/*
* 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.deployment;
import org.jboss.as.naming.logging.NamingLogger;
import org.jboss.as.server.deployment.AttachmentKey;
import org.jboss.as.server.deployment.DeploymentUnit;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
/**
* Configuration object used to managed a collection a JNDI namespace bindings for a deployment. This is primarily used
* to detect duplicate namespace bindings.
*
* @author John E. Bailey
*/
public class NamespaceBindings {
public static final AttachmentKey<NamespaceBindings> ATTACHMENT_KEY = AttachmentKey.create(NamespaceBindings.class);
private final ConcurrentMap<JndiName, Object> bindings = new ConcurrentHashMap<JndiName, Object>();
/**
* Get the namespace bindings for a deployment context.
*
* @param context The deployment context
* @return The existing namespace bindings, or a new instance if they don't already exist.
*/
public static NamespaceBindings getNamespaceBindings(final DeploymentUnit context) {
NamespaceBindings namespaceBindings = context.getAttachment(ATTACHMENT_KEY);
if(namespaceBindings == null) {
namespaceBindings = new NamespaceBindings();
context.putAttachment(ATTACHMENT_KEY, namespaceBindings);
}
return namespaceBindings;
}
/**
* Add a new namespace binding for this deployment. This will return a boolean that can be used to determine if this
* is the authoritative binding (the first), and should actually be performed.
*
* @param name The JNDI name of the binding
* @param value The value of the binding
* @return true if this is the authoritative binding
* @throws DuplicateBindingException If this binding already exists and is not compatible with the existing binding.
*/
public boolean addBinding(final JndiName name, final Object value) throws DuplicateBindingException {
final Object existing = bindings.putIfAbsent(name, value);
if (existing != null && !existing.equals(value)) {
throw new DuplicateBindingException(NamingLogger.ROOT_LOGGER.duplicateBinding(name, existing, value));
}
return existing == null;
}
}