/*******************************************************************************
 (c) 2005-2014 Copyright, Real-Time Innovations, Inc.  All rights reserved.
 RTI grants Licensee a license to use, modify, compile, and create derivative
 works of the Software.  Licensee has the right to distribute object form only
 for use with RTI products.  The Software is provided "as is", with no warranty
 of any type, including any warranty for fitness for any purpose. RTI is under
 no obligation to maintain or support the Software.  RTI shall not be liable for
 any incidental or consequential damages arising out of the use or inability to
 use the software.
 ******************************************************************************/

/* hello_worldSubscriber.java

   A publication of data of type hello_world

   This file is derived from code automatically generated by the rtiddsgen 
   command:

   rtiddsgen -language java -example <arch> .idl

   Example publication of type hello_world automatically generated by 
   'rtiddsgen' To test them follow these steps:

   (1) Compile this file and the example subscription.

   (2) Start the subscription on the same domain used for with the command
       java hello_worldSubscriber <domain_id> <sample_count>

   (3) Start the publication with the command
       java hello_worldPublisher <domain_id> <sample_count>

   (4) [Optional] Specify the list of discovery initial peers and 
       multicast receive addresses via an environment variable or a file 
       (in the current working directory) called NDDS_DISCOVERY_PEERS. 
       
   You can run any number of publishers and subscribers programs, and can 
   add and remove them dynamically from the domain.
              
                                   
   Example:
        
       To run the example application on domain <domain_id>:
            
       Ensure that $(NDDSHOME)/lib/<arch> is on the dynamic library path for
       Java.                       
       
        On UNIX systems: 
             add $(NDDSHOME)/lib/<arch> to the 'LD_LIBRARY_PATH' environment
             variable
                                         
        On Windows systems:
             add %NDDSHOME%\lib\<arch> to the 'Path' environment variable
                        

       Run the Java applications:
       
        java -Djava.ext.dirs=$NDDSHOME/class hello_worldPublisher <domain_id>

        java -Djava.ext.dirs=$NDDSHOME/class hello_worldSubscriber <domain_id>  
       
       
modification history
------------ -------   
*/

import java.net.InetAddress;
import java.net.UnknownHostException;
import java.util.Arrays;

import com.rti.dds.domain.*;
import com.rti.dds.infrastructure.*;
import com.rti.dds.subscription.*;
import com.rti.dds.topic.*;
import com.rti.ndds.config.*;

// ===========================================================================

public class hello_worldSubscriber {
    // -----------------------------------------------------------------------
    // Public Methods
    // -----------------------------------------------------------------------

    // This function will take the values from the command line parameters
    private static int READ_INTEGER_PARAM(int i, String parameter,
            String[] args, String syntax) {
        if (args[i].equals(parameter)) {
            if (i + 1 >= args.length) {
                System.out.println(syntax);
                return -1;
            }
            return Integer.valueOf(args[i + 1]).intValue();
        }
        return 0;
    }

    public static void main(String[] args) {
        int domain_id = 0;
        int sample_count = 0;
        int drs = 0;
        String syntax;
        int i = 0;

        syntax = new String("[options] \n"
                + "-domain_id <domain ID> (default: 0)\n"
                + "-sample_count <number of published samples> "
                + "(default: infinite)\n"
                + "-drs <1|0> Enable/Disable durable reader state "
                + "(default: 0)");

        for (i = 0; i < args.length; ++i) {
            if (domain_id == 0) {
                domain_id = READ_INTEGER_PARAM(i, "-domain_id", args, syntax);
            }
            
            if (sample_count == 0) {
                sample_count = READ_INTEGER_PARAM(i, "-sample_count", args,
                        syntax);
            }
            
            if (drs == 0) {
                drs = READ_INTEGER_PARAM(i, "-drs", args, syntax);
            }
        }

        if (domain_id < 0 || sample_count < 0 || drs < 0) {
            return;
        }
        
        /* Uncomment this to turn on additional logging
        Logger.get_instance().set_verbosity_by_category(
            LogCategory.NDDS_CONFIG_LOG_CATEGORY_API,
            LogVerbosity.NDDS_CONFIG_LOG_VERBOSITY_STATUS_ALL);
        */
        
        // --- Run --- //
        subscriberMain(domain_id, sample_count, drs);
    }

    // -----------------------------------------------------------------------
    // Private Methods
    // -----------------------------------------------------------------------
    
    // --- Constructors: -----------------------------------------------------
    
    private hello_worldSubscriber() {
        super();
    }
    
    
    // -----------------------------------------------------------------------
    
    private static void subscriberMain(int domainId, int sampleCount, int drs) {

        DomainParticipant participant = null;
        Subscriber subscriber = null;
        Topic topic = null;
        DataReaderListener listener = null;
        hello_worldDataReader reader = null;

        try {

            // --- Create participant --- //
    
            /* To customize participant QoS, use
               the configuration file
               USER_QOS_PROFILES.xml */
    
            participant = DomainParticipantFactory.TheParticipantFactory.
                create_participant(
                    domainId, DomainParticipantFactory.PARTICIPANT_QOS_DEFAULT,
                    null /* listener */, StatusKind.STATUS_MASK_NONE);
            if (participant == null) {
                System.err.println("create_participant error\n");
                return;
            }                         

            // --- Create subscriber --- //
    
            /* To customize subscriber QoS, use
               the configuration file USER_QOS_PROFILES.xml */
    
            subscriber = participant.create_subscriber(
                DomainParticipant.SUBSCRIBER_QOS_DEFAULT, null /* listener */,
                StatusKind.STATUS_MASK_NONE);
            if (subscriber == null) {
                System.err.println("create_subscriber error\n");
                return;
            }     
                
            // --- Create topic --- //
        
            /* Register type before creating topic */
            String typeName = hello_worldTypeSupport.get_type_name(); 
            hello_worldTypeSupport.register_type(participant, typeName);
    
            /* To customize topic QoS, use
               the configuration file USER_QOS_PROFILES.xml */
    
            topic = participant.create_topic(
                "Example hello_world",
                typeName, DomainParticipant.TOPIC_QOS_DEFAULT,
                null /* listener */, StatusKind.STATUS_MASK_NONE);
            if (topic == null) {
                System.err.println("create_topic error\n");
                return;
            }                     
        
            // --- Create reader --- //

            listener = new hello_worldListener();
    
            /* To customize data reader QoS, use
               the configuration file USER_QOS_PROFILES.xml */
            
            /* If you use Durable Reader State, you need to set up several properties.
             * In this example, we have modified them using a QoS XML profile. See
             * further details in USER_QOS_PROFILES.xml.
             */

            if (drs == 1) {
                reader = (hello_worldDataReader) 
                        subscriber.create_datareader_with_profile(topic, 
                                "persistence_example_Library", 
                                "durable_reader_state_Profile", 
                                listener, StatusKind.STATUS_MASK_ALL);
            } else  {
                reader = (hello_worldDataReader) 
                        subscriber.create_datareader_with_profile(topic, 
                                "persistence_example_Library", 
                                "persistence_service_Profile", 
                                listener, StatusKind.STATUS_MASK_ALL);
            }
            
            if (reader == null) {
                System.err.println("create_datareader error\n");
                return;
            }                         
        
            // --- Wait for data --- //

            final long receive_period_sec = 4;

            for (int count = 0;
                 (sampleCount == 0) || (count < sampleCount);
                 ++count) {
                System.out.println("hello_world subscriber sleeping for "
                                   + receive_period_sec + " sec...");
                try {
                    Thread.sleep(receive_period_sec * 1000);  // in millisec
                } catch (InterruptedException ix) {
                    System.err.println("INTERRUPTED");
                    break;
                }
            }
        } finally {

            // --- Shutdown --- //

            if(participant != null) {
                participant.delete_contained_entities();

                DomainParticipantFactory.TheParticipantFactory.
                    delete_participant(participant);
            }
            /* RTI Connext provides the finalize_instance()
               method for users who want to release memory used by the
               participant factory singleton. Uncomment the following block of
               code for clean destruction of the participant factory
               singleton. */
            //DomainParticipantFactory.finalize_instance();
        }
    }
    
    // -----------------------------------------------------------------------
    // Private Types
    // -----------------------------------------------------------------------
    
    // =======================================================================
    
    private static class hello_worldListener extends DataReaderAdapter {
            
        hello_worldSeq _dataSeq = new hello_worldSeq();
        SampleInfoSeq _infoSeq = new SampleInfoSeq();

        public void on_data_available(DataReader reader) {
            hello_worldDataReader hello_worldReader =
                (hello_worldDataReader)reader;
            
            try {
                hello_worldReader.take(
                    _dataSeq, _infoSeq,
                    ResourceLimitsQosPolicy.LENGTH_UNLIMITED,
                    SampleStateKind.ANY_SAMPLE_STATE,
                    ViewStateKind.ANY_VIEW_STATE,
                    InstanceStateKind.ANY_INSTANCE_STATE);

                for(int i = 0; i < _dataSeq.size(); ++i) {
                    SampleInfo info = (SampleInfo)_infoSeq.get(i);

                    if (info.valid_data) {
                        System.out.println(
                            ((hello_world)_dataSeq.get(i)).
                                toString("Received",0));


                    }
                }
            } catch (RETCODE_NO_DATA noData) {
                // No data to process
            } finally {
                hello_worldReader.return_loan(_dataSeq, _infoSeq);
            }
        }
    }
}