KickJava   Java API By Example, From Geeks To Geeks.

Java > Open Source Codes > org > jboss > naming > interceptors > ProxyFactoryInterceptor


1 /*
2 * JBoss, Home of Professional Open Source
3 * Copyright 2005, JBoss Inc., and individual contributors as indicated
4 * by the @authors tag. See the copyright.txt in the distribution for a
5 * full listing of individual contributors.
6 *
7 * This is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU Lesser General Public License as
9 * published by the Free Software Foundation; either version 2.1 of
10 * the License, or (at your option) any later version.
11 *
12 * This software is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with this software; if not, write to the Free
19 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
20 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
21 */

22 package org.jboss.naming.interceptors;
23
24 import javax.management.MBeanServer JavaDoc;
25 import javax.management.ObjectName JavaDoc;
26
27 import org.jboss.logging.Logger;
28 import org.jboss.mx.interceptor.AbstractInterceptor;
29 import org.jboss.mx.server.Invocation;
30 import org.jboss.mx.util.MBeanServerLocator;
31 import org.jnp.interfaces.Naming;
32 import org.jnp.interfaces.NamingContext;
33
34 /** An interceptor that replaces any NamingContext values returned with the
35  * proxy found as the Proxy attribute of the mbean given by proxyName.
36  *
37  * @author Scott.Stark@jboss.org
38  * @version $Revision: 37459 $
39  */

40 public class ProxyFactoryInterceptor
41    extends AbstractInterceptor
42 {
43    private static Logger log = Logger.getLogger(ProxyFactoryInterceptor.class);
44    private String JavaDoc proxyName;
45    private Naming proxy;
46
47    public void setProxyName(String JavaDoc proxyName)
48    {
49       this.proxyName = proxyName;
50    }
51
52    // Interceptor overrides -----------------------------------------
53
public Object JavaDoc invoke(Invocation invocation) throws Throwable JavaDoc
54    {
55       Object JavaDoc value = invocation.nextInterceptor().invoke(invocation);
56       if( value instanceof NamingContext )
57       {
58          initNamingProxy();
59          NamingContext ctx = (NamingContext) value;
60          ctx.setNaming(proxy);
61       }
62       return value;
63    }
64
65    /** This is not synchronized as we don't care if the proxy object might
66     * get lookedup more than once on initialization
67     * @throws Exception
68     */

69    private void initNamingProxy()
70       throws Exception JavaDoc
71    {
72       if( proxy != null )
73          return;
74
75       ObjectName JavaDoc proxyFactory = new ObjectName JavaDoc(proxyName);
76       MBeanServer JavaDoc server = MBeanServerLocator.locateJBoss();
77       proxy = (Naming) server.getAttribute(proxyFactory, "Proxy");
78    }
79 }
80
Popular Tags