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Sarah French cf047be4e4 PSS: Use interfaces to configure state stores (#37899 ) * refactor: Move chunk size limit constants to new `chunks` package * refactor: Make `NewPluggable` return a `Pluggable` concrete type, instead of an instance of the `backend.Backend` interface. * refactor: Configure state stores through the backend.Backend interface, instead of directly using methods related to RPCs. This requires changing where we call `SetStateStoreChunkSize`. * docs: Add godocs comment to `StateStoreChunkSizeSetter` interface To summarize, we don't really need the `SetStateStoreChunkSize` method, and instead methods like `(GRPCProvider).ConfigureStateStore` in the `plugin6` package can directly inspect the negotiation process that passes through that code and pull out the chunk size. However that means that that code would also need to implement validation. And that's just `(GRPCProvider).ConfigureStateStore`; what about all the test mocks that are used in different types of test? They would all need to be implemented similarly to GRPCProvider to be good, useful mocks, and then a lot of things that fulfil the provider.Interface interface are coupled to each other. Instead, it's easier to have validation in the `grpcClient` struct's methods in the `remote` package, as that code is common to all scenarios. That code needs a method to 'reach into' the provider.Interface value, so we use the `SetStateStoreChunkSize` method. * chore: Make it clearer that the v6 GRPCProvider implements `SetStateStoreChunkSize` * fix: Remove unnecessary assignment of chunk size I'm surprised that removing this doesn't break E2E tests of PSS that use grpcwrap, but I think there's `plugin6` code that runs in that situation, so maybe chunking is handled elsewhere. * chore: Add panic to try detect unexpected cases when setting chunk size. * feat: Add `providers.StateStoreChunkSizeSetter` implementation to provider-simple-v6 * docs: Update code comments for NewPluggable describing its intended use	6 months ago
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chunks.go	…

PSS: Use interfaces to configure state stores (#37899 )

* refactor: Move chunk size limit constants to new `chunks` package

* refactor: Make `NewPluggable` return a `Pluggable` concrete type, instead of an instance of the `backend.Backend` interface.

* refactor: Configure state stores through the backend.Backend interface, instead of directly using methods related to RPCs. This requires changing where we call `SetStateStoreChunkSize`.

* docs: Add godocs comment to `StateStoreChunkSizeSetter` interface

To summarize, we don't really need the `SetStateStoreChunkSize` method, and instead methods like `(*GRPCProvider).ConfigureStateStore` in the `plugin6` package can directly inspect the negotiation process that passes through that code and pull out the chunk size. However that means that that code would also need to implement validation. And that's just `(*GRPCProvider).ConfigureStateStore`; what about all the test mocks that are used in different types of test? They would all need to be implemented similarly to GRPCProvider to be good, useful mocks, and then a lot of things that fulfil the provider.Interface interface are coupled to each other. Instead, it's easier to have validation in the `grpcClient` struct's methods in the `remote` package, as that code is common to all scenarios. That code needs a method to 'reach into'  the provider.Interface value, so we use the `SetStateStoreChunkSize` method.

* chore: Make it clearer that the v6 GRPCProvider implements `SetStateStoreChunkSize`

* fix: Remove unnecessary assignment of chunk size

I'm surprised that removing this doesn't break E2E tests of PSS that use grpcwrap, but I think there's `plugin6` code that runs in that situation, so maybe chunking is handled elsewhere.

* chore: Add panic to try detect unexpected cases when setting chunk size.

* feat: Add `providers.StateStoreChunkSizeSetter` implementation to provider-simple-v6

* docs: Update code comments for NewPluggable describing its intended use

chunks.go

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