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From Damitha Kumarage <damith...@gmail.com>
Subject Re: AW: AW: [Axis2C] how to return a MsgBox
Date Wed, 30 Jan 2008 05:16:39 GMT
Senaka Fernando wrote:

>Hi all,
>
>I believe you are requesting support for session on Axis2/C? So that you
>can have a conversation between Client and Server. Am I missing something
>here? AFAIK, Bill spoke on implementing Session with CURL.
>
>Or else is this possible through Savan/C (WS-Eventing)?
>
>Regards,
>Senaka
>
>  
>
>>Hello Josef,
>>
>>i've read your first post, opened a reply - starting to
>>write my thoughts down - deleted it, cause im not an expert ;-)
>>
>>first, i think you have to write your server side callback method
>>outside the service, cause the service is only active when triggerd.
>>you can use axis2 api to create payload - clear.
>>
>>second, if i am right, not alle mep's from wsdl are supported.
>>i think you want to have "Solicit-response"/"out-in".
>>
>>i do not know corba very well, but i think your former corba server
>>could send the message to the client, cause the client is registerd
>>and will be found over orb/naming service !? the client seems to be
>>permanetly connected / has a listening port !?
>>
>>
>>possible solutions i can imagine for axis2 :
>>
>>1. the client has to ask from time to time if something has happend
>>on serverside. if nothing has happend on serverside, server didn't
>>send back anythink or just a message like "no thanks, ask again".
>>otherwise the server replys with your yes/no question, client has to
>>answer.
>>but i think this is not what you want, if you talk about a
>>server side callback.
>>
>>2. when starting your client, you call a "registerWithServer" method,
>>to let the server know the clients endpoint, using the servers context,
>>maybe at application level ?
>>write a service (not an axis service) that has a callback. when your
>>conditions are met, query the context and send the question.
>>now you have the problem, that the client is not listening - you have
>>to run a axis service on clientside :-(
>>    
>>
You can use Apache Savan/C [1] to do just that. Your service need to be 
Savan enabled and you can subscribe to that service providing a url for 
listening from the service. This url could be another axis2 service or a 
callback.

thanks
Damitha

[1]http://ws.apache.org/savan/c/

>>3. client sends an async message to you server, server saves all
>>informations in context to answer and quits without reply.
>>i do no know what will happen ;-) maybe you have to increase client-side
>>timeout ?
>>write non axis service and your callback, when conditions are met, query
>>the context and create payload, then answer the initial async question.
>>
>>
>>cause i do not know if it is important to answer the question yes/no
>>immediately, when conditions are met - maybee this is also possible :
>>
>>4. write a non axis service, when condition is met, write a flag to the
>>context. when client tries to communicate (you know the user is active),
>>query the context for the flag, send an special-fault as
>>answer. axis-client has to interpret this fault as yes/no question,
>>send the answer and service can do its work, reseting the flag in
>>context. after this, the user as to resend the initial message again.
>>
>>
>>mh, i don't really have an answer for you, just some thoughts and to let
>>you know that you are not alone with webservice paradigm and its
>>problems ;-)
>>
>>mfg derMark
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>Stadelmann Josef schrieb:
>>    
>>
>>>Hi Dinesh
>>>
>>>	What relates to Axis2C and what not, how can a novice like I
>>>	know that in FULL. i.e. possible Callbacks to caling clients
>>>	without posting the service thread, but making it wait for the
>>>	answer to occure. i.e. Agent paradigm.
>>>
>>>	I am just seeking for an elegant method to invoke from within
>>>	an Axis2/C server/service something like a callback to the client
>>>	which askes Windows for a Windows MSGBOX with YES NO Buttons and
>>>	a msg and a title.
>>>
>>>	When the user then clicks a button, the answer is transfered
>>>	to the waiting server/service and the service will evaluate
>>>	the asnwer and can then continue.
>>>
>>>
>>>	I am seeking an elegant way, one of you migth know, such as how
>>>	to call back or agree on a clall back routin in the originating
>>>	Axis2/C client
>>>
>>>	If nobody knows that at your side of the pond, well, then I have
>>>	to do it the hard way by miyelf.
>>>
>>>	I generate a client side stub which is invoked by a server/service
>>>	which sends to any server/service a message
>>>	a title, a cpation, and some buttons or at least ID's to it.
>>>
>>>	The receiving service, in this case on a windows system, will then
>>>	invoke a Windows Operating System call and ask for a MsgBox.
>>>
>>>	Once the button is clicked the resulting button value
>>>	is then returedn as an integer to the client, which is in this
>>>	case the invoked web service.
>>>
>>>	I did so in the past using a corba server on a windows system
>>>
>>>	Now all what changes is CORBA to WebServices
>>>
>>>	And the paradigm is CLIENT -> AGENT -> question to MSG-BOX-SERVER
>>>	and back.
>>>
>>>	where Client is a web service client on a PC
>>>
>>>	the Agent is the axis2/c webservice server which needs to ask back
>>>
>>>	the Server is service hosted on the same PC as the Client resides.
>>>
>>>	The bas thing is that I need on each PC a web service/server for that,
>>>
>>>Josef,
>>>
>>>
>>>
>>>
>>>
>>>-----Urspr√ľngliche Nachricht-----
>>>Von: Dinesh Premalal [mailto:premalal@gmail.com]Im Auftrag von Dinesh
>>>Premalal
>>>Gesendet: Dienstag, 29. Januar 2008 10:00
>>>An: axis-c-user@ws.apache.org
>>>Betreff: Re: AW: [Axis2C] how to return a MsgBox
>>>
>>>
>>>Hi Josef,
>>>
>>>   I'm not sure how this question relates to Axis2/C? or I didn't
>>>   understand it well. If you could be more specific on your question
>>>   I guess you could get some more thoughts.
>>>
>>>thanks,
>>>Dinesh
>>>
>>>
>>>      
>>>
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>>
>>    
>>
>
>
>
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>  
>


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