wz2cool / local-queue / #40

Committed 02 Feb 2025 02:03PM UTC coverage: 91.757% (-0.09%) from 91.85%

Build # #40

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/src/main/java/com/github/wz2cool/localqueue/impl/SimpleConsumer.java

package com.github.wz2cool.localqueue.impl;

import com.github.wz2cool.localqueue.IConsumer;
import com.github.wz2cool.localqueue.event.CloseListener;
import com.github.wz2cool.localqueue.helper.ChronicleQueueHelper;
import com.github.wz2cool.localqueue.model.config.SimpleConsumerConfig;
import com.github.wz2cool.localqueue.model.enums.ConsumeFromWhere;
import com.github.wz2cool.localqueue.model.message.InternalReadMessage;
import com.github.wz2cool.localqueue.model.message.QueueMessage;
import net.openhft.chronicle.core.time.TimeProvider;
import net.openhft.chronicle.queue.ChronicleQueue;
import net.openhft.chronicle.queue.ExcerptTailer;
import net.openhft.chronicle.queue.RollCycle;
import net.openhft.chronicle.queue.impl.single.SingleChronicleQueue;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.util.ArrayList;
import java.util.List;
import java.util.Objects;
import java.util.Optional;
import java.util.concurrent.*;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;

/**
 * simple consumer
 *
 * @author frank
 */
public class SimpleConsumer implements IConsumer {

    private final Logger logger = LoggerFactory.getLogger(this.getClass());
    private final RollCycle defaultRollCycle;
    private final TimeProvider timeProvider;
    private final SimpleConsumerConfig config;
    private final PositionStore positionStore;
    private final SingleChronicleQueue queue;
    // should only call by readCacheExecutor
    private final ExcerptTailer mainTailer;
    private final ExecutorService readCacheExecutor = Executors.newSingleThreadExecutor();
    private final ScheduledExecutorService scheduler = Executors.newScheduledThreadPool(1);
    private final LinkedBlockingQueue<QueueMessage> messageCache;
    private final ConcurrentLinkedQueue<CloseListener> closeListenerList = new ConcurrentLinkedQueue<>();
    private volatile long ackedReadPosition = -1;
    private volatile boolean isReadToCacheRunning = true;
    private volatile boolean isClosing = false;
    private volatile boolean isClosed = false;
    private final AtomicInteger positionVersion = new AtomicInteger(0);
    private final Lock internalLock = new ReentrantLock();

    /**
     * constructor
     *
     * @param config the config of consumer
     */
    public SimpleConsumer(final SimpleConsumerConfig config) {
        this.config = config;
        this.timeProvider = ChronicleQueueHelper.getTimeProvider(config.getTimeZone());
        this.messageCache = new LinkedBlockingQueue<>(config.getCacheSize());
        this.positionStore = new PositionStore(config.getPositionFile());
        this.defaultRollCycle = ChronicleQueueHelper.getRollCycle(config.getRollCycleType());
        this.queue = ChronicleQueue.singleBuilder(config.getDataDir())
                .timeProvider(timeProvider)
                .rollCycle(defaultRollCycle)
                .build();
        this.mainTailer = initMainTailer();
        startReadToCache();
        scheduler.scheduleAtFixedRate(this::flushPosition, 0, config.getFlushPositionInterval(), TimeUnit.MILLISECONDS);
    }

    @Override
    public synchronized QueueMessage take() throws InterruptedException {
        return this.messageCache.take();
    }

    @Override
    public synchronized List<QueueMessage> batchTake(int maxBatchSize) throws InterruptedException {
        List<QueueMessage> result = new ArrayList<>(maxBatchSize);
        QueueMessage take = this.messageCache.take();
        result.add(take);
        this.messageCache.drainTo(result, maxBatchSize - 1);
        return result;
    }

    @Override
    public synchronized Optional<QueueMessage> take(long timeout, TimeUnit unit) throws InterruptedException {
        QueueMessage message = this.messageCache.poll(timeout, unit);
        return Optional.ofNullable(message);
    }

    @Override
    public synchronized List<QueueMessage> batchTake(int maxBatchSize, long timeout, TimeUnit unit) throws InterruptedException {
        List<QueueMessage> result = new ArrayList<>(maxBatchSize);
        QueueMessage poll = this.messageCache.poll(timeout, unit);
        if (Objects.nonNull(poll)) {
            result.add(poll);
            this.messageCache.drainTo(result, maxBatchSize - 1);
        }
        return result;
    }

    @Override
    public synchronized Optional<QueueMessage> poll() {
        QueueMessage message = this.messageCache.poll();
        return Optional.ofNullable(message);
    }

    @Override
    public synchronized List<QueueMessage> batchPoll(int maxBatchSize) {
        List<QueueMessage> result = new ArrayList<>(maxBatchSize);
        this.messageCache.drainTo(result, maxBatchSize);
        return result;
    }

    @Override
    public synchronized void ack(final QueueMessage message) {
        if (Objects.isNull(message)) {
            return;
        }

        if (message.getPositionVersion() != positionVersion.get()) {
            return;
        }

        this.ackedReadPosition = message.getPosition();
    }

    @Override
    public synchronized void ack(final List<QueueMessage> messages) {
        if (Objects.isNull(messages) || messages.isEmpty()) {
            return;
        }
        QueueMessage lastOne = messages.get(messages.size() - 1);
        if (lastOne.getPositionVersion() != positionVersion.get()) {
            return;
        }
        this.ackedReadPosition = lastOne.getPosition();
    }

    @Override
    public boolean moveToPosition(final long position) {
        logDebug("[moveToPosition] start");
        stopReadToCache();
        try {
            internalLock.lock();
            return moveToPositionInternal(position);
        } finally {
            internalLock.unlock();
            startReadToCache();
            logDebug("[moveToPosition] end");
        }
    }

    @Override
    public boolean moveToTimestamp(final long timestamp) {
        logDebug("[moveToTimestamp] start, timestamp: {}", timestamp);
        stopReadToCache();
        try {
            internalLock.lock();
            Optional<Long> positionOptional = findPosition(timestamp);
            if (!positionOptional.isPresent()) {
                return false;
            }
            Long position = positionOptional.get();
            return moveToPositionInternal(position);
        } finally {
            internalLock.unlock();
            startReadToCache();
            logDebug("[moveToTimestamp] end");
        }
    }

    @Override
    public Optional<QueueMessage> get(final String messageKey) {
        return get(messageKey, 0L, Long.MAX_VALUE);
    }

    @Override
    public Optional<QueueMessage> get(final String messageKey, long searchTimestampStart, long searchTimestampEnd) {
        if (messageKey == null || messageKey.isEmpty()) {
            return Optional.empty();
        }
        try (ExcerptTailer tailer = queue.createTailer()) {
            moveToNearByTimestamp(tailer, searchTimestampStart);
            while (true) {
                // for performance, ignore read content.
                InternalReadMessage internalReadMessage = new InternalReadMessage(true);
                boolean readResult = tailer.readBytes(internalReadMessage);
                if (!readResult) {
                    return Optional.empty();
                }
                if (internalReadMessage.getWriteTime() < searchTimestampStart) {
                    continue;
                }
                if (internalReadMessage.getWriteTime() > searchTimestampEnd) {
                    return Optional.empty();
                }
                boolean moveToResult = tailer.moveToIndex(tailer.lastReadIndex());
                if (!moveToResult) {
                    return Optional.empty();
                }
                internalReadMessage = new InternalReadMessage();
                readResult = tailer.readBytes(internalReadMessage);
                if (!readResult) {
                    return Optional.empty();
                }
                QueueMessage queueMessage = toQueueMessage(internalReadMessage, tailer.lastReadIndex());
                if (Objects.equals(messageKey, queueMessage.getMessageKey())) {
                    return Optional.of(queueMessage);
                }
            }
        }
    }

    private QueueMessage toQueueMessage(final InternalReadMessage internalReadMessage, final long position) {
        return new QueueMessage(
                internalReadMessage.getMessageKey(),
                positionVersion.get(),
                position,
                internalReadMessage.getContent(),
                internalReadMessage.getWriteTime());
    }

    private boolean moveToPositionInternal(final long position) {
        return CompletableFuture.supplyAsync(() -> {
            try {
                logDebug("[moveToPositionInternal] start, position: {}", position);
                boolean moveToResult = mainTailer.moveToIndex(position);
                if (moveToResult) {
                    positionVersion.incrementAndGet();
                    messageCache.clear();
                    this.ackedReadPosition = position;
                }
                return moveToResult;
            } finally {
                logDebug("[moveToPositionInternal] end");
            }
        }, this.readCacheExecutor).join();
    }

    private Optional<Long> findPosition(final long timestamp) {
        logDebug("[findPosition] start, timestamp: {}", timestamp);
        try (ExcerptTailer tailer = queue.createTailer()) {
            moveToNearByTimestamp(tailer, timestamp);
            while (true) {
                InternalReadMessage internalReadMessage = new InternalReadMessage(true);
                boolean resultResult = tailer.readBytes(internalReadMessage);
                if (resultResult) {
                    if (internalReadMessage.getWriteTime() >= timestamp) {
                        return Optional.of(tailer.lastReadIndex());
                    }
                } else {
                    return Optional.empty();
                }
            }
        } finally {
            logDebug("[findPosition] end");
        }
    }

    public long getAckedReadPosition() {
        return ackedReadPosition;
    }

    @Override
    public boolean isClosed() {
        return isClosed;
    }

    private void stopReadToCache() {
        this.isReadToCacheRunning = false;
    }

    private void startReadToCache() {
        this.isReadToCacheRunning = true;
        readCacheExecutor.execute(this::readToCache);
    }

    private void readToCache() {
        try {
            logDebug("[readToCache] start");
            internalLock.lock();
            long pullInterval = config.getPullInterval();
            long fillCacheInterval = config.getFillCacheInterval();
            while (this.isReadToCacheRunning && !isClosing) {
                try {
                    InternalReadMessage internalReadMessage = new InternalReadMessage();
                    boolean readResult = mainTailer.readBytes(internalReadMessage);
                    if (!readResult) {
                        TimeUnit.MILLISECONDS.sleep(pullInterval);
                        continue;
                    }
                    long lastedReadIndex = mainTailer.lastReadIndex();
                    QueueMessage queueMessage = toQueueMessage(internalReadMessage, lastedReadIndex);
                    boolean offerResult = this.messageCache.offer(queueMessage, fillCacheInterval, TimeUnit.MILLISECONDS);
                    if (!offerResult) {
                        // if offer failed, move to last read position
                        mainTailer.moveToIndex(lastedReadIndex);
                    }
                } catch (InterruptedException e) {
                    Thread.currentThread().interrupt();
                }
            }
        } finally {
            internalLock.unlock();
            logDebug("[readToCache] end");
        }
    }

    private ExcerptTailer initMainTailer() {
        return CompletableFuture.supplyAsync(this::initMainTailerInternal, this.readCacheExecutor).join();
    }

    private ExcerptTailer initMainTailerInternal() {
        try {
            logDebug("[initExcerptTailerInternal] start");
            ExcerptTailer tailer = queue.createTailer();
            Optional<Long> lastPositionOptional = getLastPosition();
            if (lastPositionOptional.isPresent()) {
                Long position = lastPositionOptional.get();
                long beginPosition = position + 1;
                tailer.moveToIndex(beginPosition);
                logDebug("[initExcerptTailerInternal] find last position and move to position: {}", beginPosition);
            } else {
                ConsumeFromWhere consumeFromWhere = this.config.getConsumeFromWhere();
                if (consumeFromWhere == ConsumeFromWhere.LAST) {
                    tailer.toEnd();
                    logDebug("[initExcerptTailerInternal] move to end");
                } else if (consumeFromWhere == ConsumeFromWhere.FIRST) {
                    tailer.toStart();
                    logDebug("[initExcerptTailerInternal] move to start");
                }
            }
            return tailer;
        } finally {
            logDebug("[initExcerptTailer] end");
        }

    }

    /// region position

    private void flushPosition() {
        if (ackedReadPosition != -1) {
            setLastPosition(this.ackedReadPosition);
        }
    }

    private Optional<Long> getLastPosition() {
        Long position = positionStore.get(config.getConsumerId());
        if (position == null) {
            return Optional.empty();
        }
        return Optional.of(position);
    }

    private void setLastPosition(long position) {
        positionStore.put(config.getConsumerId(), position);
    }

    /// endregion

    @Override
    public void close() {
        try {
            logDebug("[close] start");
            if (isClosing) {
                logDebug("[close] is closing");
                return;
            }
            isClosing = true;
            this.internalLock.lock();
            stopReadToCache();
            this.internalLock.unlock();
            if (!positionStore.isClosed()) {
                positionStore.close();
            }
            scheduler.shutdown();
            readCacheExecutor.shutdown();
            try {
                if (!scheduler.awaitTermination(1, TimeUnit.SECONDS)) {
                    scheduler.shutdownNow();
                }
                if (!readCacheExecutor.awaitTermination(1, TimeUnit.SECONDS)) {
                    readCacheExecutor.shutdownNow();
                }
            } catch (InterruptedException e) {
                scheduler.shutdownNow();
                readCacheExecutor.shutdownNow();
                Thread.currentThread().interrupt();
            }
            if (!queue.isClosed()) {
                queue.close();
            }

            for (CloseListener closeListener : closeListenerList) {
                closeListener.onClose();
            }
            isClosed = true;
        } finally {
            logDebug("[close] end");
        }
    }

    private void moveToNearByTimestamp(ExcerptTailer tailer, long timestamp) {
        int expectedCycle = ChronicleQueueHelper.cycle(defaultRollCycle, timeProvider, timestamp);
        int currentCycle = tailer.cycle();
        if (currentCycle != expectedCycle) {
            boolean moveToCycleResult = tailer.moveToCycle(expectedCycle);
            logDebug("[moveToNearByTimestamp] moveToCycleResult: {}", moveToCycleResult);
        }
    }

    @Override
    public void addCloseListener(CloseListener listener) {
        closeListenerList.add(listener);
    }

    // region logger

    private void logDebug(String format) {
        if (logger.isDebugEnabled()) {
            logger.debug(format);
        }
    }

    private void logDebug(String format, Object arg) {
        if (logger.isDebugEnabled()) {
            logger.debug(format, arg);
        }
    }

    // endregion
}

1	package com.github.wz2cool.localqueue.impl;
2
3	import com.github.wz2cool.localqueue.IConsumer;
4	import com.github.wz2cool.localqueue.event.CloseListener;
5	import com.github.wz2cool.localqueue.helper.ChronicleQueueHelper;
6	import com.github.wz2cool.localqueue.model.config.SimpleConsumerConfig;
7	import com.github.wz2cool.localqueue.model.enums.ConsumeFromWhere;
8	import com.github.wz2cool.localqueue.model.message.InternalReadMessage;
9	import com.github.wz2cool.localqueue.model.message.QueueMessage;
10	import net.openhft.chronicle.core.time.TimeProvider;
11	import net.openhft.chronicle.queue.ChronicleQueue;
12	import net.openhft.chronicle.queue.ExcerptTailer;
13	import net.openhft.chronicle.queue.RollCycle;
14	import net.openhft.chronicle.queue.impl.single.SingleChronicleQueue;
15	import org.slf4j.Logger;
16	import org.slf4j.LoggerFactory;
17
18	import java.util.ArrayList;
19	import java.util.List;
20	import java.util.Objects;
21	import java.util.Optional;
22	import java.util.concurrent.*;
23	import java.util.concurrent.atomic.AtomicInteger;
24	import java.util.concurrent.locks.Lock;
25	import java.util.concurrent.locks.ReentrantLock;
26
27	/**
28	* simple consumer
29	*
30	* @author frank
31	*/
32	public class SimpleConsumer implements IConsumer {
33
34	private final Logger logger = LoggerFactory.getLogger(this.getClass());	1✔
35	private final RollCycle defaultRollCycle;
36	private final TimeProvider timeProvider;
37	private final SimpleConsumerConfig config;
38	private final PositionStore positionStore;
39	private final SingleChronicleQueue queue;
40	// should only call by readCacheExecutor
41	private final ExcerptTailer mainTailer;
42	private final ExecutorService readCacheExecutor = Executors.newSingleThreadExecutor();	1✔
43	private final ScheduledExecutorService scheduler = Executors.newScheduledThreadPool(1);	1✔
44	private final LinkedBlockingQueue<QueueMessage> messageCache;
45	private final ConcurrentLinkedQueue<CloseListener> closeListenerList = new ConcurrentLinkedQueue<>();	1✔
46	private volatile long ackedReadPosition = -1;	1✔
47	private volatile boolean isReadToCacheRunning = true;	1✔
48	private volatile boolean isClosing = false;	1✔
49	private volatile boolean isClosed = false;	1✔
50	private final AtomicInteger positionVersion = new AtomicInteger(0);	1✔
51	private final Lock internalLock = new ReentrantLock();	1✔
52
53	/**
54	* constructor
55	*
56	* @param config the config of consumer
57	*/
58	public SimpleConsumer(final SimpleConsumerConfig config) {	1✔
59	this.config = config;	1✔
60	this.timeProvider = ChronicleQueueHelper.getTimeProvider(config.getTimeZone());	1✔
61	this.messageCache = new LinkedBlockingQueue<>(config.getCacheSize());	1✔
62	this.positionStore = new PositionStore(config.getPositionFile());	1✔
63	this.defaultRollCycle = ChronicleQueueHelper.getRollCycle(config.getRollCycleType());	1✔
64	this.queue = ChronicleQueue.singleBuilder(config.getDataDir())	1✔
65	.timeProvider(timeProvider)	1✔
66	.rollCycle(defaultRollCycle)	1✔
67	.build();	1✔
68	this.mainTailer = initMainTailer();	1✔
69	startReadToCache();	1✔
70	scheduler.scheduleAtFixedRate(this::flushPosition, 0, config.getFlushPositionInterval(), TimeUnit.MILLISECONDS);	1✔
71	}	1✔
72
73	@Override
74	public synchronized QueueMessage take() throws InterruptedException {
75	return this.messageCache.take();	1✔
76	}
77
78	@Override
79	public synchronized List<QueueMessage> batchTake(int maxBatchSize) throws InterruptedException {
80	List<QueueMessage> result = new ArrayList<>(maxBatchSize);	1✔
81	QueueMessage take = this.messageCache.take();	1✔
82	result.add(take);	1✔
83	this.messageCache.drainTo(result, maxBatchSize - 1);	1✔
84	return result;	1✔
85	}
86
87	@Override
88	public synchronized Optional<QueueMessage> take(long timeout, TimeUnit unit) throws InterruptedException {
89	QueueMessage message = this.messageCache.poll(timeout, unit);	1✔
90	return Optional.ofNullable(message);	1✔
91	}
92
93	@Override
94	public synchronized List<QueueMessage> batchTake(int maxBatchSize, long timeout, TimeUnit unit) throws InterruptedException {
95	List<QueueMessage> result = new ArrayList<>(maxBatchSize);	1✔
96	QueueMessage poll = this.messageCache.poll(timeout, unit);	1✔
97	if (Objects.nonNull(poll)) {	1✔
98	result.add(poll);	1✔
99	this.messageCache.drainTo(result, maxBatchSize - 1);	1✔
100	}
101	return result;	1✔
102	}
103
104	@Override
105	public synchronized Optional<QueueMessage> poll() {
106	QueueMessage message = this.messageCache.poll();	1✔
107	return Optional.ofNullable(message);	1✔
108	}
109
110	@Override
111	public synchronized List<QueueMessage> batchPoll(int maxBatchSize) {
112	List<QueueMessage> result = new ArrayList<>(maxBatchSize);	1✔
113	this.messageCache.drainTo(result, maxBatchSize);	1✔
114	return result;	1✔
115	}
116
117	@Override
118	public synchronized void ack(final QueueMessage message) {
119	if (Objects.isNull(message)) {	1✔
120	return;	1✔
121	}
122
123	if (message.getPositionVersion() != positionVersion.get()) {	1✔
124	return;	×
125	}
126
127	this.ackedReadPosition = message.getPosition();	1✔
128	}	1✔
129
130	@Override
131	public synchronized void ack(final List<QueueMessage> messages) {
132	if (Objects.isNull(messages) \|\| messages.isEmpty()) {	1✔
133	return;	1✔
134	}
135	QueueMessage lastOne = messages.get(messages.size() - 1);	1✔
136	if (lastOne.getPositionVersion() != positionVersion.get()) {	1✔
137	return;	×
138	}
139	this.ackedReadPosition = lastOne.getPosition();	1✔
140	}	1✔
141
142	@Override
143	public boolean moveToPosition(final long position) {
144	logDebug("[moveToPosition] start");	1✔
145	stopReadToCache();	1✔
146	try {
147	internalLock.lock();	1✔
148	return moveToPositionInternal(position);	1✔
149	} finally {
150	internalLock.unlock();	1✔
151	startReadToCache();	1✔
152	logDebug("[moveToPosition] end");	1✔
153	}	×
154	}
155
156	@Override
157	public boolean moveToTimestamp(final long timestamp) {
158	logDebug("[moveToTimestamp] start, timestamp: {}", timestamp);	1✔
159	stopReadToCache();	1✔
160	try {
161	internalLock.lock();	1✔
162	Optional<Long> positionOptional = findPosition(timestamp);	1✔
163	if (!positionOptional.isPresent()) {	1✔
164	return false;	1✔
165	}
166	Long position = positionOptional.get();	1✔
167	return moveToPositionInternal(position);	1✔
168	} finally {
169	internalLock.unlock();	1✔
170	startReadToCache();	1✔
171	logDebug("[moveToTimestamp] end");	1✔
172	}	×
173	}
174
175	@Override
176	public Optional<QueueMessage> get(final String messageKey) {
177	return get(messageKey, 0L, Long.MAX_VALUE);	1✔
178	}
179
180	@Override
181	public Optional<QueueMessage> get(final String messageKey, long searchTimestampStart, long searchTimestampEnd) {
182	if (messageKey == null \|\| messageKey.isEmpty()) {	1✔
183	return Optional.empty();	1✔
184	}
185	try (ExcerptTailer tailer = queue.createTailer()) {	1✔
186	moveToNearByTimestamp(tailer, searchTimestampStart);	1✔
187	while (true) {
188	// for performance, ignore read content.
189	InternalReadMessage internalReadMessage = new InternalReadMessage(true);	1✔
190	boolean readResult = tailer.readBytes(internalReadMessage);	1✔
191	if (!readResult) {	1✔
192	return Optional.empty();	1✔
193	}
194	if (internalReadMessage.getWriteTime() < searchTimestampStart) {	1✔
195	continue;	1✔
196	}
197	if (internalReadMessage.getWriteTime() > searchTimestampEnd) {	1✔
198	return Optional.empty();	×
199	}
200	boolean moveToResult = tailer.moveToIndex(tailer.lastReadIndex());	1✔
201	if (!moveToResult) {	1✔
202	return Optional.empty();	×
203	}
204	internalReadMessage = new InternalReadMessage();	1✔
205	readResult = tailer.readBytes(internalReadMessage);	1✔
206	if (!readResult) {	1✔
207	return Optional.empty();	×
208	}
209	QueueMessage queueMessage = toQueueMessage(internalReadMessage, tailer.lastReadIndex());	1✔
210	if (Objects.equals(messageKey, queueMessage.getMessageKey())) {	1✔
211	return Optional.of(queueMessage);	1✔
212	}
213	}	1✔
214	}	1✔
215	}
216
217	private QueueMessage toQueueMessage(final InternalReadMessage internalReadMessage, final long position) {
218	return new QueueMessage(	1✔
219	internalReadMessage.getMessageKey(),	1✔
220	positionVersion.get(),	1✔
221	position,
222	internalReadMessage.getContent(),	1✔
223	internalReadMessage.getWriteTime());	1✔
224	}
225
226	private boolean moveToPositionInternal(final long position) {
227	return CompletableFuture.supplyAsync(() -> {	1✔
228	try {
229	logDebug("[moveToPositionInternal] start, position: {}", position);	1✔
230	boolean moveToResult = mainTailer.moveToIndex(position);	1✔
231	if (moveToResult) {	1✔
232	positionVersion.incrementAndGet();	1✔
233	messageCache.clear();	1✔
234	this.ackedReadPosition = position;	1✔
235	}
236	return moveToResult;	1✔
237	} finally {
238	logDebug("[moveToPositionInternal] end");	1✔
239	}	×
240	}, this.readCacheExecutor).join();	1✔
241	}
242
243	private Optional<Long> findPosition(final long timestamp) {
244	logDebug("[findPosition] start, timestamp: {}", timestamp);	1✔
245	try (ExcerptTailer tailer = queue.createTailer()) {	1✔
246	moveToNearByTimestamp(tailer, timestamp);	1✔
247	while (true) {
248	InternalReadMessage internalReadMessage = new InternalReadMessage(true);	1✔
249	boolean resultResult = tailer.readBytes(internalReadMessage);	1✔
250	if (resultResult) {	1✔
251	if (internalReadMessage.getWriteTime() >= timestamp) {	1✔
252	return Optional.of(tailer.lastReadIndex());	1✔
253	}
254	} else {
255	return Optional.empty();	1✔
256	}
257	}	1✔
258	} finally {	1✔
259	logDebug("[findPosition] end");	1✔
260	}	×
261	}
262
263	public long getAckedReadPosition() {
264	return ackedReadPosition;	1✔
265	}
266
267	@Override
268	public boolean isClosed() {
269	return isClosed;	1✔
270	}
271
272	private void stopReadToCache() {
273	this.isReadToCacheRunning = false;	1✔
274	}	1✔
275
276	private void startReadToCache() {
277	this.isReadToCacheRunning = true;	1✔
278	readCacheExecutor.execute(this::readToCache);	1✔
279	}	1✔
280
281	private void readToCache() {
282	try {
283	logDebug("[readToCache] start");	1✔
284	internalLock.lock();	1✔
285	long pullInterval = config.getPullInterval();	1✔
286	long fillCacheInterval = config.getFillCacheInterval();	1✔
287	while (this.isReadToCacheRunning && !isClosing) {	1✔
288	try {
289	InternalReadMessage internalReadMessage = new InternalReadMessage();	1✔
290	boolean readResult = mainTailer.readBytes(internalReadMessage);	1✔
291	if (!readResult) {	1✔
292	TimeUnit.MILLISECONDS.sleep(pullInterval);	1✔
293	continue;	1✔
294	}
295	long lastedReadIndex = mainTailer.lastReadIndex();	1✔
296	QueueMessage queueMessage = toQueueMessage(internalReadMessage, lastedReadIndex);	1✔
297	boolean offerResult = this.messageCache.offer(queueMessage, fillCacheInterval, TimeUnit.MILLISECONDS);	1✔
298	if (!offerResult) {	1✔
299	// if offer failed, move to last read position
300	mainTailer.moveToIndex(lastedReadIndex);	1✔
301	}
302	} catch (InterruptedException e) {	×
303	Thread.currentThread().interrupt();	×
304	}	1✔
305	}
306	} finally {
307	internalLock.unlock();	1✔
308	logDebug("[readToCache] end");	1✔
309	}	1✔
310	}	1✔
311
312	private ExcerptTailer initMainTailer() {
313	return CompletableFuture.supplyAsync(this::initMainTailerInternal, this.readCacheExecutor).join();	1✔
314	}
315
316	private ExcerptTailer initMainTailerInternal() {
317	try {
318	logDebug("[initExcerptTailerInternal] start");	1✔
319	ExcerptTailer tailer = queue.createTailer();	1✔
320	Optional<Long> lastPositionOptional = getLastPosition();	1✔
321	if (lastPositionOptional.isPresent()) {	1✔
322	Long position = lastPositionOptional.get();	1✔
323	long beginPosition = position + 1;	1✔
324	tailer.moveToIndex(beginPosition);	1✔
325	logDebug("[initExcerptTailerInternal] find last position and move to position: {}", beginPosition);	1✔
326	} else {	1✔
327	ConsumeFromWhere consumeFromWhere = this.config.getConsumeFromWhere();	1✔
328	if (consumeFromWhere == ConsumeFromWhere.LAST) {	1✔
329	tailer.toEnd();	1✔
330	logDebug("[initExcerptTailerInternal] move to end");	1✔
331	} else if (consumeFromWhere == ConsumeFromWhere.FIRST) {	1✔
332	tailer.toStart();	1✔
333	logDebug("[initExcerptTailerInternal] move to start");	1✔
334	}
335	}
336	return tailer;	1✔
337	} finally {
338	logDebug("[initExcerptTailer] end");	1✔
339	}	×
340
341	}
342
343	/// region position
344
345	private void flushPosition() {
346	if (ackedReadPosition != -1) {	1✔
347	setLastPosition(this.ackedReadPosition);	1✔
348	}
349	}	1✔
350
351	private Optional<Long> getLastPosition() {
352	Long position = positionStore.get(config.getConsumerId());	1✔
353	if (position == null) {	1✔
354	return Optional.empty();	1✔
355	}
356	return Optional.of(position);	1✔
357	}
358
359	private void setLastPosition(long position) {
360	positionStore.put(config.getConsumerId(), position);	1✔
361	}	1✔
362
363	/// endregion
364
365	@Override
366	public void close() {
367	try {
368	logDebug("[close] start");	1✔
369	if (isClosing) {	1✔
NEW 370	logDebug("[close] is closing");	×
UNCOV 371	return;	×
372	}
373	isClosing = true;	1✔
374	this.internalLock.lock();	1✔
375	stopReadToCache();	1✔
376	this.internalLock.unlock();	1✔
377	if (!positionStore.isClosed()) {	1✔
378	positionStore.close();	1✔
379	}
380	scheduler.shutdown();	1✔
381	readCacheExecutor.shutdown();	1✔
382	try {
383	if (!scheduler.awaitTermination(1, TimeUnit.SECONDS)) {	1✔
384	scheduler.shutdownNow();	×
385	}
386	if (!readCacheExecutor.awaitTermination(1, TimeUnit.SECONDS)) {	1✔
387	readCacheExecutor.shutdownNow();	×
388	}
389	} catch (InterruptedException e) {	×
390	scheduler.shutdownNow();	×
391	readCacheExecutor.shutdownNow();	×
392	Thread.currentThread().interrupt();	×
393	}	1✔
394	if (!queue.isClosed()) {	1✔
395	queue.close();	1✔
396	}
397
398	for (CloseListener closeListener : closeListenerList) {	1✔
399	closeListener.onClose();	1✔
400	}	1✔
401	isClosed = true;	1✔
402	} finally {
403	logDebug("[close] end");	1✔
404	}	1✔
405	}	1✔
406
407	private void moveToNearByTimestamp(ExcerptTailer tailer, long timestamp) {
408	int expectedCycle = ChronicleQueueHelper.cycle(defaultRollCycle, timeProvider, timestamp);	1✔
409	int currentCycle = tailer.cycle();	1✔
410	if (currentCycle != expectedCycle) {	1✔
411	boolean moveToCycleResult = tailer.moveToCycle(expectedCycle);	1✔
412	logDebug("[moveToNearByTimestamp] moveToCycleResult: {}", moveToCycleResult);	1✔
413	}
414	}	1✔
415
416	@Override
417	public void addCloseListener(CloseListener listener) {
418	closeListenerList.add(listener);	1✔
419	}	1✔
420
421	// region logger
422
423	private void logDebug(String format) {
424	if (logger.isDebugEnabled()) {	1✔
425	logger.debug(format);	×
426	}
427	}	1✔
428
429	private void logDebug(String format, Object arg) {
430	if (logger.isDebugEnabled()) {	1✔
431	logger.debug(format, arg);	×
432	}
433	}	1✔
434
435	// endregion
436	}

wz2cool / local-queue / #40

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