thanks a lot. I tried both PRE_ACQUIRED & NOT_ACQUIRED. Is there any
performance overhead involved in any of these 2 options?
Also i wanted to know whether ACCEPT_MODE_EXPLICIT/ACCEPT_MODE_NONE has any
performance overhead?
Is there any document available that gives performance overheads of options
that we use?
I was trying to declare a durable queue. I did following:
:
:
session.queueDeclare(arg::queue="myqueue", arg::durable=true);
:
:
steps ::
./qpidd -p 5004 --auth no
./my_queue //declares the queues
./my_producer // sends the messages to the queue
./browse // browses the messages
now i stop the broker i.e. ctrl+c on the cmd prompt where ./qpidd is running
start the broker again i.e. ./qpidd -p 5004 --auth no
./browse //gives error Queue not found
Please let me know if i m going wrong anywhere
Thanks
Gordon Sim wrote:
>
> ft420 wrote:
>> I did following:
>> connection.open(host, port);
>> Session session = connection.newSession();
>> :
>> :
>> :
>> SubscriptionManager sub(session);
>> sub.setAcquireMode(ACQUIRE_MODE_PRE_ACQUIRED);
>>
>> for (uint i = 0; i < queueMsgCnt; i++)
>> {
>> sub.get(message, "myqueue");
>> cout << "Message is " << message.getData() << endl;
>> }
>>
>> But this get() call on SubscriptionManager object removes message from
>> queue
>> instead of just peeking/browsing it from queue.
>
> Yes, I don't think I like the default acquire mode on the subscription
> manager and certainly the get() method ignores it anyway.
>
>> Please let me know where am i going wrong?? how to use
>> ACQUIRE_MODE_PRE_ACQUIRED for peeking/browsing messages??
>
> Option 1: browsing using NOT_ACQUIRED
>
> SubscriptionManager sub(session);
> SubscriptionSettings settings;
> settings.acquireMode = ACQUIRE_MODE_NOT_ACQUIRED;
> LocalQueue incoming;
> sub.subscribe(incoming, "myqueue", settings);
> ....
> for (uint i = 0; i < queueMsgCnt; i++)
> {
> incoming.get(message);
> cout << "Message is " << message.getData() << endl;
> }
>
> Option 2: releasing PRE_ACQUIREd messages:
>
> SubscriptionManager sub(session);
> SubscriptionSettings settings;
> settings.acquireMode = ACQUIRE_MODE_PRE_ACQUIRED;
> settings.autoAck = 0;
> LocalQueue incoming;
> Subscription s = sub.subscribe(incoming, "myqueue", settings);
> ....
> for (uint i = 0; i < queueMsgCnt; i++)
> {
> incoming.get(message);
> cout << "Message is " << message.getData() << endl;
> }
> s.cancel();
> s.release(s.getUnaccepted());//messages are left on the queue
>
> (You can use a MessageListener instead of the LocalQueue if you prefer a
> push style interface to the pull style above).
>
> ---------------------------------------------------------------------
> Apache Qpid - AMQP Messaging Implementation
> Project: http://qpid.apache.org
> Use/Interact: mailto:[email protected]
>
>
>
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