Package com.google.appengine.api.memcache

Interface ConsistentErrorHandler

All Superinterfaces:
ErrorHandler
All Known Implementing Classes:
ConsistentLogAndContinueErrorHandler, StrictErrorHandler
public interface ConsistentErrorHandler extends ErrorHandler
A marker interface to indicate that all MemcacheServiceException exceptions should be handled by ErrorHandler.handleServiceError(MemcacheServiceException). This interface was added to enable handling MemcacheServiceException thrown by the various MemcacheService.put(Object, Object) methods while preserving backward compatibility with ErrorHandler which did not handle such cases.

  • Method Details

    • handleDeserializationError

      void handleDeserializationError(InvalidValueException ivx)
      Description copied from interface: ErrorHandler
      Handles deserialization errors. This method is called from either of the get methods, if the retrieved value cannot be deserialized. This normally indicates an application upgrade since the cache entry was stored, and should thus be treated as a cache miss, which is the behavior of LogAndContinueErrorHandler (the default).
      Specified by:
      handleDeserializationError in interface ErrorHandler

    • handleServiceError

      void handleServiceError(MemcacheServiceException ex)
      Description copied from interface: ErrorHandler
      Handles back-end service errors. This method is called from most of the MemcacheService methods in the event of a service error. This is also called for MemcacheService.put(Object, Object) when the combined key and value size is too large.

      The handler may throw any RuntimeException, or it may simply return for "permissive" error handling, which will generally emulate behavior of a cache miss due to a discarded entry.

      Specified by:
      handleServiceError in interface ErrorHandler
      Parameters:
      ex - the service error exception