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/** * @since 3.14.0 * @experimental */ import * as Context from "./Context.js"; import * as Effect from "./Effect.js"; import * as FiberRefsPatch from "./FiberRefsPatch.js"; import { identity } from "./Function.js"; import * as core from "./internal/core.js"; import * as Layer from "./Layer.js"; import * as RcMap from "./RcMap.js"; import * as Runtime from "./Runtime.js"; import * as Scope from "./Scope.js"; /** * @since 3.14.0 * @category Symbols */ export const TypeId = /*#__PURE__*/Symbol.for("effect/LayerMap"); /** * @since 3.14.0 * @category Constructors * @experimental * * A `LayerMap` allows you to create a map of Layer's that can be used to * dynamically access resources based on a key. * * ```ts * import { NodeRuntime } from "@effect/platform-node" * import { Context, Effect, FiberRef, Layer, LayerMap } from "effect" * * class Greeter extends Context.Tag("Greeter")<Greeter, { * greet: Effect.Effect<string> * }>() {} * * // create a service that wraps a LayerMap * class GreeterMap extends LayerMap.Service<GreeterMap>()("GreeterMap", { * // define the lookup function for the layer map * // * // The returned Layer will be used to provide the Greeter service for the * // given name. * lookup: (name: string) => * Layer.succeed(Greeter, { * greet: Effect.succeed(`Hello, ${name}!`) * }).pipe( * Layer.merge(Layer.locallyScoped(FiberRef.currentConcurrency, 123)) * ), * * // If a layer is not used for a certain amount of time, it can be removed * idleTimeToLive: "5 seconds", * * // Supply the dependencies for the layers in the LayerMap * dependencies: [] * }) {} * * // usage * const program: Effect.Effect<void, never, GreeterMap> = Effect.gen(function*() { * // access and use the Greeter service * const greeter = yield* Greeter * yield* Effect.log(yield* greeter.greet) * }).pipe( * // use the GreeterMap service to provide a variant of the Greeter service * Effect.provide(GreeterMap.get("John")) * ) * * // run the program * program.pipe( * Effect.provide(GreeterMap.Default), * NodeRuntime.runMain * ) * ``` */ export const make = /*#__PURE__*/Effect.fnUntraced(function* (lookup, options) { const context = yield* Effect.context(); // If we are inside another layer build, use the current memo map, // otherwise create a new one. const memoMap = context.unsafeMap.has(Layer.CurrentMemoMap.key) ? Context.get(context, Layer.CurrentMemoMap) : yield* Layer.makeMemoMap; const rcMap = yield* RcMap.make({ lookup: key => Effect.scopeWith(scope => Effect.diffFiberRefs(Layer.buildWithMemoMap(lookup(key), memoMap, scope))).pipe(Effect.map(([patch, context]) => ({ layer: Layer.scopedContext(core.withFiberRuntime(fiber => { const scope = Context.unsafeGet(fiber.currentContext, Scope.Scope); const oldRefs = fiber.getFiberRefs(); const newRefs = FiberRefsPatch.patch(patch, fiber.id(), oldRefs); const revert = FiberRefsPatch.diff(newRefs, oldRefs); fiber.setFiberRefs(newRefs); return Effect.as(Scope.addFinalizerExit(scope, () => { fiber.setFiberRefs(FiberRefsPatch.patch(revert, fiber.id(), fiber.getFiberRefs())); return Effect.void; }), context); })), runtimeEffect: Effect.withFiberRuntime(fiber => { const fiberRefs = FiberRefsPatch.patch(patch, fiber.id(), fiber.getFiberRefs()); return Effect.succeed(Runtime.make({ context, fiberRefs, runtimeFlags: Runtime.defaultRuntime.runtimeFlags })); }) }))), idleTimeToLive: options?.idleTimeToLive }); return identity({ [TypeId]: TypeId, rcMap, get: key => Layer.unwrapScoped(Effect.map(RcMap.get(rcMap, key), ({ layer }) => layer)), runtime: key => Effect.flatMap(RcMap.get(rcMap, key), ({ runtimeEffect }) => runtimeEffect), invalidate: key => RcMap.invalidate(rcMap, key) }); }); /** * @since 3.14.0 * @category Constructors * @experimental */ export const fromRecord = (layers, options) => make(key => layers[key], options); /** * @since 3.14.0 * @category Service * @experimental * * Create a `LayerMap` service that provides a dynamic set of resources based on * a key. * * ```ts * import { NodeRuntime } from "@effect/platform-node" * import { Context, Effect, FiberRef, Layer, LayerMap } from "effect" * * class Greeter extends Context.Tag("Greeter")<Greeter, { * greet: Effect.Effect<string> * }>() {} * * // create a service that wraps a LayerMap * class GreeterMap extends LayerMap.Service<GreeterMap>()("GreeterMap", { * // define the lookup function for the layer map * // * // The returned Layer will be used to provide the Greeter service for the * // given name. * lookup: (name: string) => * Layer.succeed(Greeter, { * greet: Effect.succeed(`Hello, ${name}!`) * }).pipe( * Layer.merge(Layer.locallyScoped(FiberRef.currentConcurrency, 123)) * ), * * // If a layer is not used for a certain amount of time, it can be removed * idleTimeToLive: "5 seconds", * * // Supply the dependencies for the layers in the LayerMap * dependencies: [] * }) {} * * // usage * const program: Effect.Effect<void, never, GreeterMap> = Effect.gen(function*() { * // access and use the Greeter service * const greeter = yield* Greeter * yield* Effect.log(yield* greeter.greet) * }).pipe( * // use the GreeterMap service to provide a variant of the Greeter service * Effect.provide(GreeterMap.get("John")) * ) * * // run the program * program.pipe( * Effect.provide(GreeterMap.Default), * NodeRuntime.runMain * ) * ``` */ export const Service = () => (id, options) => { const Err = globalThis.Error; const limit = Err.stackTraceLimit; Err.stackTraceLimit = 2; const creationError = new Err(); Err.stackTraceLimit = limit; function TagClass() {} const TagClass_ = TagClass; Object.setPrototypeOf(TagClass, Object.getPrototypeOf(Context.GenericTag(id))); TagClass.key = id; Object.defineProperty(TagClass, "stack", { get() { return creationError.stack; } }); TagClass_.DefaultWithoutDependencies = Layer.scoped(TagClass_, "lookup" in options ? make(options.lookup, options) : fromRecord(options.layers, options)); TagClass_.Default = options.dependencies && options.dependencies.length > 0 ? Layer.provide(TagClass_.DefaultWithoutDependencies, options.dependencies) : TagClass_.DefaultWithoutDependencies; TagClass_.get = key => Layer.unwrapScoped(Effect.map(TagClass_, layerMap => layerMap.get(key))); TagClass_.runtime = key => Effect.flatMap(TagClass_, layerMap => layerMap.runtime(key)); TagClass_.invalidate = key => Effect.flatMap(TagClass_, layerMap => layerMap.invalidate(key)); return TagClass; }; //# sourceMappingURL=LayerMap.js.map