How to set the redis queue

The steps to set up a queue in Redis include: 1. Create a list; 2. Push items into the queue; 3. Eject items from the queue; 4. Get the queue length; 5. Block pop-up; 6. Block enqueue; 7. Delete the queue.

How to set Redis queue

A Redis queue is a data structure that stores and retrieves messages in a first-in-first-out (FIFO) order in Redis. To set up a Redis queue, follow these steps:

1. Create a list/queue

Create a list (Redis queue) using the following command:

 <code>LPUSH my_list item1 item2 item3</code>

Where, my_list is the name of the queue, and the following parameters are the items in the queue.

2. Push items into queue

To push an item into a queue, use the LPUSH command to add the item to the beginning of the list:

 <code>LPUSH my_list new_item</code>

3. Pop up an item from the queue

To pop an item from the queue, use the RPOP command, which will return and delete the last item in the list:

 <code>RPOP my_list</code>

4. Get the queue length

To get the number of items in the queue, use the LLEN command:

 <code>LLEN my_list</code>

5. Blocking pop-up (BRPOP)

If there are no items in the queue, the RPOP command will return nil . Instead, you can block using the BRPOP command until an item appears in the queue:

 <code>BRPOP my_list 0</code>

Among them, 0 means infinite waiting.

6. Blocking Entry (BLPOP)

Similarly, you can block using the BLPOP command until there is room in the queue to push new items:

 <code>BLPOP my_list 0</code>

7. Delete the queue

To delete a queue, use the DEL command:

 <code>DEL my_list</code>

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