I have a requirement where 

1. I receive a JSON request from Front end and I am sending as GET Query params to first backend, Here I am using dp-open url and calling the backend.
2. From the First backend I receive tokens, Consider if I receive ten tokens then I have to call second backend ten times parallelly  with xml post body  

I am able to call first backend and get tokens and then I am forming xml but can you please let me know how to post xml body in parallel call?

When you say parallel, do you mean asynchronous, 10 times, to the second back end?

I have a requirement where 

1. I receive a JSON request from Front end and I am sending as GET Query params to first backend, Here I am using dp-open url and calling the backend.
2. From the First backend I receive tokens, Consider if I receive ten tokens then I have to call second backend ten times parallelly  with xml post body  

I am able to call first backend and get tokens and then I am forming xml but can you please let me know how to post xml body in parallel call?

When you say parallel, do you mean asynchronous, 10 times, to the second back end?

I have a requirement where 

1. I receive a JSON request from Front end and I am sending as GET Query params to first backend, Here I am using dp-open url and calling the backend.
2. From the First backend I receive tokens, Consider if I receive ten tokens then I have to call second backend ten times parallelly  with xml post body  

I am able to call first backend and get tokens and then I am forming xml but can you please let me know how to post xml body in parallel call?

When you say parallel, do you mean asynchronous, 10 times, to the second back end?

I have a requirement where 

1. I receive a JSON request from Front end and I am sending as GET Query params to first backend, Here I am using dp-open url and calling the backend.
2. From the First backend I receive tokens, Consider if I receive ten tokens then I have to call second backend ten times parallelly  with xml post body  

I am able to call first backend and get tokens and then I am forming xml but can you please let me know how to post xml body in parallel call?

Yes, Asynchronous.

------------------------------
Sagar Muktha

Original Message:
Sent: Wed July 12, 2023 02:24 PM
From: Joseph Morgan
Subject: Datapower Post XML Parallel calls

When you say parallel, do you mean asynchronous, 10 times, to the second back end?

------------------------------
Joseph Morgan

Original Message:
Sent: Wed July 12, 2023 11:07 AM
From: Sagar Muktha
Subject: Datapower Post XML Parallel calls

I have a requirement where 

1. I receive a JSON request from Front end and I am sending as GET Query params to first backend, Here I am using dp-open url and calling the backend.
2. From the First backend I receive tokens, Consider if I receive ten tokens then I have to call second backend ten times parallelly  with xml post body  

I am able to call first backend and get tokens and then I am forming xml but can you please let me know how to post xml body in parallel call?

------------------------------
Sagar Muktha
------------------------------

Yes, Asynchronous.

When you say parallel, do you mean asynchronous, 10 times, to the second back end?

I have a requirement where 

1. I receive a JSON request from Front end and I am sending as GET Query params to first backend, Here I am using dp-open url and calling the backend.
2. From the First backend I receive tokens, Consider if I receive ten tokens then I have to call second backend ten times parallelly  with xml post body  

I am able to call first backend and get tokens and then I am forming xml but can you please let me know how to post xml body in parallel call?

As Hermann mentioned, you're not going to be able to do it in raw XSLT.   There is a way in GatewayScript via looping, which is functionally more straigtforward, but you have to be careful, especially if you must capture each response from the asynchronous calls from the loop.  

It sounds like you may be sending the JSON request via XML dp:url-open in the original call.  Since you are receiving JSON, it is likely much better to process the original request with GatewayScript so when the response with tokens comes, you can more easily loop through it to call the 2nd back end.   If you need the responses from each of the back end token calls, however, it gets a little more tricky in GatewayScript.

However, if you must stick with using XSLT via a transform, you can output the response from the transform action, and then use the for-each action, invoking what you need (say a Results action) to the back end for each token. This can then be "wrapped" with an event sync action to handle the various responses.

It really is just a matter of how your policy is currently configured, if you have full control over changing it, and what you know about using the various built-in actions vs writing code.

Yes, Asynchronous.

When you say parallel, do you mean asynchronous, 10 times, to the second back end?

I have a requirement where 

1. I receive a JSON request from Front end and I am sending as GET Query params to first backend, Here I am using dp-open url and calling the backend.
2. From the First backend I receive tokens, Consider if I receive ten tokens then I have to call second backend ten times parallelly  with xml post body  

I am able to call first backend and get tokens and then I am forming xml but can you please let me know how to post xml body in parallel call?

I am able to do parallel calls dynamically with XSLT and event sync action(If I receive twenty tokens from FirstBackend then I am able to call twenty times second back end parallely with post body/XML). When I am triggering more than twenty times to the second back end parallely I am receiving Java socket time out exception or 504 error code.

Can you please let me know if there is any limitation to do parallel calls in data power?

As Hermann mentioned, you're not going to be able to do it in raw XSLT.   There is a way in GatewayScript via looping, which is functionally more straigtforward, but you have to be careful, especially if you must capture each response from the asynchronous calls from the loop.  

It sounds like you may be sending the JSON request via XML dp:url-open in the original call.  Since you are receiving JSON, it is likely much better to process the original request with GatewayScript so when the response with tokens comes, you can more easily loop through it to call the 2nd back end.   If you need the responses from each of the back end token calls, however, it gets a little more tricky in GatewayScript.

However, if you must stick with using XSLT via a transform, you can output the response from the transform action, and then use the for-each action, invoking what you need (say a Results action) to the back end for each token. This can then be "wrapped" with an event sync action to handle the various responses.

It really is just a matter of how your policy is currently configured, if you have full control over changing it, and what you know about using the various built-in actions vs writing code.

Yes, Asynchronous.

When you say parallel, do you mean asynchronous, 10 times, to the second back end?

I have a requirement where 

1. I receive a JSON request from Front end and I am sending as GET Query params to first backend, Here I am using dp-open url and calling the backend.
2. From the First backend I receive tokens, Consider if I receive ten tokens then I have to call second backend ten times parallelly  with xml post body  

I am able to call first backend and get tokens and then I am forming xml but can you please let me know how to post xml body in parallel call?

I am able to do parallel calls dynamically with XSLT and event sync action(If I receive twenty tokens from FirstBackend then I am able to call twenty times second back end parallely with post body/XML). When I am triggering more than twenty times to the second back end parallely I am receiving Java socket time out exception or 504 error code.

Can you please let me know if there is any limitation to do parallel calls in data power?

As Hermann mentioned, you're not going to be able to do it in raw XSLT.   There is a way in GatewayScript via looping, which is functionally more straigtforward, but you have to be careful, especially if you must capture each response from the asynchronous calls from the loop.  

It sounds like you may be sending the JSON request via XML dp:url-open in the original call.  Since you are receiving JSON, it is likely much better to process the original request with GatewayScript so when the response with tokens comes, you can more easily loop through it to call the 2nd back end.   If you need the responses from each of the back end token calls, however, it gets a little more tricky in GatewayScript.

However, if you must stick with using XSLT via a transform, you can output the response from the transform action, and then use the for-each action, invoking what you need (say a Results action) to the back end for each token. This can then be "wrapped" with an event sync action to handle the various responses.

It really is just a matter of how your policy is currently configured, if you have full control over changing it, and what you know about using the various built-in actions vs writing code.

Yes, Asynchronous.

When you say parallel, do you mean asynchronous, 10 times, to the second back end?

I have a requirement where 

1. I receive a JSON request from Front end and I am sending as GET Query params to first backend, Here I am using dp-open url and calling the backend.
2. From the First backend I receive tokens, Consider if I receive ten tokens then I have to call second backend ten times parallelly  with xml post body  

I am able to call first backend and get tokens and then I am forming xml but can you please let me know how to post xml body in parallel call?