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Java > Open Source Codes > org > jboss > aspects > asynch > AsynchProxyMixin


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.asynch;
23
24 import org.jboss.aop.InstanceAdvisor;
25 import org.jboss.aop.util.PayloadKey;
26
27 import java.io.Externalizable JavaDoc;
28 import java.io.IOException JavaDoc;
29 import java.io.ObjectInput JavaDoc;
30 import java.io.ObjectOutput JavaDoc;
31
32 /**
33  * Comment
34  *
35  * @author <a HREF="mailto:bill@jboss.org">Bill Burke</a>
36  * @version $Revision: 37406 $
37  */
38 public class AsynchProxyMixin implements AsynchProvider, Externalizable JavaDoc
39 {
40    private static final long serialVersionUID = -6895953696792282031L;
41
42    public static final String JavaDoc CURRENT_FUTURE = "CURRENT_FUTURE";
43    private transient ThreadLocal JavaDoc currentFuture;
44
45    private InstanceAdvisor advisor;
46
47    public void setAdvisor(InstanceAdvisor advisor)
48    {
49       this.advisor = advisor;
50    }
51
52
53    public void setFuture(Future future)
54    {
55       try
56       {
57          Future oldFuture = getFuture();
58          if (oldFuture != null) oldFuture.release();
59       }
60       catch (Exception JavaDoc e)
61       {
62          // eat it.
63 }
64       currentFuture.set(future);
65    }
66
67    public Future getFuture()
68    {
69       Future future = (Future) currentFuture.get();
70       currentFuture.set(null);
71       return future;
72    }
73
74    public void writeExternal(ObjectOutput JavaDoc out) throws IOException JavaDoc
75    {
76       out.writeObject(advisor);
77    }
78
79    public void readExternal(ObjectInput JavaDoc in) throws IOException JavaDoc, ClassNotFoundException JavaDoc
80    {
81       advisor = (InstanceAdvisor) in.readObject();
82       currentFuture = new ThreadLocal JavaDoc();
83       advisor.getMetaData().addMetaData(CURRENT_FUTURE, CURRENT_FUTURE, currentFuture, PayloadKey.TRANSIENT);
84    }
85 }
86
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