Author: rdonkin
Date: Wed Dec 3 01:28:54 2008
New Revision: 722820
URL: http://svn.apache.org/viewvc?rev=722820&view=rev
Log:
Some notes about spool management
Modified:
james/server/trunk/spoolmanager-function/src/main/java/org/apache/james/James.java
Modified:
james/server/trunk/spoolmanager-function/src/main/java/org/apache/james/James.java
URL:
http://svn.apache.org/viewvc/james/server/trunk/spoolmanager-function/src/main/java/org/apache/james/James.java?rev=722820&r1=722819&r2=722820&view=diff
==============================================================================
---
james/server/trunk/spoolmanager-function/src/main/java/org/apache/james/James.java
(original)
+++
james/server/trunk/spoolmanager-function/src/main/java/org/apache/james/James.java
Wed Dec 3 01:28:54 2008
@@ -621,6 +621,29 @@
}
/**
+ * <p>Note that this method ensures that James cannot be run in a
distributed
+ * fashion.</p>
+ * <p>Two instances may return the same ID.
+ * There are various ways that this could be fixed.
+ * The most obvious would be to add a unique prefix.
+ * The best approach would be for each instance to be configured
+ * with a name which would then be combined with the network
+ * address (for example, [EMAIL PROTECTED]) to create a
+ * unique James instance identifier.
+ * </p><p>
+ * Alternatively, using a data store backed identifier (for example, from
a sequence
+ * when DB backed) should be enough to gaurantee uniqueness. This would
imply
+ * that the Mail interface or the spool store should be responsible for
creating
+ * new Mail implementations with ID preassigned.
+ * </p><p>
+ * It would be useful for each
+ * James cluster to have a unique name. Perhaps a random number could be
generated by
+ * the spool store upon first initialisation.
+ * </p><p>
+ * This ID is most likely
+ * to be used as message ID so this is probably useful in any case.
+ * </p>
+ *
* @see org.apache.james.services.MailServer#getId()
*/
public String getId() {
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