Package org.jboss.as.ejb3.component.stateful

Source Code of org.jboss.as.ejb3.component.stateful.StatefulSessionComponent

/*
* JBoss, Home of Professional Open Source.
* Copyright (c) 2011, Red Hat, Inc., and individual contributors
* as indicated by the @author tags. See the copyright.txt file in the
* distribution for a full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.as.ejb3.component.stateful;

import org.jboss.as.ee.component.AbstractComponentInstance;
import org.jboss.as.ee.component.Component;

import org.jboss.as.ejb3.component.session.SessionBeanComponent;
import org.jboss.ejb3.cache.Cache;
import org.jboss.ejb3.cache.NoPassivationCache;
import org.jboss.ejb3.cache.StatefulObjectFactory;

import org.jboss.invocation.Interceptor;
import org.jboss.invocation.InterceptorContext;
import org.jboss.invocation.InterceptorFactoryContext;

import javax.ejb.AccessTimeout;
import java.io.Serializable;
import java.lang.annotation.Annotation;
import java.util.List;
import java.util.concurrent.TimeUnit;

/**
* Stateful Session Bean
*
* @author <a href="mailto:cdewolf@redhat.com">Carlo de Wolf</a>
*/
public class StatefulSessionComponent extends SessionBeanComponent {
    private final AccessTimeout accessTimeout;
    private Cache<StatefulSessionComponentInstance> cache;

    /**
     * Construct a new instance.
     *
     * @param configuration         the component configuration
     */
    protected StatefulSessionComponent(final StatefulSessionComponentConfiguration configuration) {
        super(configuration);

        // TODO: must come from configuration
        accessTimeout = new AccessTimeout() {
            @Override
            public long value() {
                return 5;
            }

            @Override
            public TimeUnit unit() {
                return TimeUnit.MINUTES;
            }

            @Override
            public Class<? extends Annotation> annotationType() {
                return AccessTimeout.class;
            }
        };

        cache = new NoPassivationCache<StatefulSessionComponentInstance>();
        cache.setStatefulObjectFactory(new StatefulObjectFactory<StatefulSessionComponentInstance>() {
            @Override
            public StatefulSessionComponentInstance createInstance() {
                return (StatefulSessionComponentInstance) StatefulSessionComponent.this.createInstance();
            }

            @Override
            public void destroyInstance(StatefulSessionComponentInstance instance) {
                StatefulSessionComponent.this.destroyInstance(instance);
            }
        });
    }

    @Override
    public Interceptor createClientInterceptor(Class<?> view) {
        final Serializable sessionId = createSession();
        return createClientInterceptor(view,sessionId);
    }

    @Override
    public Interceptor createClientInterceptor(Class<?> view, final Serializable sessionId) {
        return new Interceptor() {
            @Override
            public Object processInvocation(InterceptorContext context) throws Exception {
                // TODO: attaching as Serializable.class is a bit wicked
                context.putPrivateData(Serializable.class, sessionId);
                // TODO: this won't work for remote proxies
                context.putPrivateData(Component.class, StatefulSessionComponent.this);
                try {
                    return context.proceed();
                }
                finally {
                    context.putPrivateData(Serializable.class, null);
                    context.putPrivateData(Component.class, null);
                }
            }
        };
    }

    public Serializable createSession() {
        return getCache().create().getId();
    }

    protected Cache<StatefulSessionComponentInstance> getCache() {
        return cache;
    }

    @Override
    protected AbstractComponentInstance constructComponentInstance(Object instance, List<Interceptor> preDestroyInterceptors, InterceptorFactoryContext context) {
        return new StatefulSessionComponentInstance(this, instance, preDestroyInterceptors, context);
    }

    protected AccessTimeout getAccessTimeout() {
        return accessTimeout;
    }
}
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