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

org.apache.hadoop.hbase.client.HTablePool
A simple pool of HTable instances. Each HTablePool acts as a pool for all tables. To use, instantiate an HTablePool and use {@link #getTable(String)} to get an HTable from the pool.This method is not needed anymore, clients should call HTableInterface.close() rather than returning the tables to the pool Once you are done with it, close your instance of {@link HTableInterface}by calling {@link HTableInterface#close()} rather than returning the tablesto the pool with (deprecated) {@link #putTable(HTableInterface)}.
A pool can be created with a maxSize which defines the most HTable references that will ever be retained for each table. Otherwise the default is {@link Integer#MAX_VALUE}.
Pool will manage its own connections to the cluster. See {@link HConnectionManager}. @deprecated Use {@link HConnection#getTable(String)} instead.

    this.tableName = table;
  }


  private HTableDescriptor getTableSchema() throws IOException,
      TableNotFoundException {
    HTablePool pool = servlet.getTablePool();
    HTableInterface table = pool.getTable(tableName);
    try {
      return table.getTableDescriptor();
    } finally {
      pool.putTable(table);
    }
  }

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    }
  }


  Response update(final CellSetModel model, final boolean replace) {
    servlet.getMetrics().incrementRequests(1);
    HTablePool pool = servlet.getTablePool();
    HTableInterface table = null;
    try {
      List<RowModel> rows = model.getRows();
      table = pool.getTable(tableName);
      ((HTable)table).setAutoFlush(false);
      for (RowModel row: rows) {
        byte[] key = row.getKey();
        Put put = new Put(key);
        for (CellModel cell: row.getCells()) {
          byte [][] parts = KeyValue.parseColumn(cell.getColumn());
          if (parts.length == 2 && parts[1].length > 0) {
            put.add(parts[0], parts[1], cell.getTimestamp(), cell.getValue());
          } else {
            put.add(parts[0], null, cell.getTimestamp(), cell.getValue());
          }
        }
        table.put(put);
        if (LOG.isDebugEnabled()) {
          LOG.debug("PUT " + put.toString());
        }
      }
      ((HTable)table).setAutoFlush(true);
      table.flushCommits();
      ResponseBuilder response = Response.ok();
      return response.build();
    } catch (IOException e) {
      throw new WebApplicationException(e,
                  Response.Status.SERVICE_UNAVAILABLE);
    } finally {
      if (table != null) {
        pool.putTable(table);
      }
    }
  }

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  // This currently supports only update of one row at a time.
  Response updateBinary(final byte[] message, final HttpHeaders headers,
      final boolean replace) {
    servlet.getMetrics().incrementRequests(1);
    HTablePool pool = servlet.getTablePool();
    HTableInterface table = null;    
    try {
      byte[] row = rowspec.getRow();
      byte[][] columns = rowspec.getColumns();
      byte[] column = null;
      if (columns != null) {
        column = columns[0];
      }
      long timestamp = HConstants.LATEST_TIMESTAMP;
      List<String> vals = headers.getRequestHeader("X-Row");
      if (vals != null && !vals.isEmpty()) {
        row = Bytes.toBytes(vals.get(0));
      }
      vals = headers.getRequestHeader("X-Column");
      if (vals != null && !vals.isEmpty()) {
        column = Bytes.toBytes(vals.get(0));
      }
      vals = headers.getRequestHeader("X-Timestamp");
      if (vals != null && !vals.isEmpty()) {
        timestamp = Long.valueOf(vals.get(0));
      }
      if (column == null) {
        throw new WebApplicationException(Response.Status.BAD_REQUEST);
      }
      Put put = new Put(row);
      byte parts[][] = KeyValue.parseColumn(column);
      if (parts.length == 2 && parts[1].length > 0) {
        put.add(parts[0], parts[1], timestamp, message);
      } else {
        put.add(parts[0], null, timestamp, message);
      }
      table = pool.getTable(tableName);
      table.put(put);
      if (LOG.isDebugEnabled()) {
        LOG.debug("PUT " + put.toString());
      }
      return Response.ok().build();
    } catch (IOException e) {
      throw new WebApplicationException(e,
                  Response.Status.SERVICE_UNAVAILABLE);
    } finally {
      if (table != null) {
        pool.putTable(table);
      }
    }
  }

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        } else {
          delete.deleteFamily(split[0]);
        }
      }
    }
    HTablePool pool = servlet.getTablePool();
    HTableInterface table = null;
    try {
      table = pool.getTable(tableName);
      table.delete(delete);
      if (LOG.isDebugEnabled()) {
        LOG.debug("DELETE " + delete.toString());
      }
    } catch (IOException e) {
      throw new WebApplicationException(e, 
                  Response.Status.SERVICE_UNAVAILABLE);
    } finally {
      if (table != null) {
        pool.putTable(table);
      }
    }
    return Response.ok().build();
  }

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   * Constructor
   * @throws IOException
   */
  public RESTServlet() throws IOException {
    this.conf = HBaseConfiguration.create();
    this.pool = new HTablePool(conf, 10);
  }

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    this.tableName = table;
  }


  private Map<HRegionInfo,HServerAddress> getTableRegions()
      throws IOException {
    HTablePool pool = servlet.getTablePool();
    HTableInterface table = pool.getTable(tableName);
    try {
      return ((HTable)table).getRegionsInfo();
    } finally {
      pool.putTable(table);
    }
  }

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   * @throws IOException thrown when HDFS goes bad or bad file name
   */
  public ReplicationSink(Configuration conf, AtomicBoolean stopper)
      throws IOException {
    this.conf = conf;
    this.pool = new HTablePool(this.conf,
        conf.getInt("replication.sink.htablepool.capacity", 10));
    this.stop = stopper;
    this.metrics = new ReplicationSinkMetrics();
  }

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    @Override
    protected void doStart() throws Exception {
        if (configuration == null) {
            configuration = HBaseConfiguration.create();
        }
        tablePool = new HTablePool(configuration, poolMaxSize);
    }

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  public HBaseDataModel(String zkConnect, String tableName) throws IOException {
    log.info("Using HBase table {}", tableName);
    Configuration conf = HBaseConfiguration.create();
    conf.set("hbase.zookeeper.quorum", zkConnect);
    HTableFactory tableFactory = new HTableFactory();
    this.pool = new HTablePool(conf, 8, tableFactory);
    this.tableName = tableName;


    bootstrap(conf);
    // Warm the cache
    refresh(null);

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  private static long now() {
    return System.nanoTime();
  }


  ThriftHBaseServiceHandler(Configuration conf) {
    htablePool = new HTablePool(conf, Integer.MAX_VALUE);
  }

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