StoreGraveyardCleanupService (venice API)

java.lang.Object
- com.linkedin.venice.service.AbstractVeniceService
- - com.linkedin.venice.controller.StoreGraveyardCleanupService

All Implemented Interfaces:

java.io.Closeable, java.lang.AutoCloseable
```
public class StoreGraveyardCleanupService
extends AbstractVeniceService
```
This service is in charge of removing stores under /venice//StoreGraveyard zk path. A store is removable from graveyard when the following resources do not exist: 1. Kafka topics, including user store and its system stores version, streaming reprocessing and real-time topics. 2. Helix resources, including resources created by Helix for user store and its system stores versions. 3. Offline pushes, including OfflinePushes zk nodes created by Venice for user store and its system stores versions. The service runs in parent controller only. Parent controller find removable stores and calls child controllers. Each child controller checks if the store can be removed from graveyard in the child colo. If so, remove it and respond OK. Otherwise, respond with error. If all child controllers respond OK, parent controller will remove the store from graveyard in parent colo.

- Nested Class Summary
  - Nested classes/interfaces inherited from class com.linkedin.venice.service.AbstractVeniceService
    AbstractVeniceService.ServiceState
- Field Summary
  - Fields inherited from class com.linkedin.venice.service.AbstractVeniceService
    logger, serviceState
- Constructor Summary
  
  Constructors
  Constructor Description
  
  StoreGraveyardCleanupService(VeniceParentHelixAdmin admin, VeniceControllerMultiClusterConfig multiClusterConfig)
- Method Summary
  
  All Methods Instance Methods Concrete Methods
  Modifier and Type Method Description
  
  boolean startInner()
  
  void stopInner()
  - Methods inherited from class com.linkedin.venice.service.AbstractVeniceService
    close, getName, isRunning, start, stop
  - Methods inherited from class java.lang.Object
    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - StoreGraveyardCleanupService
```
public StoreGraveyardCleanupService(VeniceParentHelixAdmin admin,
                                    VeniceControllerMultiClusterConfig multiClusterConfig)
```
- Method Detail
  - startInner
```
public boolean startInner()
                   throws java.lang.Exception
```
    Specified by:
    
    startInner in class AbstractVeniceService
    
    Returns:
    
    true if the service is completely started, false if it is still starting asynchronously (in this case, it is the implementer's responsibility to set AbstractVeniceService.serviceState to AbstractVeniceService.ServiceState.STARTED upon completion of the async work).
    
    Throws:
    
    java.lang.Exception
  - stopInner
```
public void stopInner()
               throws java.lang.Exception
```
    Specified by:
    
    stopInner in class AbstractVeniceService
    
    Throws:
    
    java.lang.Exception