public void OnDataAvailable(IDataReader entityInterface)
{
Msg[] msgList = null;
SampleInfo[] infoSeq = null;
status = msgDR.Read(ref msgList, ref infoSeq, Length.Unlimited, SampleStateKind.Any, ViewStateKind.New, InstanceStateKind.Any);
ErrorHandler.checkStatus(status, "DataReader.Read");
if (msgList != null && msgList.Length > 0)
{
Console.WriteLine("=== [ListenerDataListener::OnDataAvailable] - msgList.Length : {0}", msgList.Length);
foreach (Msg msg in msgList)
{
Console.WriteLine(" --- Message Received ---");
Console.WriteLine(" userId : {0}", msg.userID);
Console.WriteLine(" message : \\ {0}", msg.message);
}
status = msgDR.ReturnLoan(ref msgList, ref infoSeq);
ErrorHandler.checkStatus(status, "DataReader.ReturnLoan");
}
guardCond.SetTriggerValue(true);
}
private void doWait()
{
Thread.Sleep(60000);
escape.SetTriggerValue(true);
}
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();
}