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20.3. Configuring HA with Static Failover
Overview
By default, HA with static failover uses a sequential strategy when selecting a replica service if the original service with which a client is communicating becomes unavailable, or fails. The sequential strategy selects a replica service in the same sequential order every time it is used. Selection is determined by Apache CXF’s internal service model and results in a deterministic failover pattern.
Configuring a random strategy
You can configure HA with static failover to use a random strategy instead of the sequential strategy when selecting a replica. The random strategy selects a random replica service each time a service becomes unavailable, or fails. The choice of failover target from the surviving members in a cluster is entirely random.
To configure the random strategy, add the configuration shown in Example 20.3, “Configuring a Random Strategy for Static Failover” to your client configuration file.
Example 20.3. Configuring a Random Strategy for Static Failover
<beans ...> 1 <bean id="Random" class="org.apache.cxf.clustering.RandomStrategy"/> <jaxws:client name="{http://apache.org/hello_world_soap_http}Replica3" createdFromAPI="true"> <jaxws:features> <clustering:failover> 2 <clustering:strategy> <ref bean="Random"/> </clustering:strategy> </clustering:failover> </jaxws:features> </jaxws:client> </beans>
The configuration shown in Example 20.3, “Configuring a Random Strategy for Static Failover” can be explained as follows:
