/// <summary>
/// Utility method to create a DDS Topic.
/// </summary>
/// <param name="topicName">The Topic name to create the topic with.</param>
/// <param name="exampleNameToCreateTopicFor">The name of the example we are
/// creating the topic for. This is used to define any specific Qos that the example
/// requires.</param>
/// <returns>The newly created Topic</returns>
public ITopic createTopic(String topicName)
{
status = participant.GetDefaultTopicQos(ref topicQos);
ErrorHandler.checkStatus(status, "DomainParticipant.GetDefaultTopicQos");
switch (exampleName)
{
case "ContentFilteredTopic":
case "Durability":
case "HelloWorld":
case "WaitSet":
case "Lifecycle":
topicQos.Reliability.Kind = ReliabilityQosPolicyKind.ReliableReliabilityQos;
if (durabilityKind.Equals("transient"))
{
topicQos.Durability.Kind = DurabilityQosPolicyKind.TransientDurabilityQos;
}
else
{
topicQos.Durability.Kind = DurabilityQosPolicyKind.PersistentDurabilityQos;
}
break;
case "Ownership":
topicQos.Reliability.Kind = ReliabilityQosPolicyKind.ReliableReliabilityQos;
topicQos.Ownership.Kind = OwnershipQosPolicyKind.ExclusiveOwnershipQos;
break;
case "QueryCondition":
topicQos.Reliability.Kind = ReliabilityQosPolicyKind.ReliableReliabilityQos;
break;
case "Listener":
topicQos.Reliability.Kind = ReliabilityQosPolicyKind.ReliableReliabilityQos;
topicQos.Durability.Kind = DurabilityQosPolicyKind.TransientDurabilityQos;
// DeadlineQoSPolicy : period used to trigger the listener
// (on_requested_deadline_missed)
topicQos.Deadline.Period.NanoSec = 0;
topicQos.Deadline.Period.Sec = 5;
break;
default:
Console.WriteLine("Unidentified example to create topic for.");
break;
}
status = participant.SetDefaultTopicQos(topicQos);
ErrorHandler.checkStatus(status, "DomainParticipant.SetDefaultTopicQos");
topic = participant.CreateTopic(
topicName,
typeName,
topicQos,
null,
StatusKind.Any
);
ErrorHandler.checkHandle(topic, "DomainParticipant.CreateTopic");
return(topic);
}
public ReturnCode SetDefaultTopicQos(TopicQos qos)
{
return(realParticipant.SetDefaultTopicQos(qos));
}
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");
}