Java Code Examples for java.util.concurrent.locks.StampedLock#unlockWrite()

The following examples show how to use java.util.concurrent.locks.StampedLock#unlockWrite() . You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.

Example 1

Source File: Basic.java From openjdk-8-source with GNU General Public License v2.0

6 votes

static Writer interruptibleWriter(final StampedLock sl,
                                  final long timeout,
                                  final TimeUnit unit,
                                  final Phaser gate) {
    return new Writer("InterruptibleWriter") { public void run() {
        if (gate != null ) toTheStartingGate(gate);
        try {
            if (timeout < 0)
                stamp(sl.writeLockInterruptibly());
            else
                stamp(sl.tryWriteLock(timeout, unit));
            check(sl.validate(stamp()));
            check(!sl.isReadLocked());
            check(sl.isWriteLocked());
        } catch (Throwable x) { thrown(x);
        } finally { if (stamp() != 0L) sl.unlockWrite(stamp()); } }};
}

Example 2

Source File: Basic.java From openjdk-8 with GNU General Public License v2.0

6 votes

static Writer interruptibleWriter(final StampedLock sl,
                                  final long timeout,
                                  final TimeUnit unit,
                                  final Phaser gate) {
    return new Writer("InterruptibleWriter") { public void run() {
        if (gate != null ) toTheStartingGate(gate);
        try {
            if (timeout < 0)
                stamp(sl.writeLockInterruptibly());
            else
                stamp(sl.tryWriteLock(timeout, unit));
            check(sl.validate(stamp()));
            check(!sl.isReadLocked());
            check(sl.isWriteLocked());
        } catch (Throwable x) { thrown(x);
        } finally { if (stamp() != 0L) sl.unlockWrite(stamp()); } }};
}

Example 3

Source File: Basic.java From jdk8u_jdk with GNU General Public License v2.0

6 votes

static Writer interruptibleWriter(final StampedLock sl,
                                  final long timeout,
                                  final TimeUnit unit,
                                  final Phaser gate) {
    return new Writer("InterruptibleWriter") { public void run() {
        if (gate != null ) toTheStartingGate(gate);
        try {
            if (timeout < 0)
                stamp(sl.writeLockInterruptibly());
            else
                stamp(sl.tryWriteLock(timeout, unit));
            check(sl.validate(stamp()));
            check(!sl.isReadLocked());
            check(sl.isWriteLocked());
        } catch (Throwable x) { thrown(x);
        } finally { if (stamp() != 0L) sl.unlockWrite(stamp()); } }};
}

Example 4

Source File: Basic.java From openjdk-jdk9 with GNU General Public License v2.0

6 votes

static Writer interruptibleWriter(final StampedLock sl,
                                  final long timeout,
                                  final TimeUnit unit,
                                  final Phaser gate) {
    return new Writer("InterruptibleWriter") { public void run() {
        if (gate != null ) toTheStartingGate(gate);
        try {
            if (timeout < 0)
                stamp(sl.writeLockInterruptibly());
            else
                stamp(sl.tryWriteLock(timeout, unit));
            check(sl.validate(stamp()));
            check(!sl.isReadLocked());
            check(sl.isWriteLocked());
        } catch (Throwable x) { thrown(x);
        } finally { if (stamp() != 0L) sl.unlockWrite(stamp()); } }};
}

Example 5

Source File: Basic.java From dragonwell8_jdk with GNU General Public License v2.0

6 votes

static Writer interruptibleWriter(final StampedLock sl,
                                  final long timeout,
                                  final TimeUnit unit,
                                  final Phaser gate) {
    return new Writer("InterruptibleWriter") { public void run() {
        if (gate != null ) toTheStartingGate(gate);
        try {
            if (timeout < 0)
                stamp(sl.writeLockInterruptibly());
            else
                stamp(sl.tryWriteLock(timeout, unit));
            check(sl.validate(stamp()));
            check(!sl.isReadLocked());
            check(sl.isWriteLocked());
        } catch (Throwable x) { thrown(x);
        } finally { if (stamp() != 0L) sl.unlockWrite(stamp()); } }};
}

Example 6

Source File: Basic.java From native-obfuscator with GNU General Public License v3.0

6 votes

static Writer interruptibleWriter(final StampedLock sl,
                                  final long timeout,
                                  final TimeUnit unit,
                                  final Phaser gate) {
    return new Writer("InterruptibleWriter") { public void run() {
        if (gate != null ) toTheStartingGate(gate);
        try {
            if (timeout < 0)
                stamp(sl.writeLockInterruptibly());
            else
                stamp(sl.tryWriteLock(timeout, unit));
            check(sl.validate(stamp()));
            check(!sl.isReadLocked());
            check(sl.isWriteLocked());
        } catch (Throwable x) { thrown(x);
        } finally { if (stamp() != 0L) sl.unlockWrite(stamp()); } }};
}

Example 7

Source File: Basic.java From openjdk-jdk8u-backup with GNU General Public License v2.0

5 votes

static Writer writer(final StampedLock sl, final Phaser gate) {
    return new Writer() { public void run() {
        if (gate != null ) toTheStartingGate(gate);
        try {
            stamp(sl.writeLock());
            check(sl.validate(stamp()));
            check(!sl.isReadLocked());
            check(sl.isWriteLocked());
        } finally { sl.unlockWrite(stamp()); } }};
}

Example 8

Source File: RegionRouteTable.java From sofa-jraft with Apache License 2.0

5 votes

public void addOrUpdateRegion(final Region region) {
    Requires.requireNonNull(region, "region");
    Requires.requireNonNull(region.getRegionEpoch(), "regionEpoch");
    final long regionId = region.getId();
    final byte[] startKey = BytesUtil.nullToEmpty(region.getStartKey());
    final StampedLock stampedLock = this.stampedLock;
    final long stamp = stampedLock.writeLock();
    try {
        this.regionTable.put(regionId, region.copy());
        this.rangeTable.put(startKey, regionId);
    } finally {
        stampedLock.unlockWrite(stamp);
    }
}

Example 9

Source File: StampedLockTest.java From openjdk-jdk9 with GNU General Public License v2.0

5 votes

/**
 * toString indicates current lock state
 */
public void testToString() {
    StampedLock lock = new StampedLock();
    assertTrue(lock.toString().contains("Unlocked"));
    long s = lock.writeLock();
    assertTrue(lock.toString().contains("Write-locked"));
    lock.unlockWrite(s);
    s = lock.readLock();
    assertTrue(lock.toString().contains("Read-locks"));
}

Example 10

Source File: Basic.java From jdk8u60 with GNU General Public License v2.0

5 votes

static Writer writer(final StampedLock sl, final Phaser gate) {
    return new Writer() { public void run() {
        if (gate != null ) toTheStartingGate(gate);
        try {
            stamp(sl.writeLock());
            check(sl.validate(stamp()));
            check(!sl.isReadLocked());
            check(sl.isWriteLocked());
        } finally { sl.unlockWrite(stamp()); } }};
}

Example 11

Source File: Basic.java From native-obfuscator with GNU General Public License v3.0

5 votes

static Writer writer(final StampedLock sl, final Phaser gate) {
    return new Writer() { public void run() {
        if (gate != null ) toTheStartingGate(gate);
        try {
            stamp(sl.writeLock());
            check(sl.validate(stamp()));
            check(!sl.isReadLocked());
            check(sl.isWriteLocked());
        } finally { sl.unlockWrite(stamp()); } }};
}

Example 12

Source File: Basic.java From jdk8u-dev-jdk with GNU General Public License v2.0

5 votes

static Writer writer(final StampedLock sl, final Phaser gate) {
    return new Writer() { public void run() {
        if (gate != null ) toTheStartingGate(gate);
        try {
            stamp(sl.writeLock());
            check(sl.validate(stamp()));
            check(!sl.isReadLocked());
            check(sl.isWriteLocked());
        } finally { sl.unlockWrite(stamp()); } }};
}

Example 13

Source File: StampedLockTest.java From openjdk-jdk9 with GNU General Public License v2.0

5 votes

/**
 * tryOptimisticRead stamp does not validate if a write lock intervenes
 */
public void testValidateOptimisticWriteLocked() {
    final StampedLock lock = new StampedLock();
    final long p = assertValid(lock, lock.tryOptimisticRead());
    final long s = assertValid(lock, lock.writeLock());
    assertFalse(lock.validate(p));
    assertEquals(0L, lock.tryOptimisticRead());
    assertTrue(lock.validate(s));
    lock.unlockWrite(s);
}

Example 14

Source File: Basic.java From openjdk-8 with GNU General Public License v2.0

5 votes

static Writer writer(final StampedLock sl, final Phaser gate) {
    return new Writer() { public void run() {
        if (gate != null ) toTheStartingGate(gate);
        try {
            stamp(sl.writeLock());
            check(sl.validate(stamp()));
            check(!sl.isReadLocked());
            check(sl.isWriteLocked());
        } finally { sl.unlockWrite(stamp()); } }};
}

Example 15

Source File: StampedLockTest.java From openjdk-jdk9 with GNU General Public License v2.0

5 votes

/**
 * A stamp obtained from an unsuccessful lock operation does not validate
 */
public void testValidate2() throws InterruptedException {
    StampedLock lock = new StampedLock();
    long s = assertNonZero(lock.writeLock());
    assertTrue(lock.validate(s));
    assertFalse(lock.validate(lock.tryWriteLock()));
    assertFalse(lock.validate(lock.tryWriteLock(0L, SECONDS)));
    assertFalse(lock.validate(lock.tryReadLock()));
    assertFalse(lock.validate(lock.tryReadLock(0L, SECONDS)));
    assertFalse(lock.validate(lock.tryOptimisticRead()));
    lock.unlockWrite(s);
}

Example 16

Source File: StampedLockTest.java From openjdk-jdk9 with GNU General Public License v2.0

5 votes

/**
 * A serialized lock deserializes as unlocked
 */
public void testSerialization() {
    StampedLock lock = new StampedLock();
    lock.writeLock();
    StampedLock clone = serialClone(lock);
    assertTrue(lock.isWriteLocked());
    assertFalse(clone.isWriteLocked());
    long s = clone.writeLock();
    assertTrue(clone.isWriteLocked());
    clone.unlockWrite(s);
    assertFalse(clone.isWriteLocked());
}

Example 17

Source File: RegionRouteTable.java From sofa-jraft with Apache License 2.0

5 votes

public void splitRegion(final long leftId, final Region right) {
    Requires.requireNonNull(right, "right");
    Requires.requireNonNull(right.getRegionEpoch(), "right.regionEpoch");
    final StampedLock stampedLock = this.stampedLock;
    final long stamp = stampedLock.writeLock();
    try {
        final Region left = this.regionTable.get(leftId);
        Requires.requireNonNull(left, "left");
        final byte[] leftStartKey = BytesUtil.nullToEmpty(left.getStartKey());
        final byte[] leftEndKey = left.getEndKey();
        final long rightId = right.getId();
        final byte[] rightStartKey = right.getStartKey();
        final byte[] rightEndKey = right.getEndKey();
        Requires.requireNonNull(rightStartKey, "rightStartKey");
        Requires.requireTrue(BytesUtil.compare(leftStartKey, rightStartKey) < 0,
            "leftStartKey must < rightStartKey");
        if (leftEndKey == null || rightEndKey == null) {
            Requires.requireTrue(leftEndKey == rightEndKey, "leftEndKey must == rightEndKey");
        } else {
            Requires.requireTrue(BytesUtil.compare(leftEndKey, rightEndKey) == 0, "leftEndKey must == rightEndKey");
            Requires.requireTrue(BytesUtil.compare(rightStartKey, rightEndKey) < 0,
                "rightStartKey must < rightEndKey");
        }
        final RegionEpoch leftEpoch = left.getRegionEpoch();
        leftEpoch.setVersion(leftEpoch.getVersion() + 1);
        left.setEndKey(rightStartKey);
        this.regionTable.put(rightId, right.copy());
        this.rangeTable.put(rightStartKey, rightId);
    } finally {
        stampedLock.unlockWrite(stamp);
    }
}

Example 18

Source File: ForkChainsMonitor.java From nuls-v2 with MIT License

4 votes

@Override
protected void process(int chainId, ChainContext context, NulsLogger commonLog) {
    StampedLock lock = context.getLock();
    long stamp = lock.tryOptimisticRead();
    try {
        for (; ; stamp = lock.writeLock()) {
            if (stamp == 0L) {
                continue;
            }
            // possibly racy reads
            SortedSet<Chain> forkChains = BlockChainManager.getForkChains(chainId);
            if (!lock.validate(stamp)) {
                continue;
            }
            if (forkChains.isEmpty()) {
                break;
            }
            context.printChains();
            //遍历当前分叉链,与主链进行比对,找出最大高度差,与默认参数chainSwtichThreshold对比,确定要切换的分叉链
            Chain masterChain = BlockChainManager.getMasterChain(chainId);
            ChainParameters parameters = context.getParameters();
            int chainSwtichThreshold = parameters.getChainSwtichThreshold();
            Chain switchChain = new Chain();
            int maxHeightDifference = 0;
            for (Chain forkChain : forkChains) {
                int temp = (int) (forkChain.getEndHeight() - masterChain.getEndHeight());
                if (temp > maxHeightDifference) {
                    maxHeightDifference = temp;
                    switchChain = forkChain;
                }
            }
            commonLog.debug("chainId-" + chainId + ", maxHeightDifference:" + maxHeightDifference + ", chainSwtichThreshold:" + chainSwtichThreshold);
            //高度差不够
            if (maxHeightDifference < chainSwtichThreshold) {
                break;
            }
            stamp = lock.tryConvertToWriteLock(stamp);
            if (stamp == 0L) {
                continue;
            }
            // exclusive access
            //进行切换,切换前变更模块运行状态
            context.setStatus(StatusEnum.SWITCHING);
            ConsensusCall.notice(chainId, MODULE_WAITING);
            TransactionCall.notice(chainId, MODULE_WAITING);
            if (BlockChainManager.switchChain(chainId, masterChain, switchChain)) {
                commonLog.info("chainId-" + chainId + ", switchChain success");
            } else {
                commonLog.info("chainId-" + chainId + ", switchChain fail, auto rollback success");
            }
            context.printChains();
            ConsensusCall.notice(chainId, MODULE_WORKING);
            TransactionCall.notice(chainId, MODULE_WORKING);
            break;
        }
    } finally {
        context.setStatus(StatusEnum.RUNNING);
        if (StampedLock.isWriteLockStamp(stamp)) {
            lock.unlockWrite(stamp);
        }
    }
}

Example 19

Source File: OrphanChainsMaintainer.java From nuls-v2 with MIT License

4 votes

@Override
protected void process(int chainId, ChainContext context, NulsLogger commonLog) {
    ChainParameters parameters = context.getParameters();
    int orphanChainMaxAge = parameters.getOrphanChainMaxAge();

    StampedLock lock = context.getLock();
    long stamp = lock.tryOptimisticRead();
    try {
        for (; ; stamp = lock.writeLock()) {
            if (stamp == 0L) {
                continue;
            }
            // possibly racy reads
            SortedSet<Chain> orphanChains = BlockChainManager.getOrphanChains(chainId);
            if (!lock.validate(stamp)) {
                continue;
            }
            if (orphanChains.isEmpty()) {
                break;
            }
            stamp = lock.tryConvertToWriteLock(stamp);
            if (stamp == 0L) {
                continue;
            }
            // exclusive access
            List<Node> availableNodes = NetworkCall.getAvailableNodes(chainId);
            //维护现有孤儿链,尝试在链首增加区块
            context.setStatus(UPDATE_ORPHAN_CHAINS);
            long l = System.nanoTime();
            for (Chain orphanChain : orphanChains) {
                maintainOrphanChain(chainId, orphanChain, availableNodes, orphanChainMaxAge);
                //孤儿链维护时间超过十秒，就退出
                if (System.nanoTime() - l > 10000000000L) {
                    break;
                }
            }
            break;
        }
    } finally {
        context.setStatus(RUNNING);
        if (StampedLock.isWriteLockStamp(stamp)) {
            lock.unlockWrite(stamp);
        }
    }
}

Example 20

Source File: StorageSizeMonitor.java From nuls-v2 with MIT License

4 votes

/**
 * 清理孤儿链
 * @param chainId
 * @param heightRange
 * @param context
 * @param orphanChainMaxAge
 */
private void orphanChainsCleaner(int chainId, int heightRange, ChainContext context, int orphanChainMaxAge) {
    StampedLock lock = context.getLock();
    long stamp = lock.tryOptimisticRead();
    NulsLogger logger = context.getLogger();
    try {
        for (; ; stamp = lock.writeLock()) {
            if (stamp == 0L) {
                continue;
            }
            // possibly racy reads
            //1.清理链起始高度位于主链最新高度增减30(可配置)范围外的孤儿链
            SortedSet<Chain> orphanChains = BlockChainManager.getOrphanChains(chainId);
            if (!lock.validate(stamp)) {
                continue;
            }
            if (orphanChains.isEmpty()) {
                break;
            }
            stamp = lock.tryConvertToWriteLock(stamp);
            if (stamp == 0L) {
                continue;
            }
            // exclusive access
            Chain masterChain = BlockChainManager.getMasterChain(chainId);
            long latestHeight = masterChain.getEndHeight();
            SortedSet<Chain> deleteSet = new TreeSet<>(Chain.COMPARATOR);
            //1.标记
            for (Chain orphanChain : orphanChains) {
                if (Math.abs(orphanChain.getStartHeight() - latestHeight) > heightRange || orphanChain.getAge().get() > orphanChainMaxAge) {
                    //清理orphanChain,并递归清理orphanChain的所有子链
                    deleteSet.add(orphanChain);
                }
            }
            //2.清理
            for (Chain chain : deleteSet) {
                BlockChainManager.deleteOrphanChain(chainId, chain);
                logger.info("remove orphan chain, chain:" + chain);
            }
            break;
        }
    } finally {
        if (StampedLock.isWriteLockStamp(stamp)) {
            lock.unlockWrite(stamp);
        }
    }
}