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

org.apache.hadoop.hbase.client.HBaseAdmin
Provides an interface to manage HBase database table metadata + general administrative functions. Use HBaseAdmin to create, drop, list, enable and disable tables. Use it also to add and drop table column families.
See {@link HTable} to add, update, and delete data from an individual table.
Currently HBaseAdmin instances are not expected to be long-lived. For example, an HBaseAdmin instance will not ride over a Master restart.

      hcd.setMaxVersions(1);
      hcd.setBlockCacheEnabled(true);
      ht.addFamily(hcd);
      
      log.info("Connecting to hbase...");
      HBaseAdmin hba = new HBaseAdmin(hc);
      log.info("Creating Table {}", output);
      
      if (hba.tableExists(output)) {
        hba.disableTable(output);
        hba.deleteTable(output);
        hba.majorCompact(".META.");
      }
      hba.createTable(ht);
      conf.set("output.table", output);
    }
    conf.set("bayes.parameters", params.toString());
    
    client.setConf(conf);

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  /**
   * Used only by test method
   * @param conf
   */
  static void createHbaseAdmin(Configuration conf) throws IOException {
    hbaseAdmin = new HBaseAdmin(conf);
  }

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    // Set it back to replace invalid timestamp (non-numeric) with current
    // system time
    conf.setLong(TIMESTAMP_CONF_KEY, timstamp); 
    
    hbaseAdmin = new HBaseAdmin(conf);
    Job job = createSubmittableJob(conf, otherArgs);
    System.exit(job.waitForCompletion(true) ? 0 : 1);
  }

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  @Test
  public void testRemovesRegionDirOnArchive() throws Exception {
    byte[] TABLE_NAME = Bytes.toBytes("testRemovesRegionDirOnArchive");
    UTIL.createTable(TABLE_NAME, TEST_FAM);


    final HBaseAdmin admin = UTIL.getHBaseAdmin();


    // get the current store files for the region
    List<HRegion> servingRegions = UTIL.getHBaseCluster().getRegions(TABLE_NAME);
    // make sure we only have 1 region serving this table
    assertEquals(1, servingRegions.size());
    HRegion region = servingRegions.get(0);


    // and load the table
    UTIL.loadRegion(region, TEST_FAM);


    // shutdown the table so we can manipulate the files
    admin.disableTable(TABLE_NAME);


    FileSystem fs = UTIL.getTestFileSystem();


    // now attempt to depose the region
    Path regionDir = HRegion.getRegionDir(region.getTableDir().getParent(), region.getRegionInfo());

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      this(HBaseConfiguration.create());
    }


    protected HBaseHandler(final Configuration c) throws IOException {
      this.conf = c;
      admin = new HBaseAdmin(conf);
      scannerMap = new HashMap<Integer, ResultScannerWrapper>();
      this.coalescer = new IncrementCoalescer(this);
    }

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        RowModel.class);
    marshaller = context.createMarshaller();
    unmarshaller = context.createUnmarshaller();
    client = new Client(new Cluster().add("localhost", 
      REST_TEST_UTIL.getServletPort()));
    HBaseAdmin admin = TEST_UTIL.getHBaseAdmin();
    if (admin.tableExists(TABLE)) {
      return;
    }
    HTableDescriptor htd = new HTableDescriptor(TABLE);
    htd.addFamily(new HColumnDescriptor(CFA));
    htd.addFamily(new HColumnDescriptor(CFB));
    admin.createTable(htd);
  }

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    }
    // flush cache of regions
    HConnection conn = table.getConnection();
    conn.clearRegionCache();
    // assign all the new regions IF table is enabled.
    HBaseAdmin admin = getHBaseAdmin();
    if (admin.isTableEnabled(table.getTableName())) {
      for(HRegionInfo hri : newRegions) {
        admin.assign(hri.getRegionName());
      }
    }


    meta.close();

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   * @throws IOException
   */
  public synchronized HBaseAdmin getHBaseAdmin()
  throws IOException {
    if (hbaseAdmin == null){
      hbaseAdmin = new HBaseAdmin(new Configuration(getConfiguration()));
    }
    return hbaseAdmin;
  }

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    if (!desc.hasFamily(hcd.getName())) {
      desc.addFamily(hcd);
    }


    int totalNumberOfRegions = 0;
    HBaseAdmin admin = new HBaseAdmin(conf);
    try {
      // create a table a pre-splits regions.
      // The number of splits is set as:
      //    region servers * regions per region server).
      int numberOfServers = admin.getClusterStatus().getServers().size();
      if (numberOfServers == 0) {
        throw new IllegalStateException("No live regionservers");
      }


      totalNumberOfRegions = numberOfServers * DEFAULT_REGIONS_PER_SERVER;
      LOG.info("Number of live regionservers: " + numberOfServers + ", " +
          "pre-splitting table into " + totalNumberOfRegions + " regions " +
          "(default regions per server: " + DEFAULT_REGIONS_PER_SERVER + ")");


      byte[][] splits = new RegionSplitter.HexStringSplit().split(
          totalNumberOfRegions);


      admin.createTable(desc, splits);
      admin.close();
    } catch (MasterNotRunningException e) {
      LOG.error("Master not running", e);
      throw new IOException(e);
    } catch (TableExistsException e) {
      LOG.warn("Table " + Bytes.toStringBinary(desc.getName()) +
          " already exists, continuing");
    } finally {
      admin.close();
    }
    return totalNumberOfRegions;
  }

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  public static void setUpBeforeClass() throws Exception {
    TEST_UTIL.startMiniCluster();
    REST_TEST_UTIL.startServletContainer(TEST_UTIL.getConfiguration());
    client = new Client(new Cluster().add("localhost",
      REST_TEST_UTIL.getServletPort()));
    HBaseAdmin admin = TEST_UTIL.getHBaseAdmin();
    if (admin.tableExists(TABLE)) {
      return;
    }
    HTableDescriptor htd = new HTableDescriptor(TABLE);
    htd.addFamily(new HColumnDescriptor(CFA));
    admin.createTable(htd);
  }

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