Examples with MVStore org.h2.mvstore.MVStore used on opensource projects

Example 11 with MVStore

use of org.h2.mvstore.MVStore in project h2database by h2database.

the class TestConcurrent method testInterruptReopen.

private void testInterruptReopen() throws Exception {
    String fileName = "retry:nio:" + getBaseDir() + "/" + getTestName();
    FileUtils.delete(fileName);
    final MVStore s = new MVStore.Builder().fileName(fileName).cacheSize(0).open();
    final Thread mainThread = Thread.currentThread();
    Task task = new Task() {

        @Override
        public void call() throws Exception {
            while (!stop) {
                mainThread.interrupt();
                Thread.sleep(10);
            }
        }
    };
    try {
        MVMap<Integer, byte[]> map = s.openMap("data");
        task.execute();
        for (int i = 0; i < 1000 && !task.isFinished(); i++) {
            map.get(i % 1000);
            map.put(i % 1000, new byte[1024]);
            s.commit();
        }
    } finally {
        task.get();
        s.close();
    }
}

Example 12 with MVStore

use of org.h2.mvstore.MVStore in project h2database by h2database.

the class TestConcurrent method testConcurrentIterate.

private static void testConcurrentIterate() {
    MVStore s = new MVStore.Builder().pageSplitSize(3).open();
    s.setVersionsToKeep(100);
    final MVMap<Integer, Integer> map = s.openMap("test");
    final int len = 10;
    final Random r = new Random();
    Task task = new Task() {

        @Override
        public void call() throws Exception {
            while (!stop) {
                int x = r.nextInt(len);
                if (r.nextBoolean()) {
                    map.remove(x);
                } else {
                    map.put(x, r.nextInt(100));
                }
            }
        }
    };
    task.execute();
    try {
        for (int k = 0; k < 10000; k++) {
            Iterator<Integer> it = map.keyIterator(r.nextInt(len));
            long old = s.getCurrentVersion();
            s.commit();
            while (map.getVersion() == old) {
                Thread.yield();
            }
            while (it.hasNext()) {
                it.next();
            }
        }
    } finally {
        task.get();
    }
    s.close();
}

Example 13 with MVStore

use of org.h2.mvstore.MVStore in project h2database by h2database.

the class TestConcurrent method testConcurrentOnlineBackup.

private void testConcurrentOnlineBackup() throws Exception {
    String fileName = getBaseDir() + "/" + getTestName();
    String fileNameRestore = getBaseDir() + "/" + getTestName() + "2";
    final MVStore s = openStore(fileName);
    final MVMap<Integer, byte[]> map = s.openMap("test");
    final Random r = new Random();
    Task task = new Task() {

        @Override
        public void call() throws Exception {
            while (!stop) {
                for (int i = 0; i < 10; i++) {
                    map.put(i, new byte[100 * r.nextInt(100)]);
                }
                s.commit();
                map.clear();
                s.commit();
                long len = s.getFileStore().size();
                if (len > 1024 * 1024) {
                    // slow down writing a lot
                    Thread.sleep(200);
                } else if (len > 20 * 1024) {
                    // slow down writing
                    Thread.sleep(20);
                }
            }
        }
    };
    task.execute();
    try {
        for (int i = 0; i < 10; i++) {
            // System.out.println("test " + i);
            s.setReuseSpace(false);
            OutputStream out = new BufferedOutputStream(new FileOutputStream(fileNameRestore));
            long len = s.getFileStore().size();
            copyFileSlowly(s.getFileStore().getFile(), len, out);
            out.close();
            s.setReuseSpace(true);
            MVStore s2 = openStore(fileNameRestore);
            MVMap<Integer, byte[]> test = s2.openMap("test");
            for (Integer k : test.keySet()) {
                test.get(k);
            }
            s2.close();
            // let it compact
            Thread.sleep(10);
        }
    } finally {
        task.get();
    }
    s.close();
}

Example 14 with MVStore

use of org.h2.mvstore.MVStore in project h2database by h2database.

the class TestConcurrent method testConcurrentSaveCompact.

private void testConcurrentSaveCompact() throws Exception {
    String fileName = "memFS:" + getTestName();
    FileUtils.delete(fileName);
    final MVStore s = new MVStore.Builder().fileName(fileName).cacheSize(0).open();
    try {
        s.setRetentionTime(0);
        final MVMap<Integer, Integer> dataMap = s.openMap("data");
        Task task = new Task() {

            @Override
            public void call() throws Exception {
                int i = 0;
                while (!stop) {
                    s.compact(100, 1024 * 1024);
                    dataMap.put(i % 1000, i * 10);
                    s.commit();
                    i++;
                }
            }
        };
        task.execute();
        for (int i = 0; i < 1000 && !task.isFinished(); i++) {
            s.compact(100, 1024 * 1024);
            dataMap.put(i % 1000, i * 10);
            s.commit();
        }
        task.get();
    } finally {
        s.close();
    }
}

Example 15 with MVStore

use of org.h2.mvstore.MVStore in project h2database by h2database.

the class TestConcurrent method testConcurrentAutoCommitAndChange.

private void testConcurrentAutoCommitAndChange() throws InterruptedException {
    String fileName = "memFS:" + getTestName();
    FileUtils.delete(fileName);
    final MVStore s = new MVStore.Builder().fileName(fileName).pageSplitSize(1000).open();
    try {
        s.setRetentionTime(1000);
        s.setAutoCommitDelay(1);
        Task task = new Task() {

            @Override
            public void call() throws Exception {
                while (!stop) {
                    s.compact(100, 1024 * 1024);
                }
            }
        };
        final MVMap<Integer, Integer> dataMap = s.openMap("data");
        final MVMap<Integer, Integer> dataSmallMap = s.openMap("dataSmall");
        s.openMap("emptyMap");
        final AtomicInteger counter = new AtomicInteger();
        Task task2 = new Task() {

            @Override
            public void call() throws Exception {
                while (!stop) {
                    int i = counter.getAndIncrement();
                    dataMap.put(i, i * 10);
                    dataSmallMap.put(i % 100, i * 10);
                    if (i % 100 == 0) {
                        dataSmallMap.clear();
                    }
                }
            }
        };
        task.execute();
        task2.execute();
        Thread.sleep(1);
        for (int i = 0; !task.isFinished() && !task2.isFinished() && i < 1000; i++) {
            MVMap<Integer, Integer> map = s.openMap("d" + (i % 3));
            map.put(0, i);
            s.commit();
        }
        task.get();
        task2.get();
        for (int i = 0; i < counter.get(); i++) {
            assertEquals(10 * i, dataMap.get(i).intValue());
        }
    } finally {
        s.close();
    }
}