Package org.apache.groovy.runtime.async

Class AsyncClosureUtils

java.lang.Object
org.apache.groovy.runtime.async.AsyncClosureUtils
public final class AsyncClosureUtils extends Object
Closure-specific async utilities that have no pure-Java equivalent.

These methods create Closure subclasses and are therefore inherently Groovy-specific. They predate the async keyword and are retained for programmatic use. The async { ... } keyword syntax is preferred for most use cases.

Since:
6.0.0
See Also:

  • Method Details

    • wrapAsync

      public static <T> Closure<Awaitable<T>> wrapAsync(Closure<T> closure)
      Wraps a closure so that each invocation executes the body asynchronously and returns an Awaitable. 
      
 def asyncTask = AsyncClosureUtils.wrapAsync { expensiveWork() }
 def result = await asyncTask()
      Type Parameters:
      T - the result type
      Parameters:
      closure - the closure to wrap
      Returns:
      a closure that returns an Awaitable on each call

    • wrapAsyncGenerator

      public static <T> Closure<Iterable<T>> wrapAsyncGenerator(Closure<?> closure)
      Wraps a generator closure so that each invocation returns an Iterable backed by a GeneratorBridge.
      Type Parameters:
      T - the element type
      Parameters:
      closure - the generator closure; receives a GeneratorBridge as its first parameter
      Returns:
      a closure that produces an Iterable on each call