How to Implement Producer/Consumer Threads with a Queue?

Producer/Consumer Threads with a Queue

To establish producer/consumer threading with a queue, there are two primary components: executor services and, if necessary, a blocking queue.

Executor Services

Begin by placing all producers in one executor service and all consumers in another.

Blocking Queue

If communication between the services is necessary, utilize a blocking queue. For instance:

final ExecutorService producers = Executors.newFixedThreadPool(100);
final ExecutorService consumers = Executors.newFixedThreadPool(100);
while (/* has more work */) {
  producers.submit(...);
}
producers.shutdown();
producers.awaitTermination(Long.MAX_VALUE, TimeUnit.NANOSECONDS);
consumers.shutdown();
consumers.awaitTermination(Long.MAX_VALUE, TimeUnit.NANOSECONDS);

Implementation Considerations

Producer threads submit tasks directly to consumer threads, rather than using a separate blocking queue for communication. This approach simplifies implementation while maintaining concurrency and efficiency.

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