com.facebook.buck.core.graph.transformation

Interface GraphEngineCache<Key extends ComputeKey<Value>,Value extends ComputeResult>

Type Parameters:

Key - Key to the cache

Value - Value stored by Cache

All Known Subinterfaces:

RuleAnalysisCache

All Known Implementing Classes:

BuildFileManifestCache, DirectoryListCache, FileTreeCache, NoOpGraphEngineCache, RuleAnalysisCacheImpl

public interface GraphEngineCache<Key extends ComputeKey<Value>,Value extends ComputeResult>

Interface for a Cache object that GraphTransformationEngine uses to store results that have finished computing so that the results can be reused.

The cache should be thread safe

Method Summary

Modifier and Type	Method and Description
Optional<Value>	get(Key key) Optionally returns the cached result given the key
void	put(Key key, Value value) Offers the given key and value for caching

Method Detail

get

Optional<Value> get(Key key)

Optionally returns the cached result given the key

Parameters:

key - The desired key

Returns:

the result if cached, otherwise an empty Optional

put

void put(Key key,
         Value value)

Offers the given key and value for caching

Parameters:

key - the key to cache

value - the value to cache