Best way to get the multiple API calls response in Single request

Abhishek Chadha

Hi, I want to work with the multiple API requests and insert data to DB in a single API request in .net core and I want that these multiple calls work parallelly so what is the best approach doing this so

5 Replies

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Priyanka K S5y ago
Hi,

create async API and use await while calling other API's.

create a generic function to call all API's. You will get the c# code in PostMan you can use that.

then create a separate task for each api calls in Main Api:

var Task1 = await Task.Run(() => GenericMethod(parameters)); // API 1 url, its token and other parameters

var Task2 = await Task.Run(() => GenericMethod(parameters));// API 2 url, its token and other parameters

then call all API

Task.WaitAll(new [] {Task1, Task2});

Hope this helps.
Abhishek Chadha5y ago
Thanks, Mahesh sir for the response!

In the actual scenario there is no DB insertion, in my API call I need to call Another API's say 3-4, and then this 3-4 APIs response i need to send to azure blob storage.

so my concern is which is the better way to call these 4 APIs concurrently so that they process their work parallelly and there is no dependency on each other. I just want to save the processing time of my first API call
Mahesh Chand5y ago
What exactly is the problem when you call one API after another?
Both DB may not update at exact same time but you wont notice the difference. There may still be a difference in say micro or milli seconds. Each API response will be different. If methods are Async, it should not matter. They are almost parallel bc calls is going one after other, with no wait/delay. If you want to get real-time updates, the idea should be, to use an in-memory database that will update a single storage in one call and from there backend can do the trick to update separate databases. For most real-time situations, you prob want to add an in-memory DB in between the API and DB to get the real-time performance.
Abhishek Chadha5y ago
API methods are async already but how to call both methods simultaneously
Sachin Singh5y ago
Declare API methods as async tasks and then call them on another method, await will do the job here.