Chapter 10. Using Data Grid in Red Hat JBoss EAP applications

Procedure

1. Import the Data Grid dependency management to control the versions of runtime Maven dependencies.

   <dependency>
     <groupId>org.infinispan</groupId>
     <artifactId>infinispan-bom</artifactId>
     <version>${version.infinispan.bom}</version>
     <type>pom</type>
     <scope>import</scope>
   </dependency>

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   You must define the value for ${version.infinispan.bom}`in the `<properties> section of the pom.xml file.

2. Declare the required Data Grid dependencies as provided.

   pom.xml

   <dependencies>
     <dependency>
       <groupId>org.infinispan</groupId>
       <artifactId>infinispan-core</artifactId>
       <scope>provided</scope>
     </dependency>
   </dependencies>

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Procedure

1. Connect to the Red Hat JBoss EAP management CLI.

   $ jboss-cli.sh --connect

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2. Create a cache container.

   /subsystem=infinispan/cache-container=exampleCacheContainer:add(statistics-enabled=true)

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   This creates a cache container called exampleCacheContainer with statistics enabled.

3. Add a cache to the cache container.

   /subsystem=infinispan/cache-container=exampleCacheContainer/local-cache=exampleCache:add(statistics-enabled=true)

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   This creates a local cache named exampleCache in the exampleCacheContainer cache container with statistics enabled.

Procedure

1. You can lookup Data Grid caches in your applications like this:

   @Resource(lookup = "java:jboss/infinispan/cache/exampleCacheContainer/exampleCache")
   private Cache<String, String> ispnCache;

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   This defines a Cache called ispnCache.

2. You can put, get and remove entries from the cache as follows:

   Get value of a key

   String value = ispnCache.get(key);

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   This retrieves the value of the key in the cache. If the key is not found, null is returned.

   Put value in a key

   String oldValue = ispnCache.put(key,value);

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   This defines a new key if it does not already exist and associates the value passed. If the key already exists, the original value is replaced.

   Remove a key

   String value = ispnCache.remove(key);

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   This removes the key from the cache.