Vert.x Simple Telnet Server - session management

snippet1.groovy

// this is the base directory where all user will be segregated (like: "chroot")
BASE_DIR = new File(System.properties.baseDir ?: "/tmp").canonicalPath;

// This map maintains the session state for every connection.
// for this telnet server the state will be limited to the current directory
_connections = [:];

// Connection id counter
_cids = 0;

// assigning an id to a new connection
def registerConnection() {
    String cid = "${++_cids}"
    _connections[cid] = [curDir: BASE_DIR]
    return cid;
}