ConcurrentLinkedQueue有什么用？

Question

I am working in bluetooth in android kotlin. I found this blessed library and this class BluetoothPeripheral is using ConcurrentLinkedQueue . I don't understand what is the use of

private val commandQueue: Queue<Runnable> = ConcurrentLinkedQueue()

I am looking this enqueue function and I cannot understand the use case in here. what the author trying to achieved in here?

This enqueue function calls in different place ie readCharacteristic what is the use case in this function?

Thanks

Answer 1

Building on @broot's comment:

1. ConcurrentLinkedQueue is part of the java.util.concurrent package which is all about collections that are thread-safe
2. A Queue is a kind of collection that is designed for efficient adding and removal. Typically they offer First In First Out.
3. If you have an application that is dealing with a high throughput of tasks, producers put items in a queue and consumers take them. Depending which is faster, you may have more producer threads than consumer threads, or the other way around. You achieve process isolation by using a thread-safe queue, such as ConcurrentLinkedQueue
4. Some Queue implementations have bounded capacity, but a queue like ConcurrentLinkedQueue is based on a Linked List so typically have have far greater capacity, but mean that some operations, such as search might perform less well.
5. There is also a Dequeue which is a Queue that you can remove items easily from both ends.

I have no idea what the Bluetooth application is about and why it needs ConcurrentLinkedQueue so I cannot comment on whether it is the "best options to use in bluetooth case"