org.apache.nifi.util.RingBuffer Java Exaples

Source File: TestRingBuffer.java From localization_nifi with Apache License 2.0

6 votes

@Test
public void testIterateForwards() {
    final RingBuffer<Integer> ringBuffer = new RingBuffer<>(10);

    final int[] values = new int[]{3, 5, 20, 7};
    for (final int v : values) {
        ringBuffer.add(v);
    }

    final AtomicInteger countHolder = new AtomicInteger(0);
    ringBuffer.forEach(new ForEachEvaluator<Integer>() {
        int counter = 0;

        @Override
        public boolean evaluate(final Integer value) {
            final int expected = values[counter++];
            countHolder.incrementAndGet();
            assertEquals(expected, value.intValue());
            return true;
        }

    }, IterationDirection.FORWARD);

    assertEquals(4, countHolder.get());
}

Source File: VolatileBulletinRepository.java From nifi with Apache License 2.0

6 votes

@Override
public List<Bulletin> findBulletinsForGroupBySource(final String groupId, final int maxPerComponent) {
    final long fiveMinutesAgo = System.currentTimeMillis() - TimeUnit.MINUTES.toMillis(5);

    final ConcurrentMap<String, RingBuffer<Bulletin>> componentMap = bulletinStoreMap.get(groupId);
    if (componentMap == null) {
        return Collections.<Bulletin>emptyList();
    }

    final List<Bulletin> allComponentBulletins = new ArrayList<>();
    for (final RingBuffer<Bulletin> ringBuffer : componentMap.values()) {
        allComponentBulletins.addAll(ringBuffer.getSelectedElements(new Filter<Bulletin>() {
            @Override
            public boolean select(final Bulletin bulletin) {
                return bulletin.getTimestamp().getTime() >= fiveMinutesAgo;
            }
        }, maxPerComponent));
    }

    return allComponentBulletins;
}

Source File: VolatileProvenanceRepository.java From nifi with Apache License 2.0

6 votes

public VolatileProvenanceRepository(final NiFiProperties nifiProperties) {

        maxSize = nifiProperties.getIntegerProperty(BUFFER_SIZE, DEFAULT_BUFFER_SIZE);
        ringBuffer = new RingBuffer<>(maxSize);

        final String indexedFieldString = nifiProperties.getProperty(NiFiProperties.PROVENANCE_INDEXED_FIELDS);
        final String indexedAttrString = nifiProperties.getProperty(NiFiProperties.PROVENANCE_INDEXED_ATTRIBUTES);

        searchableFields = Collections.unmodifiableList(SearchableFieldParser.extractSearchableFields(indexedFieldString, true));
        searchableAttributes = Collections.unmodifiableList(SearchableFieldParser.extractSearchableFields(indexedAttrString, false));

        final ThreadFactory defaultThreadFactory = Executors.defaultThreadFactory();
        queryExecService = Executors.newFixedThreadPool(2, new ThreadFactory() {
            private final AtomicInteger counter = new AtomicInteger(0);

            @Override
            public Thread newThread(final Runnable r) {
                final Thread thread = defaultThreadFactory.newThread(r);
                thread.setName("Provenance Query Thread-" + counter.incrementAndGet());
                return thread;
            }
        });

        scheduledExecService = Executors.newScheduledThreadPool(2);
    }

Source File: VolatileProvenanceRepository.java From localization_nifi with Apache License 2.0

6 votes

public VolatileProvenanceRepository(final NiFiProperties nifiProperties) {

        final int bufferSize = nifiProperties.getIntegerProperty(BUFFER_SIZE, DEFAULT_BUFFER_SIZE);
        ringBuffer = new RingBuffer<>(bufferSize);

        final String indexedFieldString = nifiProperties.getProperty(NiFiProperties.PROVENANCE_INDEXED_FIELDS);
        final String indexedAttrString = nifiProperties.getProperty(NiFiProperties.PROVENANCE_INDEXED_ATTRIBUTES);

        searchableFields = Collections.unmodifiableList(SearchableFieldParser.extractSearchableFields(indexedFieldString, true));
        searchableAttributes = Collections.unmodifiableList(SearchableFieldParser.extractSearchableFields(indexedAttrString, false));

        final ThreadFactory defaultThreadFactory = Executors.defaultThreadFactory();
        queryExecService = Executors.newFixedThreadPool(2, new ThreadFactory() {
            private final AtomicInteger counter = new AtomicInteger(0);

            @Override
            public Thread newThread(final Runnable r) {
                final Thread thread = defaultThreadFactory.newThread(r);
                thread.setName("Provenance Query Thread-" + counter.incrementAndGet());
                return thread;
            }
        });

        scheduledExecService = Executors.newScheduledThreadPool(2);
    }

Source File: TestRingBuffer.java From nifi with Apache License 2.0

6 votes

@Test
public void testIterateForwards() {
    final RingBuffer<Integer> ringBuffer = new RingBuffer<>(10);

    final int[] values = new int[]{3, 5, 20, 7};
    for (final int v : values) {
        ringBuffer.add(v);
    }

    final AtomicInteger countHolder = new AtomicInteger(0);
    ringBuffer.forEach(new ForEachEvaluator<Integer>() {
        int counter = 0;

        @Override
        public boolean evaluate(final Integer value) {
            final int expected = values[counter++];
            countHolder.incrementAndGet();
            assertEquals(expected, value.intValue());
            return true;
        }

    }, IterationDirection.FORWARD);

    assertEquals(4, countHolder.get());
}

Source File: VolatileBulletinRepository.java From localization_nifi with Apache License 2.0

6 votes

@Override
public List<Bulletin> findBulletinsForGroupBySource(final String groupId, final int maxPerComponent) {
    final long fiveMinutesAgo = System.currentTimeMillis() - TimeUnit.MINUTES.toMillis(5);

    final ConcurrentMap<String, RingBuffer<Bulletin>> componentMap = bulletinStoreMap.get(groupId);
    if (componentMap == null) {
        return Collections.<Bulletin>emptyList();
    }

    final List<Bulletin> allComponentBulletins = new ArrayList<>();
    for (final RingBuffer<Bulletin> ringBuffer : componentMap.values()) {
        allComponentBulletins.addAll(ringBuffer.getSelectedElements(new Filter<Bulletin>() {
            @Override
            public boolean select(final Bulletin bulletin) {
                return bulletin.getTimestamp().getTime() >= fiveMinutesAgo;
            }
        }, maxPerComponent));
    }

    return allComponentBulletins;
}

Source File: TestRingBuffer.java From localization_nifi with Apache License 2.0

5 votes

@Test
public void testAsList() {
    final RingBuffer<Integer> ringBuffer = new RingBuffer<>(10);

    final List<Integer> emptyList = ringBuffer.asList();
    assertTrue(emptyList.isEmpty());

    for (int i = 0; i < 3; i++) {
        ringBuffer.add(i);
    }

    List<Integer> list = ringBuffer.asList();
    assertEquals(3, list.size());
    for (int i = 0; i < 3; i++) {
        assertEquals(Integer.valueOf(i), list.get(i));
    }

    for (int i = 3; i < 10; i++) {
        ringBuffer.add(i);
    }

    list = ringBuffer.asList();
    assertEquals(10, list.size());
    for (int i = 0; i < 10; i++) {
        assertEquals(Integer.valueOf(i), list.get(i));
    }
}

Source File: VolatileBulletinRepository.java From nifi with Apache License 2.0

5 votes

@Override
public List<Bulletin> findBulletinsForController(final int max) {
    final long fiveMinutesAgo = System.currentTimeMillis() - TimeUnit.MINUTES.toMillis(5);

    final Filter<Bulletin> filter = new Filter<Bulletin>() {
        @Override
        public boolean select(final Bulletin bulletin) {
            return bulletin.getTimestamp().getTime() >= fiveMinutesAgo;
        }
    };

    final List<Bulletin> controllerBulletins = new ArrayList<>();

    final ConcurrentMap<String, RingBuffer<Bulletin>> controllerBulletinMap = bulletinStoreMap.get(CONTROLLER_BULLETIN_STORE_KEY);
    if (controllerBulletinMap != null) {
        final RingBuffer<Bulletin> buffer = controllerBulletinMap.get(CONTROLLER_BULLETIN_STORE_KEY);
        if (buffer != null) {
            controllerBulletins.addAll(buffer.getSelectedElements(filter, max));
        }
    }

    // We only want the newest bulletin, so we sort based on time and take the top 'max' entries
    Collections.sort(controllerBulletins);
    if (controllerBulletins.size() > max) {
        return controllerBulletins.subList(0, max);
    }

    return controllerBulletins;
}

Source File: LatestEventsPerProcessorQuery.java From nifi with Apache License 2.0

5 votes

@Override
public Optional<List<Long>> evaluate(final Query query) {
    if (query.getMaxResults() > 1000) {
        // If query max results > 1000 then we know we don't have enough results. So just return empty.
        return Optional.empty();
    }

    final List<SearchTerm> terms = query.getSearchTerms();
    if (terms.size() != 1) {
        return Optional.empty();
    }

    final SearchTerm term = terms.get(0);
    if (!COMPONENT_ID_FIELD_NAME.equals(term.getSearchableField().getSearchableFieldName())) {
        return Optional.empty();
    }

    if (query.getEndDate() != null || query.getStartDate() != null) {
        return Optional.empty();
    }

    final RingBuffer<Long> ringBuffer = latestRecords.get(term.getValue());
    if (ringBuffer == null || ringBuffer.getSize() < query.getMaxResults()) {
        return Optional.empty();
    }

    List<Long> eventIds = ringBuffer.asList();
    if (eventIds.size() > query.getMaxResults()) {
        eventIds = eventIds.subList(0, query.getMaxResults());
    }

    return Optional.of(eventIds);
}

Source File: TestRingBuffer.java From nifi with Apache License 2.0

5 votes

@Test
public void testIterateBackwardsAfterFull() {
    final RingBuffer<Integer> ringBuffer = new RingBuffer<>(10);

    for (int i = 0; i < 12; i++) {
        ringBuffer.add(i);
    }

    final int[] values = new int[]{3, 5, 20, 7};
    for (final int v : values) {
        ringBuffer.add(v);
    }

    ringBuffer.forEach(new ForEachEvaluator<Integer>() {
        int counter = 0;

        @Override
        public boolean evaluate(final Integer value) {
            if (counter < values.length) {
                final int index = values.length - 1 - counter;
                final int expected = values[index];

                assertEquals(expected, value.intValue());
                counter++;
            }

            return true;
        }

    }, IterationDirection.BACKWARD);
}

Source File: TestRingBuffer.java From nifi with Apache License 2.0

5 votes

@Test
public void testIterateBackwards() {
    final RingBuffer<Integer> ringBuffer = new RingBuffer<>(10);

    final int[] values = new int[]{3, 5, 20, 7};
    for (final int v : values) {
        ringBuffer.add(v);
    }

    final AtomicInteger countHolder = new AtomicInteger(0);
    ringBuffer.forEach(new ForEachEvaluator<Integer>() {
        int counter = 0;

        @Override
        public boolean evaluate(final Integer value) {
            final int index = values.length - 1 - counter;
            final int expected = values[index];
            countHolder.incrementAndGet();

            assertEquals(expected, value.intValue());
            counter++;
            return true;
        }

    }, IterationDirection.BACKWARD);

    assertEquals(4, countHolder.get());
}

Source File: TestRingBuffer.java From nifi with Apache License 2.0

5 votes

@Test
public void testIterateForwardsAfterFull() {
    final RingBuffer<Integer> ringBuffer = new RingBuffer<>(10);

    for (int i = 0; i < 12; i++) {
        ringBuffer.add(i);
    }

    final int[] values = new int[]{3, 5, 20, 7};
    for (final int v : values) {
        ringBuffer.add(v);
    }

    ringBuffer.forEach(new ForEachEvaluator<Integer>() {
        int counter = 0;

        @Override
        public boolean evaluate(final Integer value) {
            if (counter < 6) {
                assertEquals(counter + 6, value.intValue());
            } else {
                final int expected = values[counter - 6];
                assertEquals(expected, value.intValue());
            }

            counter++;
            return true;
        }

    }, IterationDirection.FORWARD);
}

Source File: TestRingBuffer.java From nifi with Apache License 2.0

5 votes

@Test
public void testAsList() {
    final RingBuffer<Integer> ringBuffer = new RingBuffer<>(10);

    final List<Integer> emptyList = ringBuffer.asList();
    assertTrue(emptyList.isEmpty());

    for (int i = 0; i < 3; i++) {
        ringBuffer.add(i);
    }

    List<Integer> list = ringBuffer.asList();
    assertEquals(3, list.size());
    for (int i = 0; i < 3; i++) {
        assertEquals(Integer.valueOf(i), list.get(i));
    }

    for (int i = 3; i < 10; i++) {
        ringBuffer.add(i);
    }

    list = ringBuffer.asList();
    assertEquals(10, list.size());
    for (int i = 0; i < 10; i++) {
        assertEquals(Integer.valueOf(i), list.get(i));
    }
}

Source File: TestRingBuffer.java From nifi with Apache License 2.0

5 votes

@Test
public void testGetNewestElement() {
    final RingBuffer<Integer> ringBuffer = new RingBuffer<>(10);

    for (int i = 0; i < 11; i++) {
        ringBuffer.add(i);
        assertEquals(i, ringBuffer.getNewestElement().intValue());
    }
}

Source File: VolatileBulletinRepository.java From localization_nifi with Apache License 2.0

5 votes

@Override
public List<Bulletin> findBulletinsForController(final int max) {
    final long fiveMinutesAgo = System.currentTimeMillis() - TimeUnit.MINUTES.toMillis(5);

    final Filter<Bulletin> filter = new Filter<Bulletin>() {
        @Override
        public boolean select(final Bulletin bulletin) {
            return bulletin.getTimestamp().getTime() >= fiveMinutesAgo;
        }
    };

    final List<Bulletin> controllerBulletins = new ArrayList<>();

    final ConcurrentMap<String, RingBuffer<Bulletin>> controllerBulletinMap = bulletinStoreMap.get(CONTROLLER_BULLETIN_STORE_KEY);
    if (controllerBulletinMap != null) {
        final RingBuffer<Bulletin> buffer = controllerBulletinMap.get(CONTROLLER_BULLETIN_STORE_KEY);
        if (buffer != null) {
            controllerBulletins.addAll(buffer.getSelectedElements(filter, max));
        }
    }

    // We only want the newest bulletin, so we sort based on time and take the top 'max' entries
    Collections.sort(controllerBulletins);
    if (controllerBulletins.size() > max) {
        return controllerBulletins.subList(0, max);
    }

    return controllerBulletins;
}

Source File: TestRingBuffer.java From localization_nifi with Apache License 2.0

5 votes

@Test
public void testGetNewestElement() {
    final RingBuffer<Integer> ringBuffer = new RingBuffer<>(10);

    for (int i = 0; i < 11; i++) {
        ringBuffer.add(i);
        assertEquals(i, ringBuffer.getNewestElement().intValue());
    }
}

Source File: TestRingBuffer.java From localization_nifi with Apache License 2.0

5 votes

@Test
public void testIterateForwardsAfterFull() {
    final RingBuffer<Integer> ringBuffer = new RingBuffer<>(10);

    for (int i = 0; i < 12; i++) {
        ringBuffer.add(i);
    }

    final int[] values = new int[]{3, 5, 20, 7};
    for (final int v : values) {
        ringBuffer.add(v);
    }

    ringBuffer.forEach(new ForEachEvaluator<Integer>() {
        int counter = 0;

        @Override
        public boolean evaluate(final Integer value) {
            if (counter < 6) {
                assertEquals(counter + 6, value.intValue());
            } else {
                final int expected = values[counter - 6];
                assertEquals(expected, value.intValue());
            }

            counter++;
            return true;
        }

    }, IterationDirection.FORWARD);
}

Source File: LatestEventsPerProcessorQuery.java From localization_nifi with Apache License 2.0

5 votes

@Override
public Optional<List<Long>> evaluate(final Query query) {
    if (query.getMaxResults() > 1000) {
        // If query max results > 1000 then we know we don't have enough results. So just return empty.
        return Optional.empty();
    }

    final List<SearchTerm> terms = query.getSearchTerms();
    if (terms.size() != 1) {
        return Optional.empty();
    }

    final SearchTerm term = terms.get(0);
    if (!COMPONENT_ID_FIELD_NAME.equals(term.getSearchableField().getSearchableFieldName())) {
        return Optional.empty();
    }

    if (query.getEndDate() != null || query.getStartDate() != null) {
        return Optional.empty();
    }

    final RingBuffer<Long> ringBuffer = latestRecords.get(term.getValue());
    if (ringBuffer == null || ringBuffer.getSize() < query.getMaxResults()) {
        return Optional.empty();
    }

    List<Long> eventIds = ringBuffer.asList();
    if (eventIds.size() > query.getMaxResults()) {
        eventIds = eventIds.subList(0, query.getMaxResults());
    }

    return Optional.of(eventIds);
}

Source File: TestRingBuffer.java From localization_nifi with Apache License 2.0

5 votes

@Test
public void testIterateBackwardsAfterFull() {
    final RingBuffer<Integer> ringBuffer = new RingBuffer<>(10);

    for (int i = 0; i < 12; i++) {
        ringBuffer.add(i);
    }

    final int[] values = new int[]{3, 5, 20, 7};
    for (final int v : values) {
        ringBuffer.add(v);
    }

    ringBuffer.forEach(new ForEachEvaluator<Integer>() {
        int counter = 0;

        @Override
        public boolean evaluate(final Integer value) {
            if (counter < values.length) {
                final int index = values.length - 1 - counter;
                final int expected = values[index];

                assertEquals(expected, value.intValue());
                counter++;
            }

            return true;
        }

    }, IterationDirection.BACKWARD);
}

Source File: TestRingBuffer.java From localization_nifi with Apache License 2.0

5 votes

@Test
public void testIterateBackwards() {
    final RingBuffer<Integer> ringBuffer = new RingBuffer<>(10);

    final int[] values = new int[]{3, 5, 20, 7};
    for (final int v : values) {
        ringBuffer.add(v);
    }

    final AtomicInteger countHolder = new AtomicInteger(0);
    ringBuffer.forEach(new ForEachEvaluator<Integer>() {
        int counter = 0;

        @Override
        public boolean evaluate(final Integer value) {
            final int index = values.length - 1 - counter;
            final int expected = values[index];
            countHolder.incrementAndGet();

            assertEquals(expected, value.intValue());
            counter++;
            return true;
        }

    }, IterationDirection.BACKWARD);

    assertEquals(4, countHolder.get());
}

Source File: VolatileBulletinRepository.java From nifi with Apache License 2.0

4 votes

@Override
public void update(final Bulletin bulletin) {
    for (final RingBuffer<Bulletin> bulletinBuffer : getBulletinBuffers(bulletin)) {
        bulletinBuffer.add(bulletin);
    }
}

Source File: VolatileBulletinRepository.java From nifi with Apache License 2.0

4 votes

@Override
public List<Bulletin> findBulletins(final BulletinQuery bulletinQuery) {
    final Filter<Bulletin> filter = new Filter<Bulletin>() {
        @Override
        public boolean select(final Bulletin bulletin) {
            final long fiveMinutesAgo = System.currentTimeMillis() - TimeUnit.MINUTES.toMillis(5);
            if (bulletin.getTimestamp().getTime() < fiveMinutesAgo) {
                return false;
            }

            // only include bulletins after the specified id
            if (bulletinQuery.getAfter() != null && bulletin.getId() <= bulletinQuery.getAfter()) {
                return false;
            }

            // if group pattern was specified see if it should be excluded
            if (bulletinQuery.getGroupIdPattern() != null) {
                // exclude if this bulletin doesnt have a group or if it doesnt match
                if (bulletin.getGroupId() == null || !bulletinQuery.getGroupIdPattern().matcher(bulletin.getGroupId()).find()) {
                    return false;
                }
            }

            // if a message pattern was specified see if it should be excluded
            if (bulletinQuery.getMessagePattern() != null) {
                // exclude if this bulletin doesnt have a message or if it doesnt match
                if (bulletin.getMessage() == null || !bulletinQuery.getMessagePattern().matcher(bulletin.getMessage()).find()) {
                    return false;
                }
            }

            // if a name pattern was specified see if it should be excluded
            if (bulletinQuery.getNamePattern() != null) {
                // exclude if this bulletin doesnt have a source name or if it doesnt match
                if (bulletin.getSourceName() == null || !bulletinQuery.getNamePattern().matcher(bulletin.getSourceName()).find()) {
                    return false;
                }
            }

            // if a source id was specified see if it should be excluded
            if (bulletinQuery.getSourceIdPattern() != null) {
                // exclude if this bulletin doesn't have a source id or if it doesn't match
                if (bulletin.getSourceId() == null || !bulletinQuery.getSourceIdPattern().matcher(bulletin.getSourceId()).find()) {
                    return false;
                }
            }

            // if a source component type was specified see if it should be excluded
            if (bulletinQuery.getSourceType() != null) {
                // exclude if this bulletin source type doesn't match
                if (bulletin.getSourceType() == null || !bulletinQuery.getSourceType().equals(bulletin.getSourceType())) {
                    return false;
                }
            }

            return true;
        }
    };

    final Set<Bulletin> selected = new TreeSet<>();
    int max = bulletinQuery.getLimit() == null ? Integer.MAX_VALUE : bulletinQuery.getLimit();

    for (final ConcurrentMap<String, RingBuffer<Bulletin>> componentMap : bulletinStoreMap.values()) {
        for (final RingBuffer<Bulletin> ringBuffer : componentMap.values()) {
            final List<Bulletin> bulletinsForComponent = ringBuffer.getSelectedElements(filter, max);
            selected.addAll(bulletinsForComponent);
            max -= bulletinsForComponent.size();
            if (max <= 0) {
                break;
            }
        }
    }

    return new ArrayList<>(selected);
}

Source File: RingBufferGarbageCollectionLog.java From nifi with Apache License 2.0

4 votes

public RingBufferGarbageCollectionLog(final int eventCount, final long minDurationThreshold) {
    this.events = new RingBuffer<>(eventCount);
    this.minDurationThreshold = minDurationThreshold;
    jvmStartTime = ManagementFactory.getRuntimeMXBean().getStartTime();
}

Source File: VolatileComponentStatusRepository.java From nifi with Apache License 2.0

4 votes

public VolatileComponentStatusRepository(final NiFiProperties nifiProperties) {
    numDataPoints = nifiProperties.getIntegerProperty(NUM_DATA_POINTS_PROPERTY, DEFAULT_NUM_DATA_POINTS);
    gcStatuses = new RingBuffer<>(numDataPoints);
    timestamps = new RingBuffer<>(numDataPoints);
}

Source File: VolatileProvenanceRepository.java From nifi with Apache License 2.0

4 votes

public ComputeLineageRunnable(final RingBuffer<ProvenanceEventRecord> ringBuffer, final Filter<ProvenanceEventRecord> filter, final AsyncLineageSubmission submission) {
    this.ringBuffer = ringBuffer;
    this.filter = filter;
    this.submission = submission;
}

Source File: VolatileProvenanceRepository.java From nifi with Apache License 2.0

4 votes

public QueryRunnable(final RingBuffer<ProvenanceEventRecord> ringBuffer, final Filter<ProvenanceEventRecord> filter, final int maxRecords, final AsyncQuerySubmission submission) {
    this.ringBuffer = ringBuffer;
    this.filter = filter;
    this.submission = submission;
    this.maxRecords = maxRecords;
}

Source File: LatestEventsPerProcessorQuery.java From nifi with Apache License 2.0

4 votes

@Override
public void update(final ProvenanceEventRecord event, final StorageSummary storageSummary) {
    final String componentId = event.getComponentId();
    final RingBuffer<Long> ringBuffer = latestRecords.computeIfAbsent(componentId, id -> new RingBuffer<>(1000));
    ringBuffer.add(storageSummary.getEventId());
}

Source File: LatestEventsPerProcessorQuery.java From localization_nifi with Apache License 2.0

4 votes

@Override
public void update(final ProvenanceEventRecord event, final StorageSummary storageSummary) {
    final String componentId = event.getComponentId();
    final RingBuffer<Long> ringBuffer = latestRecords.computeIfAbsent(componentId, id -> new RingBuffer<>(1000));
    ringBuffer.add(storageSummary.getEventId());
}

Source File: VolatileProvenanceRepository.java From localization_nifi with Apache License 2.0

4 votes

public QueryRunnable(final RingBuffer<ProvenanceEventRecord> ringBuffer, final Filter<ProvenanceEventRecord> filter, final int maxRecords, final AsyncQuerySubmission submission) {
    this.ringBuffer = ringBuffer;
    this.filter = filter;
    this.submission = submission;
    this.maxRecords = maxRecords;
}

Source File: VolatileProvenanceRepository.java From localization_nifi with Apache License 2.0

4 votes

public ComputeLineageRunnable(final RingBuffer<ProvenanceEventRecord> ringBuffer, final Filter<ProvenanceEventRecord> filter, final AsyncLineageSubmission submission) {
    this.ringBuffer = ringBuffer;
    this.filter = filter;
    this.submission = submission;
}

org.apache.nifi.util.RingBuffer Java Examples