Package org.apache.jena.shared

Class LockMRSW

java.lang.Object
org.apache.jena.shared.LockMRSW
All Implemented Interfaces:
Lock
public class LockMRSW extends Object implements Lock
Lock implementation using a Multiple Reader, Single Writer policy. All the locking work is done by the imported WriterPreferenceReadWriteLock. This class adds:
  • The same thread that acquired a lock should release it
  • Lock promotion (turning read locks into write locks) is detached as an error

    • Constructor Details

      • LockMRSW

        public LockMRSW()

    • Method Details

      • enterCriticalSection

        public final void enterCriticalSection(boolean readLockRequested)
        Application controlled locking - enter a critical section. Locking is reentrant so an application can have nested critical sections. Typical code: 
          try {
     enterCriticalSection(Lock.READ) ;
     ... application code ...
  } finally { leaveCriticalSection() ; }
        Specified by:
        enterCriticalSection in interface Lock
        Parameters:
        readLockRequested - true implies a read lock, false implies write lock.
        See Also:

      • leaveCriticalSection

        public final void leaveCriticalSection()
        Application controlled locking - leave a critical section.
        Specified by:
        leaveCriticalSection in interface Lock
        See Also: