apache.activemq.transport.udp.UdpTransport;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  public class UnreliableCommandDatagramSocket extends CommandDatagramSocket {
  
     private static final Logger LOG = LoggerFactory.getLogger(UnreliableCommandDatagramSocket.class);
  
     private DropCommandStrategy dropCommandStrategy;
  
     public UnreliableCommandDatagramSocket(UdpTransport transport,
                                            OpenWireFormat wireFormat,
                                            int datagramSize,
                                            SocketAddress targetAddress,
                                            DatagramHeaderMarshaller headerMarshaller,
                                            DatagramSocket channel,
                                            DropCommandStrategy strategy) {
        super(transport, wireFormat, datagramSize, targetAddress, headerMarshaller, channel);
        this.dropCommandStrategy = strategy;
     }
  
     @Override
     protected void sendWriteBuffer(int commandId,
                                    SocketAddress address,
                                    byte[] data,
                                    boolean redelivery) throws IOException {
        if (dropCommandStrategy.shouldDropCommand(commandId, address, redelivery)) {
           LOG.info("Dropping datagram with command: " + commandId);
  
           // lets still add it to the replay buffer though!
           ReplayBuffer bufferCache = getReplayBuffer();
           if (bufferCache != null && !redelivery) {
              bufferCache.addBuffer(commandId, data);
           }
        } else {
           super.sendWriteBuffer(commandId, address, data, redelivery);
        }
     }
  }
  