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java.lang.Object
ca.odell.glazedlists.util.concurrent.J2SE14ReadWriteLock.ReadLock
public static class J2SE14ReadWriteLock.ReadLock
extends java.lang.Object
implements Lock, java.io.Serializable
J2SE14ReadWriteLock.readLock()
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Method Summary | |
void |
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void |
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String |
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boolean |
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void |
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protected ReadLock(J2SE14ReadWriteLock lock)
Constructor for use by subclasses
- Parameters:
lock
- the outer lock object
public void lock()
Acquires the read lock. Acquires the read lock if the write lock is not held by another thread and returns immediately. If the write lock is held by another thread then the current thread becomes disabled for thread scheduling purposes and lies dormant until the read lock has been acquired.
public void lockInterruptibly() throws InterruptedException
Acquires the read lock unless the current thread is interrupted. Acquires the read lock if the write lock is not held by another thread and returns immediately. If the write lock is held by another thread then the current thread becomes disabled for thread scheduling purposes and lies dormant until one of two things happens:If the current thread:
- The read lock is acquired by the current thread; or
- Some other thread interrupts the current thread.
then
- has its interrupted status set on entry to this method; or
- is interrupted while acquiring the read lock,
InterruptedException
is thrown and the current thread's interrupted status is cleared. In this implementation, as this method is an explicit interruption point, preference is given to responding to the interrupt over normal or reentrant acquisition of the lock.
public String toString()
Returns a string identifying this lock, as well as its lock state. The state, in brackets, includes the String"Read locks ="
followed by the number of held read locks.
- Returns:
- a string identifying this lock, as well as its lock state
public boolean tryLock()
Acquires the read lock only if the write lock is not held by another thread at the time of invocation. Acquires the read lock if the write lock is not held by another thread and returns immediately with the valuetrue
. Even when this lock has been set to use a fair ordering policy, a call totryLock()
will immediately acquire the read lock if it is available, whether or not other threads are currently waiting for the read lock. This "barging" behavior can be useful in certain circumstances, even though it breaks fairness. If you want to honor the fairness setting for this lock, then usetryLock(0, TimeUnit.SECONDS)
which is almost equivalent (it also detects interruption). If the write lock is held by another thread then this method will return immediately with the valuefalse
.
- Returns:
true
if the read lock was acquired