UnskippedBuildEngineActionTracker (Buck)

```
public class UnskippedBuildEngineActionTracker
extends Object
```
Keeps track of the number of BuildEngineAction that either were already executed or might be executed in the future. This class assumes that a BuildEngineAction that was not yet executed might be executed in the future if either there is a dependency path from a top level BuildEngineAction to this BuildEngineAction such that no rule on the path was yet executed or the rule is a runtime dependency of a rule fulfilling the previous condition. This model is consistent with CachingBuildEngine's shallow build mode. The class uses reference counting to efficiently keep track of those BuildEngineAction.

Constructors
Constructor and Description
`UnskippedBuildEngineActionTracker(RuleDepsCache ruleDepsCache, BuildRuleResolver ruleResolver)`

All Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`void`	`markRuleAsUsed(BuildEngineAction action, BuckEventBus eventBus)`
`void`	`registerTopLevelRule(BuildEngineAction action, BuckEventBus eventBus)`

public UnskippedBuildEngineActionTracker(RuleDepsCache ruleDepsCache,
                                         BuildRuleResolver ruleResolver)

public void registerTopLevelRule(BuildEngineAction action,
                                 BuckEventBus eventBus)

public void markRuleAsUsed(BuildEngineAction action,
                           BuckEventBus eventBus)

Class UnskippedBuildEngineActionTracker