What is BlockingQueue and where we can use it?
java. util. concurrent. BlockingQueue is a java Queue that support operations that wait for the queue to become non-empty when retrieving and removing an element, and wait for space to become available in the queue when adding an element.
Which method of BlockingQueue throws exception?
element() The BlockingQueue element() method will return the first element of the BlockingQueue without removing it. If the BlockingQueue does not contain any elements, the element() method will throw a NoSuchElementException.
What happens when blocking queue is full?
put( ): The method inserts an element to the BlockingQueue. If in case the queue is full, the put( ) method waits until the queue has some vacant space to insert an element. ii. take( ): The method removes and returns an element from the BlockingQueue.
What is BlockingQueue in Java?
The BlockingQueue implementations are thread-safe, safely be used with multiple producers and multiple consumers. 1. BlockingQueue A simple BlockingQueueexample, a producer generates data and put it into a queue, at the same time, a consumer takes the data from the same queue. 1.1 Producer – A Runnableobject to put 20 integers into a queue.
What is an example of a blocking queue?
BlockingQueue A simple BlockingQueueexample, a producer generates data and put it into a queue, at the same time, a consumer takes the data from the same queue. 1.1 Producer – A Runnableobject to put 20 integers into a queue.
Is it possible to close a BlockingQueue after adding only some elements?
So it is possible, for example, for addAll (c) to fail (throwing an exception) after adding only some of the elements in c . A BlockingQueue does not intrinsically support any kind of “close” or “shutdown” operation to indicate that no more items will be added. The needs and usage of such features tend to be implementation-dependent.
Can a BlockingQueue be used with multiple producers?
For example, a common tactic is for producers to insert special end-of-stream or poison objects, that are interpreted accordingly when taken by consumers. Usage example, based on a typical producer-consumer scenario. Note that a BlockingQueue can safely be used with multiple producers and multiple consumers.