Multi Chat JAVA

Technical documentation

This Java APP is to make a CHAT with multiple users. We use ServerSocket class and Socket to make the connection. the use a Worker to handle multiple connections. We use Logback Classic & core module. Apache Commons Lang for implement login and logoff commands.

Develop process

1. Create chat Server. handle multiple connections.
2. Handling User Presence (Online & Offline Status)

Protocols develop

We have User & Server for use the chat.

1. User communicate to Server

   • user can log or logoff
   • status of the user

2. The Server communicate to User

   • communicate to other user come online or offline

3. Users communicate to another Users

   • users can send direct messages to other users
   • users can send group messages (the groups messages work with a #)
   • users can broadcast messages

Commands that use for login or logoff:

login <user> <password>
logoff

msg <user> body....
guest: "msg jim Hello World" <--- sent
jim: "msg guest Hello World" <--- recv


#topic <--- chatroom / group chat 
join #topic
leave #topic
send msg #topic body---
recive msg #topic:<login> body ...

Related Articles

Libraries that we use

Commons Lang https://commons.apache.org/proper/commons-lang/

Java Class

ServerSocket https://docs.oracle.com/javase/8/docs/api/java/net/ServerSocket.html Socket https://docs.oracle.com/javase/8/docs/api/java/net/Socket.html