# Uses of Class com.sleepycat.db.Lock (Oracle - Berkeley DB Java API)
Date: 2017-04-13

## Uses of Class
com.sleepycat.db.Lock

Packages that use Lock
com.sleepycat.db: Berkeley DB Java API [reference guide] [Java programming notes].

### Uses of Lock in com.sleepycat.db

Methods in com.sleepycat.db that return Lock
`Lock` LockNotGrantedException.`getLock()` Returns null when `Environment.getLock` was called, and returns the lock in the failed LockRequest when `Environment.lockVector` was called.
`Lock` LockRequest.`getLock()` Return the lock reference.
`Lock` Environment.`getLock(int locker, boolean noWait, DatabaseEntry object, LockRequestMode mode)` Acquire a lock from the lock table returning information about it in the Lock parameter.

Methods in com.sleepycat.db with parameters of type Lock
`void` Environment.`putLock(Lock lock)` Release a lock.
`void` LockRequest.`setLock(Lock lock)` Set the lock reference.

Constructors in com.sleepycat.db with parameters of type Lock
Constructor and Description
`LockRequest(LockOperation op, LockRequestMode mode, DatabaseEntry obj, Lock lock)` Construct a LockRequest with the specified operation, mode and lock, for the specified object.
`LockRequest(LockOperation op, LockRequestMode mode, DatabaseEntry obj, Lock lock, int timeout)` Construct a LockRequest with the specified operation, mode, lock and timeout for the specified object.