ZLayer

A ZLayer[A, E, B] describes a layer of an application: every layer in an application requires some services (the input) and produces some services (the output).

Layers can be thought of as recipes for producing bundles of services, given their dependencies (other services).

Construction of layers can be effectful and utilize resources that must be acquired and safely released when the services are done being utilized.

By default layers are shared, meaning that if the same layer is used twice the layer will only be allocated a single time.

Because of their excellent composition properties, layers are the idiomatic way in ZIO to create services that depend on other services.

Self Type: ZLayer[RIn, E, ROut]

Linear Supertypes

AnyRef, Any

Value Members

final def !=(arg0: Any): Boolean

Definition Classes
AnyRef → Any
final def ##(): Int

Definition Classes
AnyRef → Any
final def ==(arg0: Any): Boolean

Definition Classes
AnyRef → Any
def >>>[E1 >: E, ROut2](that: ZLayer[ROut, E1, ROut2]): ZLayer[RIn, E1, ROut2]

Feeds the output services of this layer into the input of the specified layer, resulting in a new layer with the inputs of this layer, and the outputs of the specified layer.
final def asInstanceOf[T0]: T0

Definition Classes
Any
def build: ZManaged[RIn, E, ROut]

Builds a layer into a managed value.
def clone(): AnyRef

Attributes
protected[java.lang]
Definition Classes
AnyRef
Annotations
@throws( ... )
final def eq(arg0: AnyRef): Boolean

Definition Classes
AnyRef
def equals(arg0: Any): Boolean

Definition Classes
AnyRef → Any
def finalize(): Unit

Attributes
protected[java.lang]
Definition Classes
AnyRef
Annotations
@throws( classOf[java.lang.Throwable] )
def fold[E1, ROut2](failure: ZLayer[Cause[E], E1, ROut2], success: ZLayer[ROut, E1, ROut2])(implicit ev: CanFail[E]): ZLayer[RIn, E1, ROut2]

Feeds the error or output services of this layer into the input of either the specified failure or success layers, resulting in a new layer with the inputs of this layer, and the error or outputs of the specified layer.
def fresh: ZLayer[RIn, E, ROut]

Creates a fresh version of this layer that will not be shared.
final def getClass(): Class[_]

Definition Classes
AnyRef → Any
def hashCode(): Int

Definition Classes
AnyRef → Any
final def isInstanceOf[T0]: Boolean

Definition Classes
Any
def map[ROut1](f: (ROut) ⇒ ROut1): ZLayer[RIn, E, ROut1]

Returns a new layer whose output is mapped by the specified function.
def mapError[E1](f: (E) ⇒ E1)(implicit ev: CanFail[E]): ZLayer[RIn, E1, ROut]

Returns a layer with its error channel mapped using the specified function.
def memoize: ZManaged[Any, Nothing, ZLayer[RIn, E, ROut]]

Returns a managed effect that, if evaluated, will return the lazily computed result of this layer.
final def ne(arg0: AnyRef): Boolean

Definition Classes
AnyRef
final def notify(): Unit

Definition Classes
AnyRef
final def notifyAll(): Unit

Definition Classes
AnyRef
def orDie(implicit ev1: <:<[E, Throwable], ev2: CanFail[E]): ZLayer[RIn, Nothing, ROut]

Translates effect failure into death of the fiber, making all failures unchecked and not a part of the type of the layer.
def orElse[RIn1 <: RIn, E1, ROut1 >: ROut](that: ⇒ ZLayer[RIn1, E1, ROut1])(implicit ev: CanFail[E]): ZLayer[RIn1, E1, ROut1]

Executes this layer and returns its output, if it succeeds, but otherwise executes the specified layer.
final def synchronized[T0](arg0: ⇒ T0): T0

Definition Classes
AnyRef
def toRuntime(p: Platform)(implicit ev: <:<[Any, RIn]): Managed[E, Runtime[ROut]]

Converts a layer that requires no services into a managed runtime, which can be used to execute effects.
def toString(): String

Definition Classes
AnyRef → Any
final def wait(): Unit

Definition Classes
AnyRef
Annotations
@throws( ... )
final def wait(arg0: Long, arg1: Int): Unit

Definition Classes
AnyRef
Annotations
@throws( ... )
final def wait(arg0: Long): Unit

Definition Classes
AnyRef
Annotations
@throws( ... )
def zipWithPar[E1 >: E, RIn2, ROut1 >: ROut, ROut2, ROut3](that: ZLayer[RIn2, E1, ROut2])(f: (ROut, ROut2) ⇒ ROut3): ZLayer[RIn with RIn2, E1, ROut3]

Combines this layer with the specified layer, producing a new layer that has the inputs of both layers, and the outputs of both layers combined using the specified function.

Related Docs: object ZLayer | package zio

final class ZLayer[-RIn, +E, +ROut] extends AnyRef

Value Members

final def !=(arg0: Any): Boolean

final def ##(): Int

final def ==(arg0: Any): Boolean

def >>>[E1 >: E, ROut2](that: ZLayer[ROut, E1, ROut2]): ZLayer[RIn, E1, ROut2]

final def asInstanceOf[T0]: T0

def build: ZManaged[RIn, E, ROut]

def clone(): AnyRef

final def eq(arg0: AnyRef): Boolean

def equals(arg0: Any): Boolean

def finalize(): Unit

def fold[E1, ROut2](failure: ZLayer[Cause[E], E1, ROut2], success: ZLayer[ROut, E1, ROut2])(implicit ev: CanFail[E]): ZLayer[RIn, E1, ROut2]

def fresh: ZLayer[RIn, E, ROut]

final def getClass(): Class[_]

def hashCode(): Int

final def isInstanceOf[T0]: Boolean

def map[ROut1](f: (ROut) ⇒ ROut1): ZLayer[RIn, E, ROut1]

def mapError[E1](f: (E) ⇒ E1)(implicit ev: CanFail[E]): ZLayer[RIn, E1, ROut]

def memoize: ZManaged[Any, Nothing, ZLayer[RIn, E, ROut]]

final def ne(arg0: AnyRef): Boolean

final def notify(): Unit

final def notifyAll(): Unit

def orDie(implicit ev1: <:<[E, Throwable], ev2: CanFail[E]): ZLayer[RIn, Nothing, ROut]

def orElse[RIn1 <: RIn, E1, ROut1 >: ROut](that: ⇒ ZLayer[RIn1, E1, ROut1])(implicit ev: CanFail[E]): ZLayer[RIn1, E1, ROut1]

final def synchronized[T0](arg0: ⇒ T0): T0

def toRuntime(p: Platform)(implicit ev: <:<[Any, RIn]): Managed[E, Runtime[ROut]]

def toString(): String

final def wait(): Unit

final def wait(arg0: Long, arg1: Int): Unit

final def wait(arg0: Long): Unit

def zipWithPar[E1 >: E, RIn2, ROut1 >: ROut, ROut2, ROut3](that: ZLayer[RIn2, E1, ROut2])(f: (ROut, ROut2) ⇒ ROut3): ZLayer[RIn with RIn2, E1, ROut3]

Inherited from AnyRef

Inherited from Any

Ungrouped