Examples with Rnd io.questdb.std.Rnd used on opensource projects

Example 31 with Rnd

use of io.questdb.std.Rnd in project questdb by bluestreak01.

the class ConcurrentTest method testOneToOneBatched.

@Test
public void testOneToOneBatched() throws BrokenBarrierException, InterruptedException {
    final int cycle = 1024;
    final int size = 1024 * cycle;
    final RingQueue<Event> queue = new RingQueue<>(Event.FACTORY, cycle);
    final SPSequence pubSeq = new SPSequence(cycle);
    final SCSequence subSeq = new SCSequence();
    pubSeq.then(subSeq).then(pubSeq);
    CyclicBarrier barrier = new CyclicBarrier(2);
    new Thread(() -> {
        try {
            barrier.await();
            Rnd rnd = new Rnd();
            for (int i = 0; i < size; ) {
                long cursor = pubSeq.next();
                if (cursor > -1) {
                    long available = pubSeq.available();
                    while (cursor < available && i < size) {
                        Event event = queue.get(cursor++);
                        event.value = rnd.nextInt();
                        i++;
                    }
                    pubSeq.done(cursor - 1);
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }).start();
    barrier.await();
    int consumed = 0;
    final Rnd rnd2 = new Rnd();
    while (consumed < size) {
        long cursor = subSeq.next();
        if (cursor > -1) {
            long available = subSeq.available();
            while (cursor < available) {
                Assert.assertEquals(rnd2.nextInt(), queue.get(cursor++).value);
                consumed++;
            }
            subSeq.done(available - 1);
        }
    }
}

Example 32 with Rnd

use of io.questdb.std.Rnd in project questdb by bluestreak01.

the class MinDoubleGroupByFunctionFactoryTest method testNonNull.

@Test
public void testNonNull() throws SqlException {
    compiler.compile("create table tab (f double)", sqlExecutionContext);
    final Rnd rnd = new Rnd();
    try (TableWriter w = engine.getWriter(sqlExecutionContext.getCairoSecurityContext(), "tab", "testing")) {
        for (int i = 100; i > 10; i--) {
            TableWriter.Row r = w.newRow();
            r.putDouble(0, rnd.nextDouble());
            r.append();
        }
        w.commit();
    }
    try (RecordCursorFactory factory = compiler.compile("select min(f) from tab", sqlExecutionContext).getRecordCursorFactory()) {
        try (RecordCursor cursor = factory.getCursor(sqlExecutionContext)) {
            Record record = cursor.getRecord();
            Assert.assertEquals(1, cursor.size());
            Assert.assertTrue(cursor.hasNext());
            Assert.assertEquals(0.0011075139045715332, record.getDouble(0), 0.0001);
        }
    }
}

Example 33 with Rnd

use of io.questdb.std.Rnd in project questdb by bluestreak01.

the class MinDoubleGroupByFunctionFactoryTest method testFirstNull.

@Test
public void testFirstNull() throws SqlException {
    compiler.compile("create table tab (f double)", sqlExecutionContext);
    final Rnd rnd = new Rnd();
    try (TableWriter w = engine.getWriter(sqlExecutionContext.getCairoSecurityContext(), "tab", "testing")) {
        TableWriter.Row r = w.newRow();
        r.append();
        for (int i = 100; i > 10; i--) {
            r = w.newRow();
            r.putDouble(0, rnd.nextDouble());
            r.append();
        }
        w.commit();
    }
    try (RecordCursorFactory factory = compiler.compile("select min(f) from tab", sqlExecutionContext).getRecordCursorFactory()) {
        try (RecordCursor cursor = factory.getCursor(sqlExecutionContext)) {
            Record record = cursor.getRecord();
            Assert.assertEquals(1, cursor.size());
            Assert.assertTrue(cursor.hasNext());
            Assert.assertEquals(0.0011075139045715332, record.getDouble(0), 0.0001);
        }
    }
}

Example 34 with Rnd

use of io.questdb.std.Rnd in project questdb by bluestreak01.

the class MinFloatGroupByFunctionFactoryTest method testNonNull.

@Test
public void testNonNull() throws SqlException {
    compiler.compile("create table tab (f float)", sqlExecutionContext);
    final Rnd rnd = new Rnd();
    try (TableWriter w = engine.getWriter(sqlExecutionContext.getCairoSecurityContext(), "tab", "testing")) {
        for (int i = 100; i > 10; i--) {
            TableWriter.Row r = w.newRow();
            r.putFloat(0, rnd.nextFloat());
            r.append();
        }
        w.commit();
    }
    try (RecordCursorFactory factory = compiler.compile("select min(f) from tab", sqlExecutionContext).getRecordCursorFactory()) {
        try (RecordCursor cursor = factory.getCursor(sqlExecutionContext)) {
            Record record = cursor.getRecord();
            Assert.assertEquals(1, cursor.size());
            Assert.assertTrue(cursor.hasNext());
            Assert.assertEquals(0.0011075139045715332, record.getFloat(0), 0.0001);
        }
    }
}

Example 35 with Rnd

use of io.questdb.std.Rnd in project questdb by bluestreak01.

the class MinLongGroupByFunctionFactoryTest method testNonNull.

@Test
public void testNonNull() throws SqlException {
    compiler.compile("create table tab (f long)", sqlExecutionContext);
    final Rnd rnd = new Rnd();
    try (TableWriter w = engine.getWriter(sqlExecutionContext.getCairoSecurityContext(), "tab", "testing")) {
        for (int i = 100; i > 10; i--) {
            TableWriter.Row r = w.newRow();
            r.putLong(0, rnd.nextLong());
            r.append();
        }
        w.commit();
    }
    try (RecordCursorFactory factory = compiler.compile("select min(f) from tab", sqlExecutionContext).getRecordCursorFactory()) {
        try (RecordCursor cursor = factory.getCursor(sqlExecutionContext)) {
            Record record = cursor.getRecord();
            Assert.assertEquals(1, cursor.size());
            Assert.assertTrue(cursor.hasNext());
            Assert.assertEquals(-8968886490993754893L, record.getLong(0));
        }
    }
}