Package com.google.ads.googleads.lib.logging.scrub

Class FieldDescriptorCache

java.lang.Object

com.google.ads.googleads.lib.logging.scrub.FieldDescriptorCache

public class FieldDescriptorCache
extends Object

Caches the results of looking up fields in a protobuf message's Descriptor.

Empirical testing suggests that the first request for a message's descriptor is quite slow, for instance GoogleAdsRow takes about 0.5 seconds. Future requests to the protobuf descriptor API take around 3 usec. This cache reduces the ongoing lookup time to around 1 usec, but still suffers from the slow initial request performance.

Method Summary

Modifier and Type	Method	Description
static FieldDescriptorCache	getDefault()	Obtains a global instance of the cache.
Optional<com.google.protobuf.Descriptors.FieldDescriptor>	lookupField(String fieldName, com.google.protobuf.MessageOrBuilder containingMessage)	Retrieves a named field from a MessageOrBuilder.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Details

getDefault

public static FieldDescriptorCache getDefault()

Obtains a global instance of the cache.

lookupField

public Optional<com.google.protobuf.Descriptors.FieldDescriptor> lookupField(String fieldName,
 com.google.protobuf.MessageOrBuilder containingMessage)

Retrieves a named field from a MessageOrBuilder. If the field is not in the cache then it is first populated and then returned.