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

Example 61 with Rnd

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

the class SymbolMapTest method testRollback.

@Test
public void testRollback() throws Exception {
    TestUtils.assertMemoryLeak(() -> {
        int N = 1024;
        try (Path path = new Path().of(configuration.getRoot())) {
            create(path, "x", N, true);
            try (SymbolMapWriter writer = new SymbolMapWriter(configuration, path, "x", 0)) {
                Rnd rnd = new Rnd();
                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);
                    Assert.assertEquals(key, writer.put(cs));
                    prev = key;
                }
                writer.rollback(N / 2);
                prev = N / 2 - 1;
                for (int i = 0; i < N; i++) {
                    CharSequence cs = rnd.nextChars(10);
                    long key = writer.put(cs);
                    Assert.assertEquals(prev + 1, key);
                    Assert.assertEquals(key, writer.put(cs));
                    prev = key;
                }
            }
        }
    });
}

Example 62 with Rnd

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

the class SymbolMapTest method testTransactionalRead.

@Test
public void testTransactionalRead() 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.assertNull(reader.value(N));
                    Assert.assertEquals(SymbolTable.VALUE_NOT_FOUND, reader.getQuick("hola"));
                    Assert.assertEquals(N, writer.put("XYZ"));
                    // must not be able to read new symbol
                    Assert.assertNull(reader.value(N));
                    Assert.assertEquals(SymbolTable.VALUE_NOT_FOUND, reader.getQuick("XYZ"));
                    reader.updateSymbolCount(N + 1);
                    TestUtils.assertEquals("XYZ", reader.value(N));
                    Assert.assertEquals(N, reader.getQuick("XYZ"));
                }
            }
        }
    });
}

Example 63 with Rnd

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

the class SymbolMapTest method testAppend.

@Test
public void testAppend() throws Exception {
    TestUtils.assertMemoryLeak(() -> {
        int N = 1000;
        try (Path path = new Path().of(configuration.getRoot())) {
            create(path, "x", N, true);
            Rnd rnd = new Rnd();
            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);
                    Assert.assertEquals(key, writer.put(cs));
                    prev = key;
                }
            }
            try (SymbolMapWriter writer = new SymbolMapWriter(configuration, path, "x", N)) {
                long prev = N - 1;
                // append second batch and check that symbol keys start with N
                for (int i = 0; i < N; i++) {
                    CharSequence cs = rnd.nextChars(10);
                    long key = writer.put(cs);
                    Assert.assertEquals(prev + 1, key);
                    Assert.assertEquals(key, writer.put(cs));
                    prev = key;
                }
                // try append first batch - this should return symbol keys starting with 0
                rnd.reset();
                prev = -1;
                for (int i = 0; i < N; i++) {
                    CharSequence cs = rnd.nextChars(10);
                    long key = writer.put(cs);
                    Assert.assertEquals(prev + 1, key);
                    prev = key;
                }
                Assert.assertEquals(SymbolTable.VALUE_IS_NULL, writer.put(null));
            }
        }
    });
}

Example 64 with Rnd

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

the class SymbolMapTest method testSimpleAdd.

@Test
public void testSimpleAdd() throws Exception {
    TestUtils.assertMemoryLeak(() -> {
        int N = 1000000;
        try (Path path = new Path().of(configuration.getRoot())) {
            create(path, "x", N, false);
            try (SymbolMapWriter writer = new SymbolMapWriter(configuration, path, "x", 0)) {
                Rnd rnd = new Rnd();
                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);
                    Assert.assertEquals(key, writer.put(cs));
                    prev = key;
                }
            }
        }
    });
}

Example 65 with Rnd

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

the class TableReadFailTest method testReloadTimeout.

@Test
public void testReloadTimeout() throws Exception {
    TestUtils.assertMemoryLeak(() -> {
        try (TableModel model = new TableModel(configuration, "x", PartitionBy.NONE).col("a", ColumnType.INT).col("b", ColumnType.LONG).timestamp()) {
            CairoTestUtils.create(model);
        }
        try (Path path = new Path();
            TableReader reader = new TableReader(configuration, "x");
            ReadWriteMemory mem = new ReadWriteMemory()) {
            final Rnd rnd = new Rnd();
            final int N = 1000;
            // home path at txn file
            path.of(configuration.getRoot()).concat("x").concat(TableUtils.TXN_FILE_NAME).$();
            try (TableWriter w = new TableWriter(configuration, "x")) {
                for (int i = 0; i < N; i++) {
                    TableWriter.Row r = w.newRow(0);
                    r.putInt(0, rnd.nextInt());
                    r.putLong(1, rnd.nextLong());
                    r.append();
                }
                w.commit();
            }
            Assert.assertTrue(reader.reload());
            RecordCursor cursor = reader.getCursor();
            rnd.reset();
            int count = 0;
            while (cursor.hasNext()) {
                Record r = cursor.next();
                Assert.assertEquals(rnd.nextInt(), r.getInt(0));
                Assert.assertEquals(rnd.nextLong(), r.getLong(1));
                count++;
            }
            Assert.assertEquals(N, count);
            mem.of(configuration.getFilesFacade(), path, configuration.getFilesFacade().getPageSize());
            // keep txn file parameters
            long offset = configuration.getFilesFacade().length(mem.getFd());
            long txn = mem.getLong(TableUtils.TX_OFFSET_TXN);
            // corrupt the txn file
            mem.jumpTo(TableUtils.TX_OFFSET_TXN);
            mem.putLong(123);
            mem.jumpTo(offset);
            mem.close();
            // this should time out
            try {
                reader.reload();
                Assert.fail();
            } catch (CairoException e) {
                TestUtils.assertContains(e.getMessage(), "timeout");
            }
            // restore txn file to its former glory
            mem.of(configuration.getFilesFacade(), path, configuration.getFilesFacade().getPageSize());
            mem.jumpTo(TableUtils.TX_OFFSET_TXN);
            mem.putLong(txn);
            mem.jumpTo(offset);
            mem.close();
            mem.close();
            // make sure reload functions correctly
            Assert.assertFalse(reader.reload());
            try (TableWriter w = new TableWriter(configuration, "x")) {
                // add more data
                for (int i = 0; i < N; i++) {
                    TableWriter.Row r = w.newRow(0);
                    r.putInt(0, rnd.nextInt());
                    r.putLong(1, rnd.nextLong());
                    r.append();
                }
                w.commit();
            }
            // does positive reload work?
            Assert.assertTrue(reader.reload());
            // can reader still see correct data?
            cursor = reader.getCursor();
            rnd.reset();
            count = 0;
            while (cursor.hasNext()) {
                Record r = cursor.next();
                Assert.assertEquals(rnd.nextInt(), r.getInt(0));
                Assert.assertEquals(rnd.nextLong(), r.getLong(1));
                count++;
            }
            Assert.assertEquals(2 * N, count);
        }
    });
}