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

Example 36 with Rnd

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

the class SymbolMapTest method testSimpleRead.

@Test
public void testSimpleRead() throws Exception {
    TestUtils.assertMemoryLeak(() -> {
        int N = 1000000;
        Rnd rnd = new Rnd();
        try (Path path = new Path().of(configuration.getRoot())) {
            create(path, "x", N, false);
            try (SymbolMapWriter writer = new SymbolMapWriter(configuration, path, "x", 0)) {
                long prev = -1L;
                for (int i = 0; i < N; i++) {
                    CharSequence cs = rnd.nextChars(10);
                    long key = writer.put(cs);
                    Assert.assertEquals(prev + 1, key);
                    prev = key;
                }
            }
            rnd.reset();
            try (SymbolMapReaderImpl reader = new SymbolMapReaderImpl(configuration, path, "x", N)) {
                for (int i = 0; i < N; i++) {
                    CharSequence cs = rnd.nextChars(10);
                    TestUtils.assertEquals(cs, reader.value(i));
                    Assert.assertEquals(i, reader.getQuick(cs));
                }
                Assert.assertEquals(N, reader.size());
                Assert.assertNull(reader.value(-1));
                Assert.assertNull(reader.value(N));
                Assert.assertEquals(SymbolTable.VALUE_NOT_FOUND, reader.getQuick("hola"));
            }
        }
    });
}

Example 37 with Rnd

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

the class ObjListTest method testAdd.

@Test
public void testAdd() {
    Rnd rnd = new Rnd();
    ObjList<String> list = new ObjList<>();
    for (int i = 0; i < 100; i++) {
        list.add(rnd.nextString(10));
    }
    Assert.assertEquals(100, list.size());
    rnd.reset();
    for (int i = 0; i < list.size(); i++) {
        Assert.assertEquals(rnd.nextString(10), list.getQuick(i));
    }
}

Example 38 with Rnd

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

the class CachingReaderFactoryTest method testConcurrentOpenAndClose.

@Test
public void testConcurrentOpenAndClose() throws Exception {
    final int readerCount = 5;
    int threadCount = 2;
    final int iterations = 1000;
    // create journals to read
    final JournalMetadata<?>[] meta = new JournalMetadata[readerCount];
    for (int i = 0; i < readerCount; i++) {
        final JournalMetadata<?> m = new JournalStructure("x" + i).$date("ts").$().build();
        ((WriterFactory) getFactory()).writer(m).close();
        meta[i] = m;
    }
    try (final CachingReaderFactory rf = new CachingReaderFactory(factoryContainer.getConfiguration(), 1000, 2)) {
        final CyclicBarrier barrier = new CyclicBarrier(threadCount);
        final CountDownLatch halt = new CountDownLatch(threadCount);
        final AtomicInteger errors = new AtomicInteger();
        for (int i = 0; i < threadCount; i++) {
            final int x = i;
            new Thread(() -> {
                Rnd rnd = new Rnd(x, -x);
                try {
                    barrier.await();
                    for (int i1 = 0; i1 < iterations; i1++) {
                        JournalMetadata<?> m = meta[rnd.nextPositiveInt() % readerCount];
                        try (Journal ignored = rf.reader(m)) {
                            LockSupport.parkNanos(100);
                        }
                    }
                } catch (Exception e) {
                    e.printStackTrace();
                    errors.incrementAndGet();
                } finally {
                    halt.countDown();
                }
            }).start();
        }
        halt.await();
        Assert.assertEquals(0, errors.get());
    }
}

Example 39 with Rnd

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

the class FilteredTableRecordCursorFactoryTest method testFactory.

@Test
public void testFactory() throws Exception {
    TestUtils.assertMemoryLeak(() -> {
        final int N = 100;
        // separate two symbol columns with primitive. It will make problems apparent if index does not shift correctly
        try (TableModel model = new TableModel(configuration, "x", PartitionBy.DAY).col("a", ColumnType.STRING).col("b", ColumnType.SYMBOL).indexed(true, N / 4).col("i", ColumnType.INT).col("c", ColumnType.SYMBOL).indexed(true, N / 4).timestamp()) {
            CairoTestUtils.create(model);
        }
        final Rnd rnd = new Rnd();
        final String[] symbols = new String[N];
        final int M = 1000;
        final long increment = 1000000 * 60L * 4;
        for (int i = 0; i < N; i++) {
            symbols[i] = rnd.nextChars(8).toString();
        }
        rnd.reset();
        // prepare the data
        long timestamp = 0;
        try (TableWriter writer = new TableWriter(configuration, "x")) {
            for (int i = 0; i < M; i++) {
                TableWriter.Row row = writer.newRow(timestamp += increment);
                row.putStr(0, rnd.nextChars(20));
                row.putSym(1, symbols[rnd.nextPositiveInt() % N]);
                row.putInt(2, rnd.nextInt());
                row.putSym(3, symbols[rnd.nextPositiveInt() % N]);
                row.append();
            }
            writer.commit();
        }
        try (Engine engine = new Engine(configuration)) {
            String value = symbols[N - 10];
            SymbolIndexRowCursorFactory symbolIndexRowCursorFactory = new SymbolIndexRowCursorFactory(engine, "x", "b", value);
            FullTableFrameCursorFactory dataFrameFactory = new FullTableFrameCursorFactory(engine, "x");
            FilteredTableRecordCursorFactory factory = new FilteredTableRecordCursorFactory(dataFrameFactory, symbolIndexRowCursorFactory);
            RecordCursor cursor = factory.getCursor();
            while (cursor.hasNext()) {
                Record record = cursor.next();
                TestUtils.assertEquals(value, record.getSym(1));
            }
            cursor.releaseCursor();
        }
    });
}

Example 40 with Rnd

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

the class NumbersTest method testRoundDown.

@Test
public void testRoundDown() throws Exception {
    Rnd rnd = new Rnd();
    for (int i = 0; i < 1000; i++) {
        double d = rnd.nextDouble();
        double n = Numbers.roundDown(d, 8);
        Assert.assertTrue(d + " " + n + " " + (d - n - 1E-8), d - n - 1E-8 < Numbers.TOLERANCE);
    }
}