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.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.History;
  import org.omg.dds.core.policy.ResourceLimits;
  import org.omg.dds.domain.DomainParticipantFactory;
  
  /**
   * This class serves as a container holding initialized entities used for
   * subscribing
   */
  class SubEntities {
      public SubEntities(String partitionName) 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(SubEntities.class
                  .getClassLoader());
          PolicyFactory policyFactory = env.getSPI().getPolicyFactory();
          Partition subscriberPartition = policyFactory.Partition().withName(
                  Arrays.asList(partitionName));
  
          /*
           * 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("Throughput",
                  ThroughputModule.DataType.class);
  
          /*
           * 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();
          Duration max_blocking_time = env.getSPI().newDuration(10,
                  TimeUnit.SECONDS);
          Reliability reliable = policyFactory.Reliability().withReliable()
                  .withMaxBlockingTime(max_blocking_time);
          History history = policyFactory.History().withKeepAll();
          ResourceLimits resourcelimits = policyFactory.ResourceLimits()
                  .withMaxSamples(400); // JM 100 for Writer
          drQos = drQos.withPolicies(reliable).withPolicies(history)
                  .withPolicies(resourcelimits);
          reader = subscriber.createDataReader(topic, drQos);
  
          /*
           * A StatusCondition is created which is triggered when data is
           * available to read
           */
          StatusCondition<DataReader<ThroughputModule.DataType>> condition = reader
                  .getStatusCondition();
          Collection<Class<? extends Status>> statuses = new ArrayList<Class<? extends Status>>();
          statuses.add(DataAvailableStatus.class);
          condition.setEnabledStatuses(statuses);
  
          /*
           * A WaitSet is created and the data available status condition is
           * attached
           */
          waitSet = env.getSPI().newWaitSet();
          waitSet.attachCondition(condition);
  
          terminated = env.getSPI().newGuardCondition();
          waitSet.attachCondition(terminated);
      }
  
      public ServiceEnvironment env;
      public DomainParticipantFactory domainParticipantFactory;
      public DomainParticipant participant;
      public ThroughputModule.DataType typeSupport;
      public Topic<ThroughputModule.DataType> topic;
      public Subscriber subscriber;
      public DataReader<ThroughputModule.DataType> reader;
      public WaitSet waitSet;
      public StatusCondition<DataReader<ThroughputModule.DataType>> dataAvailable;
      public GuardCondition terminated;
  }
  