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| <section> |
| <h2><a name="Mailbox_listeners_configuration_overview"></a>Mailbox listeners configuration overview</h2> |
| |
| |
| <p> |
| Note: This feature requires Guice wiring. This is not implemented using Spring wiring.<br /> |
| Additionally, wiring not providing a mailbox support, like jpa-smtp, do not have support for |
| mailbox listeners configuration. |
| </p> |
| |
| |
| <p>Consult <a class="externalLink" href="https://github.com/apache/james-project/blob/master/server/apps/distributed-app/sample-configuration/listeners.xml">listeners.xml</a> |
| to get some examples and hints.</p> |
| |
| |
| <p>James Guice wiring allow the user to register potentially user defined additional mailbox listeners.</p> |
| |
| |
| <p>To do so, just register the class that needs to be instantiated and added to global listeners. These JAR can be |
| part of James source code, or provided as an extension and thus should be located in theextensions-jars folder.</p> |
| </section> |
| |
| <section> |
| <h2><a name="MailboxListener_configuration"></a>MailboxListener configuration</h2> |
| |
| <p> |
| The <executeGroupListeners> controls whether to launch group mailbox listener consumption. |
| Defaults to true. Use with caution: |
| never disable on standalone james servers, and ensure at least some instances do consume group mailbox listeners within a |
| clustered topology. |
| </p> |
| |
| <p> |
| Mailbox listener configuration is under the XML element <listener> |
| </p> |
| |
| <p> |
| Some MailboxListener allows you to specify if you want to run them synchronously or asynchronously. To do so, |
| for MailboxListener that supports this, you can use the <b>async</b> attribute (optional, per mailet default) to govern the execution mode. |
| If <b>true</b> the execution will be scheduled in a reactor elastic scheduler. If <b>false</b>, the execution is synchronous. |
| </p> |
| |
| |
| <ul> |
| Already provided additional listeners includes: |
| |
| |
| <li>org.apache.james.mailbox.spamassassin.SpamAssassinListener: |
| Provides per user real-time HAM/SPAM feedback to a SpamAssassin server depending on user actions. |
| Please note that a spamassassin.properties file is needed.<br /> |
| This mailet is asynchronous by default, but this behaviour can be overridden by the <b>async</b> |
| configuration property.</li> |
| |
| <li>org.apache.james.mailbox.cassandra.MailboxOperationLoggingListener: |
| For Cassandra guice wiring. Provides more insights on mailbox operations</li> |
| |
| <li>org.apache.james.mailbox.quota.mailing.listeners.QuotaThresholdCrossingListener: |
| For Cassandra guice wiring. Sends emails to users exceeding 80% and 99% of their quota to warn them</li> |
| </ul> |
| </section> |
| <section> |
| <h2><a name="PreDeletionHook_configuration"></a>PreDeletionHook configuration</h2> |
| |
| <p> |
| Before deleting a message in James, this message and some related information about the deletion will be passed to a set of PreDeletionHook instances, |
| This process is called notifying, and it acts sequentially. If the notifying process for all PreDeletionHooks finish successfully, then the message will be processed to be deleted. |
| Otherwise, that message won't be deleted. |
| </p> |
| |
| <p> |
| Pre Deletion Hook configuration is under the XML element <preDeletionHook> |
| </p> |
| |
| <ul> |
| Already provided additional pre deletion hooks includes: |
| |
| <li> |
| org.apache.james.vault.DeletedMessageVaultHook: |
| Storing messages about being deleted into org.apache.james.vault.DeletedMessageVault |
| </li> |
| </ul> |
| </section> |
| |
| <section> |
| <h2><a name="Add_custom_Guice_injections_for_extensions"></a>Add custom Guice injections for extensions</h2> |
| |
| <p>Upon injections, the user can reference additional guice modules, that are going to be used only upon extensions instantiation. |
| In order to do that:</p> |
| |
| <p> 1. Place the jar containing the guice module that should be used to instantiate your extensions within the /extensions-jars folder</p> |
| |
| <p> 2. Register your module fully qualified class name within <a class="externalLink" href="https://github.com/apache/james-project/blob/master/server/apps/distributed-app/sample-configuration/extensions.properties"> |
| extensions.properties</a> under the guice.extension.module key.</p> |
| </section> |
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