wz2cool / local-queue / #10

Committed 29 Jan 2025 05:10AM UTC coverage: 91.94% (+2.1%) from 89.817%

Build # #10

Build Type

push

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Commit Message

move to timestamp

Run Details

9 of 15 new or added lines in 4 files covered. (60.0%)

1 existing line in 1 file now uncovered.

365 of 397 relevant lines covered (91.94%)

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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.model.config.SimpleConsumerConfig;
import com.github.wz2cool.localqueue.model.message.InternalReadMessage;
import com.github.wz2cool.localqueue.model.message.QueueMessage;
import net.openhft.chronicle.queue.ChronicleQueue;
import net.openhft.chronicle.queue.ExcerptTailer;
import net.openhft.chronicle.queue.RollCycles;
import net.openhft.chronicle.queue.impl.single.SingleChronicleQueue;

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, AutoCloseable {

    private final SimpleConsumerConfig config;
    private final PositionStore positionStore;

    private final SingleChronicleQueue queue;
    private final ThreadLocal<ExcerptTailer> tailerThreadLocal;
    private final ExecutorService readCacheExecutor = Executors.newSingleThreadExecutor();
    private final ScheduledExecutorService scheduler = Executors.newScheduledThreadPool(1);
    private final LinkedBlockingQueue<QueueMessage> messageCache;
    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.messageCache = new LinkedBlockingQueue<>(config.getCacheSize());
        this.positionStore = new PositionStore(config.getPositionFile());
        this.queue = ChronicleQueue.singleBuilder(config.getDataDir()).rollCycle(RollCycles.FAST_DAILY).build();
        this.tailerThreadLocal = ThreadLocal.withInitial(this::initExcerptTailer);
        scheduler.scheduleAtFixedRate(this::flushPosition, 0, config.getFlushPositionInterval(), TimeUnit.MILLISECONDS);
        startReadToCache();
    }

    @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) {
        stopReadToCache();
        try {
            if (isClosing) {
                return false;
            }
            internalLock.lock();
            if (isClosing) {
                return false;
            }
            return CompletableFuture.supplyAsync(() -> {
                ExcerptTailer tailer = tailerThreadLocal.get();
                boolean moveToResult = tailer.moveToIndex(position);
                if (moveToResult) {
                    positionVersion.incrementAndGet();
                    messageCache.clear();
                    this.ackedReadPosition = position;
                }
                return moveToResult;
            }, this.readCacheExecutor).join();
        } finally {
            internalLock.unlock();
            startReadToCache();
        }
    }

    @Override
    public boolean moveToTimestamp(long timestamp) {
        Optional<Long> positionOptional = findPosition(timestamp);
        if (!positionOptional.isPresent()) {
            return false;
        }
        Long position = positionOptional.get();
        return moveToPosition(position);
    }

    private Optional<Long> findPosition(final long timestamp) {
        try (ExcerptTailer excerptTailer = initExcerptTailer()) {
            while (true) {
                InternalReadMessage internalReadMessage = new InternalReadMessage();
                boolean resultResult = excerptTailer.readBytes(internalReadMessage);
                if (resultResult) {
                    if (internalReadMessage.getWriteTime() >= timestamp) {
                        return Optional.of(excerptTailer.lastReadIndex());
                    }
                } else {
                    return Optional.empty();
                }
            }
        }
    }

    public long getAckedReadPosition() {
        return ackedReadPosition;
    }

    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 {
            internalLock.lock();
            long pullInterval = config.getPullInterval();
            while (this.isReadToCacheRunning && !isClosing) {
                try {
                    // when cache is full, sleep
                    if (this.messageCache.remainingCapacity() == 0) {
                        TimeUnit.MILLISECONDS.sleep(pullInterval);
                        continue;
                    }
                    ExcerptTailer tailer = tailerThreadLocal.get();
                    InternalReadMessage internalReadMessage = new InternalReadMessage();
                    boolean readResult = tailer.readBytes(internalReadMessage);
                    if (!readResult) {
                        TimeUnit.MILLISECONDS.sleep(pullInterval);
                        continue;
                    }
                    long lastedReadIndex = tailer.lastReadIndex();
                    QueueMessage queueMessage = new QueueMessage(
                            positionVersion.get(),
                            lastedReadIndex,
                            internalReadMessage.getContent(),
                            internalReadMessage.getWriteTime());
                    boolean offerResult = this.messageCache.offer(queueMessage, pullInterval, TimeUnit.MILLISECONDS);
                    if (!offerResult) {
                        // if offer failed, move to last read position
                        tailer.moveToIndex(lastedReadIndex);
                    }
                } catch (InterruptedException e) {
                    Thread.currentThread().interrupt();
                }
            }
        } finally {
            internalLock.unlock();
        }
    }


    private ExcerptTailer initExcerptTailer() {
        ExcerptTailer tailer = queue.createTailer();
        Optional<Long> lastPositionOptional = getLastPosition();
        if (lastPositionOptional.isPresent()) {
            Long position = lastPositionOptional.get();
            long beginPosition = position + 1;
            tailer.moveToIndex(beginPosition);
        }
        return tailer;
    }

    /// 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 synchronized void close() {
        isClosing = true;
        this.internalLock.lock();
        stopReadToCache();
        this.internalLock.unlock();

        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();
        }
        tailerThreadLocal.remove();
        queue.close();
        isClosed = true;

    }
}

1	package com.github.wz2cool.localqueue.impl;
2
3	import com.github.wz2cool.localqueue.IConsumer;
4	import com.github.wz2cool.localqueue.model.config.SimpleConsumerConfig;
5	import com.github.wz2cool.localqueue.model.message.InternalReadMessage;
6	import com.github.wz2cool.localqueue.model.message.QueueMessage;
7	import net.openhft.chronicle.queue.ChronicleQueue;
8	import net.openhft.chronicle.queue.ExcerptTailer;
9	import net.openhft.chronicle.queue.RollCycles;
10	import net.openhft.chronicle.queue.impl.single.SingleChronicleQueue;
11
12	import java.util.ArrayList;
13	import java.util.List;
14	import java.util.Objects;
15	import java.util.Optional;
16	import java.util.concurrent.*;
17	import java.util.concurrent.atomic.AtomicInteger;
18	import java.util.concurrent.locks.Lock;
19	import java.util.concurrent.locks.ReentrantLock;
20
21	/**
22	* simple consumer
23	*
24	* @author frank
25	*/
26	public class SimpleConsumer implements IConsumer, AutoCloseable {
27
28	private final SimpleConsumerConfig config;
29	private final PositionStore positionStore;
30
31	private final SingleChronicleQueue queue;
32	private final ThreadLocal<ExcerptTailer> tailerThreadLocal;
33	private final ExecutorService readCacheExecutor = Executors.newSingleThreadExecutor();	1✔
34	private final ScheduledExecutorService scheduler = Executors.newScheduledThreadPool(1);	1✔
35	private final LinkedBlockingQueue<QueueMessage> messageCache;
36	private volatile long ackedReadPosition = -1;	1✔
37	private volatile boolean isReadToCacheRunning = true;	1✔
38	private volatile boolean isClosing = false;	1✔
39	private volatile boolean isClosed = false;	1✔
40	private final AtomicInteger positionVersion = new AtomicInteger(0);	1✔
41
42	private final Lock internalLock = new ReentrantLock();	1✔
43
44
45	/**
46	* constructor
47	*
48	* @param config the config of consumer
49	*/
50	public SimpleConsumer(final SimpleConsumerConfig config) {	1✔
51	this.config = config;	1✔
52	this.messageCache = new LinkedBlockingQueue<>(config.getCacheSize());	1✔
53	this.positionStore = new PositionStore(config.getPositionFile());	1✔
54	this.queue = ChronicleQueue.singleBuilder(config.getDataDir()).rollCycle(RollCycles.FAST_DAILY).build();	1✔
55	this.tailerThreadLocal = ThreadLocal.withInitial(this::initExcerptTailer);	1✔
56	scheduler.scheduleAtFixedRate(this::flushPosition, 0, config.getFlushPositionInterval(), TimeUnit.MILLISECONDS);	1✔
57	startReadToCache();	1✔
58	}	1✔
59
60	@Override
61	public synchronized QueueMessage take() throws InterruptedException {
62	return this.messageCache.take();	1✔
63	}
64
65	@Override
66	public synchronized List<QueueMessage> batchTake(int maxBatchSize) throws InterruptedException {
67	List<QueueMessage> result = new ArrayList<>(maxBatchSize);	1✔
68	QueueMessage take = this.messageCache.take();	1✔
69	result.add(take);	1✔
70	this.messageCache.drainTo(result, maxBatchSize - 1);	1✔
71	return result;	1✔
72	}
73
74	@Override
75	public synchronized Optional<QueueMessage> take(long timeout, TimeUnit unit) throws InterruptedException {
76	QueueMessage message = this.messageCache.poll(timeout, unit);	1✔
77	return Optional.ofNullable(message);	1✔
78	}
79
80	@Override
81	public synchronized List<QueueMessage> batchTake(int maxBatchSize, long timeout, TimeUnit unit) throws InterruptedException {
82	List<QueueMessage> result = new ArrayList<>(maxBatchSize);	1✔
83	QueueMessage poll = this.messageCache.poll(timeout, unit);	1✔
84	if (Objects.nonNull(poll)) {	1✔
85	result.add(poll);	1✔
86	this.messageCache.drainTo(result, maxBatchSize - 1);	1✔
87	}
88	return result;	1✔
89	}
90
91	@Override
92	public synchronized Optional<QueueMessage> poll() {
93	QueueMessage message = this.messageCache.poll();	1✔
94	return Optional.ofNullable(message);	1✔
95	}
96
97	@Override
98	public synchronized List<QueueMessage> batchPoll(int maxBatchSize) {
99	List<QueueMessage> result = new ArrayList<>(maxBatchSize);	1✔
100	this.messageCache.drainTo(result, maxBatchSize);	1✔
101	return result;	1✔
102	}
103
104	@Override
105	public synchronized void ack(final QueueMessage message) {
106	if (Objects.isNull(message)) {	1✔
107	return;	1✔
108	}
109
110	if (message.getPositionVersion() != positionVersion.get()) {	1✔
111	return;	×
112	}
113
114	this.ackedReadPosition = message.getPosition();	1✔
115	}	1✔
116
117	@Override
118	public synchronized void ack(final List<QueueMessage> messages) {
119	if (Objects.isNull(messages) \|\| messages.isEmpty()) {	1✔
120	return;	1✔
121	}
122	QueueMessage lastOne = messages.get(messages.size() - 1);	1✔
123	if (lastOne.getPositionVersion() != positionVersion.get()) {	1✔
124	return;	×
125	}
126	this.ackedReadPosition = lastOne.getPosition();	1✔
127	}	1✔
128
129	@Override
130	public boolean moveToPosition(final long position) {
131	stopReadToCache();	1✔
132	try {
133	if (isClosing) {	1✔
NEW 134	return false;	×
135	}
136	internalLock.lock();	1✔
137	if (isClosing) {	1✔
NEW 138	return false;	×
139	}
140	return CompletableFuture.supplyAsync(() -> {	1✔
141	ExcerptTailer tailer = tailerThreadLocal.get();	1✔
142	boolean moveToResult = tailer.moveToIndex(position);	1✔
143	if (moveToResult) {	1✔
144	positionVersion.incrementAndGet();	1✔
145	messageCache.clear();	1✔
146	this.ackedReadPosition = position;	1✔
147	}
148	return moveToResult;	1✔
149	}, this.readCacheExecutor).join();	1✔
150	} finally {
151	internalLock.unlock();	1✔
152	startReadToCache();	1✔
153	}	×
154	}
155
156	@Override
157	public boolean moveToTimestamp(long timestamp) {
158	Optional<Long> positionOptional = findPosition(timestamp);	1✔
159	if (!positionOptional.isPresent()) {	1✔
160	return false;	1✔
161	}
162	Long position = positionOptional.get();	1✔
163	return moveToPosition(position);	1✔
164	}
165
166	private Optional<Long> findPosition(final long timestamp) {
167	try (ExcerptTailer excerptTailer = initExcerptTailer()) {	1✔
168	while (true) {
169	InternalReadMessage internalReadMessage = new InternalReadMessage();	1✔
170	boolean resultResult = excerptTailer.readBytes(internalReadMessage);	1✔
171	if (resultResult) {	1✔
172	if (internalReadMessage.getWriteTime() >= timestamp) {	1✔
173	return Optional.of(excerptTailer.lastReadIndex());	1✔
174	}
175	} else {
176	return Optional.empty();	1✔
177	}
178	}	1✔
179	}	1✔
180	}
181
182	public long getAckedReadPosition() {
183	return ackedReadPosition;	1✔
184	}
185
186	public boolean isClosed() {
187	return isClosed;	1✔
188	}
189
190	private void stopReadToCache() {
191	this.isReadToCacheRunning = false;	1✔
192	}	1✔
193
194	private void startReadToCache() {
195	this.isReadToCacheRunning = true;	1✔
196	readCacheExecutor.execute(this::readToCache);	1✔
197	}	1✔
198
199	private void readToCache() {
200	try {
201	internalLock.lock();	1✔
202	long pullInterval = config.getPullInterval();	1✔
203	while (this.isReadToCacheRunning && !isClosing) {	1✔
204	try {
205	// when cache is full, sleep
206	if (this.messageCache.remainingCapacity() == 0) {	1✔
207	TimeUnit.MILLISECONDS.sleep(pullInterval);	1✔
208	continue;	1✔
209	}
210	ExcerptTailer tailer = tailerThreadLocal.get();	1✔
211	InternalReadMessage internalReadMessage = new InternalReadMessage();	1✔
212	boolean readResult = tailer.readBytes(internalReadMessage);	1✔
213	if (!readResult) {	1✔
214	TimeUnit.MILLISECONDS.sleep(pullInterval);	1✔
215	continue;	1✔
216	}
217	long lastedReadIndex = tailer.lastReadIndex();	1✔
218	QueueMessage queueMessage = new QueueMessage(	1✔
219	positionVersion.get(),	1✔
220	lastedReadIndex,
221	internalReadMessage.getContent(),	1✔
222	internalReadMessage.getWriteTime());	1✔
223	boolean offerResult = this.messageCache.offer(queueMessage, pullInterval, TimeUnit.MILLISECONDS);	1✔
224	if (!offerResult) {	1✔
225	// if offer failed, move to last read position
NEW 226	tailer.moveToIndex(lastedReadIndex);	×
227	}
228	} catch (InterruptedException e) {	×
229	Thread.currentThread().interrupt();	×
230	}	1✔
231	}
232	} finally {
233	internalLock.unlock();	1✔
234	}	1✔
235	}	1✔
236
237
238	private ExcerptTailer initExcerptTailer() {
239	ExcerptTailer tailer = queue.createTailer();	1✔
240	Optional<Long> lastPositionOptional = getLastPosition();	1✔
241	if (lastPositionOptional.isPresent()) {	1✔
242	Long position = lastPositionOptional.get();	1✔
243	long beginPosition = position + 1;	1✔
244	tailer.moveToIndex(beginPosition);	1✔
245	}
246	return tailer;	1✔
247	}
248
249	/// region position
250
251	private void flushPosition() {
252	if (ackedReadPosition != -1) {	1✔
253	setLastPosition(this.ackedReadPosition);	1✔
254	}
255	}	1✔
256
257	private Optional<Long> getLastPosition() {
258	Long position = positionStore.get(config.getConsumerId());	1✔
259	if (position == null) {	1✔
260	return Optional.empty();	1✔
261	}
262	return Optional.of(position);	1✔
263	}
264
265	private void setLastPosition(long position) {
266	positionStore.put(config.getConsumerId(), position);	1✔
267	}	1✔
268
269	/// endregion
270
271	@Override
272	public synchronized void close() {
273	isClosing = true;	1✔
274	this.internalLock.lock();	1✔
275	stopReadToCache();	1✔
276	this.internalLock.unlock();	1✔
277
278	positionStore.close();	1✔
279	scheduler.shutdown();	1✔
280	readCacheExecutor.shutdown();	1✔
281	try {
282	if (!scheduler.awaitTermination(1, TimeUnit.SECONDS)) {	1✔
283	scheduler.shutdownNow();	×
284	}
285	if (!readCacheExecutor.awaitTermination(1, TimeUnit.SECONDS)) {	1✔
286	readCacheExecutor.shutdownNow();	×
287	}
288	} catch (InterruptedException e) {	×
289	scheduler.shutdownNow();	×
290	readCacheExecutor.shutdownNow();	×
291	Thread.currentThread().interrupt();	×
292	}	1✔
293	tailerThreadLocal.remove();	1✔
294	queue.close();	1✔
295	isClosed = true;	1✔
296
297	}	1✔
298	}

wz2cool / local-queue / #10

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