object Derive
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trait
AcquireRelease[-R, +E, A] extends Scoped[R, E]
A special form of Scoped for convenience.
A special form of Scoped for convenience.
When using ZLayer.derive with a type that implements
AcquireRelease
, the providedacquire
andrelease
methods will be automatically utilized as the lifecycle hooks.- Note
This trait's lifecycle hooks are specifically designed to work with ZLayer.derive. Using it outside this context won't inherently attach any lifecycle behaviors to the type.
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trait
Default[+A] extends AnyRef
Provides a default way to construct or provide an instance of type
A
.Provides a default way to construct or provide an instance of type
A
.Used during
ZLayer
derivation to resolve dependencies. If an implicitZLayer.Derive.Default[A]
instance exists for a type, it signifies that a default value can be used, bypassing the dependency in theZLayer
environment.- Note
When type-annotating the implicit val, ensure it's in the form
Default.WithContext[R, E, A]
rather than justDefault[A]
to ensure correct type inference and dependency resolution duringZLayer
derivation.
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trait
Scoped[-R, +E] extends AnyRef
Defines a resourceful effect that will be attached to the lifetime of the
ZLayer
derived by ZLayer.derive.Defines a resourceful effect that will be attached to the lifetime of the
ZLayer
derived by ZLayer.derive.The 'resourceful' effect might be a background task, a lock file, or etc., that can be managed by Scope.
If scoped fails during resource acquisition, the entire
ZLayer
initialization process fails.- Note
This trait is specifically designed to work with ZLayer.derive. Using it outside this context won't inherently attach any resourceful behaviors to the type.
class ThirdPartyService(connection: Connection) extends ZLayer.Derive.Scoped[Any, Nothing] { // Repeats health check every 10 seconds in background during the layer's lifetime override def scoped(implicit trace: Trace): ZIO[Scope, Nothing, Any] = connection.healthCheck .ignoreLogged .repeat(Schedule.spaced(10.seconds)) .forkScoped } object ThirdPartyService { // `ZLayer.Derive.Scoped` should be used with `ZLayer.derive` val layer = ZLayer.derive[ThirdPartyService] }
Value Members
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final
def
!=(arg0: Any): Boolean
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final
def
##(): Int
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final
def
==(arg0: Any): Boolean
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final
def
asInstanceOf[T0]: T0
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def
clone(): AnyRef
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final
def
eq(arg0: AnyRef): Boolean
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def
equals(arg0: Any): Boolean
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def
finalize(): Unit
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final
def
getClass(): Class[_]
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def
hashCode(): Int
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final
def
isInstanceOf[T0]: Boolean
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final
def
ne(arg0: AnyRef): Boolean
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final
def
notify(): Unit
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final
def
notifyAll(): Unit
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final
def
synchronized[T0](arg0: ⇒ T0): T0
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def
toString(): String
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final
def
wait(): Unit
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final
def
wait(arg0: Long, arg1: Int): Unit
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final
def
wait(arg0: Long): Unit
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- object Default extends DefaultInstances0