QndMultithreadSyncProducerConsumer.java

package com.github.ddth.kafka.qnd;

import java.text.MessageFormat;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.atomic.AtomicBoolean;
import java.util.concurrent.atomic.AtomicLong;

import com.github.ddth.commons.utils.IdGenerator;
import com.github.ddth.kafka.KafkaClient;
import com.github.ddth.kafka.KafkaMessage;

public class QndMultithreadSyncProducerConsumer {

    private final static IdGenerator idGen = IdGenerator.getInstance(0);

    private static Thread[] createProducerThreads(final ExecutorService executorService,
            final KafkaClient kafkaClient, final String topic, AtomicLong counterSent,
            int numThreads, final int numMsgs) {
        Thread[] result = new Thread[numThreads];
        for (int i = 0; i < numThreads; i++) {
            result[i] = new Thread("Producer - " + i) {
                public void run() {
                    for (int i = 0; i < numMsgs; i++) {
                        String content = i + ":" + idGen.generateId128Hex();
                        KafkaMessage msg = new KafkaMessage(topic, content);
                        if (kafkaClient.sendMessage(msg) != null) {
                            counterSent.incrementAndGet();
                        } else {
                            System.out.println("Something wrong!");
                            throw new RuntimeException("Something wrong!");
                        }
                    }
                }
            };
        }
        return result;
    }

    private static Thread[] createConsumerThreads(final KafkaClient kafkaClient, final String topic,
            final String groupId, AtomicLong counterReceived, final AtomicBoolean signal,
            int numThreads) {
        Thread[] result = new Thread[numThreads];
        for (int i = 0; i < numThreads; i++) {
            result[i] = new Thread("Consumer - " + i) {
                public void run() {
                    while (!signal.get()) {
                        try {
                            KafkaMessage msg = kafkaClient.consumeMessage(groupId, topic);
                            if (msg != null) {
                                counterReceived.incrementAndGet();
                            }
                        } catch (Exception e) {
                            e.printStackTrace();
                            break;
                        }
                    }
                }
            };
        }
        return result;
    }

    public static void flush(KafkaClient kafkaClient, String topic, String groupId)
            throws InterruptedException {
        kafkaClient.seekToEnd(groupId, topic);

        int numMsgs = 0;
        long t1 = System.currentTimeMillis();
        KafkaMessage msg = kafkaClient.consumeMessage(groupId, topic);
        while (msg != null) {
            numMsgs++;
            msg = kafkaClient.consumeMessage(groupId, topic);
        }
        System.out.println(
                "* Flush " + numMsgs + " msgs in " + (System.currentTimeMillis() - t1) + "ms.");
    }

    public static void run(KafkaClient kafkaClient, String topic, String groupId, int numMsgs,
            int numProducers, int numConsumers) throws InterruptedException {
        final AtomicBoolean SIGNAL = new AtomicBoolean(false);
        final AtomicLong COUNTER_SENT = new AtomicLong(0);
        final AtomicLong COUNTER_RECEIVED = new AtomicLong(0);
        final ExecutorService executorService = Executors.newFixedThreadPool(4);

        Thread[] producers = createProducerThreads(executorService, kafkaClient, topic,
                COUNTER_SENT, numProducers, numMsgs / numProducers);
        Thread[] consumers = createConsumerThreads(kafkaClient, topic, groupId, COUNTER_RECEIVED,
                SIGNAL, numConsumers);

        long t1 = System.currentTimeMillis();
        for (Thread t : producers) {
            t.start();
        }
        for (Thread t : consumers) {
            t.start();
        }
        for (Thread th : producers) {
            th.join();
        }
        long t2 = System.currentTimeMillis();
        while (COUNTER_RECEIVED.get() < numMsgs && System.currentTimeMillis() - t1 < 30000) {
            Thread.sleep(1);
        }
        SIGNAL.set(true);
        for (Thread th : consumers) {
            th.join();
        }
        long t3 = System.currentTimeMillis();
        long d1 = t2 - t1;
        long d2 = t3 - t2;

        System.out.println(MessageFormat.format("== TEST - {0}P{1}C", numProducers, numConsumers));
        if (COUNTER_SENT.get() != COUNTER_RECEIVED.get()) {
            System.out.print("[F]");
        } else {
            System.out.print("[T]");
        }
        System.out.println("  Msgs: " + numMsgs + " / " + COUNTER_SENT.get() + " - "
                + COUNTER_RECEIVED.get() + " / Duration Send: " + d1 + "ms - "
                + String.format("%,.1f", numMsgs * 1000.0 / d1) + " msg/s" + " / Duration Receive: "
                + d2 + "ms - " + String.format("%,.1f", numMsgs * 1000.0 / d2) + " msg/s");
        System.out.println("\tShutting down...");
        executorService.shutdown();
        System.out.println("\tdone.");
    }

    public static void main(String[] args) throws Exception {
        final String BOOTSTRAP_SERVERS = "localhost:9092";
        final String TOPIC = "ddth-kafka";
        final String GROUP_ID = "ddth-kafka";
        final int NUM_MSGS = 1 * 1024;

        try (KafkaClient kafkaClient = new KafkaClient(BOOTSTRAP_SERVERS)) {
            kafkaClient.init();
            flush(kafkaClient, TOPIC, GROUP_ID);
            run(kafkaClient, TOPIC, GROUP_ID, NUM_MSGS, 1, 1);
        }

        try (KafkaClient kafkaClient = new KafkaClient(BOOTSTRAP_SERVERS)) {
            kafkaClient.init();
            flush(kafkaClient, TOPIC, GROUP_ID);
            run(kafkaClient, TOPIC, GROUP_ID, NUM_MSGS, 4, 1);
        }

        try (KafkaClient kafkaClient = new KafkaClient(BOOTSTRAP_SERVERS)) {
            kafkaClient.init();
            flush(kafkaClient, TOPIC, GROUP_ID);
            run(kafkaClient, TOPIC, GROUP_ID, NUM_MSGS, 1, 4);
        }

        try (KafkaClient kafkaClient = new KafkaClient(BOOTSTRAP_SERVERS)) {
            kafkaClient.init();
            flush(kafkaClient, TOPIC, GROUP_ID);
            run(kafkaClient, TOPIC, GROUP_ID, NUM_MSGS, 4, 4);
        }
    }

}