Examples with ExcerptTailer net.openhft.chronicle.queue.ExcerptTailer used on opensource projects

Example 1 with ExcerptTailer

use of net.openhft.chronicle.queue.ExcerptTailer in project Chronicle-Queue by OpenHFT.

the class StoreTailerTest method shouldHandleCycleRollWhenInReadOnlyMode.

@Test
public void shouldHandleCycleRollWhenInReadOnlyMode() throws Exception {
    final MutableTimeProvider timeProvider = new MutableTimeProvider();
    final SingleChronicleQueue queue = build(createQueue(dataDirectory, RollCycles.MINUTELY, 0, "cycleRoll", false).timeProvider(timeProvider));
    final StringEvents events = queue.acquireAppender().methodWriterBuilder(StringEvents.class).build();
    timeProvider.setTime(System.currentTimeMillis());
    events.onEvent("firstEvent");
    timeProvider.addTime(2, TimeUnit.MINUTES);
    events.onEvent("secondEvent");
    final SingleChronicleQueue readerQueue = build(createQueue(dataDirectory, RollCycles.MINUTELY, 0, "cycleRoll", true).timeProvider(timeProvider));
    final ExcerptTailer tailer = readerQueue.createTailer();
    tailer.toStart();
    try (final DocumentContext context = tailer.readingDocument()) {
        assertThat(context.isPresent(), is(true));
    }
    tailer.toEnd();
    try (final DocumentContext context = tailer.readingDocument()) {
        assertThat(context.isPresent(), is(false));
    }
}

Example 2 with ExcerptTailer

use of net.openhft.chronicle.queue.ExcerptTailer in project Chronicle-Queue by OpenHFT.

the class TestBinarySearch method testBinarySearch.

@Test
public void testBinarySearch() throws ParseException {
    final SetTimeProvider stp = new SetTimeProvider();
    long time = 0;
    stp.currentTimeMillis(time);
    final File tmpDir = getTmpDir();
    try (SingleChronicleQueue queue = SingleChronicleQueueBuilder.binary(getTmpDir()).rollCycle(RollCycles.TEST_SECONDLY).timeProvider(stp).build()) {
        final ExcerptAppender appender = queue.acquireAppender();
        for (int i = 0; i < MAX_NUMBER_OF_TESTED_MESSAGES; i++) {
            try (final DocumentContext dc = appender.writingDocument()) {
                final MyData myData = new MyData();
                myData.key = i;
                myData.value = "some value where the key=" + String.valueOf(i);
                dc.wire().getValueOut().typedMarshallable(myData);
                time += 300;
                stp.currentTimeMillis(time);
            }
        }
        for (int j = 0; j < MAX_NUMBER_OF_TESTED_MESSAGES; j++) {
            Wire key = toWire(j);
            final Comparator<Wire> comparator = (o1, o2) -> {
                final long readPositionO1 = o1.bytes().readPosition();
                final long readPositionO2 = o2.bytes().readPosition();
                try {
                    MyData myDataO1 = null;
                    MyData myDataO2 = null;
                    try (final DocumentContext dc = o1.readingDocument()) {
                        myDataO1 = dc.wire().getValueIn().typedMarshallable();
                        assert myDataO1.value != null;
                    }
                    try (final DocumentContext dc = o2.readingDocument()) {
                        myDataO2 = dc.wire().getValueIn().typedMarshallable();
                        assert myDataO2.value != null;
                    }
                    final int compare = Integer.compare(myDataO1.key, myDataO2.key);
                    return compare;
                } finally {
                    o1.bytes().readPosition(readPositionO1);
                    o2.bytes().readPosition(readPositionO2);
                }
            };
            long index = BinarySearch.search(queue, key, comparator);
            // assert index != -1 : "i=" + j;
            final ExcerptTailer tailer = queue.createTailer();
            tailer.moveToIndex(index);
            try (final DocumentContext documentContext = tailer.readingDocument()) {
                Assert.assertTrue(documentContext.toString().contains("some value where the key=" + j));
            }
            key.bytes().release();
        }
    } finally {
        System.gc();
        deleteDir(tmpDir);
    }
}

Example 3 with ExcerptTailer

use of net.openhft.chronicle.queue.ExcerptTailer in project Chronicle-Queue by OpenHFT.

the class TestWriteWhenCurrentCycleGotEOF method createQueueWithOnlyHeaderFile.

private void createQueueWithOnlyHeaderFile(File dir) {
    SingleChronicleQueue queue = SingleChronicleQueueBuilder.binary(dir).testBlockSize().build();
    queue.storeForCycle(queue.cycle(), queue.epoch(), true);
    ExcerptTailer tailer = queue.acquireTailer();
    try (DocumentContext dc = tailer.readingDocument()) {
        assertFalse(dc.isPresent());
    }
    Wire wire;
    ExcerptAppender excerptAppender = queue.acquireAppender();
    try (DocumentContext dc = excerptAppender.writingDocument()) {
        wire = dc.wire();
    }
    // overwrite last record with EOF
    Bytes<?> bytes = wire.bytes();
    bytes.writeVolatileInt(bytes.writePosition() - 5, Wires.END_OF_DATA);
    bytes.writeVolatileInt(bytes.writePosition() - 1, 0);
}

Example 4 with ExcerptTailer

use of net.openhft.chronicle.queue.ExcerptTailer in project Chronicle-Queue by OpenHFT.

the class ToEndTest method toEndTest.

@Test
public void toEndTest() {
    File baseDir = DirectoryUtils.tempDir("toEndTest");
    List<Integer> results = new ArrayList<>();
    final SingleChronicleQueue singleChronicleQueue = null;
    try (RollingChronicleQueue queue = SingleChronicleQueueBuilder.binary(baseDir).testBlockSize().rollCycle(RollCycles.TEST_DAILY).indexCount(8).indexSpacing(1).build()) {
        checkOneFile(baseDir);
        ExcerptAppender appender = queue.acquireAppender();
        checkOneFile(baseDir);
        for (int i = 0; i < 10; i++) {
            final int j = i;
            appender.writeDocument(wire -> wire.write(() -> "msg").int32(j));
        }
        checkOneFile(baseDir);
        ExcerptTailer tailer = queue.createTailer();
        checkOneFile(baseDir);
        ExcerptTailer atEnd = tailer.toEnd();
        assertEquals(10, queue.rollCycle().toSequenceNumber(atEnd.index()));
        checkOneFile(baseDir);
        fillResults(atEnd, results);
        checkOneFile(baseDir);
        assertEquals(0, results.size());
        tailer.toStart();
        checkOneFile(baseDir);
        fillResults(tailer, results);
        assertEquals(10, results.size());
        checkOneFile(baseDir);
    }
    System.gc();
    try {
        IOTools.shallowDeleteDirWithFiles(baseDir);
    } catch (Exception e) {
        e.printStackTrace();
    }
}

Example 5 with ExcerptTailer

use of net.openhft.chronicle.queue.ExcerptTailer in project Chronicle-Queue by OpenHFT.

the class ToEndTest method toEndAfterWriteTest.

@Test
public void toEndAfterWriteTest() {
    File file = DirectoryUtils.tempDir("toEndAfterWriteTest");
    IOTools.shallowDeleteDirWithFiles(file);
    final SetTimeProvider stp = new SetTimeProvider();
    stp.currentTimeMillis(1470757797000L);
    try (RollingChronicleQueue wqueue = SingleChronicleQueueBuilder.binary(file).testBlockSize().rollCycle(RollCycles.TEST_SECONDLY).timeProvider(stp).build()) {
        ExcerptAppender appender = wqueue.acquireAppender();
        for (int i = 0; i < 10; i++) {
            try (DocumentContext dc = appender.writingDocument()) {
                dc.wire().write().text("hi-" + i);
                lastCycle = wqueue.rollCycle().toCycle(dc.index());
            }
            stp.currentTimeMillis(stp.currentTimeMillis() + 1000);
        }
    }
    try (ChronicleQueue rqueue = SingleChronicleQueueBuilder.binary(file).testBlockSize().rollCycle(RollCycles.TEST_SECONDLY).timeProvider(stp).build()) {
        ExcerptTailer tailer = rqueue.createTailer();
        stp.currentTimeMillis(stp.currentTimeMillis() + 1000);
        // noinspection StatementWithEmptyBody
        while (tailer.readText() != null) ;
        assertNull(tailer.readText());
        stp.currentTimeMillis(stp.currentTimeMillis() + 1000);
        ExcerptTailer tailer1 = rqueue.createTailer();
        ExcerptTailer excerptTailer = tailer1.toEnd();
        assertNull(excerptTailer.readText());
    }
    System.gc();
    IOTools.shallowDeleteDirWithFiles(file);
}