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From "Emmanuel Lecharny (JIRA)" <j...@apache.org>
Subject [jira] Commented: (DIRMINA-655) Add a more general purpose text based decoder
Date Wed, 07 Jan 2009 00:05:44 GMT

    [ https://issues.apache.org/jira/browse/DIRMINA-655?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12661385#action_12661385
] 

Emmanuel Lecharny commented on DIRMINA-655:
-------------------------------------------

Thinking a bit more about the proposal :

As you know, you have no guarantee that a terminated message will be transmitted in one single
block. What if the received bytes just get decoded and the regexp is partially matched ? 

For instance using the LINE_TERM regexp, what if we receive \r\n in two messages ? I guess
that you will match LINE_TERM twice, and potentially consider that you have two lines to deal
with, when it's just an artefact, as the sender really wanted to terminate its message with
a '\r\n'

This is where it gets tricky ...

> Add a more general purpose text based decoder
> ---------------------------------------------
>
>                 Key: DIRMINA-655
>                 URL: https://issues.apache.org/jira/browse/DIRMINA-655
>             Project: MINA
>          Issue Type: New Feature
>    Affects Versions: 2.0.0-M4
>         Environment: Mina 2.0.0-M4, Java 1.6, Fedora 10
>            Reporter: Matthieu Chase Heimer
>            Priority: Minor
>         Attachments: RegExDecoder.java
>
>
> There are many text based protocols who have messages that are terminated by a delimiter
other than an end of line. A protocol decoder that is more generic than TextLineDecoder would
be a nice addition. It should also be easy to extend so developers can focus on coverting
text messages to domain objects and not on converting  and parsing IoBuffers.

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