Module io.helidon.common.concurrency.limits

Package io.helidon.common.concurrency.limits

Interface FixedLimitConfig

All Superinterfaces:

Prototype.Api, Prototype.Factory<FixedLimit>

All Known Implementing Classes:

FixedLimitConfig.BuilderBase.FixedLimitConfigImpl

public interface FixedLimitConfig
extends Prototype.Api

Configuration of FixedLimit.

See Also:

• permits()
• queueLength()
• queueTimeout()
• builder()
• create()

Nested Class Summary

Nested Classes

Modifier and Type	Interface	Description
static class	FixedLimitConfig.Builder	Fluent API builder for FixedLimit.
static class	FixedLimitConfig.BuilderBase<BUILDER extends FixedLimitConfig.BuilderBase<BUILDER,PROTOTYPE>,PROTOTYPE extends FixedLimitConfig>	Fluent API builder base for FixedLimit.

Method Summary

Modifier and Type	Method	Description
static FixedLimitConfig.Builder	builder()	Create a new fluent API builder to customize configuration.
static FixedLimitConfig.Builder	builder(FixedLimitConfig instance)	Create a new fluent API builder from an existing instance.
Optional<Supplier<Long>>	clock()	A clock that supplies nanosecond time.
static FixedLimitConfig	create()	Create a new instance with default values.
static FixedLimitConfig	create(Config config)	Create a new instance from configuration.
boolean	enableMetrics()	Whether to collect metrics for the AIMD implementation.
boolean	fair()	Whether the Semaphore should be Semaphore.isFair().
String	name()	Name of this instance.
int	permits()	Number of permit to allow.
int	queueLength()	How many requests can be enqueued waiting for a permit.
Duration	queueTimeout()	How long to wait for a permit when enqueued.
Optional<Semaphore>	semaphore()	Explicitly configured semaphore.

Methods inherited from interface io.helidon.builder.api.Prototype.Factory

build

Method Details

builder

static FixedLimitConfig.Builder builder()

Create a new fluent API builder to customize configuration.

Returns:

a new builder

builder

static FixedLimitConfig.Builder builder(FixedLimitConfig instance)

Create a new fluent API builder from an existing instance.

Parameters:

instance - an existing instance used as a base for the builder

Returns:

a builder based on an instance

create

static FixedLimitConfig create(Config config)

Create a new instance from configuration.

Parameters:

config - used to configure the new instance

Returns:

a new instance configured from configuration

create

static FixedLimitConfig create()

Create a new instance with default values.

Returns:

a new instance

permits

int permits()

Number of permit to allow. Defaults to 0. When set to 0, we switch to unlimited.

Returns:

number of permits

fair

boolean fair()

Whether the Semaphore should be Semaphore.isFair(). Defaults to false.

Returns:

whether this should be a fair semaphore

queueLength

int queueLength()

How many requests can be enqueued waiting for a permit. Note that this may not be an exact behavior due to concurrent invocations. We use Semaphore.getQueueLength() in the FixedLimit implementation. Default value is 0. If set to {code 0}, there is no queueing.

Returns:

number of requests to enqueue

queueTimeout

Duration queueTimeout()

How long to wait for a permit when enqueued. Defaults to "PT1S"

Returns:

duration of the timeout

name

String name()

Name of this instance.

Returns:

name of the instance

semaphore

Optional<Semaphore> semaphore()

Explicitly configured semaphore. Note that if this is set, all other configuration is ignored.

Returns:

semaphore instance

clock

Optional<Supplier<Long>> clock()

A clock that supplies nanosecond time.

Returns:

supplier of current nanoseconds, defaults to System.nanoTime()

enableMetrics

boolean enableMetrics()

Whether to collect metrics for the AIMD implementation.

Returns:

metrics flag