Talk about rocketmq's updateTopicRouteInfoFromNameServer

order This paper focuses on rocketmq's updateTopicRouteInfoFromNameServer updateTopicRouteInfoFromNameServer rocketmq-client-4.5.2-sources.jar!/org/apache/rocketmq/client/impl/factory/MQClientInstance.java public class MQClientInstance { private final static long LOCK_TIMEOUT_MILLIS = 3000; private final InternalLogger log = ClientLogge ...

Posted on Fri, 06 Dec 2019 21:32:13 -0500 by vurentjie

Spring MVC monitors the upload progress of files and realizes the upload progress bar

First of all, Spring is a very mature J2EE framework, its non intrusive architecture provides the greatest possibility for system integration and expansion. So it's very easy to implement progress monitoring in Spring MVC, even without changing the previous upload business code. The specific implementation is divided into three ste ...

Posted on Fri, 06 Dec 2019 20:55:36 -0500 by D1proball

Project practice: Leyou mall-01 - background project construction and testing

The basic structure and functions of the project are as shown in the following figure. Here, maven is used to build the project, and then dependency is imported manually. The purpose of not using spring initializer to create the project quickly is to make the project more manageable without less fancy dependency The following are pom.xml and a ...

Posted on Fri, 06 Dec 2019 18:24:51 -0500 by Neotropic

SpingBoot -- scene starter

The init project hello SpringBoot! Does not run without importing the related jar packages such as spring core spring web spring webmvc. Instead, these jar packages are divided into different scenarios according to the application, which are automatically imported by the scenario initiator management. The above jar packages incl ...

Posted on Fri, 06 Dec 2019 16:30:20 -0500 by benracer

Under IDEA -- Spring starter

Create a Maven project. My project structure is as follows: Write down the dependency to be imported in the pom file: <?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/PO ...

Posted on Fri, 06 Dec 2019 15:28:20 -0500 by ganeshcp

zookeeper (10) source code analysis - event monitoring Watcher

Today, we will continue to analyze the source code, and analyze the WatchManager class under org.apache.zookeeper.server. The WatcherManager class is used to manage watchers and the corresponding triggers. Class properties //watchTable represents the mapping from node path to watcher set private final HashMap<String, HashSet<Watcher& ...

Posted on Fri, 06 Dec 2019 10:32:11 -0500 by thefreebielife

Java's new project learning online notes - day4(2)

3.2.1.3 Dao Define the dao interface of CmsCon? g: public interface CmsConfigRepository extends MongoRepository<CmsConfig,String> { } 3.2.1.4 Service Define the CmsCon? gService implementation to query the CmsCon? g information according to the id. @Service public class CmsConfigService { @Autowired CmsConfigRepository cmsConfi ...

Posted on Fri, 06 Dec 2019 09:37:15 -0500 by bobocheez

spring security permission control

There are two ways to control the permission of spring security: one is to compare whether the current request url and the permission of the current user contain the url; The other is to use @ PreAuthorize("hasAuthority('XXX ')) annotation, where XXX can be role or any permission identifier, which is a string type 1) way of annotation Y ...

Posted on Fri, 06 Dec 2019 06:30:27 -0500 by tomato

python concurrent server for connecting multi process, multi thread and single process

Connection oriented concurrent server def main(): # 1. Create socket socket tcp_server = socket(AF_INET, SOCK_STREAM) # 2. Bind IP address and port tcp_server.bind(("", 8888)) # 3. Change the active mode to the passive mode, and only receive and not send data tcp_server.listen(5) while True: # 4. ...

Posted on Fri, 06 Dec 2019 04:07:40 -0500 by theprofession

Talk about the pullFromWhichNodeTable of rocketmq

order This paper mainly studies the pullFromWhichNodeTable of rocketmq pullFromWhichNodeTable rocketmq-all-4.6.0-source-release/client/src/main/java/org/apache/rocketmq/client/impl/consumer/PullAPIWrapper.java public class PullAPIWrapper { private final InternalLogger log = ClientLogger.getLog(); private final MQClientInstance mQClientF ...

Posted on Fri, 06 Dec 2019 03:42:44 -0500 by tlenker09