/*******************************************************************************
 (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.
 ******************************************************************************/
using System;
using System.Collections.Generic;
using System.Text;
/* profiles_subscriber.cs

   A subscription example

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

   rtiddsgen -language C# -example <arch> profiles.idl

   Example subscription of type profiles automatically generated by 
   'rtiddsgen'. To test them, follow these steps:

   (1) Compile this file and the example publication.

   (2) Start the subscription with the command
       objs\<arch>\profiles_subscriber <domain_id> <sample_count>

   (3) Start the publication with the command
       objs\<arch>\profiles_publisher <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>:
                          
       bin\<Debug|Release>\profiles_publisher <domain_id> <sample_count>  
       bin\<Debug|Release>\profiles_subscriber <domain_id> <sample_count>
              
       
modification history
------------ -------
*/

public class profilesSubscriber {

    public class profilesListener : DDS.DataReaderListener {

        public override void on_requested_deadline_missed(
            DDS.DataReader reader,
            ref DDS.RequestedDeadlineMissedStatus status) {}
    
        public override void on_requested_incompatible_qos(
            DDS.DataReader reader,
            DDS.RequestedIncompatibleQosStatus status) {}
    
        public override void on_sample_rejected(
            DDS.DataReader reader,
            ref DDS.SampleRejectedStatus status) {}

        public override void on_liveliness_changed(
            DDS.DataReader reader,
            ref DDS.LivelinessChangedStatus status) {}

        public override void on_sample_lost(
            DDS.DataReader reader,
            ref DDS.SampleLostStatus status) {}

        public override void on_subscription_matched(
            DDS.DataReader reader,
            ref DDS.SubscriptionMatchedStatus status) {}

        public override void on_data_available(DDS.DataReader reader) {
            profilesDataReader profiles_reader =
                (profilesDataReader)reader;
            
            try {
                profiles_reader.take(
                    data_seq,
                    info_seq,
                    DDS.ResourceLimitsQosPolicy.LENGTH_UNLIMITED,
                    DDS.SampleStateKind.ANY_SAMPLE_STATE,
                    DDS.ViewStateKind.ANY_VIEW_STATE,
                    DDS.InstanceStateKind.ANY_INSTANCE_STATE);
            }
            catch(DDS.Retcode_NoData) {
                return;
            }
            catch(DDS.Exception e) {
                Console.WriteLine("take error {0}", e);
                return;
            }

            Console.WriteLine("=============================================");
            Console.WriteLine(_listener_name + " listener received");
            Console.WriteLine("=============================================");

            System.Int32 data_length = data_seq.length;
            for (int i = 0; i < data_length; ++i) {
                if (info_seq.get_at(i).valid_data) {
                    profilesTypeSupport.print_data(data_seq.get_at(i));
                }
            }

            try {
                profiles_reader.return_loan(data_seq, info_seq);
            }
            catch(DDS.Exception e) {
                Console.WriteLine("return loan error {0}", e);
            }
        }

        public profilesListener(string name) {
            data_seq = new profilesSeq();
            info_seq = new DDS.SampleInfoSeq();
            _listener_name = name;
        }

        private profilesSeq data_seq;
        private DDS.SampleInfoSeq info_seq;
        private string _listener_name;
    };

    public static void Main(string[] args) {

        // --- Get domain ID --- //
        int domain_id = 0;
        if (args.Length >= 1) {
            domain_id = Int32.Parse(args[0]);
        }

        // --- Get max loop count; 0 means infinite loop  --- //
        int sample_count = 0;
        if (args.Length >= 2) {
            sample_count = Int32.Parse(args[1]);
        }

        /* Uncomment this to turn on additional logging
        NDDS.ConfigLogger.get_instance().set_verbosity_by_category(
            NDDS.LogCategory.NDDS_CONFIG_LOG_CATEGORY_API, 
            NDDS.LogVerbosity.NDDS_CONFIG_LOG_VERBOSITY_STATUS_ALL);
        */

        // --- Run --- //
        try {
            profilesSubscriber.subscribe(
                domain_id, sample_count);
        }
        catch(DDS.Exception) {
            Console.WriteLine("error in subscriber");
        }
    }

    static void subscribe(int domain_id, int sample_count) {

        /* There are several different approaches for loading QoS profiles from 
         * XML files (see Configuring QoS with XML chapter in the RTI Connext 
         * Core Libraries and Utilities User's Manual). In this example we 
         * illustrate two of them:
         *
         * 1) Creating a file named USER_QOS_PROFILES.xml, which is loaded,
         * automatically by the DomainParticipantFactory. In this case, the file
         * defines a QoS profile named volatile_profile that configures reliable,
         * volatile DataWriters and DataReaders.
         *
         * 2) Adding XML documents to the DomainParticipantFactory using its
         * Profile QoSPolicy (DDS Extension). In this case, we add
         * my_custom_qos_profiles.xml to the url_profile sequence, which stores
         * the URLs of all the XML documents with QoS policies that are loaded 
         * by the DomainParticipantFactory aside from the ones that are 
         * automatically loaded.
         * my_custom_qos_profiles.xml defines a QoS profile named
         * transient_local_profile that configures reliable, transient local
         * DataWriters and DataReaders.
         */

        /* To load my_custom_qos_profiles.xml, as explained above, we need to 
         * modify the  DDSTheParticipantFactory Profile QoSPolicy 
         */
        DDS.DomainParticipantFactoryQos factory_qos =
            new DDS.DomainParticipantFactoryQos();
        DDS.DomainParticipantFactory.get_instance().get_qos(factory_qos);

        /* We are only going to add one XML file to the url_profile sequence, so 
         * we ensure a length of 1,1. 
         */
        factory_qos.profile.url_profile.ensure_length(1, 1);

        /* The XML file will be loaded from the working directory. That means, 
         * you need to run the example like this:
         * ./objs/<architecture>/profiles_publisher
         * (see README.txt for more information on how to run the example).
         *
         * Note that you can specify the absolute path of the XML QoS file to 
         * avoid this problem.
         */
        factory_qos.profile.url_profile.set_at(0,
            "file://my_custom_qos_profiles.xml");
        DDS.DomainParticipantFactory.get_instance().set_qos(factory_qos);

        // --- Create participant --- //
        /* Our default Qos profile, volatile_profile, sets the participant name.
         * This is the only participant_qos policy that we change in our
         * example. As this is done in the default QoS profile, we don't need
         * to specify its name, so we can create the participant using the
         * create_participant() method rather than using
         * create_participant_with_profile().  
         */
        DDS.DomainParticipant participant =
            DDS.DomainParticipantFactory.get_instance().create_participant(
                domain_id,
                DDS.DomainParticipantFactory.PARTICIPANT_QOS_DEFAULT, 
                null /* listener */,
                DDS.StatusMask.STATUS_MASK_NONE);
        if (participant == null) {
            shutdown(participant);
            throw new ApplicationException("create_participant error");
        }

        // --- Create subscriber --- //
        /* We haven't changed the subscriber_qos in any of QoS profiles we use 
         * in this example, so we can just use the create_topic() method. If you
         * want to load an specific profile in which you may have changed the
         * publisher_qos, use the create_publisher_with_profile() method. 
         */
        DDS.Subscriber subscriber = participant.create_subscriber(
            DDS.DomainParticipant.SUBSCRIBER_QOS_DEFAULT,
            null /* listener */,
            DDS.StatusMask.STATUS_MASK_NONE);
        if (subscriber == null) {
            shutdown(participant);
            throw new ApplicationException("create_subscriber error");
        }

        // --- Create topic --- //

        /* Register the type before creating the topic */
        System.String type_name = profilesTypeSupport.get_type_name();
        try {
            profilesTypeSupport.register_type(
                participant, type_name);
        }
        catch(DDS.Exception e) {
            Console.WriteLine("register_type error {0}", e);
            shutdown(participant);
            throw e;
        }

        /* We haven't changed the topic_qos in any of QoS profiles we use in 
         * this example, so we can just use the create_topic() method. If you 
         * want to load an specific profile in which you may have changed the 
         * topic_qos, use the create_topic_with_profile() method. 
         */
        DDS.Topic topic = participant.create_topic(
            "Example profiles",
            type_name,
            DDS.DomainParticipant.TOPIC_QOS_DEFAULT,
            null /* listener */,
            DDS.StatusMask.STATUS_MASK_NONE);
        if (topic == null) {
            shutdown(participant);
            throw new ApplicationException("create_topic error");
        }

        // --- Create reader --- //

        /* Create a data reader listener */
        profilesListener reader_volatile_listener =
            new profilesListener("volatile_profile");
        profilesListener reader_transient_local_listener =
            new profilesListener("transient_local_profile");

        /* Volatile reader -- As volatile_profile is the default qos profile
         * we don't need to specify the profile we are going to use, we can
         * just call create_datareader passing DDS_DATAWRITER_QOS_DEFAULT. 
         */
        DDS.DataReader reader_volatile = subscriber.create_datareader(
            topic,
            DDS.Subscriber.DATAREADER_QOS_DEFAULT,
            reader_volatile_listener,
            DDS.StatusMask.STATUS_MASK_ALL);
        if (reader_volatile == null) {
            shutdown(participant);
            reader_volatile = null;
            throw new ApplicationException("create_datareader_volatile error");
        }

        /* Transient Local writer -- In this case we use
         * create_datareader_with_profile, because we have to use a profile 
         * other than the default one. This profile has been defined in
         * my_custom_qos_profiles.xml, but since we already loaded the XML file
         * we don't need to specify anything else. 
         */
        DDS.DataReader reader_transient_local = 
            subscriber.create_datareader_with_profile(
                topic,
                "profiles_Library",
                "transient_local_profile",
                reader_transient_local_listener,
                DDS.StatusMask.STATUS_MASK_ALL);
        if (reader_transient_local == null)
        {
            shutdown(participant);
            reader_transient_local = null;
            throw new ApplicationException("create_datareader_transient_local" + 
            "error");
        }
        Console.WriteLine("Created reader_transient_local");
        // --- Wait for data --- //

        /* Main loop */
        const System.Int32 receive_period = 1000; // milliseconds
        for (int count=0;
             (sample_count == 0) || (count < sample_count);
             ++count) {
            Console.WriteLine(
                "profiles subscriber sleeping for {0} sec...",
                receive_period / 1000);

            System.Threading.Thread.Sleep(receive_period);
        }

        // --- Shutdown --- //

        /* Delete all entities */
        shutdown(participant);
        reader_volatile_listener = null;
        reader_transient_local_listener = null;
    }


    static void shutdown(
        DDS.DomainParticipant participant) {

        /* Delete all entities */

        if (participant != null) {
            participant.delete_contained_entities();
            DDS.DomainParticipantFactory.get_instance().delete_participant(
                ref participant);
        }

        /* RTI Connext provides finalize_instance() method on
           domain participant factory for users who want to release memory
           used by the participant factory. Uncomment the following block of
           code for clean destruction of the singleton. */
        /*
        try {
            DDS.DomainParticipantFactory.finalize_instance();
        }
        catch(DDS.Exception e) {
            Console.WriteLine("finalize_instance error {0}", e);
            throw e;
        }
        */
    }
}