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From "Damitha Kumarage (JIRA)" <>
Subject [jira] Resolved: (AXIS2C-1417) ability to add an MTOM sending callback without requiring a module
Date Wed, 07 Jul 2010 16:36:50 GMT


Damitha Kumarage resolved AXIS2C-1417.

    Fix Version/s: 1.7.0
       Resolution: Fixed

patch applied

> ability to add an MTOM sending callback without requiring a module
> ------------------------------------------------------------------
>                 Key: AXIS2C-1417
>                 URL:
>             Project: Axis2-C
>          Issue Type: New Feature
>          Components: mtom
>    Affects Versions: 1.6.0
>         Environment: $ gcc --version
> gcc (GCC) 4.2.2
> Copyright (C) 2007 Free Software Foundation, Inc.
> This is free software; see the source for copying conditions.  There is NO
> $ ld --version
> GNU ld version 20061020
> Copyright 2005 Free Software Foundation, Inc.
> This program is free software; you may redistribute it under the terms of
> the GNU General Public License.  This program has absolutely no warranty.
> $ uname -a
> Linux <hostname> 2.6.18-8.el5 #1 SMP Thu Mar 15 19:46:53 EDT 2007 x86_64 x86_64
x86_64 GNU/Linux
>            Reporter: Russell Tempero
>             Fix For: 1.7.0
>         Attachments: axis_changes.diff
>   Original Estimate: 72h
>  Remaining Estimate: 72h
> We wanted to be able to specify our own set of functions for reading file data which
is currently supported in Axis2 via sending callback modules. However, we did not want the
inefficiency associated with loading another dynamic library. Our solution was to alter the
Axis code to allow us to achieve the same functionality by only passing a few function pointers.
> Note that we also added support for using the callback handlers to send file attachments
as non-MTOM (base-64 encoded) data. See changes to data_handler.c.
> Some suggested further changes:
> - add a case to axiom_data_handler_read_from() for AXIOM_DATA_HANDLER_TYPE_CALLBACK that
works similarly to my addition for AXIOM_DATA_HANDLER_TYPE_HANDLER. This will allow traditional
call back handlers (those loaded via a module) can be used to send non-MTOM data.
> - alter axiom_data_handler_read_from() to work even if the "data_size" function is not
specified. My idea was to check if this function is not specified or if it returns some special
value (i.e. a negative number). If so, a much less efficient, brute-force method could be
employed to determine the size of the data. One way would be to iterate once through the data,
only counting the size and throwing away the actual data. Then create a buffer of the proper
size and iterate a second time through the data while filling the buffer.
> Hopefully this patch is useful.
> Thanks,
> Russell

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