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8.5. Clustering JCache instances
JBoss Data Grid implementation goes beyond the specification in order to provide the possibility to cluster caches using the standard API. Given a configuration file to replicate caches such as:
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It is possible to create a cluster of caches using this code:
import javax.cache.*;
import java.net.URI;
// For multiple cache managers to be constructed with the standard JCache API
// and live in the same JVM, either their names, or their classloaders, must
// be different.
// This example shows how to force their classloaders to be different.
// An alternative method would have been to duplicate the XML file and give
// it a different name, but this results in unnecessary file duplication.
ClassLoader tccl = Thread.currentThread().getContextClassLoader();
CacheManager cacheManager1 = Caching.getCachingProvider().getCacheManager(
URI.create("infinispan-jcache-cluster.xml"), new TestClassLoader(tccl));
CacheManager cacheManager2 = Caching.getCachingProvider().getCacheManager(
URI.create("infinispan-jcache-cluster.xml"), new TestClassLoader(tccl));
Cache<String, String> cache1 = cacheManager1.getCache("namedCache");
Cache<String, String> cache2 = cacheManager2.getCache("namedCache");
cache1.put("hello", "world");
String value = cache2.get("hello"); // Returns "world" if clustering is working
// --
public static class TestClassLoader extends ClassLoader {
public TestClassLoader(ClassLoader parent) {
super(parent);
}
}
import javax.cache.*;
import java.net.URI;
// For multiple cache managers to be constructed with the standard JCache API
// and live in the same JVM, either their names, or their classloaders, must
// be different.
// This example shows how to force their classloaders to be different.
// An alternative method would have been to duplicate the XML file and give
// it a different name, but this results in unnecessary file duplication.
ClassLoader tccl = Thread.currentThread().getContextClassLoader();
CacheManager cacheManager1 = Caching.getCachingProvider().getCacheManager(
URI.create("infinispan-jcache-cluster.xml"), new TestClassLoader(tccl));
CacheManager cacheManager2 = Caching.getCachingProvider().getCacheManager(
URI.create("infinispan-jcache-cluster.xml"), new TestClassLoader(tccl));
Cache<String, String> cache1 = cacheManager1.getCache("namedCache");
Cache<String, String> cache2 = cacheManager2.getCache("namedCache");
cache1.put("hello", "world");
String value = cache2.get("hello"); // Returns "world" if clustering is working
// --
public static class TestClassLoader extends ClassLoader {
public TestClassLoader(ClassLoader parent) {
super(parent);
}
}
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