26 lines
1.5 KiB
Markdown
26 lines
1.5 KiB
Markdown
# JMS Load Balanced Clustered Queue Example
|
|
|
|
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.
|
|
|
|
This example demonstrates a JMS queue deployed on two different nodes. The two nodes are configured to form a cluster.
|
|
|
|
We then create a consumer on the queue on each node, and we create a producer on only one of the nodes.
|
|
|
|
We then send some messages via the producer, and we verify that **both** consumers receive the sent messages in a round-robin fashion.
|
|
|
|
In other words, ActiveMQ Artemis **load balances** the sent messages across all consumers on the cluster
|
|
|
|
This example uses JNDI to lookup the JMS Queue and ConnectionFactory objects. If you prefer not to use JNDI, these could be instantiated directly.
|
|
|
|
Here's the relevant snippet from the broker configuration, which tells the broker to form a cluster between the two nodes and to load balance the messages between the nodes.
|
|
|
|
<cluster-connection name="my-cluster">
|
|
<connector-ref>netty-connector</connector-ref>
|
|
<retry-interval>500</retry-interval>
|
|
<use-duplicate-detection>true</use-duplicate-detection>
|
|
<message-load-balancing>STRICT</message-load-balancing>
|
|
<max-hops>1</max-hops>
|
|
<discovery-group-ref discovery-group-name="my-discovery-group"/>
|
|
</cluster-connection>
|
|
|
|
For more information on ActiveMQ Artemis load balancing, and clustering in general, please see the clustering section of the user manual. |