Java Doc for Lock.java in  » Database-DBMS » db-derby-10.2 » org » apache » derby » impl » services » locks » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Database DBMS » db derby 10.2 » org.apache.derby.impl.services.locks   Source Cross Reference   Class Diagram   Java Document (Java Doc)   java.lang.Object    org.apache.derby.impl.services.locks.Lock All known Subclasses:   org.apache.derby.impl.services.locks.ActiveLock, Lock public class Lock implements Latch,Control(Code) A Lock represents a granted or waiting lock request. MT - Mutable - Immutable identity : Thread Aware Field Summary  int count      Constructor Summary protected   Lock(Object space, Lockable ref, Object qualifier)      Method Summary public  void addWaiters(java.util.Dictionary waiters)      final  Lock copy()      final public  boolean equals(Object other)      public  ActiveLock firstWaiter()      final public  Object getCompatabilitySpace()      final public  int getCount()      Return the count of locks. public  Lock getFirstGrant()      public  List getGranted()      public  Lock getLock(Object compatabilitySpace, Object qualifier)      public  LockControl getLockControl()      final public  Lockable getLockable()      final public  Object getQualifier()      Return the qualifier lock was obtained with. public  List getWaiting()       void grant()      final public  int hashCode()      public  boolean isEmpty()      public  boolean isGrantable(boolean noWaitersBeforeMe, Object compatabilitySpace, Object requestQualifier)      public  Control shallowClone()      We can return ourselves here because our identity is immutable and what we returned will not be accessed as a Lock, so the count cannot be changed.  int unlock(int unlockCount)      public  boolean unlock(Latch lockInGroup, int unlockCount)      Field Detail count int count(Code) Constructor Detail Lock protected Lock(Object space, Lockable ref, Object qualifier)(Code) Method Detail addWaiters public void addWaiters(java.util.Dictionary waiters)(Code) copy final Lock copy()(Code) equals final public boolean equals(Object other)(Code) firstWaiter public ActiveLock firstWaiter()(Code) getCompatabilitySpace final public Object getCompatabilitySpace()(Code) Return the compatability space this lock is held in MT - Thread safe getCount final public int getCount()(Code) Return the count of locks. MT - Thread safe getFirstGrant public Lock getFirstGrant()(Code) getGranted public List getGranted()(Code) getLock public Lock getLock(Object compatabilitySpace, Object qualifier)(Code) getLockControl public LockControl getLockControl()(Code) getLockable final public Lockable getLockable()(Code) Return the object this lock is held on MT - Thread safe getQualifier final public Object getQualifier()(Code) Return the qualifier lock was obtained with. MT - Thread safe getWaiting public List getWaiting()(Code) grant void grant()(Code) hashCode final public int hashCode()(Code) isEmpty public boolean isEmpty()(Code) isGrantable public boolean isGrantable(boolean noWaitersBeforeMe, Object compatabilitySpace, Object requestQualifier)(Code) shallowClone public Control shallowClone()(Code) We can return ourselves here because our identity is immutable and what we returned will not be accessed as a Lock, so the count cannot be changed. unlock int unlock(int unlockCount)(Code) unlock public boolean unlock(Latch lockInGroup, int unlockCount)(Code) Methods inherited from java.lang.Object native protected Object clone() throws CloneNotSupportedException(Code)(Java Doc) public boolean equals(Object obj)(Code)(Java Doc) protected void finalize() throws Throwable(Code)(Java Doc) final native public Class getClass()(Code)(Java Doc) native public int hashCode()(Code)(Java Doc) final native public void notify()(Code)(Java Doc) final native public void notifyAll()(Code)(Java Doc) public String toString()(Code)(Java Doc) final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc) final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc) final public void wait() throws InterruptedException(Code)(Java Doc)