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Java Source Code / Java Documentation » IDE Netbeans » performance » threaddemo.locking 
Source Cross Reference  Class Diagram Java Document (Java Doc) 


threaddemo.locking.RWLock

All known Subclasses:   threaddemo.locking.MonitorLock,  threaddemo.locking.EventLock,  threaddemo.locking.EventHybridLock,
RWLock
public interface RWLock (Code)
Some kind of a lock, with support for possible read and write modes.

Examples of use:

 Lock m = Locks.readWriteLock("foo", 0);
 // Grant write access, compute an integer and return it:
 return m.write(new LockAction() {
 public Integer run() {
 return 1;
 }
 });
 // Obtain read access, do some computation, possibly throw an IOException:
 m.read(new LockExceptionAction() {
 public Void run() throws IOException {
 if (...) throw new IOException();
 return null;
 }
 });
 

See Also:   Locks
author:
   Jesse Glick




Method Summary
 booleancanRead()
     Check if the current thread is holding a read or write lock.
 booleancanWrite()
     Check if the current thread is holding the write lock.
 Tread(LockAction<T> action)
     Run an action only with read access.
 Tread(LockExceptionAction<T, E> action)
     Run an action with read access and possibly throw a checked exception.
 voidread(Runnable action)
     Run an action with read access, returning no result.
 voidreadLater(Runnable action)
     Run an action asynch with read access.
 Twrite(LockAction<T> action)
     Run an action with write access.
 Twrite(LockExceptionAction<T, E> action)
     Run an action with write access and possibly throw an exception.
 voidwrite(Runnable action)
     Run an action with write access and return no result.
 voidwriteLater(Runnable action)
     Run an action asynchronously with write access.



Method Detail
canRead
boolean canRead()(Code)
Check if the current thread is holding a read or write lock. true if either read or write access is available



canWrite
boolean canWrite()(Code)
Check if the current thread is holding the write lock. Note that this will be false in case write access was entered and then read access was entered inside of that, until the nested read access is again exited. true if write access is available



read
T read(LockAction<T> action)(Code)
Run an action only with read access.
Parameters:
  action - the action to perform the object returned from LockAction.run



read
T read(LockExceptionAction<T, E> action) throws E(Code)
Run an action with read access and possibly throw a checked exception. Note that runtime exceptions are always passed through, and neither require this invocation style, nor are encapsulated.
Parameters:
  action - the action to execute the object returned from LockExceptionAction.run
throws:
  E - a checked exception, if any
throws:
  RuntimeException - if any runtime exception is thrown from the run method
See Also:   RWLock.read(LockAction)



read
void read(Runnable action)(Code)
Run an action with read access, returning no result.
Parameters:
  action - the action to perform
See Also:   RWLock.read(LockAction)



readLater
void readLater(Runnable action)(Code)
Run an action asynch with read access.
Parameters:
  action - the action to perform
See Also:   RWLock.read(Runnable)



write
T write(LockAction<T> action)(Code)
Run an action with write access.

May not be called while holding read access.
Parameters:
  action - the action to perform the result of LockAction.run




write
T write(LockExceptionAction<T, E> action) throws E(Code)
Run an action with write access and possibly throw an exception.

May not be called while holding read access.
Parameters:
  action - the action to execute the result of LockExceptionAction.run
throws:
  E - a checked exception, if any
throws:
  RuntimeException - if a runtime exception is thrown in the action
See Also:   RWLock.write(LockAction)
See Also:   RWLock.read(LockExceptionAction)




write
void write(Runnable action)(Code)
Run an action with write access and return no result.
Parameters:
  action - the action to perform
See Also:   RWLock.write(LockAction)
See Also:   RWLock.read(Runnable)



writeLater
void writeLater(Runnable action)(Code)
Run an action asynchronously with write access.
Parameters:
  action - the action to perform
See Also:   RWLock.write(LockAction)
See Also:   RWLock.readLater(Runnable)



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