Make failover protocol optionally asynchronously connect to sockets
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Key: AMQNET-159
URL: https://issues.apache.org/activemq/browse/AMQNET-159
Project: ActiveMQ .Net
Issue Type: New Feature
Components: ActiveMQ Client
Affects Versions: 1.1
Environment: XP, Windows Server 2008, Sql Server 2008
Reporter: Mark Gellings
Assignee: Jim Gomes
Fix For: 1.1
The current failover transport synchronously attempts to socket connect to a
broker. Preferably we would first socket connect trying the master address in
the failover address to avoid a socket connection timeout. When the first tcp
address in the failover address is the slave, its connectors are not started,
and .NET takes around 20 - 25s to timeout trying to socket connect to the
slave. Thus the client is waiting 20-25s to submit a message when the session
is first established.
Since the first tcp address in the failover address is never guaranteed to be
the master, I've coded an enhancement that optionally allows to asynchronously
socket connect utilizing all the tcp addresses in the failover address. I have
a patch you can apply.
The following failover address is an example of how to use the async connect.
private static Uri _uri = new
Uri("failover:(tcp://WAMQDEV1.qg.com:10083,tcp://SXMQDEV1.qg.com:10083)?AsyncConnect=true&AsyncTimeout=20000");
This will cause the failover transport to attempt connecting to WAMQDEV1 and
SXMQDEV1 at the same time to avoid the impact of any socket connect timeouts.
First broker connected to becomes the transport utilized. If WAMQDEV1 broker
is not running or is running the slave broker then if SXMQDEV1 is running the
master broker the client will connect to SXMQDEV1.
AsyncTimeout is the max time in milliseconds to wait for a transport to be
initialized. So if both brokers are down, in the example above, after 20000
milliseconds the normal retry logic will kick in.
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