/*
* JBoss, Home of Professional Open Source.
* Copyright 2010, 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.naming.service;
import static org.jboss.as.naming.NamingLogger.ROOT_LOGGER;
import java.util.concurrent.atomic.AtomicInteger;
import org.jboss.as.naming.ManagedReferenceFactory;
import org.jboss.as.naming.ServiceBasedNamingStore;
import org.jboss.msc.inject.Injector;
import org.jboss.msc.service.Service;
import org.jboss.msc.service.ServiceController;
import org.jboss.msc.service.StartContext;
import org.jboss.msc.service.StartException;
import org.jboss.msc.service.StopContext;
import org.jboss.msc.value.InjectedValue;
/**
* Service responsible for binding and unbinding a entry into a naming context. This service can be used as a dependency for
* any service that needs to retrieve this entry from the context.
*
* @author John E. Bailey
* @author Eduardo Martins
*/
public class BinderService implements Service<ManagedReferenceFactory> {
private final InjectedValue<ServiceBasedNamingStore> namingStoreValue = new InjectedValue<ServiceBasedNamingStore>();
private final String name;
private final InjectedValue<ManagedReferenceFactory> managedReferenceFactory = new InjectedValue<ManagedReferenceFactory>();
private final Object source;
private final AtomicInteger refcnt = new AtomicInteger(0);
private ServiceController<?> controller;
/**
* Construct new instance.
*
* @param name The JNDI name to use for binding. May be either an absolute or relative name
*/
public BinderService(final String name, Object source) {
if (name.startsWith("java:")) {
//this is an absolute reference
this.name = name.substring(name.indexOf('/') + 1);
} else {
this.name = name;
}
this.source = source;
}
public BinderService(final String name) {
this(name, null);
}
public Object getSource() {
return source;
}
public void acquire() {
refcnt.incrementAndGet();
}
public void release() {
if (refcnt.decrementAndGet() <= 0)
controller.setMode(ServiceController.Mode.REMOVE);
}
/**
* Bind the entry into the injected context.
*
* @param context The start context
* @throws StartException If the entity can not be bound
*/
public synchronized void start(StartContext context) throws StartException {
final ServiceBasedNamingStore namingStore = namingStoreValue.getValue();
ServiceController<?> controller = context.getController();
this.controller = controller;
namingStore.add(controller.getName());
ROOT_LOGGER.tracef("Bound resource %s into naming store %s (service name %s)", name, namingStore, controller.getName());
}
/**
* Unbind the entry from the injected context.
*
* @param context The stop context
*/
public synchronized void stop(StopContext context) {
final ServiceBasedNamingStore namingStore = namingStoreValue.getValue();
namingStore.remove(context.getController().getName());
}
/**
* Get the value from the injected context.
*
* @return The value of the named entry
* @throws IllegalStateException
*/
public synchronized ManagedReferenceFactory getValue() throws IllegalStateException {
return managedReferenceFactory.getValue();
}
/**
* Get the injector for the item to be bound.
*
* @return the injector
*/
public Injector<ManagedReferenceFactory> getManagedObjectInjector() {
return managedReferenceFactory;
}
/**
* Get the naming store injector.
*
* @return the injector
*/
public Injector<ServiceBasedNamingStore> getNamingStoreInjector() {
return namingStoreValue;
}
@Override
public String toString() {
return "BinderService[name=" + name + ",source=" + source + "]";
}
}