tachyon.worker

Class BlocksLocker

java.lang.Object

tachyon.worker.BlocksLocker

public class BlocksLocker
extends Object

Handle local block locking.

Constructor Summary

Constructors

Constructor and Description
BlocksLocker(WorkerStorage workerStorage, int userId)

Method Summary

Methods

Modifier and Type	Method and Description
int	getLockId() Get new lock id
StorageDir	lock(long blockId, int blockLockId) Lock a block with specified lock id.
StorageDir	locked(long blockId) Get StorageDir in which the block is locked
boolean	unlock(long blockId, int lockId) Unlock a block with a lock id.

Methods inherited from class java.lang.Object

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

Constructor Detail

BlocksLocker

public BlocksLocker(WorkerStorage workerStorage,
            int userId)

Method Detail

lock

public StorageDir lock(long blockId,
              int blockLockId)

Lock a block with specified lock id.

Parameters:

blockId - The id of the block.

blockLockId - The lock id of the block

Returns:

the StorageDir in which this block is locked.

getLockId

public int getLockId()

Get new lock id

Returns:

the lock id

locked

public StorageDir locked(long blockId)

Get StorageDir in which the block is locked

Parameters:

blockId - The id of the block

Returns:

the StorageDir in which the block is locked

unlock

public boolean unlock(long blockId,
             int lockId)

Unlock a block with a lock id.

Parameters:

blockId - The id of the block.

lockId - The lock id of the lock.

Returns:

true if success, false otherwise