plex subscription

ROS Learning (III)-create a simple release node and subscription node, ros Node Summer vacation at home is a little slack, no, very slack--|! My conscience hurts and I want to make up the progress. But I suddenly find that I have been interrupted for a while, and I have forgotten some of the most basic symbols. This time, we made a very basic task, restoring the previous progress. 1. Create a workspace $ mkdir -p ~/catkin_xi/src$ cd ~/catkin_xi/src

Redis provides us with the Publish/subscribe (Publish/subscribe) feature. We can subscribe a channel (a subscription), and Redis notifies us when someone publish a message on the channel so we can get a message from someone else.As a Redis client for Java, Jedis provides an interface for Publish/subscribe. This article describes how to use Jedis to implement Publish/subscribe for Redis. Defining the Subscriber ClassJedis defines an abstract class, in

Both Redis and NSQ have well-developed subscription and release implementations, but refer to their source code implementations to make a practical example of the similarities and differences between the two sides and the mechanism will be more impressive.Practice implementing a simple subscribe/unsubscribe/release information feature is sufficient.Server.goThe dict in the server structure uses a map to store information about the channel, while the c

Rabbit get the message by way: The subscription is actually registered to the queue consumer, through RPC to the queue server to send the registration consumer message, RabbitMQ server after receiving the message, This is a subscription message based on the content type of the message, which automatically sends the message through the socket (long connection) channel when the queue in MQ has a message.can b

: This article mainly introduces the release and subscription of redis. For more information about PHP tutorials, see. Environment: Windows 10, with redis installed 1. Command Line Edition Open the Directory, switch to redis-cli.exe, the directory should have redis-cli.exe, redis-server.exe, redis. conf and other files. Enable the local redis service: execute redis-server.exe redis. conf to start the redis service. Connect the client to the redis ser

NETMQ (ZeroMQ to. Net), ØMQ claims to be the fastest middleware in history. It encapsulates the socket communication so that we do not need to write the socket function call to complete complex network communication. Unlike Message Queuing products in general, it does not have a Message Queuing server and is more like a network communication library. From the point of view of network communication, it is above the session layer and under the application layer. "ZeroMQ official website":http://ze

I am developing a voting system and need to identify the number of user votes based on the user's openid. Problem: I can get the openid through the public account subscription and click events, and then I will save the openid to the cookie or session immediately. Then, when other webpages are opened, this cookie or... I am developing a voting system and need to identify the number of user votes based on the user's openid. Problem: I can get the openid

Ubuntu 14.04/12.04 users install the subscription software Liferea1.10.10 Liferea (Linux feed reader) is a simple and lightweight news and information subscription software. In addition to subscribing to website information, other functions can be synchronized with tinytinyrss or theoldreader, and have all the functions of Google subscription (stopped service),

First, using the array cache Subscriber subscription message, when the Subscriber subscribes to the message, push the subscription message to the queue of the specified message, and when the publisher publishes the message, we traverse the execution push to the specified message queue for the callback event.varPubsub= (function(){ vareventobj={}; return{subscribe:function(EVENT,FN) {eventobj[event]=fn},

Redis provides us with the Publish/subscribe (Publish/subscribe) feature. We can subscribe a channel (a subscription), and Redis notifies us when someone publish a message on the channel so we can get a message from someone else.As a Redis client for Java, Jedis provides an interface for Publish/subscribe. This article describes how to use Jedis to implement Publish/subscribe for Redis.Define aSubscriberClassJedis defines an abstract class, in which t

Python3.3 returns encoder information in byte type, b ' ... ', using byte type to find encoder dataPython2.7 returns the encoder information as a string type ' ... ', using a string to find the encoder dataYou can use the type to detect the function type (...). ) to determine the data type of the Read encoder information:One subscription calls callback multiple times: Rospy.spin () is used at the end of a subscrip