public void OnDataAvailable(IDataReader the_reader)
{
previous = -1;
/* Take all messages. */
ReturnCode status = chatMessageDR.Take(
ref messages,
ref infoSeq1,
SampleStateKind.Any,
ViewStateKind.Any,
InstanceStateKind.Any);
ErrorHandler.checkStatus(
status, "Chat.ChatMessageDataReader.take");
/* For each message, extract the key-field and find
* the corresponding name. */
for (int i = 0; i < messages.Length; i++)
{
if (infoSeq1[i].ValidData)
{
/* Find the corresponding named message. */
if (messages[i].userID != previous)
{
previous = messages[i].userID;
nameFinderParams[0] = previous.ToString();
status = nameFinder.SetQueryParameters(nameFinderParams);
ErrorHandler.checkStatus(
status, "DDS.QueryCondition.SetQueryParameters");
status = nameServiceDR.ReadWithCondition(
ref names,
ref infoSeq2,
nameFinder);
ErrorHandler.checkStatus(
status, "Chat.NameServiceDataReader.ReadWithCondition");
/* Extract Name (there should only be one result). */
if (status == ReturnCode.NoData)
{
userName = "******" + previous;
}
else
{
userName = names[0].name;
}
/* Release the name sample again. */
status = nameServiceDR.ReturnLoan(ref names, ref infoSeq2);
ErrorHandler.checkStatus(
status, "Chat.NameServiceDataReader.return_loan");
}
/* Write merged Topic with userName instead of userID. */
joinedSample.userName = userName;
joinedSample.userID = messages[i].userID;
joinedSample.index = messages[i].index;
joinedSample.content = messages[i].content;
status = namedMessageDW.Write(joinedSample);
ErrorHandler.checkStatus(
status, "Chat.NamedMessageDataWriter.write");
}
}
status = chatMessageDR.ReturnLoan(ref messages, ref infoSeq1);
ErrorHandler.checkStatus(
status, "Chat.ChatMessageDataReader.return_loan");
}
public void OnDataAvailable(IDataReader the_reader)
{
int count = 0;
previous = -1;
/* Take all messages. */
ReturnCode status = chatMessageDR.Take(
ref messages,
ref infoSeq1,
SampleStateKind.Any,
ViewStateKind.Any,
InstanceStateKind.Any);
ErrorHandler.checkStatus(
status, "Chat.ChatMessageDataReader.take");
/* For each message, extract the key-field and find
* the corresponding name. */
for (int i = 0; i < messages.Length; i++)
{
if (infoSeq1[i].ValidData)
{
/* Find the corresponding named message. */
if (messages[i].userID != previous)
{
previous = messages[i].userID;
nameFinderParams[0] = previous.ToString();
status = nameFinder.SetQueryParameters(nameFinderParams);
ErrorHandler.checkStatus(
status, "DDS.QueryCondition.SetQueryParameters");
/* To ensure the identifier for the sender is presented with the message
* content, it may be necessary to try reading again if the NameService
* sample is not initially available. This is because the arrival order
* of samples representing different topics cannot be guaranteeed.
*/
status = ReturnCode.NoData;
while (status == ReturnCode.NoData && count < 10)
{
status = nameServiceDR.ReadWithCondition(
ref names,
ref infoSeq2,
nameFinder);
ErrorHandler.checkStatus(
status, "Chat.NameServiceDataReader.ReadWithCondition");
/* Extract Name (there should only be one result). */
if (status == ReturnCode.NoData)
{
userName = "******" + previous;
/* Sleep for some amount of time, as not to consume too much CPU cycles. */
System.Threading.Thread.Sleep(100);
count++;
}
else
{
userName = names[0].name;
/* Release the name sample again. */
status = nameServiceDR.ReturnLoan(ref names, ref infoSeq2);
ErrorHandler.checkStatus(
status, "Chat.NameServiceDataReader.return_loan");
}
}
}
/* Write merged Topic with userName instead of userID. */
joinedSample.userName = userName;
joinedSample.userID = messages[i].userID;
joinedSample.index = messages[i].index;
joinedSample.content = messages[i].content;
status = namedMessageDW.Write(joinedSample);
ErrorHandler.checkStatus(
status, "Chat.NamedMessageDataWriter.write");
}
}
status = chatMessageDR.ReturnLoan(ref messages, ref infoSeq1);
ErrorHandler.checkStatus(
status, "Chat.ChatMessageDataReader.return_loan");
}