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| HTTP async request |
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| tekt9 |
 Posted: Fri Feb 27, 2015 5:26 am Post subject: HTTP async request |
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Novice
Joined: 13 Aug 2012
Posts: 15
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Hi...
scenario: I'm querying a web-service for address information. The query is created in the back-end. I wish to solve the issue using async HTTP request and response node, due to each request might use 1-3 sec and I expect small bursts(5-10 simultaneous requests) from time to time. As each query is unique, I need to have some sort of correlation between the message from the back-end and the HTTP request.
Problem: When I use the async HTTP node, all identification regarding the message is lost when i receive the HTTP response. When the HTTP request has been sent, non of the assemblies have any IDs that I can use to match request and response.
Have any of you, experience with this issue or could you refer me to an article of some sort it would be greatly appreciated 
best regards
Tharani |
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| fjb_saper |
| Posted: Fri Feb 27, 2015 5:30 am Post subject: Re: HTTP async request |
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Grand High Poobah
Joined: 18 Nov 2003
Posts: 20768
Location: LI,NY
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| tekt9 wrote: |
Hi...
scenario: I'm querying a web-service for address information. The query is created in the back-end. I wish to solve the issue using async HTTP request and response node, due to each request might use 1-3 sec and I expect small bursts(5-10 simultaneous requests) from time to time. As each query is unique, I need to have some sort of correlation between the message from the back-end and the HTTP request.
Problem: When I use the async HTTP node, all identification regarding the message is lost when i receive the HTTP response. When the HTTP request has been sent, non of the assemblies have any IDs that I can use to match request and response.
Have any of you, experience with this issue or could you refer me to an article of some sort it would be greatly appreciated
best regards
Tharani |
I expect you have looked at the asynchronous samples, and your problem is not covered by them...
You'd need to pass the id into the message to the back end and have it returned to you.... 
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| mgk |
| Posted: Fri Feb 27, 2015 6:20 pm Post subject: |
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Padawan
Joined: 31 Jul 2003
Posts: 1647
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You can pass information to the back end, but you can also set the UserContext field before the request, and have that data turn up with the response message (it is passed been the nodes, not via the back end).
See the HTTPAsyncRequest node docs for more info. An example would be:
| Code: |
| SET OutputLocalEnvironment.Destination.HTTP.UserContext = x'aabbccddeeff11223344556677889900'; |
Kind regards,
_________________
MGK
The postings I make on this site are my own and don't necessarily represent IBM's positions, strategies or opinions. |
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| tekt9 |
| Posted: Tue Mar 03, 2015 12:20 am Post subject: Thanks... that did the trick |
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Novice
Joined: 13 Aug 2012
Posts: 15
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Hello
Thanks for the replies fjb_saper and mgk
The usercontext did the trick. It is not covered by the samples, and I was expecting writtendestination to hold the necessary data.
best regards Tharani |
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