Internet of Things Devices
Wait and so on
Haikang camera, vehicle identification and other equipment
Red Gate Gate
Principle: Use JNI or JNA technology of java to invoke c driver to realize docking of device data.Distinguish deployment platforms ...
Posted on Sun, 05 Apr 2020 13:48:41 -0700 by romilbm
Consider a functional business that communicates in real time to a specified user in a web program
In the Socket communication functions used by the Web (e.g. online customer service), to ensure peer-to-peer communication, this seemingly simple channel will actually encounter a lot of problems based on the user finding the channel
Posted on Tue, 10 Mar 2020 09:55:26 -0700 by EPCtech
1, On the way of realization
1. Receive the 0x9101 command (real-time audio and video transmission request) issued by the platform
2. Analyze the 0x9101 command and get the IP and port number of the audio and video upload data server
3. Start to acquire each frame of video data of the device camera. ...
Posted on Fri, 06 Mar 2020 23:34:52 -0800 by suma237
BIO is a synchronous blocking mode. As long as there is a client access, the server will have a thread corresponding to it to communicate
Before, a common practice was to start a thread on the server to listen. When the supervisor heard that the client was connected, a new thread was set up to communicate with the client specially. If the t ...
Posted on Sun, 01 Mar 2020 00:15:37 -0800 by asukla
Spring, Netty, Mybatis and other frameworks use a lot of Java multithreading techniques. Whether the concurrent programming process is appropriate or not will directly affect the performance of the architecture. In this chapter, through the analysis of the source code of these frameworks, combined with ...
Posted on Sat, 22 Feb 2020 20:14:30 -0800 by dave_55
In network transmission, how to ensure the availability of channel connection is a very important issue. Simply put, in network communication, there are clients and servers, one is responsible for sending requests, the other is responsible for receiving requests. In the context of ensuring the validity of connection, what role do these two obje ...
Posted on Wed, 19 Feb 2020 10:18:30 -0800 by B-truE
In the first two versions, a new channel connection for netty is created every time a request is made, which wastes resources in high concurrency. It is important to implement asynchronous requests when there are multiple request threads, and a thread pool needs to be designed to manage them.In addition, the current method relies too much on th ...
Posted on Wed, 19 Feb 2020 09:06:19 -0800 by Markx
When it comes to distributed systems, we have to say centralized systems. In the traditional centralized system, everything in the whole project is in one application. A website is an application. When the system is under great pressure, it can only expand horizontally, add multiple servers or ...
Posted on Sun, 16 Feb 2020 00:26:05 -0800 by scottchr226
As we all know, the life cycle method of Master is: constructor - > onStart - > receive * - > onstop; but there is no direct call to onStart in Master's main method, so when is the onStart method called?
This is actually related to the underlying Netty communication architecture of Spark.
In th ...
Posted on Fri, 07 Feb 2020 08:25:08 -0800 by jib
If you forget how to enter the method, please go back newChild chapter
// Check I/O Events
// Handle the I/O events found by select above
// Run the event set processed above
Posted on Fri, 31 Jan 2020 13:08:43 -0800 by SuprSpy79