Package com.yworkflow.common

Interface WorkflowCallable<R,T extends Throwable>

Type Parameters:
R - the type of the result of the callable
T - the type of exception that may be thrown
Functional Interface:
This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.
@FunctionalInterface public interface WorkflowCallable<R,T extends Throwable>
A functional interface that represents a task that returns a result and potentially throws a checked exception. This is similar to Java's Callable but allows for checked exceptions.

WorkflowCallable is used throughout the yWorkflow system for operations that compute values and may fail, such as data retrieval, calculations, business logic processing, and other operations that return results.

This interface is particularly useful in workflow contexts where operations may fail due to business rules, external service calls, or other recoverable conditions that should be handled explicitly.

Since:
1.0
See Also:

  • Method Summary

    Modifier and Type
    Method
    Description
    R
    call()
    Computes a result, or throws an exception if unable to do so.
    static <R, T extends Throwable>
    WorkflowCallable<R,T>
    noReturn(WorkflowRunnable<T> runnable)
    Creates a WorkflowCallable from a WorkflowRunnable.

  • Method Details

    • call

      R call() throws T
      Computes a result, or throws an exception if unable to do so.
      Returns:
      computed result
      Throws:
      T - if unable to compute a result

    • noReturn

      static <R, T extends Throwable> WorkflowCallable<R,T> noReturn(WorkflowRunnable<T> runnable)
      Creates a WorkflowCallable from a WorkflowRunnable. The returned callable will execute the runnable and return null.
      Type Parameters:
      R - the return type (will be null)
      T - the exception type
      Parameters:
      runnable - the runnable to convert
      Returns:
      a callable that executes the runnable and returns null