Package org.apache.hadoop.hdfs.server.federation.router

Class RouterSafemodeService

java.lang.Object
org.apache.hadoop.service.AbstractService
org.apache.hadoop.hdfs.server.federation.router.PeriodicService
org.apache.hadoop.hdfs.server.federation.router.RouterSafemodeService
All Implemented Interfaces:
Closeable, AutoCloseable, org.apache.hadoop.service.Service
public class RouterSafemodeService extends PeriodicService
Service to periodically check if the StateStoreService cached information in the Router is up to date. This is for performance and removes the StateStoreService from the critical path in common operations.

  • Nested Class Summary

    Nested classes/interfaces inherited from interface org.apache.hadoop.service.Service

    org.apache.hadoop.service.Service.STATE

  • Constructor Summary

    Constructors
    Constructor
    Description
    RouterSafemodeService(Router router)
    Create a new Cache update service.

  • Method Summary

    Modifier and Type
    Method
    Description
    void
    periodicInvoke()
    Method that the service will run periodically.
    protected void
    serviceInit(org.apache.hadoop.conf.Configuration conf)
     

    Methods inherited from class org.apache.hadoop.hdfs.server.federation.router.PeriodicService

    getErrorCount, getIntervalMs, getLastUpdate, getRunCount, serviceStart, serviceStop, setIntervalMs, startPeriodic, stopPeriodic

    Methods inherited from class org.apache.hadoop.service.AbstractService

    close, getBlockers, getConfig, getFailureCause, getFailureState, getLifecycleHistory, getName, getServiceState, getStartTime, init, isInState, noteFailure, putBlocker, registerGlobalListener, registerServiceListener, removeBlocker, setConfig, start, stop, toString, unregisterGlobalListener, unregisterServiceListener, waitForServiceToStop

    Methods inherited from class java.lang.Object

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

  • Constructor Details

    • RouterSafemodeService

      public RouterSafemodeService(Router router)
      Create a new Cache update service.
      Parameters:
      router - Router containing the cache.

  • Method Details

    • serviceInit

      protected void serviceInit(org.apache.hadoop.conf.Configuration conf) throws Exception
      Overrides:
      serviceInit in class org.apache.hadoop.service.AbstractService
      Throws:
      Exception

    • periodicInvoke

      public void periodicInvoke()
      Description copied from class: PeriodicService
      Method that the service will run periodically.
      Specified by:
      periodicInvoke in class PeriodicService