Programmer Think

This project is built by using spring cloud. You need to pay attention to the version when integrating with nacos. Otherwise, you may refresh the configuration when you restart the project, and it cannot be hot updated. The following is the version map: First of all, Download Nacos server, and don't attach the project address of github her ...

Guva is an open-source public java library of google, similar to Apache Commons. It provides a collection, reflection, caching, scientific computing, xml, io and other tool class libraries.Cache is just one of the modules. Using Guva cache can build local cache conveniently and quickly. [TOC] Building the first cache using Guava First, we need ...

A Flink program for Kafka data consumption, the Flinon Yarn model, was released in the test and production environments before. It was normal and had no problems. However, after restarting the test environment, it was redistributed again. The error was reported as follows: 2019-07-01 15:19:25,984 INFO ...

I use httpclient-4.5.1.jar. If the version of httpclient is too low, this method may not be used. It needs to set cookie manually. That method, not discussed for the moment, is mainly to get the returned cookie when landing, and then to fill the value of coolie in the new request header. However, this m ...

Said ahead Management request GET_EARLIEST_MSG_STORETIME for the storage time of the earliest message Source code analysis Enter the method org.apache.rocketmq.broker.processor.AdminBrokerProcessor#getEarliestMsgStoretime to get the storage time of the earliest messages private RemotingCommand getEarlie ...

Spring-boot hot deploymentWay 1 Spring loader plug-in: 1. Adding Dependency on pom.xml to New maven Project <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/POM/4.0.0 http://maven.apache.org/xsd/maven- ...

I. analysis. From last article Day3_JDBC - Encapsulation of Addition, Deletion and Change Checks (BaseDao class) using DBUtils third-party tools As you can see, every method in the BaseDao class needs to pass in a type of entity class (that is, JavaBean type). If we inherit the BaseDao class, we tell ...

Background Ali's RicketMQ has been castrated in previous versions and re-added in the new version to solve the problem that small companies are unable to make reliable messaging middleware products. At the same time, RocketMQ also refers to the Kafka implementation, and its performance is very good. Version 2 <dependency> <groupId& ...

Before modification After modification 6.0 Recovery Mode Horizontal Screen Modification Method Modification of relevant documentsbootable\recovery\minui\Android.mkbootable\recovery\minui\mt_graphic_rotate.cppbootable\recovery\minui\mt_graphic_rotate.hbootable\recovery\minui\graphics_fbdev.cppbootable\recovery\minui\minui.h 1. Add mt_graphic_r ...

order This article mainly studies dubbo's Connection Ordered Dispatcher. ConnectionOrderedDispatcher dubbo-2.7.3/dubbo-remoting/dubbo-remoting-api/src/main/java/org/apache/dubbo/remoting/transport/dispatcher/connection/ConnectionOrderedDispatcher.java public class ConnectionOrderedDispatcher implements Dispatcher { public static final Stri ...