Details
Minor Description
When recently working with the mailjdbc system test org.apache.derbyTesting.system.mailjdbc on DERBY-4152 I noticed some potential improvements that might be good for the test. We should probably hold off on these improvements however until the root cause of DERBY-4152 is established, however, so we don't muddy the waters with that issue by changing the test.
1) DbTasks.moveToFolders may throw an IllegalArgumentException.
There is a line: message_id = Rn.nextInt(count - 1);
if count is 1 the argument to nextInt() might be 0 which is not allowed. I hit this once but lost the stack trace, but it is apparent that when there is only one row in the table this can occur.
2) Allow/implement multiple attachments per message and cleanup DbTasks.insertMail() logic.
- Remove the attach_id column from INBOX to allow multiple attachments.
-Make the attachment insert part of the message for loop in insertMail.
Use getGeneratedKeys() to get the id of the inserted message.
When attachments are inserted, insert (1-4) attachments and give them a corresponding attach_id from 1-4.
This will allow for removal of the select statements used to determine id and attach_id. I'll file another issue for these improvements if folks agree that they are sensible.
A detailed description of the current implementation of insertMail is described at https://issues.apache.org/jira/secure/attachment/12405685/insertMailSummary.txt
3) DbTasks.databaseSize calculation is wrong. It doesn't match du -sk. The method does not recurse into subdirectories and includes the length() on directory files which is undefined accourding to the file.length() javadoc.