com.google.appengine.api.datastore.dev
Class LocalDatastoreCostAnalysis

java.lang.Object
  extended by com.google.appengine.api.datastore.dev.LocalDatastoreCostAnalysis

public class LocalDatastoreCostAnalysis
extends java.lang.Object

Utility class that can calculate the cost of writing (put or delete) a given Entity.


Constructor Summary
LocalDatastoreCostAnalysis(com.google.appengine.api.datastore.dev.LocalCompositeIndexManager indexManager)
           
 
Method Summary
 CreationCostAnalysis getCreationCostAnalysis(EntityProto e)
           
 Cost getWriteCost(EntityProto newEntity)
          Determines the cost of writing this entity, assuming no previous value exists.
 Cost getWriteOps(EntityProto oldEntity, EntityProto newEntity)
          Determines the cost of writing newEntity, assuming its current state in the datastore matches oldEntity.
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

LocalDatastoreCostAnalysis

public LocalDatastoreCostAnalysis(com.google.appengine.api.datastore.dev.LocalCompositeIndexManager indexManager)
Method Detail

getCreationCostAnalysis

public CreationCostAnalysis getCreationCostAnalysis(EntityProto e)

getWriteCost

public Cost getWriteCost(EntityProto newEntity)
Determines the cost of writing this entity, assuming no previous value exists.

Parameters:
newEntity - The entity whose write cost we are determining.
Returns:
The cost of writing the given entity.

getWriteOps

public Cost getWriteOps(EntityProto oldEntity,
                        EntityProto newEntity)
Determines the cost of writing newEntity, assuming its current state in the datastore matches oldEntity.

Parameters:
oldEntity - Entity representing the current state in the datastore. Can be null.
newEntity - Entity representing the desired state in the datastore.
Returns:
The cost of writing newEntity.