org.apache.iotdb.db.engine.storagegroup

类 TsFileLock

java.lang.Object

org.apache.iotdb.db.engine.storagegroup.TsFileLock

public class TsFileLock
extends Object

TsFileLock is a special read-write lock that can be locked by one thread but unlocked by another thread.

When the query thread crashes, the locks it used can no longer be unlocked by itself and another thread must do the unlock for it. Unfortunately, normal Java ReentrantLock can only be unlocked by the thread which locked it, so we have to use a different implementation. It is also interesting to use a third-party implementation and if you do find a better one, please submit an issue on our website.

WARNING: as the lock holder is not recorded, the caller must assure that lock() and unlock() match, i.e., if you only call lock() once then do not call unlock() more than once and vice versa.

构造器概要

构造器

构造器和说明
TsFileLock()

方法概要

限定符和类型	方法和说明
void	readLock()
void	readUnlock()
boolean	tryReadLock()
boolean	tryWriteLock()
void	writeLock()
void	writeUnlock()

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

构造器详细资料

TsFileLock

public TsFileLock()

方法详细资料

readLock

public void readLock()

readUnlock

public void readUnlock()

writeLock

public void writeLock()

writeUnlock

public void writeUnlock()

tryWriteLock

public boolean tryWriteLock()

tryReadLock

public boolean tryReadLock()