Examples of org.apache.hadoop.hbase.ipc.HRegionInterface

org.apache.hadoop.hbase.ipc.HRegionInterface
Clients interact with HRegionServers using a handle to the HRegionInterface.
NOTE: if you change the interface, you must change the RPC version number in HBaseRPCProtocolVersion

   * when RS tries to change the state from OFFLINE to other states.
   */
  public RegionOpeningState sendRegionOpen(final ServerName server,
      HRegionInfo region, int versionOfOfflineNode)
  throws IOException {
    HRegionInterface hri = getServerConnection(server);
    if (hri == null) {
      LOG.warn("Attempting to send OPEN RPC to server " + server.toString() +
        " failed because no RPC connection found to this server");
      return RegionOpeningState.FAILED_OPENING;
    }
    return (versionOfOfflineNode == -1) ? hri.openRegion(region) : hri
        .openRegion(region, versionOfOfflineNode);
  }

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   * @param hri
   * @throws IOException
   */
  public void closeRegion(final ServerName sn, final HRegionInfo hri)
  throws IOException {
    HRegionInterface rs =
      this.connection.getHRegionConnection(sn.getHostname(), sn.getPort());
    // Close the region without updating zk state.
    rs.closeRegion(hri, false);
  }

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    }
  }


  private void flush(final ServerName sn, final HRegionInfo hri)
  throws IOException {
    HRegionInterface rs =
      this.connection.getHRegionConnection(sn.getHostname(), sn.getPort());
    rs.flushRegion(hri);
  }

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   * @param server server to open a region
   * @param regions regions to open
   */
  public void sendRegionOpen(ServerName server, List<HRegionInfo> regions)
  throws IOException {
    HRegionInterface hri = getServerConnection(server);
    if (hri == null) {
      LOG.warn("Attempting to send OPEN RPC to server " + server.toString() +
        " failed because no RPC connection found to this server");
      return;
    }
    hri.openRegions(regions);
  }

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  }


  private void compact(final ServerName sn, final HRegionInfo hri,
      final boolean major, final byte [] family)
  throws IOException {
    HRegionInterface rs =
      this.connection.getHRegionConnection(sn.getHostname(), sn.getPort());
    if (family != null) {
      try {
        rs.compactRegion(hri, major, family);
      } catch (IOException ioe) {
        String notFoundMsg = "java.lang.NoSuchMethodException: org.apache.hadoop.hbase.ipc.HRegionInterface."
          + "compactRegion(org.apache.hadoop.hbase.HRegionInfo, boolean, [B)";
        if (ioe.getMessage().contains(notFoundMsg)) {
          throw new IOException("per-column family compaction not supported on this version "
            + "of the HBase server.  You may still compact at the table or region level by "
            + "omitting the column family name.  Alternatively, you can upgrade the HBase server");
        }
        throw ioe;
      }
    } else {
      rs.compactRegion(hri, major);
    }
  }

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   * @throws IOException
   */
  public boolean sendRegionClose(ServerName server, HRegionInfo region,
    int versionOfClosingNode) throws IOException {
    if (server == null) throw new NullPointerException("Passed server is null");
    HRegionInterface hri = getServerConnection(server);
    if (hri == null) {
      throw new IOException("Attempting to send CLOSE RPC to server " +
        server.toString() + " for region " +
        region.getRegionNameAsString() +
        " failed because no RPC connection found to this server");
    }
    return hri.closeRegion(region, versionOfClosingNode);
  }

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   * @throws RetriesExhaustedException wrapping a ConnectException if failed
   * putting up proxy.
   */
  private HRegionInterface getServerConnection(final ServerName sn)
  throws IOException {
    HRegionInterface hri = this.serverConnections.get(sn);
    if (hri == null) {
      LOG.debug("New connection to " + sn.toString());
      hri = this.connection.getHRegionConnection(sn.getHostname(), sn.getPort());
      this.serverConnections.put(sn, hri);
    }

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    }
  }


  private void split(final ServerName sn, final HRegionInfo hri,
      byte[] splitPoint) throws IOException {
    HRegionInterface rs =
      this.connection.getHRegionConnection(sn.getHostname(), sn.getPort());
    rs.splitRegion(hri, splitPoint);
  }

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   */
  public synchronized void stopRegionServer(final String hostnamePort)
  throws IOException {
    String hostname = Addressing.parseHostname(hostnamePort);
    int port = Addressing.parsePort(hostnamePort);
    HRegionInterface rs =
      this.connection.getHRegionConnection(hostname, port);
    rs.stop("Called by admin client " + this.connection.toString());
  }

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   * @throws FailedLogCloseException
   */
 public synchronized  byte[][] rollHLogWriter(String serverName)
      throws IOException, FailedLogCloseException {
    ServerName sn = new ServerName(serverName);
    HRegionInterface rs = this.connection.getHRegionConnection(
        sn.getHostname(), sn.getPort());
    return rs.rollHLogWriter();
  }

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