[jira] Commented: (JAMES-808) Fetch command is not very efficient

["Robert Burrell Donkin (JIRA)" <se...@james.apache.org>]

    [ https://issues.apache.org/jira/browse/JAMES-808?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12538030 ] 

Robert Burrell Donkin commented on JAMES-808:
---------------------------------------------

Patch has some similarity to work on my local force. I agree in general with this approach but let's take discussion of these issues onto the mailing lists.

> Fetch command is not very efficient
> -----------------------------------
>
>                 Key: JAMES-808
>                 URL: https://issues.apache.org/jira/browse/JAMES-808
>             Project: James
>          Issue Type: Improvement
>          Components: IMAPServer
>    Affects Versions: Trunk
>            Reporter: Zsombor Gegesy
>            Assignee: Robert Burrell Donkin
>             Fix For: Trunk
>
>         Attachments: opt.patch
>
>
> Currently the implementation of the FETCH command is not very efficient. For example to retrieve one mail the following conversions will happens:
>  1, the backend creates a MimeMessage from a file/database blob/thin air/etc
>  2, the frontend converts into a byte array, with correct CRLF line endings. (I don't get, why it's needed, every incoming MimeMessage is already in this format, isn't it ?)
>  3, the frontend appends it into a StringBuffer in the FetchCommand class
>  4, after some String manipulation it gets sent over an InternetPrintWriter which checks also that all line endings in correct style.
>  I'm not sure that the whole thing is absolutly necessary. There is two other problem with the current code : 
>  1, it doesn't calculate the correct MessageResult flags, so the backend cant optimize out the unnecessary things.
>  2,  It doesn't parse the BODY[]<0.1024> style commands. 

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