001/*
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 *     http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing, software
013 * distributed under the License is distributed on an "AS IS" BASIS,
014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015 * See the License for the specific language governing permissions and
016 * limitations under the License.
017 */
018package org.apache.hadoop.hbase.rest;
019
020import java.io.IOException;
021import org.apache.hadoop.hbase.Cell;
022import org.apache.hadoop.hbase.CellUtil;
023import org.apache.hadoop.hbase.rest.model.CellModel;
024import org.apache.hadoop.hbase.rest.model.CellSetModel;
025import org.apache.hadoop.hbase.rest.model.RowModel;
026import org.apache.hadoop.hbase.util.Bytes;
027import org.apache.yetus.audience.InterfaceAudience;
028import org.slf4j.Logger;
029import org.slf4j.LoggerFactory;
030
031import org.apache.hbase.thirdparty.javax.ws.rs.GET;
032import org.apache.hbase.thirdparty.javax.ws.rs.Produces;
033import org.apache.hbase.thirdparty.javax.ws.rs.core.Context;
034import org.apache.hbase.thirdparty.javax.ws.rs.core.MultivaluedMap;
035import org.apache.hbase.thirdparty.javax.ws.rs.core.Response;
036import org.apache.hbase.thirdparty.javax.ws.rs.core.UriInfo;
037
038@InterfaceAudience.Private
039public class MultiRowResource extends ResourceBase implements Constants {
040  private static final Logger LOG = LoggerFactory.getLogger(MultiRowResource.class);
041
042  TableResource tableResource;
043  Integer versions = null;
044  String[] columns = null;
045
046  /**
047   * Constructor nn * @throws java.io.IOException
048   */
049  public MultiRowResource(TableResource tableResource, String versions, String columnsStr)
050    throws IOException {
051    super();
052    this.tableResource = tableResource;
053
054    if (columnsStr != null && !columnsStr.equals("")) {
055      this.columns = columnsStr.split(",");
056    }
057
058    if (versions != null) {
059      this.versions = Integer.valueOf(versions);
060
061    }
062  }
063
064  @GET
065  @Produces({ MIMETYPE_XML, MIMETYPE_JSON, MIMETYPE_PROTOBUF, MIMETYPE_PROTOBUF_IETF })
066  public Response get(final @Context UriInfo uriInfo) {
067    MultivaluedMap<String, String> params = uriInfo.getQueryParameters();
068
069    servlet.getMetrics().incrementRequests(1);
070    try {
071      CellSetModel model = new CellSetModel();
072      for (String rk : params.get(ROW_KEYS_PARAM_NAME)) {
073        RowSpec rowSpec = new RowSpec(rk);
074
075        if (this.versions != null) {
076          rowSpec.setMaxVersions(this.versions);
077        }
078
079        if (this.columns != null) {
080          for (int i = 0; i < this.columns.length; i++) {
081            rowSpec.addColumn(Bytes.toBytes(this.columns[i]));
082          }
083        }
084
085        ResultGenerator generator = ResultGenerator.fromRowSpec(this.tableResource.getName(),
086          rowSpec, null, !params.containsKey(NOCACHE_PARAM_NAME));
087        Cell value = null;
088        RowModel rowModel = new RowModel(rowSpec.getRow());
089        if (generator.hasNext()) {
090          while ((value = generator.next()) != null) {
091            rowModel.addCell(new CellModel(CellUtil.cloneFamily(value),
092              CellUtil.cloneQualifier(value), value.getTimestamp(), CellUtil.cloneValue(value)));
093          }
094          model.addRow(rowModel);
095        } else {
096          if (LOG.isTraceEnabled()) {
097            LOG.trace("The row : " + rk + " not found in the table.");
098          }
099        }
100      }
101
102      if (model.getRows().isEmpty()) {
103        // If no rows found.
104        servlet.getMetrics().incrementFailedGetRequests(1);
105        return Response.status(Response.Status.NOT_FOUND).type(MIMETYPE_TEXT)
106          .entity("No rows found." + CRLF).build();
107      } else {
108        servlet.getMetrics().incrementSucessfulGetRequests(1);
109        return Response.ok(model).build();
110      }
111    } catch (IOException e) {
112      servlet.getMetrics().incrementFailedGetRequests(1);
113      return processException(e);
114    }
115  }
116}