8.2.4.4. Configure the Replicated Data Grid

Red Hat JBoss Data Grid's replicated mode ensures that every entry is replicated on every node in the data grid.

This mode offers security against data loss due to node failures and excellent data availability. These benefits are at the cost of limiting the storage capacity to the amount of storage available on the node with the least memory.

Programmatic Configuration:

Use the following code snippet to programmatically configure the cache for replication mode (either synchronous or asynchronous):

private static EmbeddedCacheManager createCacheManagerProgramatically() {
   return new DefaultCacheManager(
      new GlobalConfigurationBuilder()
         .transport().addProperty("configurationFile", "jgroups.xml")
         .build(),
      new ConfigurationBuilder()
         .clustering().cacheMode(CacheMode.REPL_SYNC)
         .build()
   );
}

private static EmbeddedCacheManager createCacheManagerProgramatically() {
   return new DefaultCacheManager(
      new GlobalConfigurationBuilder()
         .transport().addProperty("configurationFile", "jgroups.xml")
         .build(),
      new ConfigurationBuilder()
         .clustering().cacheMode(CacheMode.REPL_SYNC)
         .build()
   );
}

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Declarative Configuration:

Edit the infinispan-replication.xml file to include the following XML code to declaratively configure the cache for replication mode (either synchronous or asynchronous):

<infinispan xsi:schemaLocation="urn:infinispan:config:5.1 http://www.infinispan.org/schemas/infinispan-config-5.1.xsd" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="urn:infinispan:config:5.1">
   <global>
      <transport>
         <properties>
            <property name="configurationFile" value="jgroups.xml"/>
         </properties>
      </transport>
   </global>
   <default>
      <clustering mode="replication">
         <sync/>
      </clustering>
   </default>
</infinispan>

<infinispan xsi:schemaLocation="urn:infinispan:config:5.1 http://www.infinispan.org/schemas/infinispan-config-5.1.xsd" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="urn:infinispan:config:5.1">
   <global>
      <transport>
         <properties>
            <property name="configurationFile" value="jgroups.xml"/>
         </properties>
      </transport>
   </global>
   <default>
      <clustering mode="replication">
         <sync/>
      </clustering>
   </default>
</infinispan>

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Use the following code to initialize and return a DefaultCacheManager with the XML configuration file:

private static EmbeddedCacheManager createCacheManagerFromXml() throws IOException {
   return new DefaultCacheManager("infinispan-replication.xml");}

private static EmbeddedCacheManager createCacheManagerFromXml() throws IOException {
   return new DefaultCacheManager("infinispan-replication.xml");}

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Note

JBoss EAP includes its own underlying JMX. This can cause a collision when using the sample code with JBoss EAP and display an error such as org.infinispan.jmx.JmxDomainConflictException: Domain already registered org.infinispan.

To avoid this, configure global configuration as follows:

GlobalConfiguration glob = new GlobalConfigurationBuilder()
	.clusteredDefault()
        .globalJmxStatistics()
          .allowDuplicateDomains(true)
          .enable()
        .build();

GlobalConfiguration glob = new GlobalConfigurationBuilder()
	.clusteredDefault()
        .globalJmxStatistics()
          .allowDuplicateDomains(true)
          .enable()
        .build();

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8.2.4.4. Configure the Replicated Data Grid

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