content: /*
   *                         OpenSplice DDS
   *
   *   This software and documentation are Copyright 2006 to TO_YEAR PrismTech
   *   Limited, its affiliated companies and licensors. All rights reserved.
   *
   *   Licensed 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.
   *
   */
  
  import java.util.Collection;
  import java.util.HashSet;
  import java.util.concurrent.TimeUnit;
  import java.util.concurrent.TimeoutException;
  
  import org.omg.dds.core.Duration;
  import org.omg.dds.core.GuardCondition;
  import org.omg.dds.core.ServiceEnvironment;
  import org.omg.dds.core.WaitSet;
  import org.omg.dds.core.policy.Deadline;
  import org.omg.dds.core.policy.Durability;
  import org.omg.dds.core.policy.Partition;
  import org.omg.dds.core.policy.PolicyFactory;
  import org.omg.dds.core.policy.Reliability;
  import org.omg.dds.core.status.DataAvailableStatus;
  import org.omg.dds.core.status.RequestedDeadlineMissedStatus;
  import org.omg.dds.core.status.Status;
  import org.omg.dds.domain.DomainParticipant;
  import org.omg.dds.domain.DomainParticipantFactory;
  import org.omg.dds.sub.DataReaderQos;
  import org.omg.dds.sub.Subscriber;
  import org.omg.dds.sub.SubscriberQos;
  import org.omg.dds.topic.Topic;
  import org.omg.dds.topic.TopicQos;
  
  import ListenerData.Msg;
  
  public class ListenerDataSubscriber {
      static String partitionName = "Listener example";
  
  	public static void main(String[] args) {
  	    try {
              System.setProperty(
                        ServiceEnvironment.IMPLEMENTATION_CLASS_NAME_PROPERTY,
                        "org.opensplice.dds.core.OsplServiceEnvironment");
              ServiceEnvironment env = ServiceEnvironment
                        .createInstance(ListenerDataSubscriber.class.getClassLoader());
  
              DomainParticipantFactory dpf = DomainParticipantFactory.getInstance(env);
  
              // create Domain Participant
              DomainParticipant participant = dpf.createParticipant();
  
              // create Topic with reliable, transient and deadline qos
              PolicyFactory policyFactory = env.getSPI().getPolicyFactory();
              Reliability reliable = policyFactory.Reliability().withReliable();
              Durability durability = policyFactory.Durability().withTransient();
              Deadline deadline = policyFactory.Deadline().withPeriod(Duration.newDuration(1, TimeUnit.SECONDS, env));
              TopicQos topicQos = participant.getDefaultTopicQos().withPolicies(reliable,durability,deadline);
              Collection<Class<? extends Status>> status = new HashSet<Class<? extends Status>>();
              Topic<Msg> topic = participant.createTopic("ListenerData_Msg", Msg.class,topicQos, null, status);
  
              // create Subscriber with partition qos
              Partition partition = policyFactory.Partition().withName(partitionName);
              SubscriberQos subQos = participant.getDefaultSubscriberQos().withPolicy(partition);
              Subscriber sub = participant.createSubscriber(subQos);
  
  
              GuardCondition myGC = GuardCondition.newGuardCondition(env);
              ListenerDataListener myListener = new ListenerDataListener(myGC);
              Collection<Class<? extends Status>> statuses = new HashSet<Class<? extends Status>>();
              statuses.add(DataAvailableStatus.class);
              statuses.add(RequestedDeadlineMissedStatus.class);
  
              // create dataReader with the attached listener
              DataReaderQos drQos = sub.copyFromTopicQos(sub.getDefaultDataReaderQos(),topic.getQos());
              sub.createDataReader(topic,drQos,myListener,statuses);
  
      		// waitset used to avoid spinning in the loop below
      		WaitSet ws = WaitSet.newWaitSet(env);
      		ws.attachCondition(myGC);
      		int count = 0;
      		Duration waitTimeout = Duration.newDuration(200000000, TimeUnit.NANOSECONDS, env);
              while (!myListener.closed && count < 1500) {
  
                  // To avoid spinning here. We can either use a sleep or better a WaitSet.
                  try {
                      ws.waitForConditions(waitTimeout);
                  } catch (TimeoutException te) {
                      ++count;
                  }
                  myGC.setTriggerValue(false);
  
              }
      		// cleanup
      		participant.close();
  	    } catch(Exception e) {
              System.out.println("Error occured: " + e.getMessage());
              e.printStackTrace();
          }
  	}
  }
  