CheckpointTimeoutLock (Ignite 2.17.0)

java.lang.Object
- org.apache.ignite.internal.processors.cache.persistence.checkpoint.CheckpointTimeoutLock

```
public class CheckpointTimeoutLock
extends Object
```
Checkpoint lock for outer usage which should be used to protect data during writing to memory. It contains complex logic for the correct taking of inside checkpoint lock(timeout, force checkpoint, etc.).

Field Summary

Fields
Modifier and Type Field Description

protected IgniteLogger log
Ignite logger.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`boolean`	`checkpointLockIsHeldByThread()`
`void`	`checkpointReadLock()`	Gets the checkpoint read lock.
`long`	`checkpointReadLockTimeout()`	Timeout for checkpoint read lock acquisition.
`void`	`checkpointReadLockTimeout(long val)`	Sets timeout for checkpoint read lock acquisition.
`void`	`checkpointReadUnlock()`	Releases the checkpoint read lock.
`void`	`start()`	Prepare the lock to further usage.
`void`	`stop()`	Forbid to take this lock.

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

- Field Detail
  - log
```
protected final IgniteLogger log
```
    Ignite logger.
- Method Detail
  - checkpointReadLock
```
public void checkpointReadLock()
```
    Gets the checkpoint read lock. While this lock is held, checkpoint thread will not acquireSnapshotWorker memory state.
    
    Throws:
    
    IgniteException - If failed.
  - checkpointReadUnlock
```
public void checkpointReadUnlock()
```
    Releases the checkpoint read lock.
  - checkpointReadLockTimeout
```
public long checkpointReadLockTimeout()
```
    Timeout for checkpoint read lock acquisition.
    
    Returns:
    
    Timeout for checkpoint read lock acquisition in milliseconds.
  - checkpointReadLockTimeout
```
public void checkpointReadLockTimeout(long val)
```
    Sets timeout for checkpoint read lock acquisition.
    
    Parameters:
    
    val - New timeout in milliseconds, non-positive value denotes infinite timeout.
  - checkpointLockIsHeldByThread
```
public boolean checkpointLockIsHeldByThread()
```
    Returns:
    
    true if checkpoint lock is held by current thread
  - stop
```
public void stop()
```
    Forbid to take this lock.
  - start
```
public void start()
```
    Prepare the lock to further usage.