java.util.concurrent.locks.StampedLock#unlockWrite()源码实例Demo

下面列出了java.util.concurrent.locks.StampedLock#unlockWrite() 实例代码，或者点击链接到github查看源代码，也可以在右侧发表评论。

源代码1 项目： openjdk-8-source 文件： Basic.java

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()); } }};
}

源代码2 项目： dragonwell8_jdk 文件： Basic.java

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()); } }};
}

源代码3 项目： native-obfuscator 文件： Basic.java

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()); } }};
}

源代码4 项目： openjdk-jdk9 文件： Basic.java

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()); } }};
}

源代码5 项目： jdk8u_jdk 文件： Basic.java

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()); } }};
}

源代码6 项目： openjdk-8 文件： Basic.java

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()); } }};
}

源代码7 项目： sofa-jraft 文件： RegionRouteTable.java

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);
    }
}

源代码8 项目： sofa-jraft 文件： RegionRouteTable.java

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);
    }
}

源代码9 项目： openjdk-jdk9 文件： StampedLockTest.java

/**
 * 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());
}

源代码10 项目： openjdk-jdk9 文件： StampedLockTest.java

/**
 * 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);
}

源代码11 项目： openjdk-8 文件： Basic.java

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()); } }};
}

源代码12 项目： openjdk-jdk9 文件： StampedLockTest.java

/**
 * 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);
}

源代码13 项目： jdk8u-dev-jdk 文件： Basic.java

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()); } }};
}

源代码14 项目： native-obfuscator 文件： Basic.java

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()); } }};
}

源代码15 项目： jdk8u60 文件： Basic.java

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()); } }};
}

源代码16 项目： openjdk-jdk9 文件： StampedLockTest.java

/**
 * 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"));
}

源代码17 项目： openjdk-jdk8u-backup 文件： Basic.java

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()); } }};
}

源代码18 项目： nuls-v2 文件： ForkChainsMonitor.java

@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);
        }
    }
}

源代码19 项目： nuls-v2 文件： OrphanChainsMaintainer.java

@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);
        }
    }
}

源代码20 项目： nuls-v2 文件： StorageSizeMonitor.java

/**
 * 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);
        }
    }
}

方法所在类

java.util.concurrent.locks.StampedLock