TsFileLock (IoTDB Server 0.14.0-preview2 API)

java.lang.Object
- org.apache.iotdb.db.engine.storagegroup.TsFileLock

```
public class TsFileLock
extends java.lang.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.

Constructor Summary

Constructors
Constructor Description

TsFileLock()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`readLock()`
`void`	`readUnlock()`
`boolean`	`tryReadLock()`
`boolean`	`tryWriteLock()`
`void`	`writeLock()`
`void`	`writeUnlock()`

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail
- TsFileLock
```
public TsFileLock()
```

Method Detail

readLock
```
public void readLock()
```

readUnlock
```
public void readUnlock()
```

writeLock
```
public void writeLock()
```

writeUnlock
```
public void writeUnlock()
```

tryWriteLock
```
public boolean tryWriteLock()
```

tryReadLock
```
public boolean tryReadLock()
```