Package org.eclipse.rdf4j.common.concurrent.locks

Class ReadPrefReadWriteLockManager

java.lang.Object
org.eclipse.rdf4j.common.concurrent.locks.AbstractReadWriteLockManager
org.eclipse.rdf4j.common.concurrent.locks.ReadPrefReadWriteLockManager
All Implemented Interfaces:
ReadWriteLockManager
public class ReadPrefReadWriteLockManager extends AbstractReadWriteLockManager
A read/write lock manager with reader preference. This lock manager block any requests for write locks until all read locks have been released.
Author:
Arjohn Kampman, James Leigh

  • Constructor Details

    • ReadPrefReadWriteLockManager

      public ReadPrefReadWriteLockManager()
      Creates a MultiReadSingleWriteLockManager.

    • ReadPrefReadWriteLockManager

      public ReadPrefReadWriteLockManager​(boolean trackLocks)
      Creates a new MultiReadSingleWriteLockManager, optionally with lock tracking enabled.
      Parameters:
      trackLocks - Controls whether the lock manager will keep track of active locks. Enabling lock tracking will add some overhead, but can be very useful for debugging.

  • Method Details

    • tryReadLock

      public Lock tryReadLock()
      Gets a read lock, if available. This method will return null if the read lock is not immediately available.

    • getReadLock

      public Lock getReadLock() throws InterruptedException
      Gets a read lock. This method blocks when a write lock is in use or has been requested until the write lock is released.
      Throws:
      InterruptedException - In case the thread requesting the lock was interrupted.

    • tryWriteLock

      public Lock tryWriteLock()
      Gets an exclusive write lock, if available. This method will return null if the write lock is not immediately available.

    • getWriteLock

      public Lock getWriteLock() throws InterruptedException
      Gets an exclusive write lock. This method blocks when the write lock is in use or has already been requested until the write lock is released. This method also block when read locks are active until all of them are released.
      Throws:
      InterruptedException - In case the thread requesting the lock was interrupted.