import org.jivesoftware.smackx.packet.Time; //导入依赖的package包/类
/**
 * Starts the throttle test reader client.
 *
 * @param args application arguments.
 */
public static void main(String [] args) {
    if (args.length != 3) {
        System.out.println("Usage: java ThrottleTestReader [server] [username] [password]");
        System.exit(0);
    }
    String server = args[0];
    String username = args[1];
    String password = args[2];
    try {
        // Connect to the server, without TLS encryption.
        ConnectionConfiguration config = new ConnectionConfiguration(server);
        config.setSecurityMode(ConnectionConfiguration.SecurityMode.disabled);
        final XMPPConnection con = new XMPPConnection(config);
        System.out.print("Connecting to " + server + "... ");
        con.connect();

        con.login(username, password, "reader");
        System.out.print("success.");
        System.out.println("");

        // Get the "real" server address.
        server = con.getServiceName();

        final String writerAddress = username + "@" + server + "/writer";
        String readerAddress = username + "@" + server + "/reader";

        System.out.println("Registered as " + readerAddress);

        // Look for the reader process.
        System.out.print("Waiting for " + writerAddress + "...");
        PacketCollector collector = con.createPacketCollector(new AndFilter(
                new FromMatchesFilter(writerAddress), new PacketTypeFilter(Time.class)));
        Time timeRequest = (Time)collector.nextResult();
        Time timeReply = new Time(Calendar.getInstance());
        timeReply.setPacketID(timeRequest.getPacketID());
        timeReply.setType(IQ.Type.RESULT);
        timeReply.setTo(timeRequest.getFrom());
        con.sendPacket(timeReply);
        System.out.println(" found writer. Now in reading mode.");

        // Track how many packets we've read.
        con.addPacketListener(new PacketListener() {

            public void processPacket(Packet packet) {
                packetCount.getAndIncrement();
            }
        }, new PacketTypeFilter(Message.class));

        while (!done) {
            Thread.sleep(5000);
            int count = packetCount.getAndSet(0);
            System.out.println("Packets per second: " + (count/5));
        }

        // Sleep while we're reading packets.
        Thread.sleep(Integer.MAX_VALUE);
    }
    catch (Exception e) {
        System.out.println("\nError: " + e.getMessage());
    }
}