SimpleCacheFactoryService.java example

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wildfly-master
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 * as indicated by the @author tags. See the copyright.txt file in the
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 *
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 * published by the Free Software Foundation; either version 2.1 of
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 *
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 * Lesser General Public License for more details.
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package org.jboss.as.ejb3.cache.simple;

import java.util.concurrent.ScheduledExecutorService;

import org.jboss.as.ejb3.cache.Cache;
import org.jboss.as.ejb3.cache.CacheFactory;
import org.jboss.as.ejb3.cache.Identifiable;
import org.jboss.as.ejb3.cache.StatefulObjectFactory;
import org.jboss.as.ejb3.component.stateful.StatefulTimeoutInfo;
import org.jboss.as.server.ServerEnvironment;
import org.jboss.as.server.ServerEnvironmentService;
import org.jboss.msc.service.AbstractService;
import org.jboss.msc.service.ServiceBuilder;
import org.jboss.msc.service.ServiceName;
import org.jboss.msc.service.ServiceTarget;
import org.jboss.msc.value.InjectedValue;
import org.wildfly.clustering.ejb.BeanContext;
import org.wildfly.clustering.ejb.IdentifierFactory;
import org.wildfly.clustering.ejb.PassivationListener;

/**
 * Service that provides a simple {@link CacheFactory}.
 *
 * @author Paul Ferraro
 *
 * @param <K> the cache key type
 * @param <V> the cache value type
 */
public class SimpleCacheFactoryService<K, V extends Identifiable<K>> extends AbstractService<CacheFactory<K, V>> implements CacheFactory<K, V> {

    public static <K, V extends Identifiable<K>> ServiceBuilder<CacheFactory<K, V>> build(String name, ServiceTarget target, ServiceName serviceName, BeanContext context, StatefulTimeoutInfo timeout) {
        SimpleCacheFactoryService<K, V> service = new SimpleCacheFactoryService<>(timeout);
        return target.addService(serviceName, service)
                .addDependency(ServerEnvironmentService.SERVICE_NAME, ServerEnvironment.class, service.environment)
                .addDependency(context.getDeploymentUnitServiceName().append(name, "expiration"), ScheduledExecutorService.class, service.executor)
        ;
    }

    private final InjectedValue<ServerEnvironment> environment = new InjectedValue<>();
    private final InjectedValue<ScheduledExecutorService> executor = new InjectedValue<>();
    private final StatefulTimeoutInfo timeout;

    private SimpleCacheFactoryService(StatefulTimeoutInfo timeout) {
        this.timeout = timeout;
    }

    @Override
    public CacheFactory<K, V> getValue() {
        return this;
    }

    @Override
    public Cache<K, V> createCache(IdentifierFactory<K> identifierFactory, StatefulObjectFactory<V> factory, PassivationListener<V> passivationListener) {
        return new SimpleCache<>(factory, identifierFactory, this.timeout, this.environment.getValue(), this.executor.getValue());
    }
}