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

Example 6 with VCursor

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

the class MongoDBVLargeCollectionTest method largeObjectFloat.

/**
 * Tests if large objects with float arrays/streams/buffers can be saved in the database
 * @throws Exception if something goes wrong
 */
@Test
public void largeObjectFloat() throws Exception {
    VCollection coll = _master.getLargeCollection("images");
    float[] test = new float[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, (float[]) obj2.get("data"), 0.00001f);
    FloatBuffer bb = FloatBuffer.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"));
    FloatBuffer bb4 = (FloatBuffer) obj4.get("data");
    bb4.rewind();
    float[] test4 = new float[bb4.remaining()];
    bb4.get(test4);
    assertArrayEquals(test, test4, 0.00001f);
}

Example 7 with VCursor

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

the class MongoDBVCollectionTest method findNone.

/**
 * Tests what happens if a query returns an empty result
 */
@Test
public void findNone() {
    for (int i = 0; i < 20; ++i) {
        putPerson(String.valueOf(i), i);
    }
    _master.commit();
    VCursor vc = _master.getCollection("persons").find(_factory.createDocument("name", "100"));
    assertEquals(0, vc.size());
}

Example 8 with VCursor

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

the class MongoDBVCollectionTest method lifetimeInsertedLaterOptimization.

/**
 * Tests if lifetime optimization takes effect. Objects that have
 * been inserted in a later commit should not be loaded but filtered
 * out on the database level already.
 */
@Test
@Ignore("Not ready yet. We need to implement full branch history.")
public void lifetimeInsertedLaterOptimization() {
    // ignore this test if we're on MongoDB 1.x
    assumeNotNull(((MongoDBVDatabase) _db).getBuildInfo());
    assumeTrue(((MongoDBVDatabase) _db).getBuildInfo().getMajorVersion() >= 2);
    // insert two documents to skip in-index shortcut
    putPerson("Max", 6);
    putPerson("Pax", 8);
    long firstCID = _master.commit();
    putPerson("Elvis", 3);
    _master.commit();
    VBranch oldMaster = _db.checkout(firstCID);
    VCollection persons = oldMaster.getCollection("persons");
    VCursor cursor = persons.find();
    DBCursor dbcursor = extractDBCursor(cursor);
    assertEquals(2, cursor.size());
    assertTrue(hasAttachedFilter(cursor));
    assertEquals(2, dbcursor.size());
}

Example 9 with VCursor

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

the class MongoDBVCollectionTest method findFields.

/**
 * Tests if a partial object can be retrieved
 */
@Test
public void findFields() {
    putPerson("Peter", 26);
    _master.commit();
    VCursor vc = _master.getCollection("persons").find(_factory.createDocument("name", "Peter"), "name");
    assertEquals(1, vc.size());
    Map<String, Object> p = vc.iterator().next();
    assertEquals("Peter", p.get("name"));
    assertNull(p.get("age"));
    assertNotNull(p.get("_id"));
    assertNotNull(p.get("uid"));
    // name, UID and OID
    assertEquals(3, p.size());
}

Example 10 with VCursor

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

the class MongoDBVCollectionTest method deleteByExample.

/**
 * Deletes an object by example
 * @throws Exception if something goes wrong
 */
@Test
public void deleteByExample() throws Exception {
    putPerson("Max", 6);
    Map<String, Object> p = putPerson("Peter", 26);
    VCollection persons = _master.getCollection("persons");
    assertEquals(2, persons.find().size());
    persons.delete(_factory.createDocument("name", "Max"));
    VCursor ps = persons.find();
    assertEquals(1, ps.size());
    assertDocEquals(p, ps.iterator().next());
}