Ashish-24 wrote:
>
> Your approach is perfectly fine. There is one thing that you need to
> change at the client side.
> You need to implement the Observer or Listener pattern. Each of your
> message need to be uniquely identified.
> When a message is sent, the client thread shall become observer and
> wait till a message arrives. Ones the message arrives
> the listener should pick up the packet, identify the listener and call
> a callback method.
>
> You can choose any any data structure/strategy for this.
>
> Summarizing
> 1. Have a unique identifier for your messages
> 2. Add sender into Observer list with unique id
> 3. Server should return the unique id back
> 4. Once the response is received, based on the unique id, call a
> callback method on Observer
>
> Alternatively, you can create an abstraction that Client thread
> doesn't use network directly. Build a network handler and let it do
> all this stuff. Client
>
> This kind of implementation is fairly common in Network Manager.
> Checkout AdventNet or SNMP4J code samples.
>
> - ashish
>
> Thanks, Ashish! This is very helpful.
> On Wed, Nov 5, 2008 at 3:22 AM, Yong Yuan <[EMAIL PROTECTED]> wrote:
>> Hi,
>>
>> I'm building a UDP server that handles each incoming request in a
>> separate
>> thread. The problem is, a UDP client may send out multiple requests
>> concurrently by using multiple threads. Each thread on the client will
>> wait
>> for responses from the server. Since UDP is connectionless, a client
>> thread
>> may receive a mismatching datagram. In this case, does MINA have any
>> built-in mechanism that helps a client thread to get the matching
>> response?
>> If not, I guess we can build a queue that dispatches responses to
>> appropriate client threads. However, what if I need to run multiple
>> clients
>> in different JVMs on the same client machine, and each client will make
>> requests to the same server? Is there any good way of handling such
>> scenario, or we should really use TCP in this case?
>>
>> Thanks,
>>
>
>
>
> --
> thanks
> ashish
>
> Blog: http://www.ashishpaliwal.com/blog
>
> My Photo Galleries: http://www.pbase.com/ashishpaliwal
>
>
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