<K>(key: K, permits: number): (
self: PartitionedSemaphore<K>
) => Effect.Effect<void>
<K>(
self: PartitionedSemaphore<K>,
key: K,
permits: number
): Effect.Effect<void>Returns an effect that acquires the requested number of permits for the given partition key.
When to use
Use when you need manual permit acquisition for a partition and want to control acquisition and release as separate effects.
Details
If enough permits are available, the effect completes immediately. Otherwise it waits until released permits are assigned to this partition.
Gotchas
Requests for more permits than the semaphore capacity never complete. Requests for zero or a negative number of permits complete without acquiring anything.
export const const take: {
<K>(key: K, permits: number): (
self: PartitionedSemaphore<K>
) => Effect.Effect<void>
<K>(
self: PartitionedSemaphore<K>,
key: K,
permits: number
): Effect.Effect<void>
}
Returns an effect that acquires the requested number of permits for the
given partition key.
When to use
Use when you need manual permit acquisition for a partition and want to
control acquisition and release as separate effects.
Details
If enough permits are available, the effect completes immediately. Otherwise
it waits until released permits are assigned to this partition.
Gotchas
Requests for more permits than the semaphore capacity never complete.
Requests for zero or a negative number of permits complete without acquiring
anything.
take: {
<function (type parameter) K in <K>(key: K, permits: number): (self: PartitionedSemaphore<K>) => Effect.Effect<void>K>(key: Kkey: function (type parameter) K in <K>(key: K, permits: number): (self: PartitionedSemaphore<K>) => Effect.Effect<void>K, permits: numberpermits: number): (self: PartitionedSemaphore<K>(parameter) self: {
capacity: number;
available: Effect.Effect<number>;
take: (key: K, permits: number) => Effect.Effect<void>;
release: (permits: number) => Effect.Effect<number>;
withPermits: (key: K, permits: number) => <A, E, R>(effect: Effect.Effect<A, E, R>) => Effect.Effect<A, E, R>;
withPermit: (key: K) => <A, E, R>(effect: Effect.Effect<A, E, R>) => Effect.Effect<A, E, R>;
withPermitsIfAvailable: (permits: number) => <A, E, R>(effect: Effect.Effect<A, E, R>) => Effect.Effect<Option.Option<A>, E, R>;
}
interface PartitionedSemaphore<in K>A PartitionedSemaphore controls access to a shared permit pool while
tracking waiters by partition key.
When to use
Use to coordinate shared permits across partition keys so waiting groups make
progress without one group monopolizing the pool.
Details
Waiting permits are distributed across partitions in round-robin order.
PartitionedSemaphore<function (type parameter) K in <K>(key: K, permits: number): (self: PartitionedSemaphore<K>) => Effect.Effect<void>K>) => import EffectEffect.interface Effect<out A, out E = never, out R = never>The Effect interface defines a value that lazily describes a workflow or
job. The workflow requires some context R, and may fail with an error of
type E, or succeed with a value of type A.
When to use
Use when you need to represent a lazy, composable workflow that can require
services, fail with a typed error, or succeed with a typed value.
Details
Effect values model resourceful interaction with the outside world,
including synchronous, asynchronous, concurrent, and parallel interaction.
They use a fiber-based concurrency model, with built-in support for
scheduling, fine-grained interruption, structured concurrency, and high
scalability.
To run an Effect value, you need a Runtime, which is a type that is
capable of executing Effect values.
Effect<void>
<function (type parameter) K in <K>(self: PartitionedSemaphore<K>, key: K, permits: number): Effect.Effect<void>K>(self: PartitionedSemaphore<K>(parameter) self: {
capacity: number;
available: Effect.Effect<number>;
take: (key: K, permits: number) => Effect.Effect<void>;
release: (permits: number) => Effect.Effect<number>;
withPermits: (key: K, permits: number) => <A, E, R>(effect: Effect.Effect<A, E, R>) => Effect.Effect<A, E, R>;
withPermit: (key: K) => <A, E, R>(effect: Effect.Effect<A, E, R>) => Effect.Effect<A, E, R>;
withPermitsIfAvailable: (permits: number) => <A, E, R>(effect: Effect.Effect<A, E, R>) => Effect.Effect<Option.Option<A>, E, R>;
}
interface PartitionedSemaphore<in K>A PartitionedSemaphore controls access to a shared permit pool while
tracking waiters by partition key.
When to use
Use to coordinate shared permits across partition keys so waiting groups make
progress without one group monopolizing the pool.
Details
Waiting permits are distributed across partitions in round-robin order.
PartitionedSemaphore<function (type parameter) K in <K>(self: PartitionedSemaphore<K>, key: K, permits: number): Effect.Effect<void>K>, key: Kkey: function (type parameter) K in <K>(self: PartitionedSemaphore<K>, key: K, permits: number): Effect.Effect<void>K, permits: numberpermits: number): import EffectEffect.interface Effect<out A, out E = never, out R = never>The Effect interface defines a value that lazily describes a workflow or
job. The workflow requires some context R, and may fail with an error of
type E, or succeed with a value of type A.
When to use
Use when you need to represent a lazy, composable workflow that can require
services, fail with a typed error, or succeed with a typed value.
Details
Effect values model resourceful interaction with the outside world,
including synchronous, asynchronous, concurrent, and parallel interaction.
They use a fiber-based concurrency model, with built-in support for
scheduling, fine-grained interruption, structured concurrency, and high
scalability.
To run an Effect value, you need a Runtime, which is a type that is
capable of executing Effect values.
Effect<void>
} = dual<(...args: Array<any>) => any, <K>(self: PartitionedSemaphore<K>, key: K, permits: number) => Effect.Effect<void>>(arity: 3, body: <K>(self: PartitionedSemaphore<K>, key: K, permits: number) => Effect.Effect<void>): ((...args: Array<any>) => any) & (<K>(self: PartitionedSemaphore<K>, key: K, permits: number) => Effect.Effect<void>) (+1 overload)Creates a function that can be called in data-first style or data-last
(pipe-friendly) style.
When to use
Use to expose one implementation through both direct and pipe-friendly
call styles.
Details
Pass either the arity of the uncurried function or a predicate that decides
whether the current call is data-first. Arity is the common case. Use a
predicate when optional arguments make arity ambiguous.
Example (Selecting data-first or data-last style by arity)
import { Function, pipe } from "effect"
const sum = Function.dual<
(that: number) => (self: number) => number,
(self: number, that: number) => number
>(2, (self, that) => self + that)
console.log(sum(2, 3)) // 5
console.log(pipe(2, sum(3))) // 5
Example (Defining overloads with call signatures)
import { Function, pipe } from "effect"
const sum: {
(that: number): (self: number) => number
(self: number, that: number): number
} = Function.dual(2, (self: number, that: number): number => self + that)
console.log(sum(2, 3)) // 5
console.log(pipe(2, sum(3))) // 5
Example (Selecting data-first or data-last style with a predicate)
import { Function, pipe } from "effect"
const sum = Function.dual<
(that: number) => (self: number) => number,
(self: number, that: number) => number
>(
(args) => args.length === 2,
(self, that) => self + that
)
console.log(sum(2, 3)) // 5
console.log(pipe(2, sum(3))) // 5
dual(3, <function (type parameter) K in <K>(self: PartitionedSemaphore<K>, key: K, permits: number): Effect.Effect<void>K>(self: PartitionedSemaphore<K>(parameter) self: {
capacity: number;
available: Effect.Effect<number>;
take: (key: K, permits: number) => Effect.Effect<void>;
release: (permits: number) => Effect.Effect<number>;
withPermits: (key: K, permits: number) => <A, E, R>(effect: Effect.Effect<A, E, R>) => Effect.Effect<A, E, R>;
withPermit: (key: K) => <A, E, R>(effect: Effect.Effect<A, E, R>) => Effect.Effect<A, E, R>;
withPermitsIfAvailable: (permits: number) => <A, E, R>(effect: Effect.Effect<A, E, R>) => Effect.Effect<Option.Option<A>, E, R>;
}
interface PartitionedSemaphore<in K>A PartitionedSemaphore controls access to a shared permit pool while
tracking waiters by partition key.
When to use
Use to coordinate shared permits across partition keys so waiting groups make
progress without one group monopolizing the pool.
Details
Waiting permits are distributed across partitions in round-robin order.
PartitionedSemaphore<function (type parameter) K in <K>(self: PartitionedSemaphore<K>, key: K, permits: number): Effect.Effect<void>K>, key: Kkey: function (type parameter) K in <K>(self: PartitionedSemaphore<K>, key: K, permits: number): Effect.Effect<void>K, permits: numberpermits: number): import EffectEffect.interface Effect<out A, out E = never, out R = never>The Effect interface defines a value that lazily describes a workflow or
job. The workflow requires some context R, and may fail with an error of
type E, or succeed with a value of type A.
When to use
Use when you need to represent a lazy, composable workflow that can require
services, fail with a typed error, or succeed with a typed value.
Details
Effect values model resourceful interaction with the outside world,
including synchronous, asynchronous, concurrent, and parallel interaction.
They use a fiber-based concurrency model, with built-in support for
scheduling, fine-grained interruption, structured concurrency, and high
scalability.
To run an Effect value, you need a Runtime, which is a type that is
capable of executing Effect values.
Effect<void> => self: PartitionedSemaphore<K>(parameter) self: {
capacity: number;
available: Effect.Effect<number>;
take: (key: K, permits: number) => Effect.Effect<void>;
release: (permits: number) => Effect.Effect<number>;
withPermits: (key: K, permits: number) => <A, E, R>(effect: Effect.Effect<A, E, R>) => Effect.Effect<A, E, R>;
withPermit: (key: K) => <A, E, R>(effect: Effect.Effect<A, E, R>) => Effect.Effect<A, E, R>;
withPermitsIfAvailable: (permits: number) => <A, E, R>(effect: Effect.Effect<A, E, R>) => Effect.Effect<Option.Option<A>, E, R>;
}
PartitionedSemaphore<K>.take: (key: K, permits: number) => Effect.Effect<void>take(key: Kkey, permits: numberpermits))