ProxyFactoryInterceptor


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14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
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21  */
22  package org.jboss.naming.interceptors;
23  
24  import javax.management.MBeanServer  ;
25  import javax.management.ObjectName  ;
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   proxyName;
45     private Naming proxy;
46  
47     public void setProxyName(String   proxyName)
48     {
49        this.proxyName = proxyName;
50     }
51  
52     // Interceptor overrides -----------------------------------------
53     public Object   invoke(Invocation invocation) throws Throwable  
54     {
55        Object   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  
71     {
72        if( proxy != null )
73           return;
74  
75        ObjectName   proxyFactory = new ObjectName  (proxyName);
76        MBeanServer   server = MBeanServerLocator.locateJBoss();
77        proxy = (Naming) server.getAttribute(proxyFactory, "Proxy");
78     }
79  }
80
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