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stay Last article In this article, we will implement the basic function of adding chat, but we haven't shown the new chat in the chat list yet. We will show all chats in the chat list. First, we create a new group_chat_list_body.dart file in the / lib directory. Write a stateful control GroupChatListBody in group_chat_list_body.dart, pass two ...

The function of sending short messages is indispensable for an APP that needs channel expansion. However, when I first saw this demand, I was confused, because I had not met before, out of fear of the unknown, when I was assigned to do this task, I actually refused, but there is no way to let me be a soldier, can only be tough on the scalp. Aft ...

From: https://www.cnblogs.com/ityouknow/p/5714703.html Using the command of JVM can help us locate the problem easily in production monitoring and printing the log information of stack. Although there are many mature tools for JVM tuning: jconsole, famous Visual VM, IBM's Memory Analyzer and so on, when problems arise in the production environ ...

1. Connect to CentOS 7 server with Linux client tools such as SecureCRT or XShell. Enter into the / usr/local/tools directory: cd /usr/local/ If this directory is not available, create: mkdir -p tools 3 Download zookeeper-3.4.8.tar.gz: wget http://apache.fayea.com/zookeeper/zookeeper-3.4.8/zookeeper-3.4.8.tar.gz 4 Return to the previous d ...

Address planning: kvm112: 192.168.5.112 kvm113: 192.168.5.113 nfs101: 192.168.5.101 The experimental steps are as follows: Deploying kvm environments on 112 and 113, Create a virtual machine vm1 locally at 112. Create a snapshot named first for vm1. Publish shared directories on 101. Create nfs-based storage pool on ...

Recently, a problem happened to the customer project. The requirement of the project is to obtain the real-time state of a machine tool. The point of the problem is that the machine is not a traditional CNC machine tool or a PLC controller. There is only an application program for uploading and downloading program files. There are just a few bu ...

Git git core concepts and introductory details What is git? Git is a distributed version control software, originally created by Linus Torvaz and released in GPL in 2005. The original goal was to better manage Linux kernel development. It should be noted that this is different from GNU Interactive Tools, a file manager similar to the Norton Com ...

[TOC] 1. Steps to generate AWE reports For SQL tuning, local SQL, we can use direct tuning such as execution plan, for the whole system?Oracle provides several performance analysis reports, such as AWR, ASH, ADDM and so on. This blog focuses on AWR AWR, fully known as Automatic Workload Repository, is a performance collection and a ...

square-gopher.png Http requests are a stateless communication model that may sound confusing to beginners.Statelessness here means that each request is independent and independent of each other.Each request is not affected by the last request. Provide two components in the net/http module to handle Http requests. golang_ ...

Redis Learning Cluster Preface In the first place, we learned the basic operation of Redis, the use of Jedis and the persistence scheme of Redis. Next, we learned the cluster management of Redis. copy When data is stored on a server, if the server hangs up, the data will be lost, so Redis provides the function of replicati ...