ContextShift provides support for shifting execution.
The shift method inserts an asynchronous boundary, which moves execution
from the calling thread to the default execution environment of F.
The evalOn method provides a way to evaluate a task on a specific execution
context, shifting back to the default execution context after the task completes.
This is NOT a type class, as it does not have the coherence requirement.
- Companion
- object
Value members
Abstract methods
Evaluates fa on the supplied execution context and shifts evaluation
back to the default execution environment of F at the completion of fa,
regardless of success or failure.
Evaluates fa on the supplied execution context and shifts evaluation
back to the default execution environment of F at the completion of fa,
regardless of success or failure.
The primary use case for this method is executing code on a
specific execution context. To execute blocking code, consider using
the blockOn(blocker) method instead.
- Value Params
- ec
Execution context where the evaluation has to be scheduled
- fa
Computation to evaluate using
ec
Evaluates fa on the supplied execution context and shifts evaluation
back to the default execution environment of F at the completion of fa,
regardless of success or failure.
Evaluates fa on the supplied execution context and shifts evaluation
back to the default execution environment of F at the completion of fa,
regardless of success or failure.
The primary use case for this method is executing code on a
specific execution context. To execute blocking code, consider using
the blockOn(blocker) method instead.
- Value Params
- ec
Execution context where the evaluation has to be scheduled
- fa
Computation to evaluate using
ec
Asynchronous boundary described as an effectful F[_] that
can be used in flatMap chains to "shift" the continuation
of the run-loop to another thread or call stack.
Asynchronous boundary described as an effectful F[_] that
can be used in flatMap chains to "shift" the continuation
of the run-loop to another thread or call stack.
This is the Async.shift operation, without the need for an
ExecutionContext taken as a parameter.
Asynchronous boundary described as an effectful F[_] that
can be used in flatMap chains to "shift" the continuation
of the run-loop to another thread or call stack.
Asynchronous boundary described as an effectful F[_] that
can be used in flatMap chains to "shift" the continuation
of the run-loop to another thread or call stack.
This is the Async.shift operation, without the need for an
ExecutionContext taken as a parameter.
Concrete methods
Evaluates fa on the supplied blocker and shifts evaluation
back to the default execution environment of F at the completion of fa,
regardless of success or failure.
Evaluates fa on the supplied blocker and shifts evaluation
back to the default execution environment of F at the completion of fa,
regardless of success or failure.
The primary use case for this method is executing blocking code on a dedicated execution context.
- Value Params
- blocker
blocker where the evaluation has to be scheduled
- fa
Computation to evaluate using
blocker
Evaluates fa on the supplied blocker and shifts evaluation
back to the default execution environment of F at the completion of fa,
regardless of success or failure.
Evaluates fa on the supplied blocker and shifts evaluation
back to the default execution environment of F at the completion of fa,
regardless of success or failure.
The primary use case for this method is executing blocking code on a dedicated execution context.
- Value Params
- blocker
blocker where the evaluation has to be scheduled
- fa
Computation to evaluate using
blocker