Commits on Jan 11, 2022

1. feat(gateway): Implement new supergraphSdl() config option for dyna… …

   …mic gateway updates (#1246)
   
   (copied from the changelog entry)
   
   This change improves the `supergraphSdl` configuration option to provide a clean and flexible interface for updating gateway schema on load and at runtime. This PR brings a number of updates and deprecations to the gateway. Previous options for loading the gateway's supergraph (`serviceList`, `localServiceList`, `experimental_updateServiceDefinitions`, `experimental_supergraphSdl`) are all deprecated going forward. The migration paths all point to the updated `supergraphSdl` configuration option.
   
   The most notable change here is the introduction of the concept of a `SupergraphManager` (one new possible type of `supergraphSdl`). This interface (when implemented) provides a means for userland code to update the gateway supergraph dynamically, perform subgraph healthchecks, and access subgraph datasources. All of the mentioned deprecated configurations now either use an implementation of a `SupergraphManager` internally or export one to be configured by the user (`IntrospectAndCompose` and `LocalCompose`).
   
   For now: all of the mentioned deprecated configurations will still continue to work as expected. Their usage will come with deprecation warnings advising a switch to `supergraphSdl`.
   * `serviceList` users should switch to the now-exported `IntrospectAndCompose` class.
   * `localServiceList` users should switch to the similar `LocalCompose` class.
   * `experimental_{updateServiceDefinitions|supergraphSdl}` users should migrate their implementation to a custom `SupergraphSdlHook` or `SupergraphManager`.
   
   Since the gateway itself is no longer responsible for composition:
   * `experimental_didUpdateComposition` has been renamed more appropriately to `experimental_didUpdateSupergraph` (no signature change)
   * `experimental_compositionDidFail` hook is removed
   
   `experimental_pollInterval` is deprecated and will issue a warning. Its renamed equivalent is `pollIntervalInMs`.
   
   Some defensive code around gateway shutdown has been removed which was only relevant to users who are running the gateway within `ApolloServer` before v2.18. If you are still running one of these versions, server shutdown may not happen as smoothly.

   

   trevor-scheer committed Jan 11, 2022
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2. update unrelated reporting snapshot

   

   trevor-scheer committed Jan 11, 2022
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3. track the generated sdl rather than the result, this is the one that'… …

   …s actually consumed by gateway

   

   trevor-scheer committed Jan 11, 2022
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4. Merge branch 'main' into trevor/improve-supergraphSdl-v2

   

   trevor-scheer committed Jan 11, 2022
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