static void Main(string[] args)
{
DDSEntityManager mgr = new DDSEntityManager("Listener");
ReturnCode status = ReturnCode.Error;
ListenerDataListener myListener;
String partitionName = "Listener Example";
int count = 0;
Duration wait_timeout = new Duration(0, 200000000);
// create Domain Participant
mgr.createParticipant(partitionName);
// create Type
MsgTypeSupport msgTS = new MsgTypeSupport();
mgr.registerType(msgTS);
// create Topic
mgr.createTopic("ListenerData_Msg");
// create Subscriber
mgr.createSubscriber();
// create DataReader
mgr.createReader(false);
IDataReader dreader = mgr.getReader();
myListener = new ListenerDataListener();
myListener.MsgDR = dreader as MsgDataReader;
Console.WriteLine("=== [ListenerDataSubscriber] SetListener");
StatusKind kind = StatusKind.DataAvailable | StatusKind.RequestedDeadlineMissed;
status = myListener.MsgDR.SetListener(myListener, kind);
ErrorHandler.checkStatus(status, "DataReader.SetListener");
Console.WriteLine("=== [ListenerDataSubscriber] Ready...");
myListener.terminated = false;
WaitSet ws = new WaitSet();
ws.AttachCondition(myListener.guardCond);
ICondition[] cond = null;
while (!myListener.terminated && count < 1500)
{
Console.WriteLine("=== [SubscriberUsingListener] waiting waitset ...");
ws.Wait(ref cond, wait_timeout);
myListener.guardCond.SetTriggerValue(false);
++count;
}
Console.WriteLine("===[ListenerDataSubscriber] Market Closed.");
mgr.getSubscriber().DeleteDataReader(myListener.MsgDR);
mgr.deleteSubscriber();
mgr.deleteTopic();
mgr.deleteParticipant();
}
static void Main(string[] args)
{
if (args.Length != 1)
{
Console.WriteLine("*** [ContentFilteredTopicDataSubscriber] Subscription string not specified");
Console.WriteLine("*** usage : ContentFilteredTopicDataSubscriber <subscription_string>");
Environment.Exit(-1);
}
ITopic topic;
DDSEntityManager mgr = new DDSEntityManager();
String partitionName = "ContentFilteredTopic example";
// Create DomainParticipant
mgr.createParticipant(partitionName);
// Create Type
StockTypeSupport msgTS = new StockTypeSupport();
mgr.registerType(msgTS);
// Create Topic
topic = mgr.createTopic("StockTrackerExclusive", "ContentFilteredTopic");
// ContentFilteredTopic
mgr.createContentFilter("MyStockTopic", topic, args[0]);
Console.WriteLine("=== [ContentFilteredTopicDataSubscriber] Subscription filter : ticker = '{0}'",args[0]);
// create Subscriber
mgr.createSubscriber();
// create DataReader
mgr.createReader("ContentFilteredTopic", true);
// Read Events
IDataReader dreader = mgr.getReader();
StockDataReader WaitSetReader = dreader as StockDataReader;
// Create WaitSet
IWaitSet w = new WaitSet();
// Status Condition
IStatusCondition status;
status = dreader.StatusCondition;
status.SetEnabledStatuses(StatusKind.DataAvailable);
ReturnCode result = ReturnCode.Error;
result = w.AttachCondition(status);
ErrorHandler.checkHandle(status, "DataReader.StatusCondition");
ErrorHandler.checkStatus(result, "WaitSet.AttachCondition");
DDS.ICondition[] conditionList;
DDS.SampleInfo[] infoSeq;
Stock[] stockSeq;
Console.WriteLine("=== [ContentFilteredTopicDataSubscriber] Ready ...");
bool terminate = false;
int count = 0;
while (!terminate && count < 1500)
{
/**
* Wait until data will be available
*/
Duration wait_timeout = new Duration(Duration.InfiniteSec, Duration.InfiniteNanoSec);
conditionList = null;
result = w.Wait(ref conditionList, wait_timeout);
ErrorHandler.checkStatus(result, "WaitSet.Wait");
stockSeq = null;
infoSeq = null;
/**
* Read Data
*/
result = WaitSetReader.Take(ref stockSeq, ref infoSeq, Length.Unlimited, SampleStateKind.Any, ViewStateKind.Any, InstanceStateKind.Any);
ErrorHandler.checkStatus(result, "StockDataReader.Take");
/**
* Display Data
*/
for (int i=0; i < stockSeq.Length; i++)
{
if (infoSeq[i].ValidData)
{
if (stockSeq[i].price == -1)
{
// We read the last expected sample => exit
terminate = true;
break;
}
Console.WriteLine("=== [ContentFilteredTopicDataSubscriber] receives stockQuote : ( {0} , {1} )",
stockSeq[i].ticker, stockSeq[i].price);
}
}
result = WaitSetReader.ReturnLoan(ref stockSeq, ref infoSeq);
ErrorHandler.checkStatus(result, "StockDataReader.ReturnLoan");
Thread.Sleep(200);
++count;
}
Console.WriteLine("=== [ContentFilteredTopicDataSubscriber] Market Closed");
// clean up
mgr.getSubscriber().DeleteDataReader(WaitSetReader);
mgr.deleteSubscriber();
mgr.deleteContentFilteredTopic();
mgr.deleteTopic();
mgr.deleteParticipant();
}
static void Main(string[] args)
{
bool automatic = true;
if (args.Length > 1)
{
automatic = args[0].Equals("true");
}
string hostName;
DDSEntityManager mgr = new DDSEntityManager();
// create domain participant
mgr.createParticipant("BuiltInTopics");
// Resolve the built-in Subscriber
ISubscriber builtInSubscriber = mgr.getParticipant().BuiltInSubscriber;
// Lookup the DataReader for the DCPSParticipant built-in Topic
IDataReader reader = builtInSubscriber.LookupDataReader("DCPSParticipant");
// Cast the DataReader to a ParticipantBuiltInTopicDataReader
ParticipantBuiltinTopicDataDataReader participantReader = reader as ParticipantBuiltinTopicDataDataReader;
ErrorHandler.checkHandle(participantReader, "ParticipantBuiltInTopicDataReader narrow");
// Allocate a new typed seq for data samples
ParticipantBuiltinTopicData[] data = null;
// Allocate a new seq for sample infos
SampleInfo[] info = null;
Console.WriteLine("=== [BuiltInTopicsDataSubscriber] : Waiting for historical data ... ");
participantReader.WaitForHistoricalData(Duration.Infinite);
Console.WriteLine("=== [BuiltInTopicsDataSubscriber] : done");
// Create a new ReadCondition for the reader that matches all samples
IReadCondition readCond = participantReader.CreateReadCondition(SampleStateKind.Any, ViewStateKind.Any, InstanceStateKind.Any);
ErrorHandler.checkHandle(readCond, "DataReader.CreateReadCondition");
// Create a waitset and add the ReadCondition created above
WaitSet aWaitSet = new WaitSet();
ReturnCode status = aWaitSet.AttachCondition(readCond);
ErrorHandler.checkStatus(status, "WaitSet.AttachCondition");
// Initialize and pre-allocate the seq used to obtain the triggered Conditions.
ICondition[] condSeq = new ICondition[0];
// Allocate a map store node information later on
// The key of map is the id of the node and the value is the
// number of active participants on that node. A Dictionary is used
// as an UnorderedMap.
Dictionary<int, int> nodes = new Dictionary<int, int>();
// Allocate a map to store node information later on.
// The key of the map is the id of the node and the value is the
// name of the node. A Dictionary is used as an UnorderedMap.
Dictionary<int, string> nodeNames = new Dictionary<int, string>();
Console.WriteLine("=== [BuiltInTopicsDataSubscriber] Ready ...");
// Block the current thread until the attached condition becomes true
// or the user interrupts.
status = aWaitSet.Wait(ref condSeq, Duration.Infinite);
ErrorHandler.checkStatus(status, "WaitSet.Wait");
bool done = false;
// Continue processing until interrupted.
while (!done)
{
// Take all the available data from the reader
status = participantReader.Take(ref data, ref info, Length.Unlimited,
SampleStateKind.Any, ViewStateKind.Any, InstanceStateKind.Any);
ErrorHandler.checkStatus(status, "ParticipantBuiltinTopicDataDataReader.Take");
// Verify the data has been taken
if (status == ReturnCode.Ok)
{
// Iterate the list of taken samples.
for (int i = 0; i < data.Length ; i++)
{
// Resolve the node identification
int nodeId = data[i].Key[0];
// Initialise the number of participants for a node
int participantCount = 0;
// Check if we saw a participant for the node before.
if (nodes.ContainsKey(nodeId))
{
participantCount = nodes[nodeId];
}
// Check sample info to see whether the instance is ALIVE.
if (info[i].InstanceState == InstanceStateKind.Alive)
{
// The splicedaemon publishes the host-name in the
// user_data field
if (data[i].UserData.Value.Length != 0)
{
hostName = Encoding.UTF8.GetString(data[i].UserData.Value);
nodeNames[nodeId] = hostName;
}
else
{
hostName = null;
}
// Increase the number of participants.
participantCount++;
// Update the number of participants for the node.
nodes[nodeId] = participantCount;
// If it's the first participant, report the node is up.
if (participantCount == 1)
{
Console.WriteLine("=== [BuiltInTopicsDataSubscriber] Node ' {0} ' started (Total nodes running: {1} ) participantCount = {2}",
nodeId, nodes.Count, participantCount);
}
if (hostName != null)
{
Console.WriteLine("=== [BuiltInTopicsDataSubscriber] Hostname for node ' {0} ' is hostname: {1}", nodeId, hostName);
}
}
else
{
// Decrease the number of participants.
participantCount--;
// If no more participants exist, report the node is down.
if (participantCount == 0)
{
hostName = nodeNames[nodeId];
nodeNames.Remove(nodeId);
nodes.Remove(nodeId);
if (hostName != null)
{
Console.WriteLine("=== [BuiltInTopicsDataSubscriber] Node {0} ({1}) stopped (Total nodes running: ({2})",
nodeId, hostName, nodes.Count);
}
else
{
Console.WriteLine("=== [BuiltInTopicsDataSubscriber] Node {0} stopped (Total nodes running : {1})",
nodeId, nodes.Count);
}
}
else if (participantCount > 0)
{
nodes[nodeId] = participantCount;
}
}
}
}
status = participantReader.ReturnLoan(ref data, ref info);
ErrorHandler.checkStatus(status, "ParticipantReader.ReturnLoan");
if (!automatic)
{
// Block the current thread until the attached condition becomes
// true or the user interrupts.
Console.WriteLine("=== [BuiltInTopicsDataSubscriber] Waiting ... ");
status = aWaitSet.Wait(ref condSeq, Duration.Infinite);
done = (status != ReturnCode.Ok);
}
else
{
done = true;
}
}
// Recursively delete all entities in the DomainParticipant.
mgr.getParticipant().DeleteContainedEntities();
// Delete DomainParticipant
mgr.getDomainParticipantFactory().DeleteParticipant(mgr.getParticipant());
}
static void Main(string[] args)
{
DDSEntityManager mgr = new DDSEntityManager("WaitSet");
String partitionName = "WaitSet example";
// create Domain Participant
mgr.createParticipant(partitionName);
// create Type
MsgTypeSupport msgTS = new MsgTypeSupport();
mgr.registerType(msgTS);
// create Topic
mgr.createTopic("WaitSetData_Msg");
// create Subscriber
mgr.createSubscriber();
// create DataReader
mgr.createReader(false);
// Read Events
IDataReader dreader = mgr.getReader();
MsgDataReader WaitSetReader = dreader as MsgDataReader;
// Create a WaitSet
WaitSet w = new WaitSet();
// Create a ReadCondition
IReadCondition readCond = WaitSetReader.CreateReadCondition(SampleStateKind.NotRead, ViewStateKind.New, InstanceStateKind.Alive);
ErrorHandler.checkHandle(readCond, "DataReader.CreateReadCondition");
// Create a QueryCondition
String[] queryStr = { "Hello again" };
Console.WriteLine("=== [WaitSetDataSubscriber] Query : message = \"Hello again");
IQueryCondition queryCond = WaitSetReader.CreateQueryCondition("message=%0", queryStr);
ErrorHandler.checkHandle(queryCond, "DataReader.CreateQueryCondition");
// Obtain a StatusCondition
IStatusCondition statusCond;
statusCond = dreader.StatusCondition;
statusCond.SetEnabledStatuses(StatusKind.LivelinessChanged);
ErrorHandler.checkHandle(statusCond, "DataReader.StatusCondition");
GuardCondition escape;
escape = new GuardCondition();
ReturnCode result;
result = w.AttachCondition(statusCond);
ErrorHandler.checkStatus(result, "WaitSet.AttachCondition (status)");
result = w.AttachCondition(readCond);
ErrorHandler.checkStatus(result, "WaitSet.AttachCondition (read)");
result = w.AttachCondition(queryCond);
ErrorHandler.checkStatus(result, "WaitSet.AttachCondition (query)");
result = w.AttachCondition(escape);
ErrorHandler.checkStatus(result, "WaitSet.AttachCondition (guard)");
/* Initialize and pre-allocate the GuardList used to obtain
the triggered Conditions. */
ICondition[] guardList = new ICondition[4];
DDS.SampleInfo[] infoSeq = null;
Msg[] msgSeq = null;
bool escaped = false;
bool writerLeft = false;
int prevCount = 0;
int count = 0;
Console.WriteLine("=== [WaitSetDataSubscriber] Ready ...");
while (!escaped && count < 20 )
{
/**
* Wait until data will be available
*/
Duration wait_timeout = new Duration(Duration.InfiniteSec, Duration.InfiniteNanoSec);
result = w.Wait(ref guardList, wait_timeout);
ErrorHandler.checkStatus(result, "WaitSet.Wait");
/* Walk over all guards to display information */
foreach (ICondition guard in guardList)
{
if (guard == readCond)
{
result = WaitSetReader.ReadWithCondition(ref msgSeq, ref infoSeq,
Length.Unlimited, readCond);
ErrorHandler.checkStatus(result, "WaitSetReader.ReadWithCondition");
foreach (Msg msg in msgSeq)
{
Console.WriteLine(" --- New message received --- ");
Console.WriteLine(" userID: {0}", msg.userID);
Console.WriteLine(" Message : \"{0}", msg.message);
}
result = WaitSetReader.ReturnLoan(ref msgSeq, ref infoSeq);
ErrorHandler.checkStatus(result, "WaitSet.ReturnLoan");
}
else if (guard == queryCond)
{
result = WaitSetReader.TakeWithCondition(ref msgSeq, ref infoSeq,
Length.Unlimited, queryCond);
ErrorHandler.checkStatus(result, "WaitSetReader.TakeWithCondition");
foreach (Msg msg in msgSeq)
{
Console.WriteLine(" --- New message received with QueryCondition --- ");
Console.WriteLine(" userID: {0}", msg.userID);
Console.WriteLine(" Message : \" {0}", msg.message);
}
result = WaitSetReader.ReturnLoan(ref msgSeq, ref infoSeq);
ErrorHandler.checkStatus(result, "WaitSet.ReturnLoan");
}
else if (guard == statusCond)
{
LivelinessChangedStatus livelinessStatus = new LivelinessChangedStatus();
result = WaitSetReader.GetLivelinessChangedStatus(ref livelinessStatus);
ErrorHandler.checkStatus(result, "DataReader.getLivelinessChangedStatus");
if (livelinessStatus.AliveCount < prevCount)
{
Console.WriteLine("!!! A WaitSetDataWriter lost its liveliness");
writerLeft = true;
Console.WriteLine("Triggering escape condition.");
ReturnCode status = escape.SetTriggerValue(true);
}
else
{
Console.WriteLine("!!! A WaitSetDataWriter joined");
}
prevCount = livelinessStatus.AliveCount;
}
else if (guard == escape)
{
Console.WriteLine("WaitSetSubscriber has terminated.");
escaped = true;
ReturnCode status = escape.SetTriggerValue(false);
}
else
{
// Unknown Condition
}
}
++count;
}
// Detach all Conditions from the WaitSet
result = w.DetachCondition(escape);
ErrorHandler.checkStatus(result, "WaitSet.DetachCondition (escape)");
result = w.DetachCondition(readCond);
ErrorHandler.checkStatus(result, "WaitSet.DetachCondition (readCond)");
result = w.DetachCondition(queryCond);
ErrorHandler.checkStatus(result, "WaitSet.DetachCondition (queryCond)");
result = w.DetachCondition(statusCond);
ErrorHandler.checkStatus(result, "WaitSet.DetachCondition (statusCond)");
Console.WriteLine("=== [Subscriber] Closed");
// clean up
WaitSetReader.DeleteReadCondition(readCond);
WaitSetReader.DeleteReadCondition(queryCond);
mgr.getSubscriber().DeleteDataReader(WaitSetReader);
mgr.deleteSubscriber();
mgr.deleteTopic();
mgr.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");
}