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Docs: Deprecating packages_api and removing it from our pipelines (#54473)

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Timur Olzhabayev
2022-09-01 18:15:44 +02:00
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6
contribute/architecture/frontend-data-requests.md
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# Data requests
[BackendSrv](https://grafana.com/docs/grafana/latest/packages_api/runtime/backendsrv) handles all outgoing HTTP requests from Grafana. This document explains the high-level concepts used by `BackendSrv`.
[BackendSrv](https://github.com/grafana/grafana/blob/main/packages/grafana-runtime/src/services/backendSrv.ts) handles all outgoing HTTP requests from Grafana. This document explains the high-level concepts used by `BackendSrv`.
## Canceling requests
@@ -14,7 +14,7 @@ Grafana uses a concept called _request cancellation_ to cancel any ongoing reque
#### Before Grafana 7.2
Before Grafana can cancel any data request, it has to identify that request. Grafana identifies a request using the property `requestId` [passed as options](https://github.com/grafana/grafana/blob/main/docs/sources/packages_api/runtime/backendsrvrequest.md) when you use [BackendSrv](https://grafana.com/docs/grafana/latest/packages_api/runtime/backendsrv).
Before Grafana can cancel any data request, it has to identify that request. Grafana identifies a request using the property `requestId` [passed as options](https://github.com/grafana/grafana/blob/main/packages/grafana-runtime/src/services/backendSrv.ts#L47) when you use [BackendSrv](https://github.com/grafana/grafana/blob/main/packages/grafana-runtime/src/services/backendSrv.ts).
The cancellation logic is as follows:
@@ -23,7 +23,7 @@ The cancellation logic is as follows:
#### After Grafana 7.2
Grafana 7.2 introduced an additional way of canceling requests using [RxJs](https://github.com/ReactiveX/rxjs). To support the new cancellation functionality, the data source needs to use the new `fetch` function in [BackendSrv](https://grafana.com/docs/grafana/latest/packages_api/runtime/backendsrv).
Grafana 7.2 introduced an additional way of canceling requests using [RxJs](https://github.com/ReactiveX/rxjs). To support the new cancellation functionality, the data source needs to use the new `fetch` function in [BackendSrv](https://github.com/grafana/grafana/blob/main/packages/grafana-runtime/src/services/backendSrv.ts).
Migrating the core data sources to the new `fetch` function [is an ongoing process that you can read about in this issue.](https://github.com/grafana/grafana/issues/27222)