MemcacheService.SetPolicy (Google App Engine API for Java)

com.google.appengine.api.memcache

Enum MemcacheService.SetPolicy

• java.lang.Object
• • java.lang.Enum<MemcacheService.SetPolicy>
  • • com.google.appengine.api.memcache.MemcacheService.SetPolicy

• All Implemented Interfaces:

  java.io.Serializable, java.lang.Comparable<MemcacheService.SetPolicy>

  Enclosing interface:

  MemcacheService

  ---

  
  

  public static enum MemcacheService.SetPolicy
  extends java.lang.Enum<MemcacheService.SetPolicy>

  Cache replacement strategies for MemcacheService.put(java.lang.Object, java.lang.Object, com.google.appengine.api.memcache.Expiration, com.google.appengine.api.memcache.MemcacheService.SetPolicy) operations, indicating how to handle putting a value that already exists.

• • Enum Constant Summary

    Enum Constants 

    Enum Constant and Description
    ADD_ONLY_IF_NOT_PRESENT An additive-only strategy, useful to avoid race conditions.
    REPLACE_ONLY_IF_PRESENT A replace-only strategy.
    SET_ALWAYS Always stores the new value.

  • Method Summary

    All Methods Static Methods Concrete Methods 

    Modifier and Type	Method and Description
    static MemcacheService.SetPolicy	valueOf(java.lang.String name) Returns the enum constant of this type with the specified name.
    static MemcacheService.SetPolicy[]	values() Returns an array containing the constants of this enum type, in the order they are declared.

    • Methods inherited from class java.lang.Enum

      compareTo, equals, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

    • Methods inherited from class java.lang.Object

      getClass, notify, notifyAll, wait, wait, wait

• • Enum Constant Detail

    • SET_ALWAYS

      public static final MemcacheService.SetPolicy SET_ALWAYS

      Always stores the new value. If an existing value was stored with the given key, it will be discarded and replaced.

    • ADD_ONLY_IF_NOT_PRESENT

      public static final MemcacheService.SetPolicy ADD_ONLY_IF_NOT_PRESENT

      An additive-only strategy, useful to avoid race conditions.

    • REPLACE_ONLY_IF_PRESENT

      public static final MemcacheService.SetPolicy REPLACE_ONLY_IF_PRESENT

      A replace-only strategy.

  • Method Detail

    • values

      public static MemcacheService.SetPolicy[] 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 (MemcacheService.SetPolicy c : MemcacheService.SetPolicy.values())
          System.out.println(c);
      

      Returns:

      an array containing the constants of this enum type, in the order they are declared

    • valueOf

      public static MemcacheService.SetPolicy 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