void recreate_data_writer_and_topic(DataWriter_var& dw, const DataReader_var& dr)
{
DataWriterQos dw_qos;
dw->get_qos(dw_qos);
Topic_var topic = dw->get_topic();
TopicQos topic_qos;
topic->get_qos(topic_qos);
CORBA::String_var topic_name = topic->get_name(),
type_name = topic->get_type_name();
Publisher_var pub = dw->get_publisher();
DomainParticipant_var dp = pub->get_participant();
pub->delete_datawriter(dw);
dw = 0;
dp->delete_topic(topic);
topic = 0;
// Wait until the data reader is not associated with the writer.
wait_match (dr, 0);
topic = dp->create_topic(topic_name, type_name, topic_qos, 0, 0);
if (!topic) {
ACE_DEBUG((LM_ERROR, "ERROR: %P failed to re-create topic\n"));
return;
}
dw = pub->create_datawriter(topic, dw_qos, 0, 0);
if (!dw) {
ACE_DEBUG((LM_ERROR, "ERROR: %P failed to re-create data writer\n"));
}
}
int
OSPL_MAIN (
int argc,
char *argv[])
{
/* Generic DDS entities */
DomainParticipantFactory_var dpf;
DomainParticipant_var participant;
Topic_var chatMessageTopic;
Publisher_var chatPublisher;
DataWriter_ptr parentWriter;
/* QosPolicy holders */
TopicQos reliable_topic_qos;
PublisherQos pub_qos;
DataWriterQos dw_qos;
/* DDS Identifiers */
DomainId_t domain = 0;
InstanceHandle_t userHandle;
ReturnCode_t status;
/* Type-specific DDS entities */
ChatMessageTypeSupport_var chatMessageTS;
ChatMessageDataWriter_var talker;
/* Sample definitions */
ChatMessage *msg; /* Example on Heap */
/* Others */
int ownID = 1;
int i;
const char *partitionName = "ChatRoom1";
char *chatMessageTypeName = NULL;
char buf[MAX_MSG_LEN];
#ifdef INTEGRITY
#ifdef CHATTER_QUIT
ownID = -1;
#else
ownID = 1;
#endif
#else
/* Options: Chatter [ownID] */
if (argc > 1) {
ownID = atoi(argv[1]);
}
#endif
/* Create a DomainParticipantFactory and a DomainParticipant (using Default QoS settings. */
dpf = DomainParticipantFactory::get_instance ();
checkHandle(dpf.in(), "DDS::DomainParticipantFactory::get_instance");
participant = dpf->create_participant(domain, PARTICIPANT_QOS_DEFAULT, NULL, STATUS_MASK_NONE);
checkHandle(participant.in(), "DDS::DomainParticipantFactory::create_participant");
/* Register the required datatype for ChatMessage. */
chatMessageTS = new ChatMessageTypeSupport();
checkHandle(chatMessageTS.in(), "new ChatMessageTypeSupport");
chatMessageTypeName = chatMessageTS->get_type_name();
status = chatMessageTS->register_type(
participant.in(),
chatMessageTypeName);
checkStatus(status, "NetworkPartitionsData::ChatMessageTypeSupport::register_type");
/* Set the ReliabilityQosPolicy to RELIABLE. */
status = participant->get_default_topic_qos(reliable_topic_qos);
checkStatus(status, "DDS::DomainParticipant::get_default_topic_qos");
reliable_topic_qos.reliability.kind = RELIABLE_RELIABILITY_QOS;
/* Make the tailored QoS the new default. */
status = participant->set_default_topic_qos(reliable_topic_qos);
checkStatus(status, "DDS::DomainParticipant::set_default_topic_qos");
/* Use the changed policy when defining the ChatMessage topic */
chatMessageTopic = participant->create_topic(
"Chat_ChatMessage",
chatMessageTypeName,
reliable_topic_qos,
NULL,
STATUS_MASK_NONE);
checkHandle(chatMessageTopic.in(), "DDS::DomainParticipant::create_topic (ChatMessage)");
/* Adapt the default PublisherQos to write into the "ChatRoom1" Partition. */
status = participant->get_default_publisher_qos (pub_qos);
checkStatus(status, "DDS::DomainParticipant::get_default_publisher_qos");
pub_qos.partition.name.length(1);
pub_qos.partition.name[0] = partitionName;
/* Create a Publisher for the chatter application. */
chatPublisher = participant->create_publisher(pub_qos, NULL, STATUS_MASK_NONE);
checkHandle(chatPublisher.in(), "DDS::DomainParticipant::create_publisher");
/* Create a DataWriter for the ChatMessage Topic (using the appropriate QoS). */
parentWriter = chatPublisher->create_datawriter(
chatMessageTopic.in(),
DATAWRITER_QOS_USE_TOPIC_QOS,
NULL,
STATUS_MASK_NONE);
checkHandle(parentWriter, "DDS::Publisher::create_datawriter (chatMessage)");
/* Narrow the abstract parent into its typed representative. */
talker = ChatMessageDataWriter::_narrow(parentWriter);
checkHandle(talker.in(), "NetworkPartitionsData::ChatMessageDataWriter::_narrow");
/* Initialize the chat messages on Heap. */
msg = new ChatMessage();
checkHandle(msg, "new ChatMessage");
msg->userID = ownID;
msg->index = 0;
if (ownID == TERMINATION_MESSAGE) {
snprintf(buf, MAX_MSG_LEN, "Termination message.");
} else {
snprintf(buf, MAX_MSG_LEN, "Hi there, I will send you %d more messages.", NUM_MSG);
}
msg->content = string_dup(buf);
cout << "Writing message: \"" << msg->content << "\"" << endl;
/* Register a chat message for this user (pre-allocating resources for it!!) */
userHandle = talker->register_instance(*msg);
/* Write a message using the pre-generated instance handle. */
status = talker->write(*msg, userHandle);
checkStatus(status, "NetworkPartitionsData::ChatMessageDataWriter::write");
sleep (1); /* do not run so fast! */
/* Write any number of messages, re-using the existing string-buffer: no leak!!. */
for (i = 1; i <= NUM_MSG && ownID != TERMINATION_MESSAGE; i++) {
msg->index = i;
snprintf(buf, MAX_MSG_LEN, "Message no. %d", i);
msg->content = string_dup(buf);
cout << "Writing message: \"" << msg->content << "\"" << endl;
status = talker->write(*msg, userHandle);
checkStatus(status, "NetworkPartitionsData::ChatMessageDataWriter::write");
sleep (1); /* do not run so fast! */
}
/* Leave the room by disposing and unregistering the message instance. */
status = talker->dispose(*msg, userHandle);
checkStatus(status, "NetworkPartitionsData::ChatMessageDataWriter::dispose");
status = talker->unregister_instance(*msg, userHandle);
checkStatus(status, "NetworkPartitionsData::ChatMessageDataWriter::unregister_instance");
/* Release the data-samples. */
delete msg; // msg allocated on heap: explicit de-allocation required!!
/* Remove the DataWriters */
status = chatPublisher->delete_datawriter( talker.in() );
checkStatus(status, "DDS::Publisher::delete_datawriter (talker)");
/* Remove the Publisher. */
status = participant->delete_publisher( chatPublisher.in() );
checkStatus(status, "DDS::DomainParticipant::delete_publisher");
status = participant->delete_topic( chatMessageTopic.in() );
checkStatus(status, "DDS::DomainParticipant::delete_topic (chatMessageTopic)");
/* Remove the type-names. */
string_free(chatMessageTypeName);
/* Remove the DomainParticipant. */
status = dpf->delete_participant( participant.in() );
checkStatus(status, "DDS::DomainParticipantFactory::delete_participant");
cout << "Completed Chatter example" << endl;
return 0;
}