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Java > Open Source Codes > org > jboss > aspects > remoting > ReplicantsManagerInterceptor


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.aspects.remoting;
23
24 import org.jboss.ha.framework.server.HATarget;
25
26 import java.util.ArrayList JavaDoc;
27 import java.util.Map JavaDoc;
28
29 /**
30  * Checks to see if this object is local in VM
31  *
32  * @author <a HREF="mailto:bill@jboss.org">Bill Burke</a>
33  * @version $Revision: 37406 $
34  */
35 public class ReplicantsManagerInterceptor implements org.jboss.aop.advice.Interceptor, ClusterConstants
36 {
37    private final Map JavaDoc families;
38
39    public ReplicantsManagerInterceptor(Map JavaDoc families)
40    {
41       this.families = families;
42    }
43
44    public String JavaDoc getName()
45    {
46       return this.getClass().getName();
47    }
48
49    public Object JavaDoc invoke(org.jboss.aop.joinpoint.Invocation invocation) throws Throwable JavaDoc
50    {
51       Object JavaDoc response = invocation.invokeNext();
52       String JavaDoc clientFamily = (String JavaDoc) invocation.getMetaData(CLUSTERED_REMOTING, CLUSTER_FAMILY);
53
54       HATarget target = (HATarget) families.get(clientFamily);
55       if (target == null)
56       {
57          return response;
58       }
59
60       Long JavaDoc clientViewId = (Long JavaDoc) invocation.getMetaData(CLUSTERED_REMOTING, CLUSTER_VIEW_ID);
61       if (clientViewId == null)
62       {
63          // Maybe we're being invoked upon by a non-clustered proxy
64 return response;
65       }
66       if (clientViewId.longValue() != target.getCurrentViewId())
67       {
68          invocation.addResponseAttachment("replicants", new ArrayList JavaDoc(target.getReplicants()));
69          invocation.addResponseAttachment("viewId", new Long JavaDoc(target.getCurrentViewId()));
70       }
71       return response;
72    }
73 }
74
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