Enum LockMode

    • Enum Constant Summary

      Enum Constants 
      Enum Constant Description
      Exclusive
      The ExclusiveLock can be compared with the writelock of a traditional read/write lock.
      None
      No locking is done.
      Read
      The LockMode.Read prevents others to acquire the Write/Exclusive-lock, but it allows others to acquire the Read lock.
      Write
      The LockMode.Write prevents others to acquire the Read/Write/Exclusive-lock.
    • Constructor Summary

      Constructors 
      Modifier Constructor Description
      private LockMode​(int lockModeAsInt)  
    • Method Summary

      All Methods Static Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      int asInt()  
      static LockMode valueOf​(java.lang.String name)
      Returns the enum constant of this type with the specified name.
      static LockMode[] values()
      Returns an array containing the constants of this enum type, in the order they are declared.
      • Methods inherited from class java.lang.Enum

        clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf
      • Methods inherited from class java.lang.Object

        getClass, notify, notifyAll, wait, wait, wait
    • Enum Constant Detail

      • None

        public static final LockMode None
        No locking is done.
      • Read

        public static final LockMode Read
        The LockMode.Read prevents others to acquire the Write/Exclusive-lock, but it allows others to acquire the Read lock. Unlike a traditional read/write-lock, it doesn't have to mean that other transactions can't write, it only prevents others from committing.
      • Write

        public static final LockMode Write
        The LockMode.Write prevents others to acquire the Read/Write/Exclusive-lock. Unlike a traditional read-write lock, it doesn't have to mean that other transactions can't read or write, they only can't commit since the Exclusive lock is acquired for that (managed by the STM).
      • Exclusive

        public static final LockMode Exclusive
        The ExclusiveLock can be compared with the writelock of a traditional read/write lock. once the Exclusive lock is acquired no other transaction can acquire any lock or can do any reading/writing (unless the transaction previously has read the transactional object).

        The ExclusiveLock is the Lock acquired by the STM once a Txn is prepared for writing changes to a TxnObject.

    • Field Detail

      • lockModeAsInt

        private int lockModeAsInt
    • Constructor Detail

      • LockMode

        private LockMode​(int lockModeAsInt)
    • Method Detail

      • values

        public static LockMode[] values()
        Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:
        for (LockMode c : LockMode.values())
            System.out.println(c);
        
        Returns:
        an array containing the constants of this enum type, in the order they are declared
      • valueOf

        public static LockMode valueOf​(java.lang.String name)
        Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)
        Parameters:
        name - the name of the enum constant to be returned.
        Returns:
        the enum constant with the specified name
        Throws:
        java.lang.IllegalArgumentException - if this enum type has no constant with the specified name
        java.lang.NullPointerException - if the argument is null
      • asInt

        public int asInt()