AsyncQueueHandler

```
final class AsyncQueueHandler<T>

                    
```
Asynchronously reads items from provided queue on separate thread borrowed from executor and process items with specified handler. Thread is not blocked when queue is empty and returned back to executor pool. New or existing thread is borrowed from executor when queue is non empty and reader is not running

Nested Class Summary

Nested Classes
Modifier and Type	Class	Description
`interface`	`AsyncQueueHandler.Handler`	A simple interface to handle enqueued T items.

Constructor Summary

Constructors
Constructor	Description
`AsyncQueueHandler(BlockingQueue<T> queue, AsyncQueueHandler.Handler<T> handler, String id, ExecutorService executor, long maxSequentiallyHandledItems)`	Constructs instance of AsyncQueueHandler which is capable of asynchronous reading provided queue from thread borrowed from executor to process items with provided handler.

Method Summary

Modifier and Type	Method	Description
`void`	`cancel()`	Attempts to stop execution of reader if running
`void`	`handleQueueItemsUntilEmpty()`	Checks if reader is running on one of executor thread and if no submits execution of reader on executor.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - AsyncQueueHandler
```
AsyncQueueHandler(BlockingQueue<T> queue, AsyncQueueHandler.Handler<T> handler, String id, ExecutorService executor, long maxSequentiallyHandledItems)
```
    Constructs instance of AsyncQueueHandler which is capable of asynchronous reading provided queue from thread borrowed from executor to process items with provided handler.
    
    Parameters:
    
    queue - thread-safe queue which holds items to process
    
    handler - an implementation of handler routine which will beinvoked per each item placed in the queue.
    
    id - optional identifier of current handler for debug purpose
    
    executor - optional executor service to borrow threads from
    
    maxSequentiallyHandledItems - maximum number of items sequentiallyhandled on thread borrowed from before temporaryreleasing thread and re-acquiring it from .
- Method Detail
  - cancel
```
 void cancel()
```
    Attempts to stop execution of reader if running
  - handleQueueItemsUntilEmpty
```
 void handleQueueItemsUntilEmpty()
```
    Checks if reader is running on one of executor thread and if no submits execution of reader on executor.