Examples with VCollection de.fhg.igd.mongomvcc.VCollection used on opensource projects

Example 6 with VCollection

use of de.fhg.igd.mongomvcc.VCollection in project mongomvcc by igd-geo.

the class MongoDBVLargeCollectionTest method largeObjectByte.

/**
	 * Tests if large objects with byte arrays/streams/buffers can be saved in the database
	 * @throws Exception if something goes wrong
	 */
@Test
public void largeObjectByte() throws Exception {
    VCollection coll = _master.getLargeCollection("images");
    byte[] test = new byte[1024 * 1024];
    for (int i = 0; i < test.length; ++i) {
        test[i] = (byte) (i & 0xFF);
    }
    Map<String, Object> obj = new HashMap<String, Object>();
    obj.put("name", "Mona Lisa");
    obj.put("data", test);
    coll.insert(obj);
    VCursor vc = coll.find();
    assertEquals(1, vc.size());
    Map<String, Object> obj2 = vc.iterator().next();
    assertEquals("Mona Lisa", obj2.get("name"));
    assertArrayEquals(test, (byte[]) obj2.get("data"));
    ByteArrayInputStream bais = new ByteArrayInputStream(test);
    obj = new HashMap<String, Object>();
    obj.put("name", "Mona Lisa");
    obj.put("data", bais);
    coll.insert(obj);
    Map<String, Object> obj3 = coll.findOne(_factory.createDocument("uid", obj.get("uid")));
    assertEquals("Mona Lisa", obj3.get("name"));
    InputStream is3 = (InputStream) obj3.get("data");
    ByteArrayOutputStream baos = new ByteArrayOutputStream();
    byte[] buf = new byte[64 * 1024];
    int read;
    while ((read = is3.read(buf)) > 0) {
        baos.write(buf, 0, read);
    }
    assertArrayEquals(test, baos.toByteArray());
    ByteBuffer bb = ByteBuffer.wrap(test);
    obj = new HashMap<String, Object>();
    obj.put("name", "Mona Lisa");
    obj.put("data", bb);
    coll.insert(obj);
    Map<String, Object> obj4 = coll.findOne(_factory.createDocument("uid", obj.get("uid")));
    assertEquals("Mona Lisa", obj4.get("name"));
    ByteBuffer bb4 = (ByteBuffer) obj4.get("data");
    bb4.rewind();
    byte[] test4 = new byte[bb4.remaining()];
    bb4.get(test4);
    assertArrayEquals(test, test4);
}

Example 7 with VCollection

use of de.fhg.igd.mongomvcc.VCollection in project mongomvcc by igd-geo.

the class MongoDBVMaintenanceTest method makeDanglingCommits.

private Object[] makeDanglingCommits() throws InterruptedException {
    putPerson("Max", 6);
    long cid1 = _master.commit();
    VBranch master2 = _db.createBranch("master2", cid1);
    putPerson("Elvis", 3);
    long cid2 = _master.commit();
    VBranch master3 = _db.createBranch("master3", cid2);
    VCollection persons2 = master2.getCollection("persons");
    persons2.insert(_factory.createDocument("name", "Pax"));
    long cid3 = master2.commit();
    VCollection persons3 = master3.getCollection("persons");
    persons3.insert(_factory.createDocument("name", "Peter"));
    long cid4 = master3.commit();
    VBranch master1a = _db.checkout(cid2);
    VCollection persons1a = master1a.getCollection("persons");
    persons1a.insert(_factory.createDocument("name", "Tom"));
    long cid5 = master1a.commit();
    VBranch master2a = _db.checkout(cid3);
    VCollection persons2a = master2a.getCollection("persons");
    persons2a.insert(_factory.createDocument("name", "Bob"));
    long cid6 = master2a.commit();
    VBranch master3a = _db.checkout(cid4);
    VCollection persons3a = master3a.getCollection("persons");
    persons3a.insert(_factory.createDocument("name", "Howard"));
    long cid7 = master3a.commit();
    long stime = System.currentTimeMillis();
    Thread.sleep(500);
    persons3a.insert(_factory.createDocument("name", "Brenda"));
    long cid8 = master3a.commit();
    return new Object[] { new long[] { cid5, cid6, cid7, cid8 }, stime };
}

Example 8 with VCollection

use of de.fhg.igd.mongomvcc.VCollection in project mongomvcc by igd-geo.

the class IndexTest method stackOverflow.

/**
	 * This test checks if a stack overflows when there are too many commits in the database.
	 * See https://github.com/igd-geo/mongomvcc/pull/2 for more information.
	 * @throws StackOverflowError if the test fails
	 */
@Test
@Ignore("Really slow. Not necessary in all situations. See GitHub issue for more information.")
public void stackOverflow() throws StackOverflowError {
    VCollection persons = _master.getCollection("stack");
    Map<String, Object> elvis = _factory.createDocument();
    elvis.put("name", "elvis");
    for (int i = 0; i < 2500; i++) {
        persons.insert(elvis);
        _master.commit();
    }
    VDatabase db = _factory.createDatabase();
    db.connect(((MongoDBVDatabase) _db).getDB().getName());
    VBranch master = db.checkout(VConstants.MASTER);
    persons = master.getCollection("stack");
    persons.find().size();
}

Example 9 with VCollection

use of de.fhg.igd.mongomvcc.VCollection in project mongomvcc by igd-geo.

the class MongoDBVBranchTest method goBackInTime.

/**
	 * Tests if a previous version of a collection can be checked out
	 * @throws Exception if something goes wrong
	 */
@Test
public void goBackInTime() throws Exception {
    Map<String, Object> max = putPerson("Max", 6);
    long oldCid = _master.commit();
    VCollection persons = _master.getCollection("persons");
    Map<String, Object> max2 = persons.findOne(_factory.createDocument("name", "Max"));
    assertEquals(6, max2.get("age"));
    max.put("age", 7);
    persons.insert(max);
    _master.commit();
    persons = _master.getCollection("persons");
    max2 = persons.findOne(_factory.createDocument("name", "Max"));
    assertEquals(7, max2.get("age"));
    VBranch oldMaster = _db.checkout(oldCid);
    persons = oldMaster.getCollection("persons");
    max2 = persons.findOne(_factory.createDocument("name", "Max"));
    assertEquals(6, max2.get("age"));
}

Example 10 with VCollection

use of de.fhg.igd.mongomvcc.VCollection in project mongomvcc by igd-geo.

the class MongoDBVCollectionTest method lifetimeDeletedOptimization.

/**
	 * Tests if lifetime optimization takes effect. Objects that have
	 * been deleted should not be loaded but filtered out on the
	 * database level already.
	 */
@Test
public void lifetimeDeletedOptimization() {
    //insert two documents to skip in-index shortcut
    putPerson("Max", 6);
    putPerson("Pax", 8);
    _master.commit();
    VCollection persons = _master.getCollection("persons");
    VCursor cursor = persons.find();
    DBCursor dbcursor = extractDBCursor(cursor);
    assertEquals(2, cursor.size());
    assertTrue(hasAttachedFilter(cursor));
    assertEquals(2, dbcursor.size());
    putPerson("Elvis", 3);
    _master.commit();
    persons = _master.getCollection("persons");
    cursor = persons.find();
    dbcursor = extractDBCursor(cursor);
    assertEquals(3, cursor.size());
    assertTrue(hasAttachedFilter(cursor));
    assertEquals(3, dbcursor.size());
    persons.delete(_factory.createDocument("name", "Max"));
    _master.commit();
    persons = _master.getCollection("persons");
    cursor = persons.find();
    dbcursor = extractDBCursor(cursor);
    assertEquals(2, cursor.size());
    assertTrue(hasAttachedFilter(cursor));
    assertEquals(2, dbcursor.size());
}