/// <summary>
/// Create DataWriter(s)
/// </summary>
public void createWriter()
{
status = publisher.GetDefaultDataWriterQos(ref WQosH);
ErrorHandler.checkStatus(status, "Publisher.GetDefaultDataWriterQos");
status = publisher.CopyFromTopicQos(ref WQosH, topicQos);
ErrorHandler.checkStatus(status, "Publisher.CopyFromTopicQos");
if (durabilityKind.Equals("transient"))
{
WQosH.Durability.Kind = DurabilityQosPolicyKind.TransientDurabilityQos;
}
else
{
WQosH.Durability.Kind = DurabilityQosPolicyKind.PersistentDurabilityQos;
}
WQosH.WriterDataLifecycle.AutodisposeUnregisteredInstances = autoDisposeFlag;
writer = publisher.CreateDataWriter(
topic,
WQosH,
null,
StatusKind.Any);
ErrorHandler.checkHandle(writer, "Publisher.CreateDataWriter");
if (exampleName.Equals("Lifecycle"))
{
writerStopper = publisher.CreateDataWriter(
topic,
WQosH,
null,
StatusKind.Any);
ErrorHandler.checkHandle(writerStopper, "Publisher.CreateDataWriter");
}
}
private void InitializeWriter(AdapterWriterQos desiredQos)
{
var writerQos = new DataWriterQos();
topicPublisher.GetDefaultDataWriterQos(ref writerQos);
topicPublisher.CopyFromTopicQos(ref writerQos, currentTopic.TopicQos);
if (desiredQos != null)
{
writerQos.WriterDataLifecycle.AutodisposeUnregisteredInstances = false;
writerQos.Reliability.Kind = desiredQos.MessageReliabilityType.ConvertReliability();
writerQos.Durability.Kind = desiredQos.PersistenceType.ConvertPersistence();
}
// Create a DataWritter for the current Topic
dataWriter = topicPublisher.CreateDataWriter(currentTopic.TopicMessageTopic, writerQos) as DataWriter <T>;
ErrorHandler.CheckHandle(
DataWriter, "Publisher.CreateDatawriter (InitializeWriter)");
}
/***
* Operations
***/
public ITopic CreateSimulatedMultitopic(
string name,
string type_name,
string subscription_expression,
string[] expression_parameters)
{
/* Type-specific DDS entities */
ChatMessageDataReader chatMessageDR;
NameServiceDataReader nameServiceDR;
NamedMessageDataWriter namedMessageDW;
/* Query related stuff */
IQueryCondition nameFinder;
string[] nameFinderParams;
/* QosPolicy holders */
TopicQos namedMessageQos = new TopicQos();
SubscriberQos subQos = new SubscriberQos();
PublisherQos pubQos = new PublisherQos();
/* Others */
IDataReader parentReader;
IDataWriter parentWriter;
string partitionName = "ChatRoom";
string nameFinderExpr;
ReturnCode status;
/* Lookup both components that constitute the multi-topic. */
chatMessageTopic = realParticipant.FindTopic(
"Chat_ChatMessage", Duration.Infinite);
ErrorHandler.checkHandle(
chatMessageTopic,
"DDS.DomainParticipant.FindTopic (Chat_ChatMessage)");
nameServiceTopic = realParticipant.FindTopic(
"Chat_NameService", Duration.Infinite);
ErrorHandler.checkHandle(
nameServiceTopic,
"DDS.DomainParticipant.FindTopic (Chat_NameService)");
/* Create a ContentFilteredTopic to filter out
* our own ChatMessages. */
filteredMessageTopic = realParticipant.CreateContentFilteredTopic(
"Chat_FilteredMessage",
chatMessageTopic,
"userID <> %0",
expression_parameters);
ErrorHandler.checkHandle(
filteredMessageTopic,
"DDS.DomainParticipant.CreateContentFilteredTopic");
/* Adapt the default SubscriberQos to read from the
* "ChatRoom" Partition. */
status = realParticipant.GetDefaultSubscriberQos(ref subQos);
ErrorHandler.checkStatus(
status, "DDS.DomainParticipant.GetDefaultSubscriberQos");
subQos.Partition.Name = new string[1];
subQos.Partition.Name[0] = partitionName;
/* Create a private Subscriber for the multitopic simulator. */
multiSub = realParticipant.CreateSubscriber(subQos);
ErrorHandler.checkHandle(
multiSub,
"DDS.DomainParticipant.CreateSubscriber (for multitopic)");
/* Create a DataReader for the FilteredMessage Topic
* (using the appropriate QoS). */
DataReaderQos drQos = new DataReaderQos();
TopicQos topicQos = new TopicQos();
multiSub.GetDefaultDataReaderQos(ref drQos);
filteredMessageTopic.RelatedTopic.GetQos(ref topicQos);
multiSub.CopyFromTopicQos(ref drQos, topicQos);
parentReader = multiSub.CreateDataReader(filteredMessageTopic, drQos);
ErrorHandler.checkHandle(
parentReader, "DDS.Subscriber.create_datareader (ChatMessage)");
/* Narrow the abstract parent into its typed representative. */
chatMessageDR = parentReader as ChatMessageDataReader;
/* Allocate the DataReaderListener Implementation. */
msgListener = new DataReaderListenerImpl();
/* Attach the DataReaderListener to the DataReader,
* only enabling the data_available event. */
status = chatMessageDR.SetListener(msgListener, StatusKind.DataAvailable);
ErrorHandler.checkStatus(status, "DDS.DataReader_set_listener");
/* Create a DataReader for the nameService Topic
* (using the appropriate QoS). */
DataReaderQos nsDrQos = new DataReaderQos();
TopicQos nsQos = new TopicQos();
nameServiceTopic.GetQos(ref nsQos);
multiSub.CopyFromTopicQos(ref nsDrQos, nsQos);
parentReader = multiSub.CreateDataReader(nameServiceTopic, nsDrQos);
ErrorHandler.checkHandle(parentReader, "DDS.Subscriber.CreateDatareader (NameService)");
/* Narrow the abstract parent into its typed representative. */
nameServiceDR = parentReader as NameServiceDataReader;
/* Define the SQL expression (using a parameterized value). */
nameFinderExpr = "userID = %0";
/* Allocate and assign the query parameters. */
nameFinderParams = new string[1];
nameFinderParams[0] = expression_parameters[0];
/* Create a QueryCondition to only read corresponding
* nameService information by key-value. */
nameFinder = nameServiceDR.CreateQueryCondition(
SampleStateKind.Any,
ViewStateKind.Any,
InstanceStateKind.Any,
nameFinderExpr,
nameFinderParams);
ErrorHandler.checkHandle(
nameFinder, "DDS.DataReader.create_querycondition (nameFinder)");
/* Create the Topic that simulates the multi-topic
* (use Qos from chatMessage).*/
status = chatMessageTopic.GetQos(ref namedMessageQos);
ErrorHandler.checkStatus(status, "DDS.Topic.GetQos");
/* Create the NamedMessage Topic whose samples simulate
* the MultiTopic */
namedMessageTopic = realParticipant.CreateTopic(
"Chat_NamedMessage",
type_name,
namedMessageQos);
ErrorHandler.checkHandle(
namedMessageTopic,
"DDS.DomainParticipant.CreateTopic (NamedMessage)");
/* Adapt the default PublisherQos to write into the
* "ChatRoom" Partition. */
status = realParticipant.GetDefaultPublisherQos(ref pubQos);
ErrorHandler.checkStatus(
status, "DDS.DomainParticipant.get_default_publisher_qos");
pubQos.Partition.Name = new string[1];
pubQos.Partition.Name[0] = partitionName;
/* Create a private Publisher for the multitopic simulator. */
multiPub = realParticipant.CreatePublisher(pubQos);
ErrorHandler.checkHandle(
multiPub,
"DDS.DomainParticipant.create_publisher (for multitopic)");
DataWriterQos nmDwQos = new DataWriterQos();
TopicQos nmQos = new TopicQos();
multiPub.GetDefaultDataWriterQos(ref nmDwQos);
namedMessageTopic.GetQos(ref nmQos);
multiPub.CopyFromTopicQos(ref nmDwQos, nmQos);
/* Create a DataWriter for the multitopic. */
parentWriter = multiPub.CreateDataWriter(namedMessageTopic, nmDwQos);
ErrorHandler.checkHandle(
parentWriter, "DDS.Publisher.CreateDatawriter (NamedMessage)");
/* Narrow the abstract parent into its typed representative. */
namedMessageDW = parentWriter as NamedMessageDataWriter;
/* Store the relevant Entities in our Listener. */
msgListener.ChatMessageDR = chatMessageDR;
msgListener.NameServiceDR = nameServiceDR;
msgListener.NamedMessageDW = namedMessageDW;
msgListener.NameFinder = nameFinder;
msgListener.NameFinderParams = nameFinderParams;
/* Return the simulated Multitopic. */
return(namedMessageTopic);
}
/***
* Operations
***/
public ITopic CreateSimulatedMultitopic(
string name,
string type_name,
string subscription_expression,
string[] expression_parameters)
{
/* Type-specific DDS entities */
ChatMessageDataReader chatMessageDR;
NameServiceDataReader nameServiceDR;
NamedMessageDataWriter namedMessageDW;
/* Query related stuff */
IQueryCondition nameFinder;
string[] nameFinderParams;
/* QosPolicy holders */
TopicQos namedMessageQos = new TopicQos();
SubscriberQos subQos = new SubscriberQos();
PublisherQos pubQos = new PublisherQos();
/* Others */
IDataReader parentReader;
IDataWriter parentWriter;
string partitionName = "ChatRoom";
string nameFinderExpr;
ReturnCode status;
/* Lookup both components that constitute the multi-topic. */
chatMessageTopic = realParticipant.FindTopic(
"Chat_ChatMessage", Duration.Infinite);
ErrorHandler.checkHandle(
chatMessageTopic,
"DDS.DomainParticipant.FindTopic (Chat_ChatMessage)");
nameServiceTopic = realParticipant.FindTopic(
"Chat_NameService", Duration.Infinite);
ErrorHandler.checkHandle(
nameServiceTopic,
"DDS.DomainParticipant.FindTopic (Chat_NameService)");
/* Create a ContentFilteredTopic to filter out
our own ChatMessages. */
filteredMessageTopic = realParticipant.CreateContentFilteredTopic(
"Chat_FilteredMessage",
chatMessageTopic,
"userID <> %0",
expression_parameters);
ErrorHandler.checkHandle(
filteredMessageTopic,
"DDS.DomainParticipant.CreateContentFilteredTopic");
/* Adapt the default SubscriberQos to read from the
"ChatRoom" Partition. */
status = realParticipant.GetDefaultSubscriberQos (ref subQos);
ErrorHandler.checkStatus(
status, "DDS.DomainParticipant.GetDefaultSubscriberQos");
subQos.Partition.Name = new string[1];
subQos.Partition.Name[0] = partitionName;
/* Create a private Subscriber for the multitopic simulator. */
multiSub = realParticipant.CreateSubscriber(subQos);
ErrorHandler.checkHandle(
multiSub,
"DDS.DomainParticipant.CreateSubscriber (for multitopic)");
/* Create a DataReader for the FilteredMessage Topic
(using the appropriate QoS). */
DataReaderQos drQos = new DataReaderQos();
TopicQos topicQos = new TopicQos();
multiSub.GetDefaultDataReaderQos(ref drQos);
filteredMessageTopic.RelatedTopic.GetQos(ref topicQos);
multiSub.CopyFromTopicQos(ref drQos, topicQos);
parentReader = multiSub.CreateDataReader(filteredMessageTopic, drQos);
ErrorHandler.checkHandle(
parentReader, "DDS.Subscriber.create_datareader (ChatMessage)");
/* Narrow the abstract parent into its typed representative. */
chatMessageDR = parentReader as ChatMessageDataReader;
/* Allocate the DataReaderListener Implementation. */
msgListener = new DataReaderListenerImpl();
/* Attach the DataReaderListener to the DataReader,
only enabling the data_available event. */
status = chatMessageDR.SetListener(msgListener, StatusKind.DataAvailable);
ErrorHandler.checkStatus(status, "DDS.DataReader_set_listener");
/* Create a DataReader for the nameService Topic
(using the appropriate QoS). */
DataReaderQos nsDrQos = new DataReaderQos();
TopicQos nsQos = new TopicQos();
nameServiceTopic.GetQos(ref nsQos);
multiSub.CopyFromTopicQos(ref nsDrQos, nsQos);
parentReader = multiSub.CreateDataReader(nameServiceTopic, nsDrQos);
ErrorHandler.checkHandle(parentReader, "DDS.Subscriber.CreateDatareader (NameService)");
/* Narrow the abstract parent into its typed representative. */
nameServiceDR = parentReader as NameServiceDataReader;
/* Define the SQL expression (using a parameterized value). */
nameFinderExpr = "userID = %0";
/* Allocate and assign the query parameters. */
nameFinderParams = new string[1];
nameFinderParams[0] = expression_parameters[0];
/* Create a QueryCondition to only read corresponding
nameService information by key-value. */
nameFinder = nameServiceDR.CreateQueryCondition(
SampleStateKind.Any,
ViewStateKind.Any,
InstanceStateKind.Any,
nameFinderExpr,
nameFinderParams);
ErrorHandler.checkHandle(
nameFinder, "DDS.DataReader.create_querycondition (nameFinder)");
/* Create the Topic that simulates the multi-topic
(use Qos from chatMessage).*/
status = chatMessageTopic.GetQos(ref namedMessageQos);
ErrorHandler.checkStatus(status, "DDS.Topic.GetQos");
/* Create the NamedMessage Topic whose samples simulate
the MultiTopic */
namedMessageTopic = realParticipant.CreateTopic(
"Chat_NamedMessage",
type_name,
namedMessageQos);
ErrorHandler.checkHandle(
namedMessageTopic,
"DDS.DomainParticipant.CreateTopic (NamedMessage)");
/* Adapt the default PublisherQos to write into the
"ChatRoom" Partition. */
status = realParticipant.GetDefaultPublisherQos(ref pubQos);
ErrorHandler.checkStatus(
status, "DDS.DomainParticipant.get_default_publisher_qos");
pubQos.Partition.Name = new string[1];
pubQos.Partition.Name[0] = partitionName;
/* Create a private Publisher for the multitopic simulator. */
multiPub = realParticipant.CreatePublisher(pubQos);
ErrorHandler.checkHandle(
multiPub,
"DDS.DomainParticipant.create_publisher (for multitopic)");
DataWriterQos nmDwQos = new DataWriterQos();
TopicQos nmQos = new TopicQos();
multiPub.GetDefaultDataWriterQos(ref nmDwQos);
namedMessageTopic.GetQos(ref nmQos);
multiPub.CopyFromTopicQos(ref nmDwQos, nmQos);
/* Create a DataWriter for the multitopic. */
parentWriter = multiPub.CreateDataWriter(namedMessageTopic, nmDwQos);
ErrorHandler.checkHandle(
parentWriter, "DDS.Publisher.CreateDatawriter (NamedMessage)");
/* Narrow the abstract parent into its typed representative. */
namedMessageDW = parentWriter as NamedMessageDataWriter;
/* Store the relevant Entities in our Listener. */
msgListener.ChatMessageDR = chatMessageDR;
msgListener.NameServiceDR = nameServiceDR;
msgListener.NamedMessageDW = namedMessageDW;
msgListener.NameFinder = nameFinder;
msgListener.NameFinderParams = nameFinderParams;
/* Return the simulated Multitopic. */
return namedMessageTopic;
}
static void Main(string[] args)
{
int ownID = 1;
string chatterName = null;
int domain = DDS.DomainId.Default;
string partitionName = "ChatRoom";
/* Options: Chatter [ownID [name]] */
if (args.Length > 0)
{
ownID = int.Parse(args[0]);
if (args.Length > 1)
{
chatterName = args[1];
}
}
/* Create a DomainParticipantFactory and a DomainParticipant
* (using Default QoS settings. */
DomainParticipantFactory dpf = DomainParticipantFactory.Instance;
ErrorHandler.checkHandle(dpf, "DDS.DomainParticipantFactory.Instance");
IDomainParticipant participant = dpf.CreateParticipant(domain, null, StatusKind.Any);
ErrorHandler.checkHandle(participant, "DDS.DomainParticipantFactory.CreateParticipant");
/* Register the required datatype for ChatMessage. */
ChatMessageTypeSupport chatMessageTS = new ChatMessageTypeSupport();
string chatMessageTypeName = chatMessageTS.TypeName;
ReturnCode status = chatMessageTS.RegisterType(
participant, chatMessageTypeName);
ErrorHandler.checkStatus(
status, "Chat.ChatMessageTypeSupport.RegisterType");
/* Register the required datatype for NameService. */
NameServiceTypeSupport nameServiceTS = new NameServiceTypeSupport();
string nameServiceTypeName = nameServiceTS.TypeName;
status = nameServiceTS.RegisterType(
participant, nameServiceTypeName);
ErrorHandler.checkStatus(
status, "Chat.NameServiceTypeSupport.RegisterType");
/* Initialise Qos variables */
TopicQos reliableTopicQos = new TopicQos();
TopicQos settingTopicQos = new TopicQos();
PublisherQos pubQos = new PublisherQos();
DataWriterQos dwQos = new DataWriterQos();
DataWriterQos nsDwQos = new DataWriterQos();
/* Set the ReliabilityQosPolicy to RELIABLE. */
status = participant.GetDefaultTopicQos(ref reliableTopicQos);
ErrorHandler.checkStatus(
status, "DDS.DomainParticipant.GetDefaultTopicQos");
reliableTopicQos.Reliability.Kind = ReliabilityQosPolicyKind.ReliableReliabilityQos;
/* Make the tailored QoS the new default. */
status = participant.SetDefaultTopicQos(reliableTopicQos);
ErrorHandler.checkStatus(
status, "DDS.DomainParticipant.SetDefaultTopicQos");
/* Use the changed policy when defining the ChatMessage topic */
ITopic chatMessageTopic = participant.CreateTopic(
"Chat_ChatMessage",
chatMessageTypeName,
reliableTopicQos);
ErrorHandler.checkHandle(
chatMessageTopic,
"DDS.DomainParticipant.CreateTopic (ChatMessage)");
/* Set the DurabilityQosPolicy to TRANSIENT. */
status = participant.GetDefaultTopicQos(ref settingTopicQos);
ErrorHandler.checkStatus(
status, "DDS.DomainParticipant.GetDefaultTopicQos");
settingTopicQos.Durability.Kind = DurabilityQosPolicyKind.TransientDurabilityQos;
/* Create the NameService Topic. */
ITopic nameServiceTopic = participant.CreateTopic(
"Chat_NameService",
nameServiceTypeName,
settingTopicQos);
ErrorHandler.checkHandle(
nameServiceTopic,
"DDS.DomainParticipant.CreateTopic (NameService)");
/* Adapt the default PublisherQos to write into the
* "ChatRoom" Partition. */
status = participant.GetDefaultPublisherQos(ref pubQos);
ErrorHandler.checkStatus(
status, "DDS.DomainParticipant.GetDefaultPublisherQos");
pubQos.Partition.Name = new string[1];
pubQos.Partition.Name[0] = partitionName;
/* Create a Publisher for the chatter application. */
IPublisher chatPublisher = participant.CreatePublisher(pubQos);
ErrorHandler.checkHandle(
chatPublisher, "DDS.DomainParticipant.CreatePublisher");
/* Create a DataWriter for the ChatMessage Topic
* (using the appropriate QoS). */
chatPublisher.GetDefaultDataWriterQos(ref dwQos);
status = chatPublisher.CopyFromTopicQos(ref dwQos, reliableTopicQos);
ErrorHandler.checkStatus(status, "DDS.Publisher.CopyFromTopicQos");
IDataWriter parentWriter = chatPublisher.CreateDataWriter(chatMessageTopic, dwQos);
ErrorHandler.checkHandle(
parentWriter, "DDS.Publisher.CreateDatawriter (chatMessage)");
/* Narrow the abstract parent into its typed representative. */
ChatMessageDataWriter talker = parentWriter as ChatMessageDataWriter;
ErrorHandler.checkHandle(
talker, "Chat.ChatMessageDataWriter");
/* Create a DataWriter for the NameService Topic
* (using the appropriate QoS). */
status = chatPublisher.GetDefaultDataWriterQos(ref nsDwQos);
ErrorHandler.checkStatus(
status, "DDS.Publisher.GetDefaultDatawriterQos");
status = chatPublisher.CopyFromTopicQos(ref nsDwQos, settingTopicQos);
ErrorHandler.checkStatus(status, "DDS.Publisher.CopyFromTopicQos");
WriterDataLifecycleQosPolicy writerDataLifecycle = nsDwQos.WriterDataLifecycle;
writerDataLifecycle.AutodisposeUnregisteredInstances = false;
IDataWriter nsParentWriter = chatPublisher.CreateDataWriter(nameServiceTopic, nsDwQos);
ErrorHandler.checkHandle(
nsParentWriter, "DDS.Publisher.CreateDatawriter (NameService)");
/* Narrow the abstract parent into its typed representative. */
NameServiceDataWriter nameServer = nsParentWriter as NameServiceDataWriter;
ErrorHandler.checkHandle(
nameServer, "Chat.NameServiceDataWriterHelper");
/* Initialize the NameServer attributes. */
NameService ns = new NameService();
ns.userID = ownID;
if (chatterName != null)
{
ns.name = chatterName;
}
else
{
ns.name = "Chatter " + ownID;
}
/* Write the user-information into the system
* (registering the instance implicitly). */
status = nameServer.Write(ns);
ErrorHandler.checkStatus(status, "Chat.ChatMessageDataWriter.Write");
/* Initialize the chat messages. */
ChatMessage msg = new ChatMessage();
msg.userID = ownID;
msg.index = 0;
if (ownID == TERMINATION_MESSAGE)
{
msg.content = "Termination message.";
}
else
{
msg.content = "Hi there, I will send you " +
NUM_MSG + " more messages.";
}
System.Console.WriteLine("Writing message: \"" + msg.content + "\"");
/* Register a chat message for this user
* (pre-allocating resources for it!!) */
InstanceHandle userHandle = talker.RegisterInstance(msg);
/* Write a message using the pre-generated instance handle. */
status = talker.Write(msg, userHandle);
ErrorHandler.checkStatus(status, "Chat.ChatMessageDataWriter.Write");
Thread.Sleep(1000);
/* Write any number of messages . */
for (int i = 1; i <= NUM_MSG && ownID != TERMINATION_MESSAGE; i++)
{
msg.index = i;
msg.content = "Message no. " + i;
Console.WriteLine("Writing message: \"" + msg.content + "\"");
status = talker.Write(msg, userHandle);
ErrorHandler.checkStatus(status, "Chat.ChatMessageDataWriter.Write");
Thread.Sleep(1000); /* do not run so fast! */
}
/* Leave the room by disposing and unregistering the message instance */
status = talker.Dispose(msg, userHandle);
ErrorHandler.checkStatus(
status, "Chat.ChatMessageDataWriter.Dispose");
status = talker.UnregisterInstance(msg, userHandle);
ErrorHandler.checkStatus(
status, "Chat.ChatMessageDataWriter.unregister_instance");
/* Also unregister our name. */
status = nameServer.UnregisterInstance(ns, InstanceHandle.Nil);
ErrorHandler.checkStatus(
status, "Chat.NameServiceDataWriter.unregister_instance");
/* Remove the DataWriters */
status = chatPublisher.DeleteDataWriter(talker);
ErrorHandler.checkStatus(
status, "DDS.Publisher.DeleteDatawriter (talker)");
status = chatPublisher.DeleteDataWriter(nameServer);
ErrorHandler.checkStatus(status,
"DDS.Publisher.DeleteDatawriter (nameServer)");
/* Remove the Publisher. */
status = participant.DeletePublisher(chatPublisher);
ErrorHandler.checkStatus(
status, "DDS.DomainParticipant.DeletePublisher");
/* Remove the Topics. */
status = participant.DeleteTopic(nameServiceTopic);
ErrorHandler.checkStatus(
status, "DDS.DomainParticipant.DeleteTopic (nameServiceTopic)");
status = participant.DeleteTopic(chatMessageTopic);
ErrorHandler.checkStatus(
status, "DDS.DomainParticipant.DeleteTopic (chatMessageTopic)");
/* Remove the DomainParticipant. */
status = dpf.DeleteParticipant(participant);
ErrorHandler.checkStatus(
status, "DDS.DomainParticipantFactory.DeleteParticipant");
}
