| ... | ... | @@ -5,68 +5,70 @@ import * as Semaphore from "effect/Semaphore"; |
| 5 | 5 | import type { ServerProviderShape } from "./Services/ServerProvider"; |
| 6 | 6 | import { ServerSettingsError } from "@t3tools/contracts"; |
| 7 | 7 | |
| 8 | | export function makeManagedServerProvider<Settings>(input: { |
| 8 | export const makeManagedServerProvider = Effect.fn("makeManagedServerProvider")(function* < |
| 9 | Settings, |
| 10 | >(input: { |
| 9 | 11 | readonly getSettings: Effect.Effect<Settings>; |
| 10 | 12 | readonly streamSettings: Stream.Stream<Settings>; |
| 11 | 13 | readonly haveSettingsChanged: (previous: Settings, next: Settings) => boolean; |
| 12 | 14 | readonly checkProvider: Effect.Effect<ServerProvider, ServerSettingsError>; |
| 13 | 15 | readonly refreshInterval?: Duration.Input; |
| 14 | | }): Effect.Effect<ServerProviderShape, ServerSettingsError, Scope.Scope> { |
| 15 | | return Effect.gen(function* () { |
| 16 | | const refreshSemaphore = yield* Semaphore.make(1); |
| 17 | | const changesPubSub = yield* Effect.acquireRelease( |
| 18 | | PubSub.unbounded<ServerProvider>(), |
| 19 | | PubSub.shutdown, |
| 20 | | ); |
| 21 | | const initialSettings = yield* input.getSettings; |
| 22 | | const initialSnapshot = yield* input.checkProvider; |
| 23 | | const snapshotRef = yield* Ref.make(initialSnapshot); |
| 24 | | const settingsRef = yield* Ref.make(initialSettings); |
| 16 | }): Effect.fn.Return<ServerProviderShape, ServerSettingsError, Scope.Scope> { |
| 17 | const refreshSemaphore = yield* Semaphore.make(1); |
| 18 | const changesPubSub = yield* Effect.acquireRelease( |
| 19 | PubSub.unbounded<ServerProvider>(), |
| 20 | PubSub.shutdown, |
| 21 | ); |
| 22 | const initialSettings = yield* input.getSettings; |
| 23 | const initialSnapshot = yield* input.checkProvider; |
| 24 | const snapshotRef = yield* Ref.make(initialSnapshot); |
| 25 | const settingsRef = yield* Ref.make(initialSettings); |
| 25 | 26 | |
| 26 | | const applySnapshot = (nextSettings: Settings, options?: { readonly forceRefresh?: boolean }) => |
| 27 | | refreshSemaphore.withPermits(1)( |
| 28 | | Effect.gen(function* () { |
| 29 | | const forceRefresh = options?.forceRefresh === true; |
| 30 | | const previousSettings = yield* Ref.get(settingsRef); |
| 31 | | if (!forceRefresh && !input.haveSettingsChanged(previousSettings, nextSettings)) { |
| 32 | | yield* Ref.set(settingsRef, nextSettings); |
| 33 | | return yield* Ref.get(snapshotRef); |
| 34 | | } |
| 27 | const applySnapshotBase = Effect.fn("applySnapshot")(function* ( |
| 28 | nextSettings: Settings, |
| 29 | options?: { readonly forceRefresh?: boolean }, |
| 30 | ) { |
| 31 | const forceRefresh = options?.forceRefresh === true; |
| 32 | const previousSettings = yield* Ref.get(settingsRef); |
| 33 | if (!forceRefresh && !input.haveSettingsChanged(previousSettings, nextSettings)) { |
| 34 | yield* Ref.set(settingsRef, nextSettings); |
| 35 | return yield* Ref.get(snapshotRef); |
| 36 | } |
| 35 | 37 | |
| 36 | | const nextSnapshot = yield* input.checkProvider; |
| 37 | | yield* Ref.set(settingsRef, nextSettings); |
| 38 | | yield* Ref.set(snapshotRef, nextSnapshot); |
| 39 | | yield* PubSub.publish(changesPubSub, nextSnapshot); |
| 40 | | return nextSnapshot; |
| 41 | | }), |
| 42 | | ); |
| 38 | const nextSnapshot = yield* input.checkProvider; |
| 39 | yield* Ref.set(settingsRef, nextSettings); |
| 40 | yield* Ref.set(snapshotRef, nextSnapshot); |
| 41 | yield* PubSub.publish(changesPubSub, nextSnapshot); |
| 42 | return nextSnapshot; |
| 43 | }); |
| 44 | const applySnapshot = (nextSettings: Settings, options?: { readonly forceRefresh?: boolean }) => |
| 45 | refreshSemaphore.withPermits(1)(applySnapshotBase(nextSettings, options)); |
| 43 | 46 | |
| 44 | | const refreshSnapshot = Effect.gen(function* () { |
| 45 | | const nextSettings = yield* input.getSettings; |
| 46 | | return yield* applySnapshot(nextSettings, { forceRefresh: true }); |
| 47 | | }); |
| 47 | const refreshSnapshot = Effect.fn("refreshSnapshot")(function* () { |
| 48 | const nextSettings = yield* input.getSettings; |
| 49 | return yield* applySnapshot(nextSettings, { forceRefresh: true }); |
| 50 | }); |
| 48 | 51 | |
| 49 | | yield* Stream.runForEach(input.streamSettings, (nextSettings) => |
| 50 | | Effect.asVoid(applySnapshot(nextSettings)), |
| 51 | | ).pipe(Effect.forkScoped); |
| 52 | yield* Stream.runForEach(input.streamSettings, (nextSettings) => |
| 53 | Effect.asVoid(applySnapshot(nextSettings)), |
| 54 | ).pipe(Effect.forkScoped); |
| 52 | 55 | |
| 53 | | yield* Effect.forever( |
| 54 | | Effect.sleep(input.refreshInterval ?? "60 seconds").pipe( |
| 55 | | Effect.flatMap(() => refreshSnapshot), |
| 56 | | Effect.ignoreCause({ log: true }), |
| 57 | | ), |
| 58 | | ).pipe(Effect.forkScoped); |
| 56 | yield* Effect.forever( |
| 57 | Effect.sleep(input.refreshInterval ?? "60 seconds").pipe( |
| 58 | Effect.flatMap(() => refreshSnapshot()), |
| 59 | Effect.ignoreCause({ log: true }), |
| 60 | ), |
| 61 | ).pipe(Effect.forkScoped); |
| 59 | 62 | |
| 60 | | return { |
| 61 | | getSnapshot: input.getSettings.pipe( |
| 62 | | Effect.flatMap(applySnapshot), |
| 63 | | Effect.tapError(Effect.logError), |
| 64 | | Effect.orDie, |
| 65 | | ), |
| 66 | | refresh: refreshSnapshot.pipe(Effect.tapError(Effect.logError), Effect.orDie), |
| 67 | | get streamChanges() { |
| 68 | | return Stream.fromPubSub(changesPubSub); |
| 69 | | }, |
| 70 | | } satisfies ServerProviderShape; |
| 71 | | }); |
| 72 | | } |
| 63 | return { |
| 64 | getSnapshot: input.getSettings.pipe( |
| 65 | Effect.flatMap(applySnapshot), |
| 66 | Effect.tapError(Effect.logError), |
| 67 | Effect.orDie, |
| 68 | ), |
| 69 | refresh: refreshSnapshot().pipe(Effect.tapError(Effect.logError), Effect.orDie), |
| 70 | get streamChanges() { |
| 71 | return Stream.fromPubSub(changesPubSub); |
| 72 | }, |
| 73 | } satisfies ServerProviderShape; |
| 74 | }); |