public abstract class IteratingNestedCallback extends IteratingCallback
This specialized callback is used when breaking up an asynchronous task into smaller asynchronous tasks. A typical pattern is that a successful callback is used to schedule the next sub task, but if that task completes quickly and uses the calling thread to callback the success notification, this can result in a growing stack depth.
To avoid this issue, this callback uses an AtomicBoolean to note if the success callback has been called during the processing of a sub task, and if so then the processing iterates rather than recurses.
This callback is passed to the asynchronous handling of each sub
task and a call the
IteratingCallback.succeeded() on this call back represents
completion of the subtask. Only once all the subtasks are completed is
Callback.succeeded() method called on the
passed the the
|Constructor and Description|
|Modifier and Type||Method and Description|
Invoked when the overall task has completed successfully.
Invoked when the sub task fails.
isFailed, isIdle, isSucceeded, iterate, process, succeeded
public IteratingNestedCallback(Callback callback)
protected void completed()
public void failed(Throwable x)
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