static void Main(string[] args)
{
string partitionName = "ChatRoom";
int domain = DDS.DomainId.Default;
/* Options: MessageBoard [ownID] */
/* Messages having owner ownID will be ignored */
string[] parameterList = new string[1];
if (args.Length > 0)
{
parameterList[0] = args[0];
}
else
{
parameterList[0] = "0";
}
/* Create a DomainParticipantFactory and a DomainParticipant
* (using Default QoS settings. */
DomainParticipantFactory dpf = DomainParticipantFactory.Instance;
ErrorHandler.checkHandle(
dpf, "DDS.DomainParticipantFactory.Instance");
IDomainParticipant parentDP = dpf.CreateParticipant(
domain, null, StatusKind.Any);
ErrorHandler.checkHandle(
parentDP, "DDS.DomainParticipantFactory.CreateParticipant");
/* Register the required datatype for ChatMessage. */
ChatMessageTypeSupport chatMessageTS = new ChatMessageTypeSupport();
string chatMessageTypeName = chatMessageTS.TypeName;
ReturnCode status = chatMessageTS.RegisterType(parentDP, chatMessageTypeName);
ErrorHandler.checkStatus(
status, "Chat.ChatMessageTypeSupport.RegisterType");
/* Register the required datatype for NameService. */
NameServiceTypeSupport nameServiceTS = new NameServiceTypeSupport();
ErrorHandler.checkHandle(
nameServiceTS, "new NameServiceTypeSupport");
string nameServiceTypeName = nameServiceTS.TypeName;
status = nameServiceTS.RegisterType(parentDP, nameServiceTypeName);
ErrorHandler.checkStatus(
status, "Chat.NameServiceTypeSupport.RegisterType");
/* Register the required datatype for NamedMessage. */
NamedMessageTypeSupport namedMessageTS = new NamedMessageTypeSupport();
ErrorHandler.checkHandle(
namedMessageTS, "new NamedMessageTypeSupport");
string namedMessageTypeName = namedMessageTS.TypeName;
status = namedMessageTS.RegisterType(parentDP, namedMessageTypeName);
ErrorHandler.checkStatus(
status, "Chat.NamedMessageTypeSupport.RegisterType");
/* Narrow the normal participant to its extended representative */
ExtDomainParticipant participant = new ExtDomainParticipant(parentDP);
/* Initialise QoS variables */
TopicQos reliableTopicQos = new TopicQos();
TopicQos settingTopicQos = new TopicQos();
SubscriberQos subQos = new SubscriberQos();
/* 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)");
/* Create a multitopic that substitutes the userID
* with its corresponding userName. */
ITopic namedMessageTopic = participant.CreateSimulatedMultitopic(
"Chat_NamedMessage",
namedMessageTypeName,
"SELECT userID, name AS userName, index, content " +
"FROM Chat_NameService NATURAL JOIN Chat_ChatMessage " +
"WHERE userID <> %0",
parameterList);
ErrorHandler.checkHandle(
namedMessageTopic,
"ExtDomainParticipant.create_simulated_multitopic");
/* Adapt the default SubscriberQos to read from the "ChatRoom" Partition. */
status = participant.GetDefaultSubscriberQos(ref subQos);
ErrorHandler.checkStatus(
status, "DDS.DomainParticipant.GetDefaultSubscriberQos");
subQos.Partition.Name = new string[1];
subQos.Partition.Name[0] = partitionName;
/* Create a Subscriber for the MessageBoard application. */
ISubscriber chatSubscriber = participant.CreateSubscriber(subQos);
ErrorHandler.checkHandle(
chatSubscriber, "DDS.DomainParticipant.CreateSubscriber");
/* Create a DataReader for the NamedMessage Topic
* (using the appropriate QoS). */
IDataReader parentReader = chatSubscriber.CreateDataReader(
namedMessageTopic);
ErrorHandler.checkHandle(
parentReader, "DDS.Subscriber.CreateDatareader");
NamedMessageDataReader chatAdmin = parentReader as NamedMessageDataReader;
/* Print a message that the MessageBoard has opened. */
System.Console.WriteLine(
"MessageBoard has opened: send a ChatMessage " +
"with userID = -1 to close it....\n");
bool terminated = false;
NamedMessage[] messages = null;;
SampleInfo[] infos = null;
while (!terminated)
{
/* Note: using read does not remove the samples from
* unregistered instances from the DataReader. This means
* that the DataRase would use more and more resources.
* That's why we use take here instead. */
status = chatAdmin.Take(
ref messages,
ref infos,
SampleStateKind.Any,
ViewStateKind.Any,
InstanceStateKind.Alive);
ErrorHandler.checkStatus(
status, "Chat.NamedMessageDataReader.take");
foreach (NamedMessage msg in messages)
{
if (msg.userID == TERMINATION_MESSAGE)
{
System.Console.WriteLine("Termination message received: exiting...");
terminated = true;
}
else
{
System.Console.WriteLine("{0}: {1}", msg.userName, msg.content);
}
}
status = chatAdmin.ReturnLoan(ref messages, ref infos);
ErrorHandler.checkStatus(status, "Chat.ChatMessageDataReader.ReturnLoan");
System.Threading.Thread.Sleep(100);
}
/* Remove the DataReader */
status = chatSubscriber.DeleteDataReader(chatAdmin);
ErrorHandler.checkStatus(
status, "DDS.Subscriber.DeleteDatareader");
/* Remove the Subscriber. */
status = participant.DeleteSubscriber(chatSubscriber);
ErrorHandler.checkStatus(
status, "DDS.DomainParticipant.DeleteSubscriber");
/* Remove the Topics. */
status = participant.DeleteSimulatedMultitopic(namedMessageTopic);
ErrorHandler.checkStatus(
status, "DDS.ExtDomainParticipant.DeleteSimulatedMultitopic");
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(parentDP);
ErrorHandler.checkStatus(
status, "DDS.DomainParticipantFactory.DeleteParticipant");
}
static void Main(string[] args)
{
int domain = DDS.DomainId.Default;
/* Create a DomainParticipant */
DomainParticipantFactory dpf = 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();
ErrorHandler.checkHandle(
nameServiceTS, "new NameServiceTypeSupport");
string nameServiceTypeName = nameServiceTS.TypeName;
status = nameServiceTS.RegisterType(
participant, nameServiceTypeName);
ErrorHandler.checkStatus(
status, "Chat.NameServiceTypeSupport.RegisterType");
/* Set the ReliabilityQosPolicy to RELIABLE. */
TopicQos reliableTopicQos = new TopicQos();
status = participant.GetDefaultTopicQos(ref reliableTopicQos);
ErrorHandler.checkStatus(
status, "DDS.DomainParticipant.get_DefaultTopicQos");
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. */
TopicQos settingTopicQos = new TopicQos();
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");
/* Adapt the default SubscriberQos to read from the
* "ChatRoom" Partition. */
SubscriberQos subQos = new SubscriberQos();
status = participant.GetDefaultSubscriberQos(ref subQos);
ErrorHandler.checkStatus(
status, "DDS.DomainParticipant.GetDefaultSubscriberQos");
subQos.Partition.Name = new string[1];
subQos.Partition.Name[0] = "ChatRoom";
/* Create a Subscriber for the UserLoad application. */
ISubscriber chatSubscriber = participant.CreateSubscriber(subQos);
ErrorHandler.checkHandle(
chatSubscriber, "DDS.DomainParticipant.CreateSubscriber");
/* Create a DataReader for the NameService Topic
* (using the appropriate QoS). */
DataReaderQos nsQos = null;
status = chatSubscriber.GetDefaultDataReaderQos(ref nsQos);
ErrorHandler.checkStatus(
status, "DDS.Subscriber.GetDefaultDataReaderQos");
status = chatSubscriber.CopyFromTopicQos(ref nsQos, settingTopicQos);
ErrorHandler.checkStatus(
status, "DDS.Subscriber.CopyFromTopicQos");
IDataReader parentReader = chatSubscriber.CreateDataReader(
nameServiceTopic,
nsQos,
null,
StatusKind.Any);
ErrorHandler.checkHandle(
parentReader, "DDS.Subscriber.CreateDatareader (NameService)");
NameServiceDataReader nameServer = parentReader as NameServiceDataReader;
/* Adapt the DataReaderQos for the ChatMessageDataReader to
* keep track of all messages. */
DataReaderQos messageQos = new DataReaderQos();
status = chatSubscriber.GetDefaultDataReaderQos(ref messageQos);
ErrorHandler.checkStatus(
status, "DDS.Subscriber.GetDefaultDataReaderQos");
status = chatSubscriber.CopyFromTopicQos(
ref messageQos, reliableTopicQos);
ErrorHandler.checkStatus(
status, "DDS.Subscriber.CopyFromTopicQos");
messageQos.History.Kind = HistoryQosPolicyKind.KeepAllHistoryQos;
/* Create a DataReader for the ChatMessage Topic
* (using the appropriate QoS). */
parentReader = chatSubscriber.CreateDataReader(
chatMessageTopic,
messageQos);
ErrorHandler.checkHandle(
parentReader, "DDS.Subscriber.CreateDataReader (ChatMessage)");
/* Narrow the abstract parent into its typed representative. */
ChatMessageDataReader loadAdmin = parentReader as ChatMessageDataReader;
/* Initialize the Query Arguments. */
string[] parameters = { "0" };
/* Create a QueryCondition that will contain all messages
* with userID=ownID */
IQueryCondition singleUser = loadAdmin.CreateQueryCondition("userID=%0", parameters);
ErrorHandler.checkHandle(singleUser, "DDS.DataReader.CreateQuerycondition");
/* Create a ReadCondition that will contain new users only */
IReadCondition newUser = nameServer.CreateReadCondition(SampleStateKind.NotRead, ViewStateKind.New, InstanceStateKind.Alive);
ErrorHandler.checkHandle(newUser, "DDS.DataReader.create_readcondition");
/* Obtain a StatusCondition that triggers only when a Writer
* changes Liveliness */
IStatusCondition leftUser = loadAdmin.StatusCondition;
ErrorHandler.checkHandle(leftUser, "DDS.DataReader.GetStatusCondition");
status = leftUser.SetEnabledStatuses(StatusKind.LivelinessChanged);
ErrorHandler.checkStatus(status, "DDS.StatusCondition.SetEnabledStatuses");
/* Create a bare guard which will be used to close the room */
escape = new GuardCondition();
/* Create a waitset and add the ReadConditions */
WaitSet userLoadWS = new WaitSet();
status = userLoadWS.AttachCondition(newUser);
ErrorHandler.checkStatus(status, "DDS.WaitSet.AttachCondition (newUser)");
status = userLoadWS.AttachCondition(leftUser);
ErrorHandler.checkStatus(status, "DDS.WaitSet.AttachCondition (leftUser)");
status = userLoadWS.AttachCondition(escape);
ErrorHandler.checkStatus(status, "DDS.WaitSet.AttachCondition (escape)");
/* Initialize and pre-allocate the GuardList used to obtain
* the triggered Conditions. */
ICondition[] guardList = new ICondition[3];
/* Remove all known Users that are not currently active. */
NameService[] nsMsgs = null;
SampleInfo[] nsInfos = null;
status = nameServer.Take(ref nsMsgs,
ref nsInfos,
Length.Unlimited,
SampleStateKind.Any,
ViewStateKind.Any,
InstanceStateKind.NotAlive);
ErrorHandler.checkStatus(
status, "Chat.NameServiceDataReader.Take");
status = nameServer.ReturnLoan(ref nsMsgs, ref nsInfos);
ErrorHandler.checkStatus(
status, "Chat.NameServiceDataReader.ReturnLoan");
/* Start the sleeper thread. */
new Thread(new UserLoad().doWait).Start();
bool closed = false;
int prevCount = 0;
ChatMessage[] msgs = null;
SampleInfo[] msgInfos = null;
while (!closed)
{
/* Wait until at least one of the Conditions in the
* waitset triggers. */
status = userLoadWS.Wait(ref guardList, Duration.Infinite);
ErrorHandler.checkStatus(status, "DDS.WaitSet.Wait");
/* Walk over all guards to display information */
foreach (ICondition guard in guardList)
{
if (guard == newUser)
{
/* The newUser ReadCondition contains data */
status = nameServer.ReadWithCondition(ref nsMsgs, ref nsInfos, newUser);
ErrorHandler.checkStatus(status, "Chat.NameServiceDataReader.read_w_condition");
foreach (NameService ns in nsMsgs)
{
Console.WriteLine("New user: "******"Chat.NameServiceDataReader.ReturnLoan");
}
else if (guard == leftUser)
{
// Some liveliness has changed (either a DataWriter
// joined or a DataWriter left)
LivelinessChangedStatus livelinessStatus = new LivelinessChangedStatus();
status = loadAdmin.GetLivelinessChangedStatus(ref livelinessStatus);
ErrorHandler.checkStatus(status, "DDS.DataReader.getLivelinessChangedStatus");
if (livelinessStatus.AliveCount < prevCount)
{
/* A user has left the ChatRoom, since a DataWriter
* lost its liveliness. Take the effected users
* so they will not appear in the list later on. */
status = nameServer.Take(
ref nsMsgs,
ref nsInfos,
Length.Unlimited,
SampleStateKind.Any,
ViewStateKind.Any,
InstanceStateKind.NotAliveNoWriters);
ErrorHandler.checkStatus(status, "Chat.NameServiceDataReader.Take");
foreach (NameService nsMsg in nsMsgs)
{
/* re-apply query arguments */
parameters[0] = nsMsg.userID.ToString();
status = singleUser.SetQueryParameters(parameters);
ErrorHandler.checkStatus(status, "DDS.QueryCondition.SetQueryParameters");
/* Read this user's history */
status = loadAdmin.TakeWithCondition(
ref msgs,
ref msgInfos,
singleUser);
ErrorHandler.checkStatus(
status,
"Chat.ChatMessageDataReader.TakeWithCondition");
/* Display the user and his history */
Console.WriteLine("Departed user {0} has sent {1} messages ", nsMsg.name, msgs.Length);
status = loadAdmin.ReturnLoan(ref msgs, ref msgInfos);
ErrorHandler.checkStatus(status, "Chat.ChatMessageDataReader.ReturnLoan");
}
status = nameServer.ReturnLoan(ref nsMsgs, ref nsInfos);
ErrorHandler.checkStatus(status, "Chat.NameServiceDataReader.ReturnLoan");
}
prevCount = livelinessStatus.AliveCount;
}
else if (guard == escape)
{
Console.WriteLine("UserLoad has terminated.");
closed = true;
}
else
{
//System.Diagnostics.Debug.Fail("Unknown Condition");
}
} /* for */
} /* while (!closed) */
/* Remove all Conditions from the WaitSet. */
status = userLoadWS.DetachCondition(escape);
ErrorHandler.checkStatus(status, "DDS.WaitSet.DetachCondition (escape)");
status = userLoadWS.DetachCondition(leftUser);
ErrorHandler.checkStatus(status, "DDS.WaitSet.DetachCondition (leftUser)");
status = userLoadWS.DetachCondition(newUser);
ErrorHandler.checkStatus(status, "DDS.WaitSet.DetachCondition (newUser)");
/* Free all resources */
status = participant.DeleteContainedEntities();
ErrorHandler.checkStatus(status, "DDS.DomainParticipant.DeleteContainedEntities");
status = dpf.DeleteParticipant(participant);
ErrorHandler.checkStatus(status, "DDS.DomainParticipantFactory.DeleteParticipant");
}
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");
}
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");
}
static void Main(string[] args)
{
string domain = null;
/* Create a DomainParticipant */
DomainParticipantFactory dpf = 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();
ErrorHandler.checkHandle(
nameServiceTS, "new NameServiceTypeSupport");
string nameServiceTypeName = nameServiceTS.TypeName;
status = nameServiceTS.RegisterType(
participant, nameServiceTypeName);
ErrorHandler.checkStatus(
status, "Chat.NameServiceTypeSupport.RegisterType");
/* Set the ReliabilityQosPolicy to RELIABLE. */
TopicQos reliableTopicQos = new TopicQos();
status = participant.GetDefaultTopicQos(ref reliableTopicQos);
ErrorHandler.checkStatus(
status, "DDS.DomainParticipant.get_DefaultTopicQos");
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. */
TopicQos settingTopicQos = new TopicQos();
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");
/* Adapt the default SubscriberQos to read from the
"ChatRoom" Partition. */
SubscriberQos subQos = new SubscriberQos();
status = participant.GetDefaultSubscriberQos(ref subQos);
ErrorHandler.checkStatus(
status, "DDS.DomainParticipant.GetDefaultSubscriberQos");
subQos.Partition.Name = new string[1];
subQos.Partition.Name[0] = "ChatRoom";
/* Create a Subscriber for the UserLoad application. */
ISubscriber chatSubscriber = participant.CreateSubscriber(subQos);
ErrorHandler.checkHandle(
chatSubscriber, "DDS.DomainParticipant.CreateSubscriber");
/* Create a DataReader for the NameService Topic
(using the appropriate QoS). */
DataReaderQos nsQos = null;
status = chatSubscriber.GetDefaultDataReaderQos(ref nsQos);
ErrorHandler.checkStatus(
status, "DDS.Subscriber.GetDefaultDataReaderQos");
status = chatSubscriber.CopyFromTopicQos(ref nsQos, settingTopicQos);
ErrorHandler.checkStatus(
status, "DDS.Subscriber.CopyFromTopicQos");
IDataReader parentReader = chatSubscriber.CreateDataReader(
nameServiceTopic,
nsQos,
null,
StatusKind.Any);
ErrorHandler.checkHandle(
parentReader, "DDS.Subscriber.CreateDatareader (NameService)");
NameServiceDataReader nameServer = parentReader as NameServiceDataReader;
/* Adapt the DataReaderQos for the ChatMessageDataReader to
keep track of all messages. */
DataReaderQos messageQos = new DataReaderQos();
status = chatSubscriber.GetDefaultDataReaderQos(ref messageQos);
ErrorHandler.checkStatus(
status, "DDS.Subscriber.GetDefaultDataReaderQos");
status = chatSubscriber.CopyFromTopicQos(
ref messageQos, reliableTopicQos);
ErrorHandler.checkStatus(
status, "DDS.Subscriber.CopyFromTopicQos");
messageQos.History.Kind = HistoryQosPolicyKind.KeepAllHistoryQos;
/* Create a DataReader for the ChatMessage Topic
(using the appropriate QoS). */
parentReader = chatSubscriber.CreateDataReader(
chatMessageTopic,
messageQos);
ErrorHandler.checkHandle(
parentReader, "DDS.Subscriber.CreateDataReader (ChatMessage)");
/* Narrow the abstract parent into its typed representative. */
ChatMessageDataReader loadAdmin = parentReader as ChatMessageDataReader;
/* Initialize the Query Arguments. */
string[] parameters = { "0" };
/* Create a QueryCondition that will contain all messages
with userID=ownID */
IQueryCondition singleUser = loadAdmin.CreateQueryCondition("userID=%0", parameters);
ErrorHandler.checkHandle(singleUser, "DDS.DataReader.CreateQuerycondition");
/* Create a ReadCondition that will contain new users only */
IReadCondition newUser = nameServer.CreateReadCondition(SampleStateKind.NotRead, ViewStateKind.New, InstanceStateKind.Alive);
ErrorHandler.checkHandle(newUser, "DDS.DataReader.create_readcondition");
/* Obtain a StatusCondition that triggers only when a Writer
changes Liveliness */
IStatusCondition leftUser = loadAdmin.StatusCondition;
ErrorHandler.checkHandle(leftUser, "DDS.DataReader.GetStatusCondition");
status = leftUser.SetEnabledStatuses(StatusKind.LivelinessChanged);
ErrorHandler.checkStatus(status, "DDS.StatusCondition.SetEnabledStatuses");
/* Create a bare guard which will be used to close the room */
escape = new GuardCondition();
/* Create a waitset and add the ReadConditions */
WaitSet userLoadWS = new WaitSet();
status = userLoadWS.AttachCondition(newUser);
ErrorHandler.checkStatus(status, "DDS.WaitSet.AttachCondition (newUser)");
status = userLoadWS.AttachCondition(leftUser);
ErrorHandler.checkStatus(status, "DDS.WaitSet.AttachCondition (leftUser)");
status = userLoadWS.AttachCondition(escape);
ErrorHandler.checkStatus(status, "DDS.WaitSet.AttachCondition (escape)");
/* Initialize and pre-allocate the GuardList used to obtain
the triggered Conditions. */
ICondition[] guardList = new ICondition[3];
/* Remove all known Users that are not currently active. */
NameService[] nsMsgs = null;
SampleInfo[] nsInfos = null;
status = nameServer.Take(ref nsMsgs,
ref nsInfos,
Length.Unlimited,
SampleStateKind.Any,
ViewStateKind.Any,
InstanceStateKind.NotAlive);
ErrorHandler.checkStatus(
status, "Chat.NameServiceDataReader.Take");
status = nameServer.ReturnLoan(ref nsMsgs, ref nsInfos);
ErrorHandler.checkStatus(
status, "Chat.NameServiceDataReader.ReturnLoan");
/* Start the sleeper thread. */
new Thread(new UserLoad().doWait).Start();
bool closed = false;
int prevCount = 0;
ChatMessage[] msgs = null;
SampleInfo[] msgInfos = null;
while (!closed)
{
/* Wait until at least one of the Conditions in the
waitset triggers. */
status = userLoadWS.Wait(ref guardList, Duration.Infinite);
ErrorHandler.checkStatus(status, "DDS.WaitSet.Wait");
/* Walk over all guards to display information */
foreach (ICondition guard in guardList)
{
if (guard == newUser)
{
/* The newUser ReadCondition contains data */
status = nameServer.ReadWithCondition(ref nsMsgs, ref nsInfos, newUser);
ErrorHandler.checkStatus(status, "Chat.NameServiceDataReader.read_w_condition");
foreach (NameService ns in nsMsgs)
{
Console.WriteLine("New user: "******"Chat.NameServiceDataReader.ReturnLoan");
}
else if (guard == leftUser)
{
// Some liveliness has changed (either a DataWriter
// joined or a DataWriter left)
LivelinessChangedStatus livelinessStatus = new LivelinessChangedStatus() ;
status = loadAdmin.GetLivelinessChangedStatus(ref livelinessStatus);
ErrorHandler.checkStatus(status, "DDS.DataReader.getLivelinessChangedStatus");
if (livelinessStatus.AliveCount < prevCount)
{
/* A user has left the ChatRoom, since a DataWriter
lost its liveliness. Take the effected users
so they will not appear in the list later on. */
status = nameServer.Take(
ref nsMsgs,
ref nsInfos,
Length.Unlimited,
SampleStateKind.Any,
ViewStateKind.Any,
InstanceStateKind.NotAliveNoWriters);
ErrorHandler.checkStatus(status, "Chat.NameServiceDataReader.Take");
foreach (NameService nsMsg in nsMsgs)
{
/* re-apply query arguments */
parameters[0] = nsMsg.userID.ToString();
status = singleUser.SetQueryParameters(parameters);
ErrorHandler.checkStatus(status, "DDS.QueryCondition.SetQueryParameters");
/* Read this user's history */
status = loadAdmin.TakeWithCondition(
ref msgs,
ref msgInfos,
singleUser);
ErrorHandler.checkStatus(
status,
"Chat.ChatMessageDataReader.TakeWithCondition");
/* Display the user and his history */
Console.WriteLine("Departed user {0} has sent {1} messages ", nsMsg.name, msgs.Length);
status = loadAdmin.ReturnLoan(ref msgs, ref msgInfos);
ErrorHandler.checkStatus(status, "Chat.ChatMessageDataReader.ReturnLoan");
}
status = nameServer.ReturnLoan(ref nsMsgs, ref nsInfos);
ErrorHandler.checkStatus(status, "Chat.NameServiceDataReader.ReturnLoan");
}
prevCount = livelinessStatus.AliveCount;
}
else if (guard == escape)
{
Console.WriteLine("UserLoad has terminated.");
closed = true;
}
else
{
//System.Diagnostics.Debug.Fail("Unknown Condition");
}
} /* for */
} /* while (!closed) */
/* Remove all Conditions from the WaitSet. */
status = userLoadWS.DetachCondition(escape);
ErrorHandler.checkStatus(status, "DDS.WaitSet.DetachCondition (escape)");
status = userLoadWS.DetachCondition(leftUser);
ErrorHandler.checkStatus(status, "DDS.WaitSet.DetachCondition (leftUser)");
status = userLoadWS.DetachCondition(newUser);
ErrorHandler.checkStatus(status, "DDS.WaitSet.DetachCondition (newUser)");
/* Free all resources */
status = participant.DeleteContainedEntities();
ErrorHandler.checkStatus(status, "DDS.DomainParticipant.DeleteContainedEntities");
status = dpf.DeleteParticipant(participant);
ErrorHandler.checkStatus(status, "DDS.DomainParticipantFactory.DeleteParticipant");
}
static void Main(string[] args)
{
string partitionName = "ChatRoom";
int domain = DDS.DomainId.Default;
/* Options: MessageBoard [ownID] */
/* Messages having owner ownID will be ignored */
string[] parameterList = new string[1];
if (args.Length > 0)
{
parameterList[0] = args[0];
}
else
{
parameterList[0] = "0";
}
/* Create a DomainParticipantFactory and a DomainParticipant
(using Default QoS settings. */
DomainParticipantFactory dpf = DomainParticipantFactory.Instance;
ErrorHandler.checkHandle(
dpf, "DDS.DomainParticipantFactory.Instance");
IDomainParticipant parentDP = dpf.CreateParticipant(
domain, null, StatusKind.Any);
ErrorHandler.checkHandle(
parentDP, "DDS.DomainParticipantFactory.CreateParticipant");
/* Register the required datatype for ChatMessage. */
ChatMessageTypeSupport chatMessageTS = new ChatMessageTypeSupport();
string chatMessageTypeName = chatMessageTS.TypeName;
ReturnCode status = chatMessageTS.RegisterType(parentDP, chatMessageTypeName);
ErrorHandler.checkStatus(
status, "Chat.ChatMessageTypeSupport.RegisterType");
/* Register the required datatype for NameService. */
NameServiceTypeSupport nameServiceTS = new NameServiceTypeSupport();
ErrorHandler.checkHandle(
nameServiceTS, "new NameServiceTypeSupport");
string nameServiceTypeName = nameServiceTS.TypeName;
status = nameServiceTS.RegisterType(parentDP, nameServiceTypeName);
ErrorHandler.checkStatus(
status, "Chat.NameServiceTypeSupport.RegisterType");
/* Register the required datatype for NamedMessage. */
NamedMessageTypeSupport namedMessageTS = new NamedMessageTypeSupport();
ErrorHandler.checkHandle(
namedMessageTS, "new NamedMessageTypeSupport");
string namedMessageTypeName = namedMessageTS.TypeName;
status = namedMessageTS.RegisterType(parentDP, namedMessageTypeName);
ErrorHandler.checkStatus(
status, "Chat.NamedMessageTypeSupport.RegisterType");
/* Narrow the normal participant to its extended representative */
ExtDomainParticipant participant = new ExtDomainParticipant(parentDP);
/* Initialise QoS variables */
TopicQos reliableTopicQos = new TopicQos();
TopicQos settingTopicQos = new TopicQos();
SubscriberQos subQos = new SubscriberQos();
/* 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)");
/* Create a multitopic that substitutes the userID
with its corresponding userName. */
ITopic namedMessageTopic = participant.CreateSimulatedMultitopic(
"Chat_NamedMessage",
namedMessageTypeName,
"SELECT userID, name AS userName, index, content " +
"FROM Chat_NameService NATURAL JOIN Chat_ChatMessage " +
"WHERE userID <> %0",
parameterList);
ErrorHandler.checkHandle(
namedMessageTopic,
"ExtDomainParticipant.create_simulated_multitopic");
/* Adapt the default SubscriberQos to read from the "ChatRoom" Partition. */
status = participant.GetDefaultSubscriberQos(ref subQos);
ErrorHandler.checkStatus(
status, "DDS.DomainParticipant.GetDefaultSubscriberQos");
subQos.Partition.Name = new string[1];
subQos.Partition.Name[0] = partitionName;
/* Create a Subscriber for the MessageBoard application. */
ISubscriber chatSubscriber = participant.CreateSubscriber(subQos);
ErrorHandler.checkHandle(
chatSubscriber, "DDS.DomainParticipant.CreateSubscriber");
/* Create a DataReader for the NamedMessage Topic
(using the appropriate QoS). */
IDataReader parentReader = chatSubscriber.CreateDataReader(
namedMessageTopic);
ErrorHandler.checkHandle(
parentReader, "DDS.Subscriber.CreateDatareader");
NamedMessageDataReader chatAdmin = parentReader as NamedMessageDataReader;
/* Print a message that the MessageBoard has opened. */
System.Console.WriteLine(
"MessageBoard has opened: send a ChatMessage " +
"with userID = -1 to close it....\n");
bool terminated = false;
NamedMessage[] messages = null;;
SampleInfo[] infos = null;
while (!terminated)
{
/* Note: using read does not remove the samples from
unregistered instances from the DataReader. This means
that the DataRase would use more and more resources.
That's why we use take here instead. */
status = chatAdmin.Take(
ref messages,
ref infos,
SampleStateKind.Any,
ViewStateKind.Any,
InstanceStateKind.Alive);
ErrorHandler.checkStatus(
status, "Chat.NamedMessageDataReader.take");
foreach (NamedMessage msg in messages)
{
if (msg.userID == TERMINATION_MESSAGE)
{
System.Console.WriteLine("Termination message received: exiting...");
terminated = true;
}
else
{
System.Console.WriteLine("{0}: {1}", msg.userName, msg.content);
}
}
status = chatAdmin.ReturnLoan(ref messages, ref infos);
ErrorHandler.checkStatus(status, "Chat.ChatMessageDataReader.ReturnLoan");
System.Threading.Thread.Sleep(100);
}
/* Remove the DataReader */
status = chatSubscriber.DeleteDataReader(chatAdmin);
ErrorHandler.checkStatus(
status, "DDS.Subscriber.DeleteDatareader");
/* Remove the Subscriber. */
status = participant.DeleteSubscriber(chatSubscriber);
ErrorHandler.checkStatus(
status, "DDS.DomainParticipant.DeleteSubscriber");
/* Remove the Topics. */
status = participant.DeleteSimulatedMultitopic(namedMessageTopic);
ErrorHandler.checkStatus(
status, "DDS.ExtDomainParticipant.DeleteSimulatedMultitopic");
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(parentDP);
ErrorHandler.checkStatus(
status, "DDS.DomainParticipantFactory.DeleteParticipant");
}
