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

Example 1 with Rnd

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

the class ScenarioTest method testLagTrickle.

@Test
public void testLagTrickle() throws Exception {
    // prepare test data
    try (JournalWriter<Quote> origin = getFactory().writer(Quote.class, "origin")) {
        TestData.appendQuoteData2(origin);
        try (final JournalWriter<Quote> randomOrigin = getFactory().writer(new JournalKey<>(Quote.class, "origin-rnd", PartitionBy.NONE, Constants.NULL_RECORD_HINT, false))) {
            randomOrigin.append(origin.query().all().asResultSet().shuffle(new Rnd()));
            try (final JournalWriter<Quote> remote = getFactory().writer(Quote.class, "remote")) {
                try (final Journal<Quote> remoteReader = getFactory().reader(Quote.class, "remote")) {
                    // create empty journal
                    getFactory().writer(Quote.class, "local").close();
                    // setup local where data should be trickling from client
                    try (final Journal<Quote> local = getFactory().reader(Quote.class, "local")) {
                        Assert.assertEquals(0, local.size());
                        JournalServer server = new JournalServer(serverConfig, getFactory());
                        JournalClient client = new JournalClient(clientConfig, getFactory());
                        server.publish(remote);
                        server.start();
                        final AtomicInteger errors = new AtomicInteger();
                        final CountDownLatch ready = new CountDownLatch(1);
                        client.subscribe(Quote.class, "remote", "local", new JournalListener() {

                            @Override
                            public void onCommit() {
                                try {
                                    if (local.refresh() && local.size() == 33) {
                                        ready.countDown();
                                    }
                                } catch (JournalException e) {
                                    errors.incrementAndGet();
                                    e.printStackTrace();
                                }
                            }

                            @Override
                            public void onEvent(int event) {
                                if (event != JournalEvents.EVT_JNL_SUBSCRIBED) {
                                    errors.incrementAndGet();
                                }
                            }
                        });
                        client.start();
                        int n = 0;
                        while (n < 400) {
                            lagIteration(randomOrigin, remote, n, n + 10);
                            n += 10;
                        }
                        Assert.assertTrue(ready.await(10, TimeUnit.SECONDS));
                        server.halt();
                        client.halt();
                        local.refresh();
                        remoteReader.refresh();
                        TestUtils.assertEquals(remoteReader, local);
                        Assert.assertEquals(0, errors.get());
                    }
                }
            }
        }
    }
}

Example 2 with Rnd

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

the class AppendRawTimeSeries method main.

public static void main(String[] args) throws JournalException, ParserException {
    if (args.length < 1) {
        System.out.println("Usage: AppendRawTimeSeries <path>");
        System.exit(1);
    }
    final String location = args[0];
    // factory can be reused in application and must be explicitly closed when no longer needed.
    try (Factory factory = new Factory(location, 1000, 1, 0)) {
        // to populate it.
        try (JournalWriter writer = factory.writer(new JournalStructure("customers").$int("id").$str("name").$ts("updateDate").$())) {
            Rnd rnd = new Rnd();
            long timestamp = System.currentTimeMillis();
            for (int i = 0; i < 1000000; i++) {
                // enforce timestamp order
                JournalEntryWriter ew = writer.entryWriter(timestamp);
                // columns accessed by index
                ew.putInt(0, rnd.nextPositiveInt());
                ew.putStr(1, rnd.nextChars(25));
                // increment timestamp by 30 seconds
                timestamp += 30000;
                // append record to journal
                ew.append();
            }
            // commit all records at once
            // there is no limit on how many records can be in the same transaction
            writer.commit();
        }
    }
}

Example 3 with Rnd

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

the class NumbersTest method setUp.

@Before
public void setUp() {
    rnd = new Rnd();
    sink.clear();
}

Example 4 with Rnd

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

the class NumbersTest method testRoundUp.

@Test
public void testRoundUp() throws Exception {
    Assert.assertEquals(-0.2345678098023, Numbers.roundUp(-0.234567809802242442424242423122388, 13), 1E-14);
    Assert.assertEquals(0.2345678098023, Numbers.roundUp(0.234567809802242442424242423122388, 13), 1E-14);
    Rnd rnd = new Rnd();
    for (int i = 0; i < 1000; i++) {
        double d = rnd.nextDouble();
        double n = Numbers.roundUp(d, 8);
        Assert.assertTrue(d + " " + n + " " + (n - d - 1E-8), n - d - 1E-8 < Numbers.TOLERANCE);
    }
}

Example 5 with Rnd

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

the class GenericBinaryTest method getBytes.

private List<byte[]> getBytes() {
    Rnd r = new Rnd();
    List<byte[]> bytes = new ArrayList<>();
    for (int i = 0; i < 3; i++) {
        bytes.add(r.nextBytes((3 - i) * 1024));
    }
    return bytes;
}