hbase-server/src/test/java/org/apache/hadoop/hbase/MetaMockingUtil.java

   1 /**
   2  * Licensed to the Apache Software Foundation (ASF) under one
   3  * or more contributor license agreements.  See the NOTICE file
   4  * distributed with this work for additional information
   5  * regarding copyright ownership.  The ASF licenses this file
   6  * to you under the Apache License, Version 2.0 (the
   7  * "License"); you may not use this file except in compliance
   8  * with the License.  You may obtain a copy of the License at
   9  *
  10  *     http://www.apache.org/licenses/LICENSE-2.0
  11  *
  12  * Unless required by applicable law or agreed to in writing, software
  13  * distributed under the License is distributed on an "AS IS" BASIS,
  14  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  15  * See the License for the specific language governing permissions and
  16  * limitations under the License.
  17  */
  18
  19 package org.apache.hadoop.hbase;
  20
  21 import java.io.IOException;
  22 import java.util.ArrayList;
  23 import java.util.Collections;
  24 import java.util.List;
  25
  26 import org.apache.hadoop.hbase.client.RegionInfo;
  27 import org.apache.hadoop.hbase.client.Result;
  28 import org.apache.hadoop.hbase.util.Bytes;
  29
  30 /**
  31  * Mocking utility for common hbase:meta functionality
  32  */
  33 public class MetaMockingUtil {
  34
  35   /**
  36    * Returns a Result object constructed from the given region information simulating
  37    * a catalog table result.
  38    * @param region the HRegionInfo object or null
  39    * @return A mocked up Result that fakes a Get on a row in the <code>hbase:meta</code> table.
  40    * @throws IOException
  41    */
  42   public static Result getMetaTableRowResult(final HRegionInfo region)
  43       throws IOException {
  44     return getMetaTableRowResult(region, null, null, null);
  45   }
  46
  47   /**
  48    * Returns a Result object constructed from the given region information simulating
  49    * a catalog table result.
  50    * @param region the HRegionInfo object or null
  51    * @param sn to use making startcode and server hostname:port in meta or null
  52    * @return A mocked up Result that fakes a Get on a row in the <code>hbase:meta</code> table.
  53    * @throws IOException
  54    */
  55   public static Result getMetaTableRowResult(final HRegionInfo region, final ServerName sn)
  56       throws IOException {
  57     return getMetaTableRowResult(region, sn, null, null);
  58   }
  59
  60   /**
  61    * Returns a Result object constructed from the given region information simulating
  62    * a catalog table result.
  63    * @param region the RegionInfo object or null
  64    * @param sn to use making startcode and server hostname:port in meta or null
  65    * @param splita daughter region or null
  66    * @param splitb  daughter region or null
  67    * @return A mocked up Result that fakes a Get on a row in the <code>hbase:meta</code> table.
  68    * @throws IOException
  69    */
  70   public static Result getMetaTableRowResult(RegionInfo region, final ServerName sn,
  71       RegionInfo splita, RegionInfo splitb) throws IOException {
  72     List<Cell> kvs = new ArrayList<>();
  73     if (region != null) {
  74       kvs.add(new KeyValue(
  75         region.getRegionName(),
  76         HConstants.CATALOG_FAMILY, HConstants.REGIONINFO_QUALIFIER,
  77         RegionInfo.toByteArray(region)));
  78     }
  79
  80     if (sn != null) {
  81       kvs.add(new KeyValue(region.getRegionName(),
  82         HConstants.CATALOG_FAMILY, HConstants.SERVER_QUALIFIER,
  83         Bytes.toBytes(sn.getHostAndPort())));
  84       kvs.add(new KeyValue(region.getRegionName(),
  85         HConstants.CATALOG_FAMILY, HConstants.STARTCODE_QUALIFIER,
  86         Bytes.toBytes(sn.getStartcode())));
  87     }
  88
  89     if (splita != null) {
  90       kvs.add(new KeyValue(
  91           region.getRegionName(),
  92           HConstants.CATALOG_FAMILY, HConstants.SPLITA_QUALIFIER,
  93           RegionInfo.toByteArray(splita)));
  94     }
  95
  96     if (splitb != null) {
  97       kvs.add(new KeyValue(
  98           region.getRegionName(),
  99           HConstants.CATALOG_FAMILY, HConstants.SPLITB_QUALIFIER,
 100           RegionInfo.toByteArray(splitb)));
 101     }
 102
 103     //important: sort the kvs so that binary search work
 104     Collections.sort(kvs, CellComparatorImpl.META_COMPARATOR);
 105
 106     return Result.create(kvs);
 107   }
 108
 109 }