DDS::Streams::StreamDataWriter_impl::StreamDataWriter_impl(
DDS::Publisher_ptr publisher_in,
DDS::DomainId_t domainId,
DDS::Streams::StreamDataWriterQos &qos_in,
DDS::TypeSupport_ptr typeSupport,
const char *streamName)
{
DDS::DomainParticipant_var myParticipant;
DDS::Publisher_var myPublisher;
DDS::String_var typeName;
DDS::ReturnCode_t result;
assert(typeSupport);
assert(streamName);
assert(domainId);
if(!publisher_in) {
os_mutexLock(&classLock.lfMutex);
if (this->nrParticipantUsers == 0) {
myParticipant = DDS::DomainParticipantFactory::get_instance()->create_participant(domainId, PARTICIPANT_QOS_DEFAULT, NULL, 0);
if (myParticipant) {
this->participant = myParticipant;
nrParticipantUsers = 1;
} else {
OS_REPORT(OS_ERROR, "DDS::Streams::StreamDataWriter_impl", 0, "Failed to create internal participant");
os_mutexUnlock(&classLock.lfMutex);
throw StreamsException("Failed to create internal participant. Is the domain running?", DDS::RETCODE_PRECONDITION_NOT_MET);
}
} else {
myParticipant = this->participant;
nrParticipantUsers++;
}
myPublisher = myParticipant->create_publisher(DDS::Streams::default_publisher_qos, NULL, 0);
if (myPublisher) {
publisher = myPublisher;
} else {
OS_REPORT(OS_ERROR, "DDS::Streams::StreamDataWriter_impl", 0, "Failed to create internal publisher");
os_mutexUnlock(&classLock.lfMutex);
throw StreamsException("Failed to create internal publisher", DDS::RETCODE_PRECONDITION_NOT_MET);
}
os_mutexUnlock(&classLock.lfMutex);
} else {
publisher = NULL;
myParticipant = publisher_in->get_participant();
if (myParticipant == NULL) {
OS_REPORT(OS_ERROR, "DDS::Streams::StreamDataWriter_impl", 0, "Failed to get participant");
throw StreamsException("Failed to get participant. Is the domain running?", DDS::RETCODE_PRECONDITION_NOT_MET);
}
}
typeName = typeSupport->get_type_name();
result = typeSupport->register_type(myParticipant, typeName);
/* TypeSupport is released here because caller is the parent constructor which cannot release it in the member init list */
release(typeSupport);
if (result != DDS::RETCODE_OK) {
OS_REPORT(OS_ERROR, "DDS::Streams::StreamDataWriter_impl", 0, "Failed to register streams topic for type %s", typeName.in());
throw StreamsException("Failed to register streams topic", result);
}
topic = myParticipant->create_topic(streamName, typeName, DDS::Streams::default_topic_qos, NULL, 0);
if (!topic.in()) {
OS_REPORT(OS_ERROR, "DDS::Streams::StreamDataWriter_impl", 0, "Failed to create topic %s", streamName);
throw StreamsException("Failed to create streams topic", result);
}
/* Check if QoS is valid */
if ((qos_in.flush.max_delay.sec < 0) ||
((qos_in.flush.max_delay.sec == 0) &&
(qos_in.flush.max_delay.nanosec == 0))) {
throw StreamsException("Invalid QoS: auto-flush delay is not a valid duration", DDS::RETCODE_BAD_PARAMETER);
} else if ((qos_in.flush.max_samples <= 0) ||
(qos_in.flush.max_samples == DDS::LENGTH_UNLIMITED)) {
throw StreamsException("Invalid QoS: auto-flush sample limit must be a positive number and cannot be DDS::LENGTH_UNLIMITED", DDS::RETCODE_BAD_PARAMETER);
} else {
qos = qos_in;
}
}
int OSPL_MAIN (int argc, char *argv[])
{
// usage : ContentFilteredTopicDataSubscriber <subscription_string>
const char *ContentFilteredTopicDataToSubscribe;
os_time delay_200ms = { 0, 200000000 };
char buf[MAX_MSG_LEN];
if (argc > 1)
{
ContentFilteredTopicDataToSubscribe = argv[1];
}
else
{
cerr <<
"*** [ContentFilteredTopicDataSubscriber] Subscription string not specified" <<
endl;
cerr << "*** usage : ContentFilteredTopicDataSubscriber <subscription_string>" <<
endl;
return - 1;
}
StockSeq msgList;
SampleInfoSeq infoSeq;
DDSEntityManager mgr;
// create domain participant
char partition_name[] = "ContentFilteredTopic example";
mgr.createParticipant(partition_name);
//create type
StockTypeSupport_var st = new StockTypeSupport();
mgr.registerType(st.in());
//create Topic
char topic_name[] = "StockTrackerExclusive";
mgr.createTopic(topic_name);
//create Subscriber
mgr.createSubscriber();
char sTopicName[] = "MyStockTopic";
// create subscription filter
snprintf(buf, MAX_MSG_LEN, "ticker = '%s'", ContentFilteredTopicDataToSubscribe);
DDS::String_var sFilter = DDS::string_dup(buf);
// Filter expr
StringSeq sSeqExpr;
sSeqExpr.length(0);
// create topic
mgr.createContentFilteredTopic(sTopicName, sFilter.in(), sSeqExpr);
// create Filtered DataReader
cout << "=== [ContentFilteredTopicDataSubscriber] Subscription filter : " << sFilter
<< endl;
mgr.createReader(true);
DataReader_var dreader = mgr.getReader();
StockDataReader_var ContentFilteredTopicDataReader = StockDataReader::_narrow(dreader.in());
checkHandle(ContentFilteredTopicDataReader.in(), "StockDataReader::_narrow");
cout << "=== [ContentFilteredTopicDataSubscriber] Ready ..." << endl;
bool closed = false;
ReturnCode_t status = - 1;
int count = 0;
while (!closed && count < 1500) // We dont want the example to run indefinitely
{
status = ContentFilteredTopicDataReader->take(msgList, infoSeq, LENGTH_UNLIMITED,
ANY_SAMPLE_STATE, ANY_VIEW_STATE, ANY_INSTANCE_STATE);
checkStatus(status, "ContentFilteredTopicDataDataReader::take");
for (DDS::ULong i = 0; i < msgList.length(); i++)
{
if(infoSeq[i].valid_data)
{
if (msgList[i].price == - 1.0f)
{
closed = true;
break;
}
}
cout << "=== [ContentFilteredTopicDataSubscriber] receives stockQuote : ("<< msgList[i].ticker << ", " << msgList[i].price << ')'<< endl;
}
status = ContentFilteredTopicDataReader->return_loan(msgList, infoSeq);
checkStatus(status, "StockDataReader::return_loan");
os_nanoSleep(delay_200ms);
++count;
}
cout << "=== [ContentFilteredTopicDataSubscriber] Market Closed" << endl;
//cleanup
mgr.deleteReader(ContentFilteredTopicDataReader.in ());
mgr.deleteSubscriber();
mgr.deleteFilteredTopic();
mgr.deleteTopic();
mgr.deleteParticipant();
return 0;
}
