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

Example 66 with Rnd

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

the class TableReaderRecordCursorFactoryTest 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 * 10;
        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)) {
            RecordCursorFactory factory = new TableReaderRecordCursorFactory(engine, "x");
            long count = 0;
            RecordCursor cursor = factory.getCursor();
            try {
                rnd.reset();
                while (cursor.hasNext()) {
                    Record record = cursor.next();
                    TestUtils.assertEquals(rnd.nextChars(20), record.getFlyweightStr(0));
                    TestUtils.assertEquals(symbols[rnd.nextPositiveInt() % N], record.getSym(1));
                    Assert.assertEquals(rnd.nextInt(), record.getInt(2));
                    TestUtils.assertEquals(symbols[rnd.nextPositiveInt() % N], record.getSym(3));
                    count++;
                }
            } finally {
                cursor.releaseCursor();
            }
            Assert.assertEquals(0, engine.getBusyReaderCount());
            Assert.assertEquals(M, count);
        }
    });
}

Example 67 with Rnd

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

the class RedBlackTreeTest method testAddAndGet.

@Test
public void testAddAndGet() {
    Rnd rnd = new Rnd();
    TreeSet<Long> control = new TreeSet<>();
    try (RedBlackTree tree = new RedBlackTree(new RedBlackTree.LongComparator() {

        private long left;

        @Override
        public int compare(long y) {
            return Long.compare(left, y);
        }

        @Override
        public void setLeft(long left) {
            this.left = left;
        }
    }, 1024)) {
        long l;
        for (int i = 0; i < 10000; i++) {
            tree.add(l = rnd.nextLong());
            control.add(l);
        }
        Iterator<Long> controlIterator = control.iterator();
        RedBlackTree.LongIterator iterator = tree.iterator();
        while (iterator.hasNext()) {
            Assert.assertTrue(controlIterator.hasNext());
            Assert.assertEquals(controlIterator.next().longValue(), iterator.next());
        }
        tree.clear();
        Assert.assertFalse(tree.iterator().hasNext());
    }
}

Example 68 with Rnd

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

the class RBTreeSortedRecordSourceTest method setUp.

@BeforeClass
public static void setUp() throws Exception {
    try (JournalWriter w = FACTORY_CONTAINER.getFactory().writer(new JournalStructure("xyz").$int("i").$str("str").$())) {
        int n = 100;
        Rnd rnd = new Rnd();
        for (int i = 0; i < n; i++) {
            JournalEntryWriter ew = w.entryWriter();
            ew.putInt(0, rnd.nextInt());
            ew.putStr(1, rnd.nextChars(2));
            ew.append();
        }
        w.commit();
    }
    try (JournalWriter w = FACTORY_CONTAINER.getFactory().writer(new JournalStructure("dupes").$int("x").$())) {
        for (int i = 0; i < 10; i++) {
            JournalEntryWriter ew = w.entryWriter();
            ew.putInt(0, i % 2 == 0 ? 10 : 20);
            ew.append();
        }
        JournalEntryWriter ew = w.entryWriter();
        ew.putInt(0, 30);
        ew.append();
        w.commit();
    }
    try (JournalWriter w = FACTORY_CONTAINER.getFactory().writer(new JournalStructure("timeseries").$double("d").$ts().$())) {
        Rnd rnd = new Rnd();
        long ts = Dates.toMillis(2016, 3, 12, 0, 0);
        for (int i = 0; i < 1000; i++) {
            JournalEntryWriter ew = w.entryWriter();
            ew.putDouble(0, rnd.nextDouble());
            ew.putDate(1, ts + (rnd.nextPositiveInt() % Dates.DAY_MILLIS));
            ew.append();
        }
        w.commit();
    }
}

Example 69 with Rnd

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

the class BinaryTest method testBinaryPerformance.

@Test
public void testBinaryPerformance() throws Exception {
    try (JournalWriter<Band> writer = getFactory().writer(Band.class)) {
        final int count = 20000;
        Rnd r = new Rnd(System.currentTimeMillis(), System.currentTimeMillis());
        byte[] bytes = r.nextBytes(10240);
        String[] types = new String[] { "jazz", "rap", "pop", "rock", "soul" };
        String[] bands = new String[1200];
        for (int i = 0; i < bands.length; i++) {
            bands[i] = r.nextString(10);
        }
        long t = System.nanoTime();
        Band band = new Band();
        for (int i = 0; i < count; i++) {
            band.setName(bands[Math.abs(r.nextInt() % bands.length)]);
            band.setType(types[Math.abs(r.nextInt() % types.length)]);
            band.setImage(bytes);
            writer.append(band);
        }
        writer.commit();
        LOGGER.info().$("Appended ").$(count).$(" 10k blobs in ").$(TimeUnit.NANOSECONDS.toMillis(System.nanoTime() - t)).$("ms.").$();
    }
}

Example 70 with Rnd

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

the class ColumnTest method testTwoByteEdges.

@Test
public void testTwoByteEdges() throws JournalException {
    Rnd r = new Rnd();
    String s1 = r.nextString(65000);
    String s2 = r.nextString(65000);
    MemoryFile df1 = new MemoryFile(dataFile, 22, JournalMode.APPEND, false);
    MemoryFile idxFile1 = new MemoryFile(indexFile, 22, JournalMode.APPEND, false);
    try (VariableColumn varchar1 = new VariableColumn(df1, idxFile1)) {
        varchar1.putStr(s1);
        varchar1.commit();
        varchar1.putStr(s2);
        varchar1.commit();
    }
    MemoryFile df2 = new MemoryFile(dataFile, 22, JournalMode.READ, false);
    MemoryFile idxFile2 = new MemoryFile(indexFile, 22, JournalMode.READ, false);
    try (VariableColumn varchar2 = new VariableColumn(df2, idxFile2)) {
        Assert.assertEquals(s1, varchar2.getStr(0));
        Assert.assertEquals(s2, varchar2.getStr(1));
    }
}