What is the use of blocking queue in Java?

What is the use of blocking queue in Java?

BlockingQueue , represents a queue which is thread safe to put elements into, and take elements out of from. In other words, multiple threads can be inserting and taking elements concurrently from a Java BlockingQueue , without any concurrency issues arising.

What are the different ways to solve producer-consumer problem in Java?

There are many ways to solve the producer-consumer problem in Java, like you can solve this by using the wait() and notify() method, as discussed here, or you can use the Semaphore to solve this problem. In this article, you will learn a third way to solve the producer-consumer problem by using BlockingQueue in Java.

Which queue provided by Java suits best for produce consumer problem?

BlockingQueue is excellent when you want to skip the complexity involved in wait – notify statements. This BlockingQueue can be used to solve the producer-consumer problem as well as given blow example.

What is BlockingQueue how can we implement producer-consumer problem using blocking queue?

The BlockingQueue interface provides two methods put() and take() which are used implicitly in blocking the Producer and the Consumer thread respectively. The thread (Consumer) trying to remove item from an empty queue waits or is blocked until the Producer thread adds an item to the queue.

Where is blocking queue used?

BlockingQueue take() method in Java with examples The take() method of BlockingQueue interface is used to retrieve and remove the head of this queue. If the queue is empty then it will wait until an element becomes available. This method is more efficient if working on threads and using BlockingQueue in that process.

What happens if blocking queue is full?

Here we have a blockingQueue that has a capacity equal to 10. It means that when a producer tries to add an element to an already full queue, depending on a method that was used to add it (offer(), add() or put()), it will block until space for inserting object becomes available. Otherwise, the operations will fail.

What kind of problems can be solved by using blocking queue?

The consumers halt consuming if the size of queue is 0 (empty) and resumes consuming once the queue has an element. Blocking Queue solves much of the problem of synchronization mechanism handled by wait() and notify() in producer-consumer problem. The blockingQueue has methods take() and put which uses java. util.

How is blocking queue implemented in Java?

Here is a simple implementation of a blocking queue:

1. public class BlockingQueue {
2. private List queue = new LinkedList();
3. private int limit = 10;
4. public BlockingQueue(int limit) {
5. this. limit = limit;
6. }
7. public synchronized void enqueue(Object item) throws InterruptedException {
8. while (this. queue. size() == this.

How does BlockingQueue solve producer-consumer problem?

BlockingQueue:

1. If a producer thread tries to put an element in a full BlockingQueue, it gets blocked and stays blocked until a consumer removes an element.
2. Similarly, if a consumer thread tries to take an element from an empty BlockingQueue, it gets blocked and remains blocked until a producer adds an element.

What is Producer-consumer relationship in Java?

There is one Producer in the producer-consumer problem, Producer is producing some items, whereas there is one Consumer that is consuming the items produced by the Producer. The same memory buffer is shared by both producers and consumers which is of fixed-size.

How is BlockingQueue implemented in Java?

What is a good use of a blocking queue?

3 Answers. A limited capacity BlockingQueue is also helpful if you want to throttle some sort of request. With an unbounded queue, a producers can get far ahead of the consumers.