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

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

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