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See:
Description
Interface Summary | |
---|---|
AsyncMemcacheService | An asynchronous version of MemcacheService . |
BaseMemcacheService | Methods that are common between MemcacheService and
AsyncMemcacheService . |
ConsistentErrorHandler | A marker interface to indicate that all MemcacheServiceException
exceptions should be handled by
ErrorHandler.handleServiceError(MemcacheServiceException) . |
ErrorHandler | Deprecated. Use ConsistentErrorHandler instead |
MemcacheService | The Java API for the App Engine Memcache service. |
MemcacheService.IdentifiableValue | Encapsulates an Object that is returned by MemcacheService.getIdentifiable(java.lang.Object) . |
Stats | Statistics from the cache, available via MemcacheService.getStatistics() |
Class Summary | |
---|---|
ErrorHandlers | Static utility for getting built-in ErrorHandler s. |
Expiration | Expiration specifications on MemcacheService.putAll(Map , Expiration)
and MemcacheService.put(Object, Object, Expiration) operations. |
LogAndContinueErrorHandler | The default error handler, which will cause most service errors to behave as though there were a cache miss, not an error. |
MemcacheSerialization | Static serialization helpers shared by MemcacheServiceImpl and
com.google.appengine.api.memcache.dev.LocalMemcacheService . |
MemcacheSerialization.ValueAndFlags | Tuple of a serialized byte array value and associated flags to interpret that value. |
MemcacheService.CasValues | A holder for compare and set values. |
MemcacheServiceFactory | The factory by which users acquire a handle to the MemcacheService. |
StrictErrorHandler | A strict error handler, which will throw MemcacheServiceException
or InvalidValueException for any service error condition. |
Enum Summary | |
---|---|
MemcacheSerialization.Flag | Values used as flags on the MemcacheService's values. |
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. |
Exception Summary | |
---|---|
InvalidValueException | Thrown when a cache entry has content, but it cannot be read. |
MemcacheServiceException | An exception for backend non-availability or similar error states which may occur, but are not necessarily indicative of a coding or usage error by the application. |
Provides fast but unreliable data storage, also accessible via a JCache interface. Objects may be stored in the cache with an explicit expiration time, but may also be evicted before that expiration to make room for newer, more active entries.
The cache is accessed via a MemcacheService
object,
obtained from the MemcacheServiceFactory
. It offers the
cache as a map from key Object
to value Object
.
In the Development Server, the system property
memcache.maxsize
can be set to limit the available cache,
taking values like "100M" (the default), "10K", or "768" (bytes).
Because the cache offers best-effort data storage, by default
most errors are treated as a cache miss. More explicit error
handling can be installed via
MemcacheService.setErrorHandler(ErrorHandler)
.
MemcacheService
,
The Memcache Java API in the Google App Engine Developer's Guide.,
JCache API
|
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