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

Example 51 with MVStore

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

the class TestMVStore method testIsEmpty.

private void testIsEmpty() throws Exception {
    MVStore s = new MVStore.Builder().pageSplitSize(50).open();
    Map<Integer, byte[]> m = s.openMap("data");
    m.put(1, new byte[50]);
    m.put(2, new byte[50]);
    m.put(3, new byte[50]);
    m.remove(1);
    m.remove(2);
    m.remove(3);
    assertEquals(0, m.size());
    assertTrue(m.isEmpty());
    s.close();
}

Example 52 with MVStore

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

the class TestMVStore method testLargerThan2G.

private void testLargerThan2G() {
    if (!config.big) {
        return;
    }
    String fileName = getBaseDir() + "/" + getTestName();
    FileUtils.delete(fileName);
    MVStore store = new MVStore.Builder().cacheSize(16).fileName(fileName).open();
    try {
        MVMap<Integer, String> map = store.openMap("test");
        long last = System.nanoTime();
        String data = new String(new char[2500]).replace((char) 0, 'x');
        for (int i = 0; ; i++) {
            map.put(i, data);
            if (i % 10000 == 0) {
                store.commit();
                long time = System.nanoTime();
                if (time - last > TimeUnit.SECONDS.toNanos(2)) {
                    long mb = store.getFileStore().size() / 1024 / 1024;
                    trace(mb + "/4500");
                    if (mb > 4500) {
                        break;
                    }
                    last = time;
                }
            }
        }
        store.commit();
        store.close();
    } finally {
        store.closeImmediately();
    }
    FileUtils.delete(fileName);
}

Example 53 with MVStore

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

the class TestMVStore method testConcurrentOpen.

private void testConcurrentOpen() {
    String fileName = getBaseDir() + "/" + getTestName();
    FileUtils.delete(fileName);
    MVStore s = new MVStore.Builder().fileName(fileName).open();
    try {
        MVStore s1 = new MVStore.Builder().fileName(fileName).open();
        s1.close();
        fail();
    } catch (IllegalStateException e) {
    // expected
    }
    try {
        MVStore s1 = new MVStore.Builder().fileName(fileName).readOnly().open();
        s1.close();
        fail();
    } catch (IllegalStateException e) {
    // expected
    }
    assertFalse(s.getFileStore().isReadOnly());
    s.close();
    s = new MVStore.Builder().fileName(fileName).readOnly().open();
    assertTrue(s.getFileStore().isReadOnly());
    s.close();
}

Example 54 with MVStore

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

the class TestMVStore method testExample.

private void testExample() {
    String fileName = getBaseDir() + "/" + getTestName();
    FileUtils.delete(fileName);
    // open the store (in-memory if fileName is null)
    MVStore s = MVStore.open(fileName);
    // create/get the map named "data"
    MVMap<Integer, String> map = s.openMap("data");
    // add and read some data
    map.put(1, "Hello World");
    // System.out.println(map.get(1));
    // close the store (this will persist changes)
    s.close();
    s = MVStore.open(fileName);
    map = s.openMap("data");
    assertEquals("Hello World", map.get(1));
    s.close();
}

Example 55 with MVStore

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

the class TestMVStore method testWriteBuffer.

private void testWriteBuffer() {
    String fileName = getBaseDir() + "/" + getTestName();
    FileUtils.delete(fileName);
    MVStore s;
    MVMap<Integer, byte[]> m;
    byte[] data = new byte[1000];
    long lastSize = 0;
    int len = 1000;
    for (int bs = 0; bs <= 1; bs++) {
        s = new MVStore.Builder().fileName(fileName).autoCommitBufferSize(bs).open();
        m = s.openMap("data");
        for (int i = 0; i < len; i++) {
            m.put(i, data);
        }
        long size = s.getFileStore().size();
        assertTrue("last:" + lastSize + " now: " + size, size > lastSize);
        lastSize = size;
        s.close();
    }
    s = new MVStore.Builder().fileName(fileName).open();
    m = s.openMap("data");
    assertTrue(m.containsKey(1));
    m.put(-1, data);
    s.commit();
    m.put(-2, data);
    s.close();
    s = new MVStore.Builder().fileName(fileName).open();
    m = s.openMap("data");
    assertTrue(m.containsKey(-1));
    assertTrue(m.containsKey(-2));
    s.close();
    FileUtils.delete(fileName);
}