Package javax.ejb

Enum LockType


  • public enum LockType
extends java.lang.Enum<LockType>
    Concurrency lock type for singleton beans with container-managed concurrency.
    Since:
    EJB 3.1

    • Enum Constant Summary

      Enum Constants 
      Enum Constant Description
      READ
      For read-only operations.
      WRITE
      For exclusive access to the bean instance.

    • Method Summary

      All Methods Static Methods Concrete Methods 
      Modifier and Type Method Description
      static LockType valueOf​(java.lang.String name)
      Returns the enum constant of this type with the specified name.
      static LockType[] 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

      • READ

        public static final LockType READ
        For read-only operations. Allows simultaneous access to methods designated as READ, as long as no WRITE lock is held.

      • WRITE

        public static final LockType WRITE
        For exclusive access to the bean instance. A WRITE lock can only be acquired when no other method with either a READ or WRITE lock is currently held.

    • Method Detail

      • values

        public static LockType[] 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 (LockType c : LockType.values())
    System.out.println(c);
        Returns:
        an array containing the constants of this enum type, in the order they are declared

      • valueOf

        public static LockType 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