So there is no difference between get() and fetch() if the capacity is
specified and it is greater than zero?
I'm able to get messages without any calls to fetch(), i.e.
string addr("test-queue/test-subject;{create:always,node:{type:queue}}");
Connection connection("amqp:tcp:localhost:5672", "{username: guest, password:
guest}");
connection.open();
Session session = connection.createSession("sessionId");
Sender sender = session.createSender(addr);
sender.send(Message("Hello World!"), true);
session.sync(true);
Receiver receiver = session.createReceiver(addr);
receiver.setCapacity(1);
Message message;
Duration duration(1000);
if(receiver.get(message, duration)) {
cout << "Get: " << message.getContent() << endl;
session.acknowledge(true);
}
Best Regards,
Sergey
-----Original Message-----
From: Gordon Sim [mailto:[email protected]]
Sent: Tuesday, July 31, 2012 1:18 PM
To: [email protected]
Subject: Re: What's the difference between Receiver::get and Receiver::fetch
On 07/31/2012 09:32 AM, Zhemzhitsky Sergey wrote:
> I have recently found that Receiver::get does not return anything if the
> receiver's capacity is not specified (i.e. zero) and if the receiver's
> capacity is greater than 0, then Receiver::get retrieves messages from the
> broker.
> At the same time Receiver::fetch always retrieves messages from the broker
> even if the receiver's capacity is not specified.
>
> Is this an expected behavior?
If the capacity is zero there is no prefetch, and get() currently simply
returns any prefetched messages (if they exist). On th eother hand, every
fetch() call will pull off a message if there is no prefetch buffer to take one
from.
Does that make sense?
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