Can also look at org.apache.mina.filter.codec.serialization package.
I haven't used it, but seems like a good fit for Object Serialization needs.
thanks
ashish
On Wed, Jul 28, 2010 at 1:13 PM, Emmanuel Lecharny <elecha...@gmail.com> wrote:
> On 7/28/10 4:58 AM, amit shah wrote:
>>
>> Hello,
>
> Hi,
>
>> I understand that mina provides a framework to allow the client,
>> server communicate through java objects by using the protocol codec
>> factory,
>> encoder& decoder.
>> Since the IoBuffer provides methods to get primitive objects like int,
>> string, double etc, how can we pass java collection objects like map. For
>> e.g. below is my pojo class which has to be encoded& decoded.
>>
>> class MyClass {
>> private String name;
>> private Map<String, Integer> nameVsIdMap;
>> private Map<String, List<Integer>> nameVsNumbers;
>>
>> .....
>> }
>>
>> Any help would be appreciated.
>
> You have to write yur own encoder/decoder to handle those objects.It's not
> that complicated, you can follow
> http://mina.apache.org/tutorial-on-protocolcodecfilter-for-mina-2x.html to
> get a clue about how to do that.
>
> Basically, the decoder will receive IoBuffer, and you will create Objects
> out of that, and symetrically, the encoder will take Objects and produce an
> Iobuffer.
>
> There are a few tricks you have to be aware of for the decoder :
> - messages can be fragmented : you may not receive all the needed bytes to
> generate a full object, so you have to deal with that. You can pass the
> serialized object's size before the serialized object itself in orer to deal
> with this issue. Note that even this size can be fragmented. Store any
> temporary data into the session attributes until you have got what you need
> to produce an object, then when done, call the next filter.
> - you may have more than one object in the received IoBuffer, so don't
> forget to iterate on the buffer until it's empty.
>
> Hope it helps.
>
>
> --
> Regards,
> Cordialement,
> Emmanuel Lécharny
> www.iktek.com
>
>
--
thanks
ashish
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