Stream: dotnet
Topic: Performing a batch request
Dimitar (Dec 09 2017 at 19:17):
Hello,
How is it possible for me to build a batch request in the .NET FHIR API?
Yunwei Wang (Dec 09 2017 at 20:00):
var bundle = new Bundle() { Type = Bundle.BundleType.Batch };
Dimitar (Dec 09 2017 at 20:08):
@Yunwei Wang Thank you, can the TransactionBuilder be used as well in that case or?
Yunwei Wang (Dec 09 2017 at 20:16):
A Bundle can be either batch or transaction. If you need transaction, use TransactionBuider.
Dimitar (Dec 09 2017 at 20:21):
Then why is there a parameter in transaction builder that accepts the type of bundle to be returned:
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Yunwei Wang (Dec 09 2017 at 20:25):
Interesting. That means TransactionBuilder can be used to build batch bundle. I always use Bundle itself for batch request. Anyway, now I think the difference is like String vs StringBuilder. Just pick one you are comfortable with.
Dimitar (Dec 09 2017 at 20:48):
@Yunwei Wang Alright, thank you for the clarification, I will consider your aproach aswell, it's good to know that both work. You are right, it's very similar to the StringBuilder.
Dimitar (Dec 10 2017 at 00:23):
I am facing one problem however, whenever I build all of my get request, with the TransactionBuilder and execute the transaction of batches, it doesn't do the GET requests, when I tried the URLs they work just fine, am I doing something wrong or?
Brian Postlethwaite (Dec 10 2017 at 00:49):
code snippit would be useful.
When I'm developing I often run fiddler in the background so that I can examine and understand what is going over the wire.
With a Batch operation, there is only a single call, which is the POST of the bundle to the endpoint. All of the interactions inside the bundle are executed on the server, and the results are found in the returned bundle.
Hope that helps.
Dimitar (Dec 10 2017 at 01:02):
@Brian Postlethwaite Basically, what I am doing, is the following, I add string GET requests, to a list. After I add them to the list, I build a transaction, based on each GET request, which was built using those strings, the following way:
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And after that is done, I execute a transaction, which is supposed to post that batch, with the get requests.
Dimitar (Dec 10 2017 at 01:15):
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Those are the get requests
I get a 404 Error Unknown resource type 'http:'
Brian Postlethwaite (Dec 10 2017 at 01:37):
That does look strange, not sure what {lastN} is, it looks like its going to mess with the Resource name, should that be on the left of the "?"
Dimitar (Dec 10 2017 at 01:46):
In my case lastn is empty string, because hapi server, doesn't support the lastn operation http://hl7.org/fhir/STU3/observation-operations.html#lastn
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Brian Postlethwaite (Dec 10 2017 at 03:00):
You have uri.Unescape, I think you meant to have Uri.EscapeString
Dimitar (Dec 10 2017 at 13:07):
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Dimitar (Dec 10 2017 at 13:13):
@Brian Postlethwaite it's very strange, because when I look into the transaction builder, where the for one of the element URl is, for example "http://fhirtest.uhn.ca/baseDstu3/Observation?patient=Patient/330828&code=http://loinc.org|8302-2,http://loinc.org|8306-3,http://loinc.org|8308-9&date=ge2013-11-12T00:00:00", executes just fine in postman, however it gives that error when its sent as a transaction.
Dimitar (Dec 10 2017 at 13:37):
(deleted)
Dimitar (Dec 10 2017 at 14:19):
Ok I found out what he problem is, basically in the request URL of each entry in the Bundle, it starts with the Server URI, which was the parameter of the transaction bundle, and whenever I would execute the Transaction, it would execute the get Request like so: [baseUrl]/[baseUrl]/Observation?patient=Patient etc..
Dimitar (Dec 10 2017 at 14:22):
@Yunwei Wang So Yunwei, I think your approach is the way to go :)
Last updated: Apr 12 2022 at 19:14 UTC
