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https://issues.apache.org/activemq/browse/AMQ-2849?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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John McCarthy updated AMQ-2849:
-------------------------------
Attachment: FanoutTransportFactory_apply_DiscoveryTransport_params.patch
Proposed solution
> Fanout: unable to apply parameters to discovered brokers
> --------------------------------------------------------
>
> Key: AMQ-2849
> URL: https://issues.apache.org/activemq/browse/AMQ-2849
> Project: ActiveMQ
> Issue Type: Improvement
> Components: Transport
> Affects Versions: 5.3.2
> Reporter: John McCarthy
> Attachments:
> FanoutTransportFactory_apply_DiscoveryTransport_params.patch
>
>
> There is currently no way to apply parameters to discovered brokers when
> using the fanout transport. The discovery transport allows this by calling
> {{DiscoveryTransport.setParameters(Map)}} in
> {{DiscoveryTransportFactory.createTransport(CompositeData)}}. For example,
> the following URI would apply a connection timeout of 3 seconds to all
> discovered TCP transport brokers,
> {{discovery:(multicast://default)?connectionTimeout=3000}}
> The corresponding fanout URI would not apply the connection timeout to
> discovered TCP brokers,
> {{fanout:(multicast://default)?connectionTimeout=3000}}
>
> This functionality is requested as discovered brokers may become unreachable.
> In those circumstances, the default 30 connection timeout for the TCP
> transport can cause a considerable delay.
> The attached patch is a proposed solution where both transports that use the
> discovery transport, failover and fanout, have a common code path in
> {{DiscoveryTransportFactory}} for creating a discovery transport. This code
> path sets the parameters consistently for both transports. (Although it
> relies on a new static method in {{DiscoveryTansportFactory}} and
> {{TransportFactory}} objects do not have static methods,
> {{FanoutTransportFactory}} was already making a static call to
> {{DiscoveryAgentFactory}}). The patch also has two new test cases, one for
> apply parameters and another for a minor fix where {{DiscoveryTransport}}
> should cache the added URI after the parameters are applied so that the same
> URI is removed in {{onServiceRemove()}}.
> This issue is created after discussion on the ActiveMQ Users discussion board,
> [http://old.nabble.com/Applying-Parameters-to-Discovered-Brokers-td29239157.html]
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