Server processing for an individual client request. When the voter supplies an election name, the client code makes a TCP connection to the server. The server instantiates a Worker thread that processes client's request. <br/><br/> The worker thread expects to get a request for the candidates in an election, for which it returns the list of candidates. Then it expects a vote for the election, which it processes and then acknowledges. Any deviation from the expected message format, or invalid message contents (closed election, etc) results in an error reply being sent. <br/><br/> All the operations on elections are done by calling methods on the <code cref="Election">Election</code> member variable, which is set at thread initialisation time. The server handles concurrency control between multiple workers at the level of individual elections.