48 lines
2.0 KiB
Markdown
48 lines
2.0 KiB
Markdown
# JMS Clustered Grouping Example
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To run the example, simply type **mvn verify** from this directory, or **mvn -PnoServer verify** if you want to start and create the broker manually.
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This example demonstrates how to ensure strict ordering across a cluster using clustered message grouping
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We create 3 nodes each with a grouping message handler, one with a Local handler and 2 with a Remote handler.
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The local handler acts as an arbitrator for the 2 remote handlers, holding the information on routes and communicating the routing info with the remote handlers on the other 2 nodes
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We then send some messages to each node with the same group id set and ensure the same consumer receives all of them
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Here's the relevant snippet from the broker configuration that has the local handler
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<cluster-connections>
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<cluster-connection name="my-cluster">
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<connector-ref>netty-connector</connector-ref>
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<retry-interval>500</retry-interval>
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<use-duplicate-detection>true</use-duplicate-detection>
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<message-load-balancing>STRICT</message-load-balancing>
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<max-hops>1</max-hops>
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<discovery-group-ref discovery-group-name="my-discovery-group"/>
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</cluster-connection>
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</cluster-connections>
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<grouping-handler name="my-grouping-handler">
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<type>LOCAL</type>
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<address>jms</address>
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<timeout>5000</timeout>
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</grouping-handler>
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Here's the relevant snippet from the broker configuration that has the remote handlers
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<cluster-connections>
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<cluster-connection name="my-cluster">
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<retry-interval>500</retry-interval>
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<use-duplicate-detection>true</use-duplicate-detection>
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<message-load-balancing>STRICT</message-load-balancing>
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<max-hops>1</max-hops>
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<discovery-group-ref discovery-group-name="my-discovery-group"/>
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</cluster-connection>
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</cluster-connections>
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<grouping-handler name="my-grouping-handler">
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<type>REMOTE</type>
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<address>jms</address>
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<timeout>5000</timeout>
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</grouping-handler> |