what is the difference between the blocking message queue implemented with jedis s BRPOP and BLPOP and the publish subscribe system implemented using jedis s subscribe and publish , and how to choose? ...
< H1 > problem description < H1 > I use the hash table to represent the people on the seat (key represents the seat position, value is the specific uid), and then use hsetnx to process the concurrent seat. but there is a problem that, after the seat ...
MQTT (: Message Queuing Telemetry Transport (message queuing Telemetry Transport Protocol) message queuing (MQ): is used for asynchronous processing, application decoupling, traffic trimming, and so on. so I have the following questions: 1:mqtt "me...
there are currently thousands of messages stored in mq. Integrated into the project, after each startup, only 2 pieces of consume can be dropped, and it will not be consumed automatically. But to bring out the consumer alone and become a pure to the pro...
when using the Rocketmq queue service, the server sees that the log has been started successfully, but the above error is thrown when the code called by the official client is executed. I use version 4.3.0 of Rocketmq. The following is the code called b...
use PHP multiprocess to listen on multiple rabbitmq queues (php-amqplib used) 2 30 2 0sleep 1 1sleep 2 2 it seems that you have to wait for the main process to generate three child processes and let three child processes execute at the same ...
I want to link to rabbitmq in workman! When a message is received, it is forwarded to the websocket client I don t know whether it will work or not! ...
I set up a kafka service in the virtual machine of my computer and use the Java client to access it locally. Now if the service on the virtual machine is turned off by me, my local code will not be able to push messages to kafka and will report a timeou...
would you like to know if rabbitmq supports distributed transaction messages? rocketmq4.3 begins to support distributed transaction messages. what is the general mechanism if rabbitmq does not support transaction messages? ...
this article https: blog.csdn.net chunlon.: failed to send a message to the message middleware. Does the sender not know that the message middleware really did not receive the message? Or has the message been received, but failed to return response?...
compared with mq, redis subscription publication has many disadvantages, such as no guarantee that messages must be reached. however, redis subscription publications can certainly have their own advantages. For example, redis publish subscriptions can ...
because it seems that messages will be consumed according to priority only when consumers have unack. I feel that message priority is a very chicken-rib function. I don t know where it can be applied? ...
when using php-amqplib to operate rabbitmq, it is found that basic_qos has three parameters prefetch_size prefetch_count global global and prefetch_count roughly understand the meaning of these two parameters but the meaning of the first parameter,...
both front and rear ports are deployed on my computer, only the port number is different. The vuecli, used in the front end uses its own proxytable setting across domains, but when ajax sends the request, it does not change the port number, and the stat...
want to extract continuous Chinese characters + punctuation in html, ask how to write regular ...
recently I saw a piece of js code in the source code of WeChat Mini Programs, but I couldn t figure out what it meant. The code is as follows: if (console.log(a), void 0 !== a.bet) return wx.showToast({ title: "title", ...
I want to climb a website with about 1 billion data. Url is http: xxx.com id=xx accesses and extracts the data and stores it in the database . where the id parameter in url is predictable, ranging from 0 to 1000000000 so I can generate these 1 bill...
my console.log () is in index.component.ts, but the print information I see in chrome is located in main.js and cannot be specifically located in a component ...