Package org.apache.jena.shared

Class LockMRSW

  • All Implemented Interfaces:
    Lock
    public class LockMRSW
extends java.lang.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

      • Field Summary

        • Fields inherited from interface org.apache.jena.shared.Lock

          READ, WRITE

      • Constructor Summary

        Constructors 
        Constructor Description
        LockMRSW()  

      • Method Summary

        All Methods Instance Methods Concrete Methods 
        Modifier and Type Method Description
        void enterCriticalSection​(boolean readLockRequested)
        Application controlled locking - enter a critical section.
        void leaveCriticalSection()
        Application controlled locking - leave a critical section.

        • Methods inherited from class java.lang.Object

          equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

      • Constructor Detail

        • LockMRSW

          public LockMRSW()

      • Method Detail

        • 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:
          Lock.leaveCriticalSection()