/src/test/java/com/rabbitmq/messagepatterns/unicast/UnicastClient.java

  1package com.rabbitmq.messagepatterns.unicast;
  2
  3import com.rabbitmq.client.ConnectionFactory;
  4import com.rabbitmq.client.Channel;
  5import com.rabbitmq.client.Connection;
  6
  7import java.util.HashSet;
  8import java.util.Set;
  9import java.io.IOException;
 10
 11public class UnicastClient {
 12
 13    public static void main(String[] args) throws Exception {
 14        UnicastClient c = new UnicastClient();
 15        c.run(args[0], args[1], Integer.parseInt(args[2]));
 16    }
 17
 18    Set pending = new HashSet();
 19
 20    int sent; //requests sent
 21    int recv; //requests received
 22    int pend; //pending requests
 23    int disc; //replies discarded
 24
 25    UnicastClient() {
 26    }
 27
 28    MessageSentListener listener = new MessageSentListener() {
 29        public void messageSent(Message msg) {
 30            if (msg.getCorrelationId() == null) {
 31                sent++;
 32                pend++;
 33            }
 34            displayStats();
 35        }
 36    };
 37
 38    void displayStats() {
 39        System.out.printf("\r" +
 40                "sent %d, " +
 41                "recv %d, " +
 42                "pend %d, " +
 43                "disc %d",
 44                sent, recv, pend, disc);
 45    }
 46
 47    void run(final String me, final String you, int sleep) throws Exception {
 48        Connector conn =
 49                Factory.createConnector(new ConnectionBuilder() {
 50                    public Connection createConnection() throws IOException {
 51                        return new ConnectionFactory().newConnection();
 52                    }
 53                });
 54        Messaging m = Factory.createMessaging();
 55        m.setConnector(conn);
 56        m.setIdentity(me);
 57        m.addMessageSentListener(listener);
 58        m.addSenderSetupListener(new ChannelSetupListener() {
 59            public void channelSetup(Channel channel) throws IOException {
 60                //We declare the recipient queue here to avoid
 61                //sending messages into the ether. That's an ok
 62                //thing to do for testing
 63                channel.queueDeclare(you, true, false, false, null); //durable
 64            }
 65        });
 66        m.addReceiverSetupListener(new ChannelSetupListener() {
 67            public void channelSetup(Channel channel) throws IOException {
 68                channel.queueDeclare(me, true, false, false, null); //durable
 69            }
 70        });
 71        m.init();
 72        byte[] body = new byte[0];
 73        for (int i = 0; ; i++) {
 74            //send
 75            Message msg = m.createMessage();
 76            msg.setBody(body);
 77            msg.setTo(you);
 78            msg.getProperties().setDeliveryMode(2);
 79            m.send(msg);
 80            pending.add(msg.getMessageId());
 81            //handle inbound
 82            while (true) {
 83                ReceivedMessage r = m.receiveNoWait();
 84                if (r == null) break;
 85                if (r.getCorrelationId() == null) {
 86                    recv++;
 87                    displayStats();
 88                    m.send(m.createReply(r));
 89                } else {
 90                    if (pending.contains(r.getCorrelationId())) {
 91                        pending.remove(r.getCorrelationId());
 92                        pend--;
 93                    } else {
 94                        disc++;
 95                    }
 96                    displayStats();
 97                }
 98                m.ack(r);
 99            }
100            //Slow down to prevent pending from growing w/o bounds
101            Thread.sleep(sleep + pend);
102        }
103    }
104}
105