SpeakEasy | A free , open source , Java chat client

SpeakEasy is a Java library. SpeakEasy has no bugs, it has no vulnerabilities, it has a Strong Copyleft License and it has low support. However SpeakEasy build file is not available. You can download it from GitHub.

The code is contained in a set of Server classes, and a set of Client classes, which handle the server side, and client side services of the chat program respectively. The server side classes include Server.java and ServerThread.java. Server.java is the driver class of the server-side of the chat program. It is responsible for booting up the server-side of the program, establishing socket connections with clients, creating and starting new ServerThread instances, connecting those threads with each incoming client, and maintaining the program-wide data structures that allow separate ServerThread communication, maintaining a list of blocked clients, etc. When a Server object is instantiated, it can be instantiated with just a port number, or it can be instantiated with a port number and with various constant Long values that determine the length of time that a client is blocked, the length of time before a client times out from inactivity, etc. The values of these constants can also be given at the command line, and more will be discussed on them later. ServerThread.java is the class of the program that is responsible for communicating with one specific client. In this communication, the ServerThread is responsible for processing a client's input, for sending messages to a client, for authenticating a client, and for connecting to and disconnecting from a client. Client.java is the driver class of the client-side of the chat program. It is responsible for booting up the client-side of the program, and must be run AFTER the server is running. Furthermore, it must be run on the same port as a server-side of the program. A Client instance is also responsible for establishing a connection with, and disconnecting from, the server, and instantiating the ClientReaderThread, and ClientWriterThread, for reading from, and writing to, the server respectively. ClientReaderThread.java is the class of the program that is responsible for reading input from the server. It is implemented as a thread to account for the fact that a client may receive input from a server at any time, and not only after sending a command to the server. ClientWriterThread.java is the class of the program that is responsible for writing output/commands to the sever. For essentially the same reason as ClientReaderThread.java, ClientWriterThread.java is implemented as a thread to account for the fact that a client may receive input from a server at any time, and not only after sending a command to the server.