| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.hadoop.hbase.mapreduce; |
| |
| import static org.apache.hadoop.hbase.security.visibility.VisibilityConstants.LABELS_TABLE_FAMILY; |
| import static org.apache.hadoop.hbase.security.visibility.VisibilityConstants.LABELS_TABLE_NAME; |
| import static org.apache.hadoop.hbase.security.visibility.VisibilityConstants.LABEL_QUALIFIER; |
| |
| import java.io.IOException; |
| import java.util.HashMap; |
| import java.util.List; |
| import java.util.Map; |
| |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.hbase.TableNotFoundException; |
| import org.apache.hadoop.hbase.Tag; |
| import org.apache.hadoop.hbase.classification.InterfaceAudience; |
| import org.apache.hadoop.hbase.client.Connection; |
| import org.apache.hadoop.hbase.client.ConnectionFactory; |
| import org.apache.hadoop.hbase.client.Result; |
| import org.apache.hadoop.hbase.client.ResultScanner; |
| import org.apache.hadoop.hbase.client.Scan; |
| import org.apache.hadoop.hbase.client.Table; |
| import org.apache.hadoop.hbase.security.visibility.Authorizations; |
| import org.apache.hadoop.hbase.security.visibility.VisibilityConstants; |
| import org.apache.hadoop.hbase.security.visibility.VisibilityLabelOrdinalProvider; |
| import org.apache.hadoop.hbase.security.visibility.VisibilityUtils; |
| import org.apache.hadoop.hbase.util.Bytes; |
| |
| /** |
| * This implementation creates tags by expanding expression using label ordinal. Labels will be |
| * serialized in sorted order of it's ordinal. |
| */ |
| @InterfaceAudience.Private |
| public class DefaultVisibilityExpressionResolver implements VisibilityExpressionResolver { |
| private static final Log LOG = LogFactory.getLog(DefaultVisibilityExpressionResolver.class); |
| |
| private Configuration conf; |
| private final Map<String, Integer> labels = new HashMap<String, Integer>(); |
| |
| @Override |
| public Configuration getConf() { |
| return this.conf; |
| } |
| |
| @Override |
| public void setConf(Configuration conf) { |
| this.conf = conf; |
| } |
| |
| @Override |
| public void init() { |
| // Reading all the labels and ordinal. |
| // This scan should be done by user with global_admin privileges.. Ensure that it works |
| Table labelsTable = null; |
| Connection connection = null; |
| try { |
| connection = ConnectionFactory.createConnection(conf); |
| try { |
| labelsTable = connection.getTable(LABELS_TABLE_NAME); |
| } catch (IOException e) { |
| LOG.error("Error opening 'labels' table", e); |
| return; |
| } |
| Scan scan = new Scan(); |
| scan.setAuthorizations(new Authorizations(VisibilityUtils.SYSTEM_LABEL)); |
| scan.addColumn(LABELS_TABLE_FAMILY, LABEL_QUALIFIER); |
| ResultScanner scanner = null; |
| try { |
| scanner = labelsTable.getScanner(scan); |
| Result next = null; |
| while ((next = scanner.next()) != null) { |
| byte[] row = next.getRow(); |
| byte[] value = next.getValue(LABELS_TABLE_FAMILY, LABEL_QUALIFIER); |
| labels.put(Bytes.toString(value), Bytes.toInt(row)); |
| } |
| } catch (TableNotFoundException e) { |
| // Table not found. So just return |
| return; |
| } catch (IOException e) { |
| LOG.error("Error scanning 'labels' table", e); |
| } finally { |
| if (scanner != null) scanner.close(); |
| } |
| } catch (IOException ioe) { |
| LOG.error("Failed reading 'labels' tags", ioe); |
| return; |
| } finally { |
| if (labelsTable != null) { |
| try { |
| labelsTable.close(); |
| } catch (IOException ioe) { |
| LOG.warn("Error closing 'labels' table", ioe); |
| } |
| } |
| if (connection != null) |
| try { |
| connection.close(); |
| } catch (IOException ioe) { |
| LOG.warn("Failed close of temporary connection", ioe); |
| } |
| } |
| } |
| |
| @Override |
| public List<Tag> createVisibilityExpTags(String visExpression) throws IOException { |
| VisibilityLabelOrdinalProvider provider = new VisibilityLabelOrdinalProvider() { |
| @Override |
| public int getLabelOrdinal(String label) { |
| Integer ordinal = null; |
| ordinal = labels.get(label); |
| if (ordinal != null) { |
| return ordinal.intValue(); |
| } |
| return VisibilityConstants.NON_EXIST_LABEL_ORDINAL; |
| } |
| |
| @Override |
| public String getLabel(int ordinal) { |
| // Unused |
| throw new UnsupportedOperationException( |
| "getLabel should not be used in VisibilityExpressionResolver"); |
| } |
| }; |
| return VisibilityUtils.createVisibilityExpTags(visExpression, true, false, null, provider); |
| } |
| } |