Examples with CacheLongKeyLIRS org.h2.mvstore.cache.CacheLongKeyLIRS used on opensource projects

Example 1 with CacheLongKeyLIRS

use of org.h2.mvstore.cache.CacheLongKeyLIRS in project h2database by h2database.

the class TestCacheConcurrentLIRS method testConcurrent.

private void testConcurrent() {
    CacheLongKeyLIRS.Config cc = new CacheLongKeyLIRS.Config();
    cc.maxMemory = 100;
    final CacheLongKeyLIRS<Integer> test = new CacheLongKeyLIRS<>(cc);
    int threadCount = 8;
    final CountDownLatch wait = new CountDownLatch(1);
    final AtomicBoolean stopped = new AtomicBoolean();
    Task[] tasks = new Task[threadCount];
    final int[] getCounts = new int[threadCount];
    final int offset = 1000000;
    for (int i = 0; i < 100; i++) {
        test.put(offset + i, i);
    }
    final int[] keys = new int[1000];
    Random random = new Random(1);
    for (int i = 0; i < keys.length; i++) {
        int key;
        do {
            key = (int) Math.abs(random.nextGaussian() * 50);
        } while (key > 100);
        keys[i] = key;
    }
    for (int i = 0; i < threadCount; i++) {
        final int x = i;
        Task t = new Task() {

            @Override
            public void call() throws Exception {
                Random random = new Random(x);
                wait.await();
                int i = 0;
                for (; !stopped.get(); i++) {
                    int key = keys[random.nextInt(keys.length)];
                    test.get(offset + key);
                    if ((i & 127) == 0) {
                        test.put(offset + random.nextInt(100), random.nextInt());
                    }
                }
                getCounts[x] = i;
            }
        };
        t.execute("t" + i);
        tasks[i] = t;
    }
    wait.countDown();
    try {
        Thread.sleep(2000);
    } catch (InterruptedException e) {
        e.printStackTrace();
    }
    stopped.set(true);
    for (Task t : tasks) {
        t.get();
    }
    int totalCount = 0;
    for (int x : getCounts) {
        totalCount += x;
    }
    trace("requests: " + totalCount);
}