Provide a means to dispose a Message
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                 Key: MIME4J-72
                 URL: https://issues.apache.org/jira/browse/MIME4J-72
             Project: Mime4j
          Issue Type: Improvement
    Affects Versions: 0.5
            Reporter: Markus Wiederkehr


Currently an org.apache.james.mime4j.message.Message uses temporary files to 
store text and binary attachments of the message. Unfortunately a Message 
cannot be disposed of explicitly. Even when it eventually gets garbage 
collected the temp files continue to exist until the VM exits.

If the VM runs for a long time and a lot of e-mails get processed this can 
become a major problem.

For this reason I think that class Entity and interface Body should both have a 
method to dispose of the object. Multipart should dispatch a dispose-call to 
its list of body parts. A BodyPart should dispose of its body and concrete Body 
implementation such as TempFileTextBody should ultimately invoke delete() on 
the backing TempFile.

Last but not least SimpleTempStorage$SimpleTempFile should not silently ignore 
delete-calls.

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