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| |
| <div class="section"> |
| <h2>Custom SMTP Hooks Implementations<a name="Custom_SMTP_Hooks_Implementations"></a></h2> |
| |
| |
| <div class="section"> |
| <h3>Why a Custom SMTP Hook<a name="Why_a_Custom_SMTP_Hook"></a></h3> |
| |
| |
| <p>What to do if the Hook API is not enough for you ? You want for example |
| to write a code which handles a new command like "YOURCOOLCOMMAND: whatever@example".</p> |
| |
| |
| <p>For this kind of needs you should implement the CommandHandler interface. |
| This gives you a lower-level API to handle this kind of tasks. If you want |
| to support a custom Hook in your <tt>CommandHandler</tt> its the best |
| to just extend <tt>AbstractHookableCmdHandler</tt>.</p> |
| |
| </div> |
| |
| |
| <div class="section"> |
| <h3>Things to Remember <a name="Things_to_Remember"></a></h3> |
| |
| |
| <p>Be aware that your implementation needs to be thread-safe as it will get used as singleton. |
| If you need to store temporary informations within the SMTP Transaction/Session you should |
| use the <tt>SMTPSession.getState().put(...)</tt> |
| and <tt>SMTPSession.getConnectionState().put(...)</tt> methods.</p> |
| |
| |
| <p>For a more explanation see the <a class="externalLink" href="http://james.apache.org/protocols/apidocs/index.html">apidocs</a> |
| for the protocols library which is used by James SMTP Server.</p> |
| |
| </div> |
| |
| |
| <div class="section"> |
| <h3>Get your Hook implementations loaded<a name="Get_your_Hook_implementations_loaded"></a></h3> |
| |
| |
| <p>Just create a jar file which contains your code and put it in /path/to/james/conf/lib/ |
| folder. The jar will get picked up by the ClassLoader automatic then.</p> |
| |
| |
| <p>After that open the smtpserver.xml file and add your hook to the <tt><handlers></handlers></tt> block in the order you |
| want to have it executed. So if you have 2 MailHook implementation make sure the first one |
| which is listed in smtpserver.xml is the one you want to call first.</p> |
| |
| </div> |
| |
| |
| <div class="section"> |
| <h3>Return-Codes<a name="Return-Codes"></a></h3> |
| |
| |
| <p>Each of the Hooks need to return a HookResult to tell the SMTPServer |
| if the next registered Hook should get called or not.</p> |
| |
| |
| <p>For this the HookReturnCode is used.</p> |
| |
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