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

Example 96 with MVStore

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

the class TestMVStore method testReuseSpace.

private void testReuseSpace() {
    String fileName = getBaseDir() + "/" + getTestName();
    FileUtils.delete(fileName);
    long initialLength = 0;
    for (int j = 0; j < 20; j++) {
        sleep(2);
        MVStore s = openStore(fileName);
        s.setRetentionTime(0);
        MVMap<Integer, String> m = s.openMap("data");
        for (int i = 0; i < 10; i++) {
            m.put(i, "Hello");
        }
        s.commit();
        for (int i = 0; i < 10; i++) {
            assertEquals("Hello", m.get(i));
            assertEquals("Hello", m.remove(i));
        }
        s.close();
        long len = FileUtils.size(fileName);
        if (initialLength == 0) {
            initialLength = len;
        } else {
            assertTrue("len: " + len + " initial: " + initialLength + " j: " + j, len <= initialLength * 5);
        }
    }
}

Example 97 with MVStore

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

the class TestMVStore method testOffHeapStorage.

private void testOffHeapStorage() throws Exception {
    OffHeapStore offHeap = new OffHeapStore();
    MVStore s = new MVStore.Builder().fileStore(offHeap).open();
    int count = 1000;
    Map<Integer, String> map = s.openMap("data");
    for (int i = 0; i < count; i++) {
        map.put(i, "Hello " + i);
        s.commit();
    }
    assertTrue(offHeap.getWriteCount() > count);
    s.close();
    s = new MVStore.Builder().fileStore(offHeap).open();
    map = s.openMap("data");
    for (int i = 0; i < count; i++) {
        assertEquals("Hello " + i, map.get(i));
    }
    s.close();
}

Example 98 with MVStore

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

the class TestMVStore method testFileHeaderCorruption.

private void testFileHeaderCorruption() throws Exception {
    String fileName = getBaseDir() + "/" + getTestName();
    FileUtils.delete(fileName);
    MVStore s = new MVStore.Builder().fileName(fileName).pageSplitSize(1000).autoCommitDisabled().open();
    s.setRetentionTime(0);
    MVMap<Integer, byte[]> map;
    map = s.openMap("test");
    map.put(0, new byte[100]);
    for (int i = 0; i < 10; i++) {
        map = s.openMap("test" + i);
        map.put(0, new byte[1000]);
        s.commit();
    }
    FileStore fs = s.getFileStore();
    long size = fs.getFile().size();
    for (int i = 0; i < 100; i++) {
        map = s.openMap("test" + i);
        s.removeMap(map);
        s.commit();
        s.compact(100, 1);
        if (fs.getFile().size() <= size) {
            break;
        }
    }
    // the last chunk is at the end
    s.setReuseSpace(false);
    map = s.openMap("test2");
    map.put(1, new byte[1000]);
    s.close();
    FilePath f = FilePath.get(fileName);
    int blockSize = 4 * 1024;
    // test corrupt file headers
    for (int i = 0; i <= blockSize; i += blockSize) {
        FileChannel fc = f.open("rw");
        if (i == 0) {
            // corrupt the last block (the end header)
            fc.write(ByteBuffer.allocate(256), fc.size() - 256);
        }
        ByteBuffer buff = ByteBuffer.allocate(4 * 1024);
        fc.read(buff, i);
        String h = new String(buff.array(), StandardCharsets.UTF_8).trim();
        int idx = h.indexOf("fletcher:");
        int old = Character.digit(h.charAt(idx + "fletcher:".length()), 16);
        int bad = (old + 1) & 15;
        buff.put(idx + "fletcher:".length(), (byte) Character.forDigit(bad, 16));
        buff.rewind();
        fc.write(buff, i);
        fc.close();
        if (i == 0) {
            // if the first header is corrupt, the second
            // header should be used
            s = openStore(fileName);
            map = s.openMap("test");
            assertEquals(100, map.get(0).length);
            map = s.openMap("test2");
            assertFalse(map.containsKey(1));
            s.close();
        } else {
            // both headers are corrupt
            try {
                s = openStore(fileName);
                fail();
            } catch (Exception e) {
            // expected
            }
        }
    }
}

Example 99 with MVStore

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

the class TestMVStore method testFileFormatExample.

private void testFileFormatExample() {
    String fileName = getBaseDir() + "/" + getTestName();
    FileUtils.delete(fileName);
    MVStore s = MVStore.open(fileName);
    MVMap<Integer, String> map = s.openMap("data");
    for (int i = 0; i < 400; i++) {
        map.put(i, "Hello");
    }
    s.commit();
    for (int i = 0; i < 100; i++) {
        map.put(0, "Hi");
    }
    s.commit();
    s.close();
// ;MVStoreTool.dump(fileName);
}

Example 100 with MVStore

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

the class TestMVStore method testInMemory.

private void testInMemory() {
    for (int j = 0; j < 1; j++) {
        MVStore s = openStore(null);
        // s.setMaxPageSize(10);
        int len = 100;
        // TreeMap<Integer, String> m = new TreeMap<Integer, String>();
        // HashMap<Integer, String> m = New.hashMap();
        MVMap<Integer, String> m = s.openMap("data");
        for (int i = 0; i < len; i++) {
            assertNull(m.put(i, "Hello World"));
        }
        for (int i = 0; i < len; i++) {
            assertEquals("Hello World", m.get(i));
        }
        for (int i = 0; i < len; i++) {
            assertEquals("Hello World", m.remove(i));
        }
        assertEquals(null, m.get(0));
        assertEquals(0, m.size());
        s.close();
    }
}