Major optimization of openim - Message loading on demand, consistent cache, uniapp Publishing

Introduction to new functions
（1） The server adds consistency cache （dtm:https://www.dtm.pub/）, Optimize db Read and write performance ;

（2） For group read diffusion Group , Sync the latest when logging in 100 Bar message , Historical messages are loaded on demand ;

（3） When applying to join the Group , The group leader or administrator can see the way to join the group and who invites to join the Group ;

（4） The dissolution of , No more messages can be sent ;

（5） Friend notes can be deleted , Restore the original name after deletion ;

（6） Group owners and administrators can see the way group members enter the Group ： Scan code into group , Who invited to join the Group , Search into groups ;

（7） Group owners and administrators set group member permissions ： Is it allowed to view the information of other group members ; Whether to allow adding group members and friends ;

Technical friends should be familiar with read-write diffusion , Whether it's information flow 、 Forum 、 mail , Or private chat 、 Group chat 、 notice , Can use read-write diffusion . This article does not explain the technical details ,OpenIM The read diffusion based on push-pull combination mainly solves the redundant storage of messages in the group chat mode , Message real time , New users cannot view new messages after joining the Group , Super large group, etc .

Andrews experience ：https://www.pgyer.com/OpenIM

Group chat and reading spread - Load on demand
（1） Specify the workgroup when creating , This group uses the read diffusion model , Each group has its own seq, Group members share this seq, It can greatly reduce the redundancy of group messages , And improve the real-time performance of messages .

（2） The message on-demand loading mechanism paves the way , For the scenario of not logging in for a long time or reloading after uninstallation , Load the latest by default 100 Bar message , For historical messages , If the local db non-existent , Pull from the server .

（3） New users can view historical messages when joining the Group , Add options later , Give developers more options .

uniapp edition demo Release
uniapp, long-awaited ,demo The published , There may be some flaws , Please forgive me a lot .

Please go to github Download the use ：https://github.com/OpenIMSDK/Open-IM-Uniapp-Demo

Project results
From the server to the client SDK Open source instant messaging （IM） Overall solution , Can easily replace third parties IM The cloud service , And can be highly customized and redeveloped according to business needs , Create a chat 、 social contact 、 Office function app.OpenIM Continue to lead open source IM field , With the strong support of developers , at present github star Keep breaking through . More and more developers put OpenIM Applied in Social , Collaborative office . In the process of operation, some of the code has also been exposed and repaired bug, Due to the wide range of use scenarios ,OpenIM More and more robust , The value of open source is also highlighted . Especially for the government system , Open source products have more advantages of access conditions .“ Open source ” Its value lies in breaking the monopoly of resources , Let developers You can control yourself .“ Open source ” The value of is to improve the quality of software , Optimizing system architecture .“ Open source ” Its value lies in enriching cultural connotation , Co build engineer culture .

Open source is more than just open source . As open source IM The leader ,OpenIM Open source has several purposes ：（1）IM Core data should be in the hands of operators （2）IM Wide demand , Many people use it for free , And find problems （3） Let more developers participate in the project , especially IM There are many demands . In the open source community , Every project can be opened pr,pr The function will allow every developer to modify the code , But you need the merge code of the project owner . The collective power is the greatest , Fully reflect the value of open source .OpenIM Community operation is deficient , In the future, we plan to live broadcast and explain the technical architecture , Let community developers deeply participate in the development .

github Address ：https://github.com/OpenIMSDK/Open-IM-Server

Developer center ：https://doc.rentsoft.cn/#/

Our team
OpenIM By IM Technical experts build open source instant messaging components , at present github The community is active ,star Nearly 10000 , It's way ahead of the League , developer 7000 people ,OpenM Strive for open source IM project No1, Create open source IM The first community . Support Android、iOS Native development , Support Flutter、uni-app Cross end development , Support for applets 、React All mainstream web Front end technology framework , PC Support Electron. It is mainly used in government affairs , social contact ,web3 scene , Everything is controllable , Give Way OpenIM Go deep into all industries . From the internal meaning of open source , These five dimensions are needed ： transparency ; Collaboration ; Continuous release ; Elite system ; Community operations ,OpenIM In these five aspects, we still need to make continuous efforts , Stabilize ecological construction , To consolidate OpenIM influence . The value of open source is open use , There is no limit to the space for imagination and development , Efficient use of . Each developer's imagination and starting point for products and technologies are different , This creates a most basic form into a hundred flowers in full bloom , The effect of competition .