| /* |
| * 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.rest; |
| |
| import java.io.IOException; |
| import java.util.ArrayList; |
| import java.util.Collection; |
| import java.util.List; |
| import org.apache.hadoop.hbase.CellUtil; |
| import org.apache.hadoop.hbase.DoNotRetryIOException; |
| import org.apache.hadoop.hbase.client.Get; |
| import org.apache.hadoop.hbase.client.Result; |
| import org.apache.hadoop.hbase.client.Table; |
| import org.apache.hadoop.hbase.filter.Filter; |
| import org.apache.hadoop.hbase.security.AccessDeniedException; |
| import org.apache.hadoop.util.StringUtils; |
| import org.apache.yetus.audience.InterfaceAudience; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| @InterfaceAudience.Private |
| public class MultiRowResultReader { |
| |
| private static final Logger LOG = LoggerFactory.getLogger(MultiRowResultReader.class); |
| |
| private Result[] results; |
| |
| public MultiRowResultReader(final String tableName, final Collection<RowSpec> rowspecs, |
| final Filter filter, final boolean cacheBlocks) throws IOException { |
| try (Table table = RESTServlet.getInstance().getTable(tableName)) { |
| List<Get> gets = new ArrayList<>(rowspecs.size()); |
| for (RowSpec rowspec : rowspecs) { |
| Get get = new Get(rowspec.getRow()); |
| if (rowspec.hasColumns()) { |
| for (byte[] col : rowspec.getColumns()) { |
| byte[][] split = CellUtil.parseColumn(col); |
| if (split.length == 1) { |
| get.addFamily(split[0]); |
| } else if (split.length == 2) { |
| get.addColumn(split[0], split[1]); |
| } else { |
| throw new IllegalArgumentException("Invalid column specifier."); |
| } |
| } |
| } |
| get.setTimeRange(rowspec.getStartTime(), rowspec.getEndTime()); |
| get.readVersions(rowspec.getMaxVersions()); |
| if (filter != null) { |
| get.setFilter(filter); |
| } |
| get.setCacheBlocks(cacheBlocks); |
| gets.add(get); |
| } |
| results = table.get(gets); |
| } catch (DoNotRetryIOException e) { |
| // TODO this is copied from RowResultGenerator, but we probably shouldn't swallow |
| // every type of exception but AccessDeniedException |
| LOG.warn(StringUtils.stringifyException(e)); |
| // Lets get the exception rethrown to get a more meaningful error message than 404 |
| if (e instanceof AccessDeniedException) { |
| throw e; |
| } |
| } |
| } |
| |
| public Result[] getResults() { |
| return results; |
| } |
| |
| } |