Ok - third time. Let's hope the email content works on "rich text"...
Tried the following with no success:
session.attachMessageListener(this, "myDest");
session.messageSubscribe("q1", "myDest", MessageAcceptMode.EXPLICIT,
MessageAcquireMode.NOT_ACQUIRED, null, 0, null);
Am I missing something like this?
//session.messageSetFlowMode("myDest",MessageFlowMode.WINDOW);
//session.messageFlow("myDest",
MessageCreditUnit.BYTE,ClientSession.MESSAGE_FLOW_MAX_BYTES);
//session.sync();
The following works, but I can't set MessageAcquireMode.NOT_ACQUIRED using
these methods:
session.attachMessageListener(this,"q1");
session.messageSubscribe("q1");
(Both snippets above are followed by: while (true) {
Console.WriteLine("sleeping");Thread.Sleep(1000);} )
From: [email protected]
To: [email protected]
Subject: RE: Last Value Queue LVQ using dotnet API / last value cache
Date: Tue, 27 Oct 2009 01:25:31 +0000
I just had to figure this out myself. MessageAcquireMode.PRE_ACQUIRED is
exactly what you DON'T want, because acquiring a message removes it from the
queue. NOT_ACQUIRED will leave it in the queue.
-----Original Message-----
From: Ignacio Ybarra [mailto:[email protected]]
Sent: Monday, October 26, 2009 5:44 PM
To: [email protected]
Subject: Last Value Queue LVQ using dotnet API / last value cache
Hello,
I have been trying to set up a Last Value Queue using your dotnet API
(client0-10). Most of it works great -- apart from consuming messages without
taking them from the queue (peek).
Basically I want the consumer/listener to receive by not remove the msg from
the lvq, i.e. the setup to work as a last value cache.
Since I couldn't find parameters/methods to set this up using the interface, I
have taken the steps below.
The setup part of my code looks like this:
session.exchangeDeclare("ig.direct", "direct", null, null, new Option[] {
Option.DURABLE });
session.queueDeclare("q1",null,new
Dictionary<string,object>(){{"qpid.last_value_queue",1}}, new Option[] { Option.DURABLE
});
session.exchangeBind("q1", "ig.direct", "routing_key");
The sender/publisher part of the code looks like this (in reality I send a
batch of msgs so they get overwritten):
//List<IMessage> messages = new List<IMessage>() ;
//for (int i = 0; i < Program.NUM_MSGS; i++)
//{
IMessage message = new Message();
message.DeliveryProperties.setRoutingKey("routing_key");
message.DeliveryProperties.setDeliveryMode(MessageDeliveryMode.PERSISTENT);
message.appendData(Encoding.UTF8.GetBytes("Message "));// + i));
message.ApplicationHeaders.Add("qpid.LVQ_key", "INTC");
//messages.Add(message)
//}
session.messageTransfer("ig.direct", message);//s[i]);
The receiver/listener looks like this:
session.attachMessageListener(this, "q1");
session.messageSubscribe("q1");
//public void messageTransfer(IMessage m)
//{
//...
// Console.WriteLine("Message: " + message);
//}
All works with this setup, but the message is removed from the queue.
I have also tried the following in the listener, but in this case the callback
does not get any messages:
session.attachMessageListener(this, "myDest");
session.messageSubscribe("q1", "myDest", MessageAcceptMode.EXPLICIT,
MessageAcquireMode.PRE_ACQUIRED, null, 0, null);
Any clues? Many thanks in advance.- ig
---------------------------------------------------------------------
Apache Qpid - AMQP Messaging Implementation
Project: http://qpid.apache.org
Use/Interact: mailto:[email protected]
---------------------------------------------------------------------
Apache Qpid - AMQP Messaging Implementation
Project: http://qpid.apache.org
Use/Interact: mailto:[email protected]
