Examples of HConnection

org.apache.hadoop.hbase.HConnection
org.apache.hadoop.hbase.client.HConnection
A cluster connection. Knows how to find the master, locate regions out on the cluster, keeps a cache of locations and then knows how to re-calibrate after they move. {@link HConnectionManager} manages instances of this class. This is NOT a connection to aparticular server but to all servers in the cluster. Individual connections are managed at a lower level.
HConnections are used by {@link HTable} mostly but also by{@link HBaseAdmin}, and {@link CatalogTracker}. HConnection instances can be shared. Sharing is usually what you want because rather than each HConnection instance having to do its own discovery of regions out on the cluster, instead, all clients get to share the one cache of locations. {@link HConnectionManager} does thesharing for you if you go by it getting connections. Sharing makes cleanup of HConnections awkward. See {@link HConnectionManager} for cleanup discussion. @see HConnectionManager
org.apache.hadoop.hbase.hbql.client.HConnection

Examples of org.apache.hadoop.hbase.client.HConnection

      }
    }
  }


  private static String getPeerQuorumAddress(final Configuration conf) throws IOException {
    HConnection conn = HConnectionManager.getConnection(conf);
    try {
      ReplicationZookeeper zk = new ReplicationZookeeper(conn, conf,
          conn.getZooKeeperWatcher());


      ReplicationPeer peer = zk.getPeer(peerId);
      if (peer == null) {
        throw new IOException("Couldn't get peer conf!");
      }


      Configuration peerConf = peer.getConfiguration();
      return ZKUtil.getZooKeeperClusterKey(peerConf);
    } catch (KeeperException e) {
      throw new IOException("Got a ZK exception", e);
    } finally {
      conn.close();
    }
  }

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Examples of org.apache.hadoop.hbase.client.HConnection

   * @throws TableNotFoundException if table does not yet exist
   */
  public void doBulkLoad(Path hfofDir, final HTable table)
    throws TableNotFoundException, IOException
  {
    final HConnection conn = table.getConnection();


    if (!conn.isTableAvailable(table.getTableName())) {
      throw new TableNotFoundException("Table " +
          Bytes.toStringBinary(table.getTableName()) +
          "is not currently available.");
    }

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Examples of org.apache.hadoop.hbase.hbql.client.HConnection


        final byte[] family = Bytes.toBytes("family1");
        final byte[] author = Bytes.toBytes("author");
        final byte[] title = Bytes.toBytes("title");


        HConnection connection = HConnectionManager.newConnection();


        connection.execute("CREATE TEMP MAPPING testobjects alias testobjects2"
                           + "("
                           + "keyval key, "
                           + "family1 ("
                           + "  author string alias author, "
                           + "  title string  alias title"
                           + "))");


        HMapping mapping = connection.getMapping("testobjects");


        final RecordFilter filter = ((TableMapping)mapping)
                .newRecordFilter("title LIKE '.*3.*' OR family1:author LIKE '.*4.*'");


        Scan scan = new Scan();

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