RABBITMQ Learning Record-TTL

Send the monkeys to the reinforcements.The TTL of the queue itself

Note that the TTL of the queue itself is said here. It's not about the news.

When declaring a queue, you can specify the queue's TTL value with X-expires. After it expires, the queue is deleted.

No matter if there's any news, no spending.

#!/usr/bin/env python#-*-Coding:utf-8-*-" "the queue exists for only 5 seconds, whether there is messages!" "Import PikaImport SYSdef Main():    Body = "'.Join(SYS.argv[1:]) or ' Hello World '    Connection = Pika.blockingconnection(        Pika.connectionparameters(            Host=' localhost '))    Channel = Connection.Channel()    Channel.Queue_declare(Queue=' Ttlhello ',arguments={"X-expires": the}) # TTL 5 second    Channel.Basic_publish(Exchange="',                          Routing_key=' Ttlhello ',                          Body=Body,                          )    Connection.Close()if __name__ == ' __main__ ':    Main()

Run for a look at the effect

# python queueTTL.py ;sleep 1; rabbitmqctl list_queues; sleep 6;rabbitmqctl list_queues  Listing queues ...  ttlhello    1  Listing queues ...  

Per-queue Message TTL

This is also the property of the queue, not the message. All messages in the queue are deleted when the TTL is over.

#!/usr/bin/env python#-*-Coding:utf-8-*-" "The messages in the queue exist for only 5 seconds" "Import PikaImport SYSdef Main():    Body = "'.Join(SYS.argv[1:]) or ' Hello World '    Connection = Pika.blockingconnection(        Pika.connectionparameters(            Host=' localhost '))    Channel = Connection.Channel()    Channel.Queue_declare(Queue=' Ttlmessagehello ',arguments={"X-message-ttl": the}) # TTL 5 second    Channel.Basic_publish(Exchange="',                          Routing_key=' Ttlmessagehello ',                          Body=Body,                          )    Connection.Close()if __name__ == ' __main__ ':    Main()

Run for a look at the effect

# python queueMessageTTL.py; rabbitmqctl list_queues; sleep 6; rabbitmqctl list_queues  Listing queues ...  1  Listing queues ...  0  

Per-message TTL

When sending a message, you can also give each message a TTL attribute.

messagettlsend.py

#!/usr/bin/env python#-*-Coding:utf-8-*-Import PikaImport SYSdef Main():    Body = "'.Join(SYS.argv[1:]) or ' Hello World '    Connection = Pika.blockingconnection(        Pika.connectionparameters(            Host=' localhost '))    Channel = Connection.Channel()    Channel.Queue_declare(Queue=' Hello ')    Channel.Basic_publish(Exchange="',                          Routing_key=' Hello ',                          Body=Body,                          Properties=Pika.basicproperties(                              Expiration=" the"                             )                          )    Connection.Close()if __name__ == ' __main__ ':    Main()

Run for a look at the effect

# python messageTTLSend.py; rabbitmqctl list_queues; sleep 6; rabbitmqctl list_queues;  Listing queues ...  hello   1  Listing queues ...  hello   0  

Finally, as Per-message ttl and Per-queue message ttl are not the same, press small.

RABBITMQ Learning Record-TTL