Field Detail

• LOG

  private static final org.apache.commons.logging.Log LOG

• META_REPLICA_ID_DELIMITER

  protected static final char META_REPLICA_ID_DELIMITER

  The delimiter for meta columns for replicaIds > 0

  See Also:

  Constant Field Values

• metaRegion

  private volatile Region metaRegion

• multiHConnection

  private MultiHConnection multiHConnection

• initialized

  private volatile boolean initialized

• noPersistence

  private final boolean noPersistence

• server

  private final Server server

Constructor Detail

• RegionStateStore

  RegionStateStore(Server server)

Method Detail

• getRegionServer

  static ServerName getRegionServer(Result r,
                           int replicaId)

  Returns the ServerName from catalog table Result where the region is transitioning. It should be the same as HRegionInfo.getServerName(Result) if the server is at OPEN state.

  Parameters:

  r - Result to pull the transitioning server name from

  Returns:

  A ServerName instance or HRegionInfo.getServerName(Result) if necessary fields not found or empty.

• getServerNameColumn

  private static byte[] getServerNameColumn(int replicaId)

• getRegionState

  static RegionState.State getRegionState(Result r,
                                 int replicaId)

  Pull the region state from a catalog table Result.

  Parameters:

  r - Result to pull the region state from

  Returns:

  the region state, or OPEN if there's no value written.

• getStateColumn

  private static byte[] getStateColumn(int replicaId)

• shouldPersistStateChange

  private boolean shouldPersistStateChange(HRegionInfo hri,
                                 RegionState state,
                                 RegionState oldState)

  Check if we should persist a state change in meta. Generally it's better to persist all state changes. However, we should not do that if the region is not in meta at all. Based on the state and the previous state, we can identify if a user region has an entry in meta. For example, merged regions are deleted from meta; New merging parents, or splitting daughters are not created in meta yet.

• start

  void start()
       throws IOException

  Throws:

  IOException

• stop

  void stop()

• updateRegionState

  void updateRegionState(long openSeqNum,
                       RegionState newState,
                       RegionState oldState)

• splitRegion

  void splitRegion(HRegionInfo p,
                 HRegionInfo a,
                 HRegionInfo b,
                 ServerName sn,
                 int regionReplication)
             throws IOException

  Throws:

  IOException

• mergeRegions

  void mergeRegions(HRegionInfo p,
                  HRegionInfo a,
                  HRegionInfo b,
                  ServerName sn,
                  int regionReplication)
              throws IOException

  Throws:

  IOException