Examples with Store org.h2.mvstore.db.MVTableEngine.Store used on opensource projects

Example 26 with Store

use of org.h2.mvstore.db.MVTableEngine.Store 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 27 with Store

use of org.h2.mvstore.db.MVTableEngine.Store in project h2database by h2database.

the class TestMVStore method testRemoveMapRollback.

private void testRemoveMapRollback() {
    MVStore store = new MVStore.Builder().open();
    MVMap<String, String> map = store.openMap("test");
    map.put("1", "Hello");
    store.commit();
    store.removeMap(map);
    store.rollback();
    assertTrue(store.hasMap("test"));
    map = store.openMap("test");
    // TODO the data should get back alive
    assertNull(map.get("1"));
    store.close();
    String fileName = getBaseDir() + "/" + getTestName();
    FileUtils.delete(fileName);
    store = new MVStore.Builder().autoCommitDisabled().fileName(fileName).open();
    map = store.openMap("test");
    map.put("1", "Hello");
    store.commit();
    store.removeMap(map);
    store.rollback();
    assertTrue(store.hasMap("test"));
    map = store.openMap("test");
    // the data will get back alive
    assertEquals("Hello", map.get("1"));
    store.close();
}

Example 28 with Store

use of org.h2.mvstore.db.MVTableEngine.Store in project h2database by h2database.

the class TestMVStore method testCompressEmptyPage.

private void testCompressEmptyPage() {
    String fileName = getBaseDir() + "/" + getTestName();
    FileUtils.delete(fileName);
    MVStore store = new MVStore.Builder().cacheSize(100).fileName(fileName).compress().autoCommitBufferSize(10 * 1024).open();
    MVMap<String, String> map = store.openMap("test");
    store.removeMap(map);
    store.commit();
    store.close();
    store = new MVStore.Builder().compress().open();
    store.close();
}

Example 29 with Store

use of org.h2.mvstore.db.MVTableEngine.Store 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 30 with Store

use of org.h2.mvstore.db.MVTableEngine.Store 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();
}