MimePartDSMailerBean


1   /**
2    * JOnAS: Java(TM) Open Application Server
3    * Copyright (C) 1999-2004 Bull S.A.
4    * Contact: jonas-team@objectweb.org
5    *
6    * This library is free software; you can redistribute it and/or
7    * modify it under the terms of the GNU Lesser General Public
8    * License as published by the Free Software Foundation; either
9    * version 2.1 of the License, or any later version.
10   *
11   * This library is distributed in the hope that it will be useful,
12   * but WITHOUT ANY WARRANTY; without even the implied warranty of
13   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
14   * Lesser General Public License for more details.
15   *
16   * You should have received a copy of the GNU Lesser General Public
17   * License along with this library; if not, write to the Free Software
18   * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307
19   * USA
20   *
21   * Initial developer(s): Florent BENOIT & Ludovic BERT
22   * --------------------------------------------------------------------------
23   * $Id: MimePartDSMailerBean.java,v 1.2 2004/04/19 06:39:29 benoitf Exp $
24   * --------------------------------------------------------------------------
25   */
26  
27  package mailsb;
28  
29  //import java
30  import java.rmi.RemoteException;
31  
32  //import javax
33  import javax.ejb.EJBException;
34  import javax.ejb.SessionBean;
35  import javax.ejb.SessionContext;
36  
37  import javax.mail.Message;
38  import javax.mail.MessageContext;
39  import javax.mail.MessagingException;
40  import javax.mail.Transport;
41  import javax.mail.internet.MimePartDataSource;
42  import javax.naming.InitialContext;
43  import javax.naming.NamingException;
44  
45  /**
46   * Implementation of the mailer Session Bean. It uses
47   * javax.mail.internet.MimePartDataSource This bean is a statefull, and
48   * synchronized bean. The container uses the SessionBean methods to notify the
49   * enterprise Bean instances of the instance's life cycle events.
50   * @author Florent Benoit
51   * @author Ludovic Bert
52   */
53  public class MimePartDSMailerBean implements SessionBean {
54  
55      /**
56       * Name of the bean
57       */
58      private String name = null;
59  
60      /**
61       * Session context that the container provides for a session enterprise Bean
62       * instance.
63       */
64      private SessionContext sessionContext = null;
65  
66      /**
67       * Reference to the javax.mail.Message object which is the message to send
68       * with javamail
69       */
70      private Message message = null;
71  
72      /* ========================= ejbCreate methods =========================== */
73  
74      /**
75       * There must be one ejbCreate() method per create() method on the Home
76       * interface, and with the same signature.
77       * @param name the name of the bean
78       */
79      public void ejbCreate(String name) {
80          this.name = name;
81      }
82  
83      /* =============== javax.ejb.SessionBean 2.0 implementation ============== */
84  
85      /**
86       * Set the associated session context. The container calls this method after
87       * the instance creation. The enterprise Bean instance should store the
88       * reference to the context object in an instance variable. This method is
89       * called with no transaction context.
90       * @param sessionContext A SessionContext interface for the instance.
91       * @throws EJBException Thrown by the method to indicate a failure caused by
92       *         a system-level error.
93       * @throws java.rmi.RemoteException This exception is defined in the method
94       *         signature to provide backward compatibility for applications
95       *         written for the EJB 1.0 specification. Enterprise beans written
96       *         for the EJB 1.1 specification should throw the
97       *         javax.ejb.EJBException instead of this exception. Enterprise
98       *         beans written for the EJB2.0 and higher specifications must throw
99       *         the javax.ejb.EJBException instead of this exception.
100      */
101     public void setSessionContext(SessionContext sessionContext) throws EJBException, java.rmi.RemoteException {
102         this.sessionContext = sessionContext;
103     }
104 
105     /**
106      * A container invokes this method before it ends the life of the session
107      * object. This happens as a result of a client's invoking a remove
108      * operation, or when a container decides to terminate the session object
109      * after a timeout. This method is called with no transaction context.
110      * @throws EJBException Thrown by the method to indicate a failure caused by
111      *         a system-level error.
112      * @throws java.rmi.RemoteException This exception is defined in the method
113      *         signature to provide backward compatibility for enterprise beans
114      *         written for the EJB 1.0 specification. Enterprise beans written
115      *         for the EJB 1.1 specification should throw the
116      *         javax.ejb.EJBException instead of this exception. Enterprise
117      *         beans written for the EJB2.0 and higher specifications must throw
118      *         the javax.ejb.EJBException instead of this exception.
119      */
120     public void ejbRemove() throws EJBException, java.rmi.RemoteException {
121         // Nothing to do for this simple mailer example
122     }
123 
124     /**
125      * The activate method is called when the instance is activated from its
126      * "passive" state. The instance should acquire any resource that it has
127      * released earlier in the ejbPassivate() method. This method is called with
128      * no transaction context.
129      * @throws EJBException Thrown by the method to indicate a failure caused by
130      *         a system-level error.
131      * @throws java.rmi.RemoteException This exception is defined in the method
132      *         signature to provide backward compatibility for enterprise beans
133      *         written for the EJB 1.0 specification. Enterprise beans written
134      *         for the EJB 1.1 specification should throw the
135      *         javax.ejb.EJBException instead of this exception. Enterprise
136      *         beans written for the EJB2.0 and higher specifications must throw
137      *         the javax.ejb.EJBException instead of this exception.
138      */
139     public void ejbActivate() throws EJBException, java.rmi.RemoteException {
140         // Nothing to do for this simple mailer example
141     }
142 
143     /**
144      * The passivate method is called before the instance enters the "passive"
145      * state. The instance should release any resources that it can re-acquire
146      * later in the ejbActivate() method. After the passivate method completes,
147      * the instance must be in a state that allows the container to use the Java
148      * Serialization protocol to externalize and store away the instance's
149      * state. This method is called with no transaction context.
150      * @throws EJBException Thrown by the method to indicate a failure caused by
151      *         a system-level error.
152      * @throws java.rmi.RemoteException This exception is defined in the method
153      *         signature to provide backward compatibility for enterprise beans
154      *         written for the EJB 1.0 specification. Enterprise beans written
155      *         for the EJB 1.1 specification should throw the
156      *         javax.ejb.EJBException instead of this exception. Enterprise
157      *         beans written for the EJB2.0 and higher specifications must throw
158      *         the javax.ejb.EJBException instead of this exception.
159      */
160     public void ejbPassivate() throws EJBException, java.rmi.RemoteException {
161         // Nothing to do for this simple mailer example
162     }
163 
164     /* ======================== Mailer implementation ======================== */
165 
166     /**
167      * Set the message with a specific recipient, subject and content.
168      * @param content the content of the message.
169      * @throws Exception if a problem occurs.
170      * @throws RemoteException if the call failed.
171      */
172     public void setMessage(String content) throws Exception, RemoteException {
173 
174         //Get the initial context
175         InitialContext ictx = null;
176         try {
177             ictx = new InitialContext();
178         } catch (NamingException e) {
179             throw new Exception("Can not get an inital context : " + e.getMessage());
180         }
181 
182         //get a new MimePartDataSource from our ENC envirnoment java:comp/env
183         MimePartDataSource mimePartDataSource = null;
184         try {
185             mimePartDataSource = (MimePartDataSource) ictx.lookup("java:comp/env/mail/MailMimePartDataSource");
186         } catch (NamingException e) {
187             throw new Exception("You have not configure the mail factory with the name specified"
188                     + " in the jonas-ejb-jar.xml file for java:comp/env/mail/MailMimePartDataSource ."
189                     + " By default, the factory's name is mailMimePartDS_1 :" + e.getMessage());
190         }
191 
192         //Get the message context
193         MessageContext messageContext = mimePartDataSource.getMessageContext();
194 
195         if (messageContext == null) {
196             throw new Exception("Can not get the message Context of the mimepartDatasource");
197         }
198 
199         //Get the message from the context
200         message = messageContext.getMessage();
201 
202         try {
203             message.setContent(content, "text/plain");
204         } catch (MessagingException e) {
205             throw new Exception("A failure occurs when setting content of the message :" + e.getMessage());
206         }
207     }
208 
209     /**
210      * Send the message which was previously configured.
211      * @throws Exception if a problem occurs.
212      * @throws RemoteException if the send failed.
213      */
214     public void send() throws Exception, RemoteException {
215 
216         if (message == null) {
217             throw new Exception("The message can not be send because the method setMessage() "
218                     + " was not called before the send() method.");
219         }
220 
221         try {
222             Transport.send(message);
223         } catch (MessagingException e) {
224             throw new Exception("The message can not be send : " + e.getMessage());
225         }
226     }
227 
228 }
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