Examples of org.apache.hadoop.hbase.RegionLocations

org.apache.hadoop.hbase.RegionLocations
Container for holding a list of {@link HRegionLocation}'s that correspond to the same range. The list is indexed by the replicaId. This is an immutable list, however mutation operations are provided which returns a new List via copy-on-write (assuming small number of locations)

      if (!this.cachedServers.contains(serverName)) {
        return;
      }
      for (ConcurrentMap<byte[], RegionLocations> tableLocations : cachedRegionLocations.values()){
        for (Entry<byte[], RegionLocations> e : tableLocations.entrySet()) {
          RegionLocations regionLocations = e.getValue();
          if (regionLocations != null) {
            RegionLocations updatedLocations = regionLocations.removeByServer(serverName);
            if (updatedLocations != regionLocations) {
              if (updatedLocations.isEmpty()) {
                deletedSomething |= tableLocations.remove(e.getKey(), regionLocations);
              } else {
                deletedSomething |= tableLocations.replace(e.getKey(), regionLocations, updatedLocations);
              }
            }

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   */
  public void clearCache(final TableName tableName, final byte [] row, int replicaId) {
    ConcurrentMap<byte[], RegionLocations> tableLocations = getTableLocations(tableName);


    boolean removed = false;
    RegionLocations regionLocations = getCachedLocation(tableName, row);
    if (regionLocations != null) {
      HRegionLocation toBeRemoved = regionLocations.getRegionLocation(replicaId);
      RegionLocations updatedLocations = regionLocations.remove(replicaId);
      if (updatedLocations != regionLocations) {
        byte[] startKey = regionLocations.getRegionLocation().getRegionInfo().getStartKey();
        if (updatedLocations.isEmpty()) {
          removed = tableLocations.remove(startKey, regionLocations);
        } else {
          removed = tableLocations.replace(startKey, regionLocations, updatedLocations);
        }
      }

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   * @param row
   */
  public void clearCache(final TableName tableName, final byte [] row) {
    ConcurrentMap<byte[], RegionLocations> tableLocations = getTableLocations(tableName);


    RegionLocations regionLocations = getCachedLocation(tableName, row);
    if (regionLocations != null) {
      byte[] startKey = regionLocations.getRegionLocation().getRegionInfo().getStartKey();
      boolean removed = tableLocations.remove(startKey, regionLocations);
      if (removed && LOG.isTraceEnabled()) {
        LOG.trace("Removed " + regionLocations + " from cache");
      }
    }

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   * Delete a cached location for a table, row and server
   */
  public void clearCache(final TableName tableName, final byte [] row, ServerName serverName) {
    ConcurrentMap<byte[], RegionLocations> tableLocations = getTableLocations(tableName);


    RegionLocations regionLocations = getCachedLocation(tableName, row);
    if (regionLocations != null) {
      RegionLocations updatedLocations = regionLocations.removeByServer(serverName);
      if (updatedLocations != regionLocations) {
        byte[] startKey = regionLocations.getRegionLocation().getRegionInfo().getStartKey();
        boolean removed = false;
        if (updatedLocations.isEmpty()) {
          removed = tableLocations.remove(startKey, regionLocations);
        } else {
          removed = tableLocations.replace(startKey, regionLocations, updatedLocations);
        }
        if (removed && LOG.isTraceEnabled()) {

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   * Deletes the cached location of the region if necessary, based on some error from source.
   * @param hri The region in question.
   */
  public void clearCache(HRegionInfo hri) {
    ConcurrentMap<byte[], RegionLocations> tableLocations = getTableLocations(hri.getTable());
    RegionLocations regionLocations = tableLocations.get(hri.getStartKey());
    if (regionLocations != null) {
      HRegionLocation oldLocation = regionLocations.getRegionLocation(hri.getReplicaId());
      if (oldLocation == null) return;
      RegionLocations updatedLocations = regionLocations.remove(oldLocation);
      boolean removed = false;
      if (updatedLocations != regionLocations) {
        if (updatedLocations.isEmpty()) {
          removed = tableLocations.remove(hri.getStartKey(), regionLocations);
        } else {
          removed = tableLocations.replace(hri.getStartKey(), regionLocations, updatedLocations);
        }
        if (removed && LOG.isTraceEnabled()) {

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    if (location == null) {
      return;
    }
    TableName tableName = location.getRegionInfo().getTable();
    ConcurrentMap<byte[], RegionLocations> tableLocations = getTableLocations(tableName);
    RegionLocations regionLocations = tableLocations.get(location.getRegionInfo().getStartKey());
    if (regionLocations != null) {
      RegionLocations updatedLocations = regionLocations.remove(location);
      boolean removed = false;
      if (updatedLocations != regionLocations) {
        if (updatedLocations.isEmpty()) {
          removed = tableLocations.remove(location.getRegionInfo().getStartKey(), regionLocations);
        } else {
          removed = tableLocations.replace(location.getRegionInfo().getStartKey(), regionLocations, updatedLocations);
        }
        if (removed && LOG.isTraceEnabled()) {

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        // Wait for new table to come on-line
        final AtomicInteger actualRegCount = new AtomicInteger(0);
        MetaScannerVisitor visitor = new MetaScannerVisitorBase() {
          @Override
          public boolean processRow(Result rowResult) throws IOException {
            RegionLocations list = MetaTableAccessor.getRegionLocations(rowResult);
            if (list == null) {
              LOG.warn("No serialized HRegionInfo in " + rowResult);
              return true;
            }
            HRegionLocation l = list.getRegionLocation();
            if (l == null) {
              return true;
            }
            if (!l.getRegionInfo().getTable().equals(desc.getTableName())) {
              return false;
            }
            if (l.getRegionInfo().isOffline() || l.getRegionInfo().isSplit()) return true;
            HRegionLocation[] locations = list.getRegionLocations();
            for (HRegionLocation location : locations) {
              if (location == null) continue;
              ServerName serverName = location.getServerName();
              // Make sure that regions are assigned to server
              if (serverName != null && serverName.getHostAndPort() != null) {

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        LOG.trace("Looked up meta region location, connection=" + this +
          "; serverName=" + ((servername == null) ? "null" : servername));
      }
      if (servername == null) return null;
      HRegionLocation loc = new HRegionLocation(HRegionInfo.FIRST_META_REGIONINFO, servername, 0);
      return new RegionLocations(new HRegionLocation[] {loc});
    } catch (InterruptedException e) {
      Thread.currentThread().interrupt();
      return null;
    } finally {
      zkw.close();

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    openRegion(hriSecondary);
    ClusterConnection hc = (ClusterConnection) HTU.getHBaseAdmin().getConnection();


    try {
      hc.clearRegionCache();
      RegionLocations rl = hc.locateRegion(table.getName(), b1, false, false);
      Assert.assertEquals(2, rl.size());


      rl = hc.locateRegion(table.getName(), b1, true, false);
      Assert.assertEquals(2, rl.size());


      hc.clearRegionCache();
      rl = hc.locateRegion(table.getName(), b1, true, false);
      Assert.assertEquals(2, rl.size());


      rl = hc.locateRegion(table.getName(), b1, false, false);
      Assert.assertEquals(2, rl.size());
    } finally {
      closeRegion(hriSecondary);
    }
  }

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      thenReturn(loc);
    Mockito.when(c.locateRegion((TableName) Mockito.any(), (byte[]) Mockito.any())).
      thenReturn(loc);
    Mockito.when(c.locateRegion((TableName) Mockito.any(), (byte[]) Mockito.any(),
        Mockito.anyBoolean(), Mockito.anyBoolean(),  Mockito.anyInt()))
        .thenReturn(new RegionLocations(loc));
    if (admin != null) {
      // If a call to getAdmin, return this implementation.
      Mockito.when(c.getAdmin(Mockito.any(ServerName.class))).
        thenReturn(admin);
    }

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