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

Example 36 with MVStore

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

the class TestMVStore method testBtreeStore.

private void testBtreeStore() {
    String fileName = getBaseDir() + "/" + getTestName();
    FileUtils.delete(fileName);
    MVStore s = openStore(fileName);
    s.close();
    s = openStore(fileName);
    MVMap<Integer, String> m = s.openMap("data");
    int count = 2000;
    for (int i = 0; i < count; i++) {
        assertNull(m.put(i, "hello " + i));
        assertEquals("hello " + i, m.get(i));
    }
    s.commit();
    assertEquals("hello 0", m.remove(0));
    assertNull(m.get(0));
    for (int i = 1; i < count; i++) {
        assertEquals("hello " + i, m.get(i));
    }
    s.close();
    s = openStore(fileName);
    m = s.openMap("data");
    assertNull(m.get(0));
    for (int i = 1; i < count; i++) {
        assertEquals("hello " + i, m.get(i));
    }
    for (int i = 1; i < count; i++) {
        m.remove(i);
    }
    s.commit();
    assertNull(m.get(0));
    for (int i = 0; i < count; i++) {
        assertNull(m.get(i));
    }
    s.close();
}

Example 37 with MVStore

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

the class TestMVStore method testCompactMapNotOpen.

private void testCompactMapNotOpen() {
    String fileName = getBaseDir() + "/" + getTestName();
    FileUtils.delete(fileName);
    MVStore s = openStore(fileName, 1000);
    MVMap<Integer, String> m = s.openMap("data");
    int factor = 100;
    for (int j = 0; j < 10; j++) {
        for (int i = j * factor; i < 10 * factor; i++) {
            m.put(i, "Hello" + j);
        }
        s.commit();
    }
    s.close();
    s = openStore(fileName);
    s.setRetentionTime(0);
    Map<String, String> meta = s.getMetaMap();
    int chunkCount1 = 0;
    for (String k : meta.keySet()) {
        if (k.startsWith("chunk.")) {
            chunkCount1++;
        }
    }
    s.compact(80, 1);
    s.compact(80, 1);
    int chunkCount2 = 0;
    for (String k : meta.keySet()) {
        if (k.startsWith("chunk.")) {
            chunkCount2++;
        }
    }
    assertTrue(chunkCount2 >= chunkCount1);
    m = s.openMap("data");
    for (int i = 0; i < 10; i++) {
        sleep(1);
        boolean result = s.compact(50, 50 * 1024);
        if (!result) {
            break;
        }
    }
    assertFalse(s.compact(50, 1024));
    int chunkCount3 = 0;
    for (String k : meta.keySet()) {
        if (k.startsWith("chunk.")) {
            chunkCount3++;
        }
    }
    assertTrue(chunkCount1 + ">" + chunkCount2 + ">" + chunkCount3, chunkCount3 < chunkCount1);
    for (int i = 0; i < 10 * factor; i++) {
        assertEquals("x" + i, "Hello" + (i / factor), m.get(i));
    }
    s.close();
}

Example 38 with MVStore

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

the class TestMVStore method testRemoveMap.

private void testRemoveMap() throws Exception {
    String fileName = getBaseDir() + "/" + getTestName();
    FileUtils.delete(fileName);
    MVStore s = new MVStore.Builder().fileName(fileName).open();
    MVMap<Integer, Integer> map;
    map = s.openMap("data");
    map.put(1, 1);
    assertEquals(1, map.get(1).intValue());
    s.commit();
    s.removeMap(map);
    s.commit();
    map = s.openMap("data");
    assertTrue(map.isEmpty());
    map.put(2, 2);
    s.close();
}

Example 39 with MVStore

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

the class TestMVStore method testVolatileMap.

private void testVolatileMap() {
    String fileName = getBaseDir() + "/" + getTestName();
    FileUtils.delete(fileName);
    MVStore store = new MVStore.Builder().fileName(fileName).open();
    MVMap<String, String> map = store.openMap("test");
    assertFalse(map.isVolatile());
    map.setVolatile(true);
    assertTrue(map.isVolatile());
    map.put("1", "Hello");
    assertEquals("Hello", map.get("1"));
    assertEquals(1, map.size());
    store.close();
    store = new MVStore.Builder().fileName(fileName).open();
    assertTrue(store.hasMap("test"));
    map = store.openMap("test");
    assertEquals(0, map.size());
    store.close();
}

Example 40 with MVStore

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

the class TestMVStore method testAtomicOperations.

private void testAtomicOperations() {
    String fileName = getBaseDir() + "/" + getTestName();
    FileUtils.delete(fileName);
    MVStore s;
    MVMap<Integer, byte[]> m;
    s = new MVStore.Builder().fileName(fileName).open();
    m = s.openMap("data");
    // putIfAbsent
    assertNull(m.putIfAbsent(1, new byte[1]));
    assertEquals(1, m.putIfAbsent(1, new byte[2]).length);
    assertEquals(1, m.get(1).length);
    // replace
    assertNull(m.replace(2, new byte[2]));
    assertNull(m.get(2));
    assertEquals(1, m.replace(1, new byte[2]).length);
    assertEquals(2, m.replace(1, new byte[3]).length);
    assertEquals(3, m.replace(1, new byte[1]).length);
    // replace with oldValue
    assertFalse(m.replace(1, new byte[2], new byte[10]));
    assertTrue(m.replace(1, new byte[1], new byte[2]));
    assertTrue(m.replace(1, new byte[2], new byte[1]));
    // remove
    assertFalse(m.remove(1, new byte[2]));
    assertTrue(m.remove(1, new byte[1]));
    s.close();
    FileUtils.delete(fileName);
}