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Red Hat Bugzilla – Attachment 712879 Details for
Bug 923397
Unacquired delivery record can result in inconsistency for new members
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part of reproducer
example2.cpp (text/x-c++src), 2.52 KB, created by
Gordon Sim
on 2013-03-19 18:18:01 UTC
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Description:
part of reproducer
Filename:
MIME Type:
Creator:
Gordon Sim
Created:
2013-03-19 18:18:01 UTC
Size:
2.52 KB
patch
obsolete
>#include <qpid/client/Connection.h> >#include <qpid/client/Session.h> >#include <qpid/client/Message.h> >#include <qpid/client/MessageListener.h> >#include <qpid/client/SubscriptionManager.h> > >#include <cstdlib> >#include <iostream> > >using namespace qpid::client; > >struct Listener : MessageListener >{ > void received(Message&); > bool process(Message&); > Subscription subscription; >}; > >bool Listener::process(Message& message) >{ > std::cout << "Process message '" << message.getData() > << "'? Enter Y or N" << std::endl; > std::string response; > while (std::cin >> response) { > if (response == "Y" || response == "y") { > return true; > } else if (response == "N" || response == "n") { > return false; > } > std::cout << "Please enter 'Y' or 'N'" << std::endl; > } > subscription.cancel(); > return false; >} > >void Listener::received(Message& message) >{ > //In this example messages are delivered unacquired and we only > //try to acquire if we can process it. > if (process(message)) { > //Now try to acquire message. If the acquisition is successful > //the message id will be moved from the unacquired set into > //the unaccepted set. > subscription.acquire(message); > if (subscription.getUnaccepted().contains(message.getId())) { > subscription.accept(message); > } else { > std::cout << "Message no longer available for acquisition: " << message.getData() << std::endl; > } > } >} > >int main(int argc, char** argv) >{ > const char* host = argc>1 ? argv[1] : "127.0.0.1"; > int port = argc>2 ? atoi(argv[2]) : 5672; > > Connection connection; > try { > connection.open(host, port); > Session session = connection.newSession(); > SubscriptionManager subMgr(session); > > SubscriptionSettings settings(FlowControl::messageWindow(1)); > //Turn off the automatic 'acknowledgement' of received > //messages: > settings.autoAck = 0; > > //Set the acquire mode to 'not-acquired'; this means received > //message are not acquired; i.e. they remain available for > //other subscribers: > settings.acquireMode = ACQUIRE_MODE_NOT_ACQUIRED; > > Listener listener; > session.queueDeclare(arg::queue="message-queue"); > listener.subscription = subMgr.subscribe(listener, "message-queue", settings); > subMgr.run(); > > session.close(); > } catch(const std::exception& error) { > std::cout << error.what() << std::endl; > } >}
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bug 923397
: 712879