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.ArrayList;
  
  import org.omg.dds.core.Duration;
  import org.omg.dds.core.ServiceEnvironment;
  import org.omg.dds.core.StatusCondition;
  import org.omg.dds.core.WaitSet;
  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.Status;
  import org.omg.dds.domain.DomainParticipant;
  import org.omg.dds.pub.DataWriter;
  import org.omg.dds.pub.DataWriterQos;
  import org.omg.dds.pub.Publisher;
  import org.omg.dds.pub.PublisherQos;
  import org.omg.dds.sub.*;
  import org.omg.dds.topic.Topic;
  
  import java.util.Arrays;
  import java.util.Collection;
  import java.util.concurrent.TimeUnit;
  
  import org.omg.dds.core.GuardCondition;
  import org.omg.dds.core.policy.WriterDataLifecycle;
  import org.omg.dds.domain.DomainParticipantFactory;
  
  /**
   * This class serves as a container holding initialized entities used by Ping
   * and Pong
   */
  class Entities {
  
      public Entities(String pubPartition, String subPartition) throws Exception,
              NullPointerException {
          /*
           * Select DDS implementation and initialize DDS ServiceEnvironment
           */
          System.setProperty(
                  ServiceEnvironment.IMPLEMENTATION_CLASS_NAME_PROPERTY,
                  "org.opensplice.dds.core.OsplServiceEnvironment");
          env = ServiceEnvironment
                  .createInstance(Entities.class.getClassLoader());
          PolicyFactory policyFactory = env.getSPI().getPolicyFactory();
          Partition publisherPartition = policyFactory.Partition().withName(
                  Arrays.asList(pubPartition));
          Partition subscriberPartition = policyFactory.Partition().withName(
                  Arrays.asList(subPartition));
          /*
           * A DomainParticipant is created for the default domain.
           */
          domainParticipantFactory = DomainParticipantFactory.getInstance(env);
          participant = domainParticipantFactory.createParticipant();
          /*
           * A Topic is created for our sample type on the domain participant.
           */
          topic = participant.createTopic("RoundTrip",
                  RoundTripModule.DataType.class);
          /*
           * A Publisher is created on the domain participant.
           */
          PublisherQos pubQos = participant.getDefaultPublisherQos();
          pubQos = pubQos.withPolicies(publisherPartition);
          publisher = participant.createPublisher(pubQos);
          /*
           * A DataWriter is created on the Publisher & Topic with a modified Qos.
           */
          DataWriterQos dwQos = publisher.getDefaultDataWriterQos();
          Duration max_blocking_time = env.getSPI().newDuration(10,
                  TimeUnit.SECONDS);
          Reliability reliable = policyFactory.Reliability().withReliable()
                  .withMaxBlockingTime(max_blocking_time);
          WriterDataLifecycle writer_data_lifecycle = policyFactory
                  .WriterDataLifecycle().withAutDisposeUnregisteredInstances(
                          false);
          dwQos = dwQos.withPolicies(reliable)
                  .withPolicies(writer_data_lifecycle);
          writer = publisher.createDataWriter(topic, dwQos);
  
          /*
           * A Subscriber is created on the domain participant.
           */
          SubscriberQos subQos = participant.getDefaultSubscriberQos();
          subQos = subQos.withPolicies(subscriberPartition);
          subscriber = participant.createSubscriber(subQos);
          /*
           * A DDS::DataReader is created on the Subscriber & Topic with the
           * default Topic QoS.
           */
          DataReaderQos drQos = subscriber.getDefaultDataReaderQos();
          drQos = drQos.withPolicies(reliable);
          reader = subscriber.createDataReader(topic, drQos);
          /*
           * A StatusCondition is created which is triggered when data is
           * available to read
           */
          dataAvailable = reader.getStatusCondition();
          Collection<Class<? extends Status>> statuses = new ArrayList<Class<? extends Status>>();
          statuses.add(DataAvailableStatus.class);
          dataAvailable.setEnabledStatuses(statuses);
          /*
           * A WaitSet is created and the data available status condition is
           * attached
           */
          waitSet = env.getSPI().newWaitSet();
          waitSet.attachCondition(dataAvailable);
  
          terminated = env.getSPI().newGuardCondition();
          waitSet.attachCondition(terminated);
      }
  
      public ServiceEnvironment env;
      public DomainParticipantFactory domainParticipantFactory;
      public DomainParticipant participant;
      public RoundTripModule.DataType typeSupport;
      public Topic<RoundTripModule.DataType> topic;
      public Publisher publisher;
      public DataWriter<RoundTripModule.DataType> writer;
      public Subscriber subscriber;
      public DataReader<RoundTripModule.DataType> reader;
      public WaitSet waitSet;
      public StatusCondition<DataReader<RoundTripModule.DataType>> dataAvailable;
      public GuardCondition terminated;
  }
  