/**
* Redistribution and use of this software and associated documentation
* ("Software"), with or without modification, are permitted provided
* that the following conditions are met:
*
* 1. Redistributions of source code must retain copyright
* statements and notices. Redistributions must also contain a
* copy of this document.
*
* 2. Redistributions in binary form must reproduce the
* above copyright notice, this list of conditions and the
* following disclaimer in the documentation and/or other
* materials provided with the distribution.
*
* 3. The name "Exolab" must not be used to endorse or promote
* products derived from this Software without prior written
* permission of Exoffice Technologies. For written permission,
* please contact info@exolab.org.
*
* 4. Products derived from this Software may not be called "Exolab"
* nor may "Exolab" appear in their names without prior written
* permission of Exoffice Technologies. Exolab is a registered
* trademark of Exoffice Technologies.
*
* 5. Due credit should be given to the Exolab Project
* (http://www.exolab.org/).
*
* THIS SOFTWARE IS PROVIDED BY EXOFFICE TECHNOLOGIES AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT
* NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
* EXOFFICE TECHNOLOGIES OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*
* Copyright 2003-2004 (C) Exoffice Technologies Inc. All Rights Reserved.
*
* $Id: RegistryImpl.java,v 1.1 2004/11/26 01:51:04 tanderson Exp $
*/
package org.exolab.jms.net.orb;
import java.rmi.AccessException;
import java.rmi.AlreadyBoundException;
import java.rmi.NotBoundException;
import java.util.HashMap;
import org.exolab.jms.net.proxy.Proxy;
import org.exolab.jms.net.registry.Registry;
/**
* The <code>RegistryImpl</code> provides a simple interface for binding and
* retrieving remote object references by name.
*
* @author <a href="mailto:tma@netspace.net.au">Tim Anderson</a>
* @version $Revision: 1.1 $ $Date: 2004/11/26 01:51:04 $
*/
class RegistryImpl implements Registry {
/**
* The registry service proxy class name
*/
public static final String PROXY =
RegistryImpl.class.getName() + "__Proxy";
/**
* A map of bindings to proxies
*/
private HashMap _registry = new HashMap();
/**
* Determines if the registry is read-only for remote users
*/
private boolean _readOnly = false;
/**
* Construct a new <code>RegistryImpl</code>
*/
public RegistryImpl() {
}
/**
* Returns a proxy for the remote object associated with the specified name
*
* @param name the name the proxy is bound under
* @return proxy the proxy for the remote object
* @throws NotBoundException if <code>name<code> is not bound
*/
public synchronized Proxy lookup(String name) throws NotBoundException {
Proxy proxy = (Proxy) _registry.get(name);
if (proxy == null) {
throw new NotBoundException(name);
}
return proxy;
}
/**
* Binds the specified name to a remote object.
*
* @param name the name of the binding
* @param proxy the proxy for the remote object
* @throws AccessException if the caller doesn't have permission to
* bind the object
* @throws AlreadyBoundException if <code>name</code> is already bound
*/
public synchronized void bind(String name, Proxy proxy)
throws AccessException, AlreadyBoundException {
checkReadOnly();
doBind(name, proxy);
}
/**
* Removes the binding for the specified name
*
* @param name the name of the binding
* @throws AccessException if the caller doesn't have permission to unbind
* the object
* @throws NotBoundException if <code>name<code> is not bound
*/
public synchronized void unbind(String name)
throws AccessException, NotBoundException {
checkReadOnly();
doUnbind(name);
}
/**
* Binds the specified name to a remote object.
*
* @param name the name of the binding
* @param proxy the proxy for the remote object
* @throws AlreadyBoundException if <code>name</code> is already bound
*/
protected synchronized void doBind(String name, Proxy proxy)
throws AlreadyBoundException {
if (_registry.containsKey(name)) {
throw new AlreadyBoundException(name);
}
_registry.put(name, proxy);
}
/**
* Removes the binding for the specified name
*
* @param name the name of the binding
* @throws NotBoundException if <code>name<code> is not bound
*/
protected synchronized void doUnbind(String name)
throws NotBoundException {
Object proxy = _registry.remove(name);
if (proxy == null) {
throw new NotBoundException(name);
}
}
/**
* Set if the registry is read-only
*
* @param readOnly if <code>true</code>, prevent remote users from modifying
* bindings
*/
protected synchronized void setReadOnly(boolean readOnly) {
_readOnly = readOnly;
}
/**
* Determines if the registry is read-only
*
* @return <code>true</code> if the registry is read-only
*/
protected synchronized boolean getReadOnly() {
return _readOnly;
}
/**
* Checks if the registry is read-only
*
* @throws AccessException if the registry is read-only
*/
private void checkReadOnly() throws AccessException {
if (_readOnly) {
throw new AccessException("Registry is read-only");
}
}
}