Chat server and client in Java using non-blocking sockets.
Code organization
Network layer is defined through Server, Connection and ConnectionEvent classes. The Server is assumed to
put new connections and events related to connections to queues, which will be read and processed by another
threads (server logic classes). The provided implementation relies on java.nio.
The chat logic is implemented in ConnectionAcceptor and ConnectionProcessor classes which process the aforementioned
queues. The class Chat is responsible for creating the queues and binding them to server and processor classes.
Chat logic is implementing using Message and Command objects. Message is used to represent different kinds of
messages. The method getBytes() does serialization of message to bytes so it can be written to a connection. The
messages are read and constructed from bytes using ChatMessageBuffer and MessageFactory classes. The class
Command represents commands to the server passed from a user from a chat message. It is organized in a similar
manner as Message objects.
Client is configurable with InputSystem and DisplaySystem, which in theory should allow to use Client in
different GUI settings or use it for a chat bot.
Building and running
Maven build system is used, so you can execute different maven goals as mvn goal. To start a demo server on
localhost:5000 and clients execute the following in the root of this repository:
mvn package
java -cp target/chat-0.1-jar-with-dependencies.jar nmayorov/app/StartDemoServer
# And in another shell
java -cp target/chat-0.1-jar-with-dependencies.jar nmayorov/app/StartDemoClient
# And another client in another shell
java -cp target/chat-0.1-jar-with-dependencies.jar nmayorov/app/StartDemoClient
...
To start a server and connect a bunch of bots to it:
mvn package
java -cp target/chat-0.1-jar-with-dependencies.jar nmayorov/app/StartDemoServer
# In another shell
java -cp target/chat-0.1-jar-with-dependencies.jar nmayorov/app/StartLoadTest [number of bots]
If [number of bots] is not provided, 100 will be used.