Examples with Result org.apache.hadoop.hbase.client.Result used on opensource projects

Example 6 with Result

use of org.apache.hadoop.hbase.client.Result in project hbase by apache.

the class MetaTableAccessor method getSerialReplicationDaughterRegion.

/**
   * Get daughter region(s) for a region, only used in serial replication.
   * @param connection connection we're using
   * @param encodedName region's encoded name
   * @throws IOException
   */
public static String getSerialReplicationDaughterRegion(Connection connection, byte[] encodedName) throws IOException {
    Get get = new Get(encodedName);
    get.addColumn(HConstants.REPLICATION_META_FAMILY, daughterNameCq);
    Result result = get(getMetaHTable(connection), get);
    if (!result.isEmpty()) {
        Cell c = result.rawCells()[0];
        return Bytes.toString(c.getValueArray(), c.getValueOffset(), c.getValueLength());
    }
    return null;
}

Example 7 with Result

use of org.apache.hadoop.hbase.client.Result in project hbase by apache.

the class MetaTableAccessor method getRegionLocation.

/**
   * Returns the HRegionLocation from meta for the given region
   * @param connection connection we're using
   * @param regionInfo region information
   * @return HRegionLocation for the given region
   * @throws IOException
   */
public static HRegionLocation getRegionLocation(Connection connection, HRegionInfo regionInfo) throws IOException {
    byte[] row = getMetaKeyForRegion(regionInfo);
    Get get = new Get(row);
    get.addFamily(HConstants.CATALOG_FAMILY);
    Result r = get(getMetaHTable(connection), get);
    return getRegionLocation(r, regionInfo, regionInfo.getReplicaId());
}

Example 8 with Result

use of org.apache.hadoop.hbase.client.Result in project hbase by apache.

the class MetaTableAccessor method getClosestRegionInfo.

/**
   * @return Get closest metatable region row to passed <code>row</code>
   * @throws java.io.IOException
   */
@NonNull
public static HRegionInfo getClosestRegionInfo(Connection connection, @NonNull final TableName tableName, @NonNull final byte[] row) throws IOException {
    byte[] searchRow = HRegionInfo.createRegionName(tableName, row, HConstants.NINES, false);
    Scan scan = getMetaScan(connection, 1);
    scan.setReversed(true);
    scan.setStartRow(searchRow);
    try (ResultScanner resultScanner = getMetaHTable(connection).getScanner(scan)) {
        Result result = resultScanner.next();
        if (result == null) {
            throw new TableNotFoundException("Cannot find row in META " + " for table: " + tableName + ", row=" + Bytes.toStringBinary(row));
        }
        HRegionInfo regionInfo = getHRegionInfo(result);
        if (regionInfo == null) {
            throw new IOException("HRegionInfo was null or empty in Meta for " + tableName + ", row=" + Bytes.toStringBinary(row));
        }
        return regionInfo;
    }
}

Example 9 with Result

use of org.apache.hadoop.hbase.client.Result in project hbase by apache.

the class MetaTableAccessor method getAllBarriers.

/**
   * Get all barriers in all regions.
   * @return a map of barrier lists in all regions
   * @throws IOException
   */
public static Map<String, List<Long>> getAllBarriers(Connection connection) throws IOException {
    Map<String, List<Long>> map = new HashMap<>();
    Scan scan = new Scan();
    scan.addFamily(HConstants.REPLICATION_BARRIER_FAMILY);
    try (Table t = getMetaHTable(connection);
        ResultScanner scanner = t.getScanner(scan)) {
        Result result;
        while ((result = scanner.next()) != null) {
            String key = Bytes.toString(result.getRow());
            List<Long> list = new ArrayList<>(result.rawCells().length);
            for (Cell cell : result.rawCells()) {
                list.add(Bytes.toLong(cell.getQualifierArray(), cell.getQualifierOffset(), cell.getQualifierLength()));
            }
            map.put(key, list);
        }
    }
    return map;
}

Example 10 with Result

use of org.apache.hadoop.hbase.client.Result in project hbase by apache.

the class TestHelloHBase method testDeleteRow.

@Test
public void testDeleteRow() throws IOException {
    Admin admin = TEST_UTIL.getAdmin();
    admin.createNamespace(NamespaceDescriptor.create(HelloHBase.MY_NAMESPACE_NAME).build());
    Table table = TEST_UTIL.createTable(HelloHBase.MY_TABLE_NAME, HelloHBase.MY_COLUMN_FAMILY_NAME);
    table.put(new Put(HelloHBase.MY_ROW_ID).addColumn(HelloHBase.MY_COLUMN_FAMILY_NAME, HelloHBase.MY_FIRST_COLUMN_QUALIFIER, Bytes.toBytes("xyz")));
    HelloHBase.deleteRow(table);
    Result row = table.get(new Get(HelloHBase.MY_ROW_ID));
    assertEquals("#deleteRow failed to delete row.", true, row.isEmpty());
    TEST_UTIL.deleteTable(HelloHBase.MY_TABLE_NAME);
    admin.deleteNamespace(HelloHBase.MY_NAMESPACE_NAME);
}