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.
- Companion:
- object
Value members
Concrete methods
Combines this layer with the specified layer, producing a new layer that has the inputs of both layers, and the outputs of both layers.
Combines this layer with the specified layer, producing a new layer that has the inputs of both layers, and the outputs of both layers.
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 both this layer and the specified layer.
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 both this layer and the specified layer.
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.
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.
Constructs a layer dynamically based on the output of this layer.
Constructs a layer dynamically based on the output of this layer.
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.
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.
Creates a fresh version of this layer that will not be shared.
Creates a fresh version of this layer that will not be shared.
Builds this layer and uses it until it is interrupted. This is useful when your entire application is a layer, such as an HTTP server.
Builds this layer and uses it until it is interrupted. This is useful when your entire application is a layer, such as an HTTP server.
Returns a new layer whose output is mapped by the specified function.
Returns a new layer whose output is mapped by the specified function.
Returns a layer with its error channel mapped using the specified function.
Returns a layer with its error channel mapped using the specified function.
Returns a managed effect that, if evaluated, will return the lazily computed result of this layer.
Returns a managed effect that, if evaluated, will return the lazily computed result of this layer.
Translates effect failure into death of the fiber, making all failures unchecked and not a part of the type of the layer.
Translates effect failure into death of the fiber, making all failures unchecked and not a part of the type of the layer.
Executes this layer and returns its output, if it succeeds, but otherwise executes the specified layer.
Executes this layer and returns its output, if it succeeds, but otherwise executes the specified layer.
Returns a new layer that produces the outputs of this layer but also passes through the inputs to this layer.
Returns a new layer that produces the outputs of this layer but also passes through the inputs to this layer.
Projects out part of one of the layers output by this layer using the specified function
Projects out part of one of the layers output by this layer using the specified function
Retries constructing this layer according to the specified schedule.
Retries constructing this layer according to the specified schedule.
Performs the specified effect if this layer succeeds.
Performs the specified effect if this layer succeeds.
Performs the specified effect if this layer fails.
Performs the specified effect if this layer fails.
Converts a layer that requires no services into a managed runtime, which can be used to execute effects.
Converts a layer that requires no services into a managed runtime, which can be used to execute effects.
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 into a tuple.
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 into a tuple.
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.
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.