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java.lang.Object de.grogra.util.LockableImpl
public class LockableImpl
Nested Class Summary |
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Nested classes/interfaces inherited from interface de.grogra.util.Lockable |
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Lockable.DeadLockException |
Constructor Summary | |
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LockableImpl()
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Method Summary | |
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protected void |
enterWriteLock()
|
void |
execute(LockProtectedRunnable task,
boolean write)
Asynchronously executes a task such that it possesses
a lock on this Lockable . |
void |
execute(LockProtectedRunnable task,
Lock retained)
Asynchronously executes a task using a lock which
has been retained before within another task. |
void |
executeForcedly(LockProtectedRunnable task,
boolean write)
Synchronously executes a task such that it possesses
a lock on this Lockable . |
void |
executeForcedly(LockProtectedRunnable task,
Lock retained)
Synchronously executes a task using a lock which
has been retained before within another task. |
protected void |
executeInAllowedThread(java.lang.Runnable r)
|
long |
getMaxWaitingTime()
Returns the waiting time of the pending task which is waiting longest, or -1 if there is no pending task. |
int |
getQueueLength()
Returns the current number of tasks which are waiting for locked execution. |
protected void |
invokeRun(LockProtectedRunnable task,
boolean sync,
Lock lock)
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protected boolean |
isAllowedThread(boolean write)
|
boolean |
isLocked(boolean write)
Determines if the current thread has a lock for this Lockable . |
protected void |
leaveWriteLock()
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Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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public LockableImpl()
Method Detail |
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protected void enterWriteLock()
public void execute(LockProtectedRunnable task, boolean write)
Lockable
task
such that it possesses
a lock on this Lockable
. Note that the execution
is asynchronous, so that the thread in which
the task will actually be executed may differ from the current thread.
execute
in interface Lockable
task
- the task to executewrite
- shall a write lock be obtained?public void execute(LockProtectedRunnable task, Lock retained)
Lockable
task
using a lock which
has been retained before within another task.
Note that the execution
is asynchronous, so that the thread in which
the task will actually be executed may differ from the current thread.
execute
in interface Lockable
task
- the task to executeretained
- the previously retained lockLock.retain()
public void executeForcedly(LockProtectedRunnable task, boolean write) throws java.lang.InterruptedException, Lockable.DeadLockException
Lockable
task
such that it possesses
a lock on this Lockable
. The execution
is performed in the current thread.
executeForcedly
in interface Lockable
task
- the task to executewrite
- shall a write lock be obtained?
java.lang.InterruptedException
Lockable.DeadLockException
public void executeForcedly(LockProtectedRunnable task, Lock retained) throws java.lang.InterruptedException
Lockable
task
using a lock which
has been retained before within another task. The execution
is performed in the current thread.
executeForcedly
in interface Lockable
task
- the task to executeretained
- the previously retained lock
java.lang.InterruptedException
Lock.retain()
protected void executeInAllowedThread(java.lang.Runnable r)
public long getMaxWaitingTime()
Lockable
-1
if there is no pending task.
getMaxWaitingTime
in interface Lockable
public int getQueueLength()
Lockable
getQueueLength
in interface Lockable
protected void invokeRun(LockProtectedRunnable task, boolean sync, Lock lock)
protected boolean isAllowedThread(boolean write)
public boolean isLocked(boolean write)
Lockable
Lockable
.
isLocked
in interface Lockable
write
- check for write locks only (true
)
or for both read and write locks (false
)
true
if the current thread has a lockprotected void leaveWriteLock()
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