public void execute()

in core/src/main/java/org/apache/ftpserver/command/impl/SITE_WHO.java [53:103]
39 lines of code
5 McCabe index (conditional complexity)

    public void execute(final FtpIoSession session,
            final FtpServerContext context, final FtpRequest request)
            throws IOException, FtpException {

        // reset state variables
        session.resetState();

        // only administrator can execute this
        UserManager userManager = context.getUserManager();
        boolean isAdmin = userManager.isAdmin(session.getUser().getName());
        if (!isAdmin) {
            session.write(LocalizedFtpReply.translate(session, request, context,
                    FtpReply.REPLY_530_NOT_LOGGED_IN, "SITE", null));
            return;
        }

        // print all the connected user information
        StringBuilder sb = new StringBuilder();

        Map<Long, IoSession> sessions = session.getService()
                .getManagedSessions();

        sb.append('\n');
        Iterator<IoSession> sessionIterator = sessions.values().iterator();

        while (sessionIterator.hasNext()) {
            FtpIoSession managedSession = new FtpIoSession(sessionIterator
                    .next(), context);

            if (!managedSession.isLoggedIn()) {
                continue;
            }

            User tmpUsr = managedSession.getUser();
            sb.append(StringUtils.pad(tmpUsr.getName(), ' ', true, 16));

            if (managedSession.getRemoteAddress() instanceof InetSocketAddress) {
                sb.append(StringUtils.pad(((InetSocketAddress) managedSession
                        .getRemoteAddress()).getAddress().getHostAddress(),
                        ' ', true, 16));
            }
            sb.append(StringUtils.pad(DateUtils.getISO8601Date(managedSession
                    .getLoginTime().getTime()), ' ', true, 20));
            sb.append(StringUtils.pad(DateUtils.getISO8601Date(managedSession
                    .getLastAccessTime().getTime()), ' ', true, 20));
            sb.append('\n');
        }
        sb.append('\n');
        session.write(new DefaultFtpReply(FtpReply.REPLY_200_COMMAND_OKAY, sb
                .toString()));
    }