What is Scala ExecutionContext?

An ExecutionContext can execute program logic asynchronously, typically but not necessarily on a thread pool. A general purpose ExecutionContext must be asynchronous in executing any Runnable that is passed into its execute -method. The implicit ExecutionContext will be used to execute the callback.

What is the global ExecutionContext?

The Global Execution Context. ExecutionContext. global is an ExecutionContext backed by a ForkJoinPool. Otherwise, there is a risk that the thread pool in the global execution context is starved, and no computation can proceed. By default the ExecutionContext.

How do futures work Scala?

Future represents a result of an asynchronous computation that may or may not be available yet. When we create a new Future, Scala spawns a new thread and executes its code. Once the execution is finished, the result of the computation (value or exception) will be assigned to the Future.

What is blocking in Scala?

blocking method, and according to the Scala documentation this is… Used to designate a piece of code which potentially blocks, allowing the current BlockContext to adjust the runtime’s behavior. Properly marking blocking code may improve performance or avoid deadlocks.

What is ExecutionContext in Spring Batch?

An ExecutionContext is a set of key-value pairs containing information that is scoped to either StepExecution or JobExecution . Spring Batch persists the ExecutionContext , which helps in cases where you want to restart a batch run (e.g., when a fatal error has occurred, etc.).

What is ExecutionContext in C#?

The ExecutionContext class provides the functionality for user code to capture and transfer this context across user-defined asynchronous points. The common language runtime ensures that the ExecutionContext is consistently transferred across runtime-defined asynchronous points within the managed process.

How do you define ExecutionContext?

Execution context (EC) is defined as the environment in which the JavaScript code is executed. By environment, I mean the value of this , variables, objects, and functions JavaScript code has access to at a particular time.

What is callback in Scala?

Scala allows us to define callback functions, which execute upon a Future’s success or failure. In the meantime, the thread that created the Future is unblocked and may continue to execute. The most basic callback is onComplete : scala> add(2,3).onComplete(result => println(result))

What is Monad in Scala?

In Scala, Monads is a construction which performs successive calculations. It is an object which covers the other object. In short, we can say that in Scala the data types that implements map as well as flatMap() like Options, Lists, etc. are called as Monads.

Are futures monads?

Futures can be considered monads if you never construct them with effectful blocks (pure, in-memory computation), or if any effects generated are not considered as part of semantic equivalence (like logging messages).

What is the use of @StepScope?

Annotation Type StepScope Use this on any @Bean that needs to inject @Values from the step context, and any bean that needs to share a lifecycle with a step execution (e.g. an ItemStream).

What is JobBuilderFactory in Spring Batch?

public class JobBuilderFactory extends java.lang.Object. Convenient factory for a JobBuilder which sets the JobRepository automatically. Author: Dave Syer.