com.google.appengine.api.memcache
Enum MemcacheService.SetPolicy
- java.lang.Object
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- java.lang.Enum<MemcacheService.SetPolicy>
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- com.google.appengine.api.memcache.MemcacheService.SetPolicy
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- 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 forMemcacheService.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.
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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.
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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.
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Enum Constant Detail
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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.
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ADD_ONLY_IF_NOT_PRESENT
public static final MemcacheService.SetPolicy ADD_ONLY_IF_NOT_PRESENT
An additive-only strategy, useful to avoid race conditions.
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REPLACE_ONLY_IF_PRESENT
public static final MemcacheService.SetPolicy REPLACE_ONLY_IF_PRESENT
A replace-only strategy.
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Method Detail
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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
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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 namejava.lang.NullPointerException
- if the argument is null
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