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Java > Open Source Codes > org > apache > james > transport > mailets > PostmasterAlias


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2  * Copyright (c) 2000-2004 The Apache Software Foundation. *
3  * All rights reserved. *
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5  * Licensed under the Apache License, Version 2.0 (the "License"); you *
6  * may not use this file except in compliance with the License. You *
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9  * http://www.apache.org/licenses/LICENSE-2.0 *
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14  * implied. See the License for the specific language governing *
15  * permissions and limitations under the License. *
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17
18 package org.apache.james.transport.mailets;
19
20 import org.apache.mailet.GenericMailet;
21 import org.apache.mailet.Mail;
22 import org.apache.mailet.MailAddress;
23 import org.apache.mailet.MailetContext;
24
25 import javax.mail.MessagingException JavaDoc;
26 import java.util.Collection JavaDoc;
27 import java.util.Iterator JavaDoc;
28 import java.util.Vector JavaDoc;
29 //import com.workingdogs.town.*;
30
31 /**
32  * Rewrites recipient addresses to make sure email for the postmaster is
33  * always handled. This mailet is silently inserted at the top of the root
34  * spool processor. All recipients mapped to postmaster@<servernames> are
35  * changed to the postmaster account as specified in the server conf.
36  *
37  */
38 public class PostmasterAlias extends GenericMailet {
39
40     /**
41      * Make sure that a message that is addressed to a postmaster alias is always
42      * sent to the postmaster address, regardless of delivery to other recipients.
43      *
44      * @param mail the mail to process
45      *
46      * @throws MessagingException if an error is encountered while modifying the message
47      */
48     public void service(Mail mail) throws MessagingException JavaDoc {
49         Collection JavaDoc recipients = mail.getRecipients();
50         Collection JavaDoc recipientsToRemove = null;
51         MailetContext mailetContext = getMailetContext();
52         boolean postmasterAddressed = false;
53
54         for (Iterator JavaDoc i = recipients.iterator(); i.hasNext(); ) {
55             MailAddress addr = (MailAddress)i.next();
56             if (addr.getUser().equalsIgnoreCase("postmaster") &&
57                 mailetContext.isLocalServer(addr.getHost())) {
58                 //Should remove this address... we want to replace it with
59 // the server's postmaster address
60 if (recipientsToRemove == null) {
61                     recipientsToRemove = new Vector JavaDoc();
62                 }
63                 recipientsToRemove.add(addr);
64                 //Flag this as having found the postmaster
65 postmasterAddressed = true;
66             }
67         }
68         if (postmasterAddressed) {
69             recipients.removeAll(recipientsToRemove);
70             recipients.add(getMailetContext().getPostmaster());
71         }
72     }
73
74     /**
75      * Return a string describing this mailet.
76      *
77      * @return a string describing this mailet
78      */
79     public String JavaDoc getMailetInfo() {
80         return "Postmaster aliasing mailet";
81     }
82 }
83
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