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List:       activemq-dev
Subject:    [jira] Commented: (AMQNET-254) Implement a 'failover' transport for
From:       "Timothy Bish (JIRA)" <jira+amqnet () apache ! org>
Date:       2010-05-26 19:39:53
Message-ID: 16564423.3831274902793358.JavaMail.jira () thor
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    [ https://issues.apache.org/activemq/browse/AMQNET-254?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=59550#action_59550 \
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Timothy Bish commented on AMQNET-254:
-------------------------------------

Failover for a Stomp client is a bit tricky since the Stomp protocol doesn't have the \
concept of fault tolerance built in, there's not a simple means of restoring the \
active sessions / subscriptions / transactions that were in place when the connection \
died.  To make things more interesting there's also no heartbeat mechanism to test if \
a connection is alive or not so you are left with using some timeout to determine if \
the connection is dead which can lead to needless failover for clients that are \
simply inactive.   

It could be done although on a more simplistic form that what's in the ActiveMQ \
client, the failover would need to purge any pending messages and transaction state \
info for the client and resubscribe for all the active consumers.  

You could take a look at the FailoverTransport and Inactivity monitor classes in \
NMS.ActiveMQ and contribute a scaled down version of these to the project, we love \
contributions.


> Implement a 'failover' transport for STOMP-provider (similar to the \
>                 ActiveMq-provider)
> --------------------------------------------------------------------------------------
>  
> Key: AMQNET-254
> URL: https://issues.apache.org/activemq/browse/AMQNET-254
> Project: ActiveMQ .Net
> Issue Type: Wish
> Components: NMS
> Reporter: Andreas Ländle
> Assignee: Jim Gomes
> Priority: Minor
> 
> The NMS implementation for the OpenWire protocol directly supports 'failover' - it \
> would be a nice feature if the STOMP provider also supports 'failover'. As always - \
> please let me know if i was unclear or if i should provide better/more information. \
> Also excuse my bad English.

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