View Javadoc

1   /*
2    * $Id: SmtpMessageDispatcher.java 19191 2010-08-25 21:05:23Z tcarlson $
3    * --------------------------------------------------------------------------------------
4    * Copyright (c) MuleSoft, Inc.  All rights reserved.  http://www.mulesoft.com
5    *
6    * The software in this package is published under the terms of the CPAL v1.0
7    * license, a copy of which has been included with this distribution in the
8    * LICENSE.txt file.
9    */
10  
11  package org.mule.transport.email;
12  
13  import org.mule.DefaultMuleMessage;
14  import org.mule.api.MuleEvent;
15  import org.mule.api.MuleMessage;
16  import org.mule.api.endpoint.EndpointException;
17  import org.mule.api.endpoint.EndpointURI;
18  import org.mule.api.endpoint.OutboundEndpoint;
19  import org.mule.api.transport.DispatchException;
20  import org.mule.config.i18n.CoreMessages;
21  import org.mule.config.i18n.MessageFactory;
22  import org.mule.transport.AbstractMessageDispatcher;
23  import org.mule.transport.NullPayload;
24  
25  import com.sun.mail.smtp.SMTPTransport;
26  
27  import java.net.URLDecoder;
28  import java.util.Calendar;
29  
30  import javax.mail.Message;
31  import javax.mail.MessagingException;
32  import javax.mail.Transport;
33  
34  /**
35   * <code>SmtpMessageDispatcher</code> will dispatch Mule events as Mime email
36   * messages over an SMTP gateway.
37   * 
38   * This contains a reference to a transport (and endpoint and connector, via superclasses)
39   */
40  public class SmtpMessageDispatcher extends AbstractMessageDispatcher
41  {
42      private volatile Transport transport;
43  
44      public SmtpMessageDispatcher(OutboundEndpoint endpoint)
45      {
46          super(endpoint);
47      }
48  
49      private SmtpConnector castConnector()
50      {
51          return (SmtpConnector) getConnector();
52      }
53  
54      @Override
55      protected void doConnect() throws Exception
56      {
57          if (transport == null)
58          {
59              try
60              {
61  
62                  transport = castConnector().getSessionDetails(endpoint).newTransport();
63                  EndpointURI uri = endpoint.getEndpointURI();
64                  String encoding = endpoint.getEncoding();
65                  String user = (uri.getUser()!=null ? URLDecoder.decode(uri.getUser(), encoding) : null);
66                  String pass = (uri.getPassword()!=null ? URLDecoder.decode(uri.getPassword(), encoding) : null);
67                  transport.connect(uri.getHost(), uri.getPort(),  user, pass);
68              }
69              catch (Exception e)
70              {
71                  throw new EndpointException(
72                      MessageFactory.createStaticMessage("Unable to connect to mail transport."), e);
73              }
74          }
75      }
76  
77      @Override
78      protected void doDisconnect() throws Exception
79      {
80          if (null != transport)
81          {
82              try
83              {
84                  transport.close();
85              }
86              finally
87              {
88                  transport = null;
89              }
90          }
91      }
92  
93      @Override
94      protected void doDispatch(MuleEvent event) throws Exception
95      {
96          Object data = event.getMessage().getPayload();
97  
98          if (!(data instanceof Message))
99          {
100             throw new DispatchException(
101                 CoreMessages.transformUnexpectedType(data.getClass(), Message.class),
102                 event, this);
103         }
104         else
105         {
106             // Check the message for any unset data and use defaults
107             sendMailMessage((Message) data);
108         }
109     }
110 
111     @Override
112     protected MuleMessage doSend(MuleEvent event) throws Exception
113     {
114         doDispatch(event);
115         return new DefaultMuleMessage(NullPayload.getInstance(), connector.getMuleContext());
116     }
117 
118     protected void sendMailMessage(Message message) throws MessagingException
119     {
120         // sent date
121         message.setSentDate(Calendar.getInstance().getTime());
122 
123          // Double check that the transport is still connected as some SMTP servers may 
124          // disconnect idle connections.
125         if (isTransportConnected() == false)
126         {
127             EndpointURI uri = endpoint.getEndpointURI();
128             if (logger.isInfoEnabled())
129             {
130                 logger.info("Connection closed by remote server. Reconnecting.");
131             }
132             transport.connect(uri.getHost(), uri.getPort(), uri.getUser(), uri.getPassword());
133         }
134 
135         transport.sendMessage(message, message.getAllRecipients());
136 
137         if (logger.isDebugEnabled())
138         {
139             StringBuffer msg = new StringBuffer();
140             msg.append("Email message sent with subject'").append(message.getSubject()).append("' sent- ");
141             msg.append(", From: ").append(MailUtils.mailAddressesToString(message.getFrom())).append(" ");
142             msg.append(", To: ").append(
143                 MailUtils.mailAddressesToString(message.getRecipients(Message.RecipientType.TO))).append(" ");
144             msg.append(", Cc: ").append(
145                 MailUtils.mailAddressesToString(message.getRecipients(Message.RecipientType.CC))).append(" ");
146             msg.append(", Bcc: ")
147             .append(MailUtils.mailAddressesToString(message.getRecipients(Message.RecipientType.BCC)))
148             .append(" ");
149             msg.append(", ReplyTo: ").append(MailUtils.mailAddressesToString(message.getReplyTo()));
150 
151             logger.debug(msg.toString());
152         }
153 
154     }
155     
156     // Fix incompatibility between JavaMail and Exchange 
157     // see http://forums.sun.com/thread.jspa?threadID=5409031&tstart=1
158     protected boolean isTransportConnected()
159     {
160         boolean isConnected = false;
161         
162         isConnected = transport.isConnected();
163         if (isConnected)
164         {
165             SMTPTransport smtpTransport = (SMTPTransport) transport;
166             
167             String lastServerResponse = smtpTransport.getLastServerResponse();
168             if (lastServerResponse.startsWith("250") == false) 
169             {
170                 isConnected = false;
171                 try
172                 {
173                     smtpTransport.close();
174                 }
175                 catch (MessagingException me)
176                 {
177                     if (logger.isInfoEnabled())
178                     {
179                         logger.info("Unable to close SMTP Transport", me);
180                     }
181                 }
182             }
183         }
184         
185         return isConnected;
186     }
187 
188     @Override
189     protected void doDispose()
190     {
191         // nothing doing
192     }
193 
194 }