1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20 package org.apache.hadoop.hbase.mapreduce;
21
22 import java.io.IOException;
23
24 import org.apache.commons.logging.Log;
25 import org.apache.commons.logging.LogFactory;
26 import org.apache.hadoop.conf.Configurable;
27 import org.apache.hadoop.conf.Configuration;
28 import org.apache.hadoop.hbase.KeyValue;
29 import org.apache.hadoop.hbase.client.HTable;
30 import org.apache.hadoop.hbase.client.Scan;
31 import org.apache.hadoop.hbase.util.Bytes;
32 import org.apache.hadoop.util.StringUtils;
33
34
35
36
37 public class TableInputFormat extends TableInputFormatBase
38 implements Configurable {
39
40 private final Log LOG = LogFactory.getLog(TableInputFormat.class);
41
42
43 public static final String INPUT_TABLE = "hbase.mapreduce.inputtable";
44
45
46
47 public static final String SCAN = "hbase.mapreduce.scan";
48
49 public static final String SCAN_ROW_START = "hbase.mapreduce.scan.row.start";
50
51 public static final String SCAN_ROW_STOP = "hbase.mapreduce.scan.row.stop";
52
53 public static final String SCAN_COLUMN_FAMILY = "hbase.mapreduce.scan.column.family";
54
55 public static final String SCAN_COLUMNS = "hbase.mapreduce.scan.columns";
56
57 public static final String SCAN_TIMESTAMP = "hbase.mapreduce.scan.timestamp";
58
59 public static final String SCAN_TIMERANGE_START = "hbase.mapreduce.scan.timerange.start";
60
61 public static final String SCAN_TIMERANGE_END = "hbase.mapreduce.scan.timerange.end";
62
63 public static final String SCAN_MAXVERSIONS = "hbase.mapreduce.scan.maxversions";
64
65 public static final String SCAN_CACHEBLOCKS = "hbase.mapreduce.scan.cacheblocks";
66
67 public static final String SCAN_CACHEDROWS = "hbase.mapreduce.scan.cachedrows";
68
69
70 private Configuration conf = null;
71
72
73
74
75
76
77
78 @Override
79 public Configuration getConf() {
80 return conf;
81 }
82
83
84
85
86
87
88
89
90
91 @Override
92 public void setConf(Configuration configuration) {
93 this.conf = configuration;
94 String tableName = conf.get(INPUT_TABLE);
95 try {
96 setHTable(new HTable(new Configuration(conf), tableName));
97 } catch (Exception e) {
98 LOG.error(StringUtils.stringifyException(e));
99 }
100
101 Scan scan = null;
102
103 if (conf.get(SCAN) != null) {
104 try {
105 scan = TableMapReduceUtil.convertStringToScan(conf.get(SCAN));
106 } catch (IOException e) {
107 LOG.error("An error occurred.", e);
108 }
109 } else {
110 try {
111 scan = new Scan();
112
113 if (conf.get(SCAN_ROW_START) != null) {
114 scan.setStartRow(Bytes.toBytes(conf.get(SCAN_ROW_START)));
115 }
116
117 if (conf.get(SCAN_ROW_STOP) != null) {
118 scan.setStopRow(Bytes.toBytes(conf.get(SCAN_ROW_STOP)));
119 }
120
121 if (conf.get(SCAN_COLUMNS) != null) {
122 addColumns(scan, conf.get(SCAN_COLUMNS));
123 }
124
125 if (conf.get(SCAN_COLUMN_FAMILY) != null) {
126 scan.addFamily(Bytes.toBytes(conf.get(SCAN_COLUMN_FAMILY)));
127 }
128
129 if (conf.get(SCAN_TIMESTAMP) != null) {
130 scan.setTimeStamp(Long.parseLong(conf.get(SCAN_TIMESTAMP)));
131 }
132
133 if (conf.get(SCAN_TIMERANGE_START) != null && conf.get(SCAN_TIMERANGE_END) != null) {
134 scan.setTimeRange(
135 Long.parseLong(conf.get(SCAN_TIMERANGE_START)),
136 Long.parseLong(conf.get(SCAN_TIMERANGE_END)));
137 }
138
139 if (conf.get(SCAN_MAXVERSIONS) != null) {
140 scan.setMaxVersions(Integer.parseInt(conf.get(SCAN_MAXVERSIONS)));
141 }
142
143 if (conf.get(SCAN_CACHEDROWS) != null) {
144 scan.setCaching(Integer.parseInt(conf.get(SCAN_CACHEDROWS)));
145 }
146
147
148 scan.setCacheBlocks((conf.getBoolean(SCAN_CACHEBLOCKS, false)));
149 } catch (Exception e) {
150 LOG.error(StringUtils.stringifyException(e));
151 }
152 }
153
154 setScan(scan);
155 }
156
157
158
159
160
161
162
163
164
165
166
167
168 private static void addColumn(Scan scan, byte[] familyAndQualifier) {
169 byte [][] fq = KeyValue.parseColumn(familyAndQualifier);
170 if (fq.length > 1 && fq[1] != null && fq[1].length > 0) {
171 scan.addColumn(fq[0], fq[1]);
172 } else {
173 scan.addFamily(fq[0]);
174 }
175 }
176
177
178
179
180
181
182
183
184 public static void addColumns(Scan scan, byte [][] columns) {
185 for (byte[] column : columns) {
186 addColumn(scan, column);
187 }
188 }
189
190
191
192
193
194
195
196
197
198
199 private static void addColumns(Scan scan, String columns) {
200 String[] cols = columns.split(" ");
201 for (String col : cols) {
202 addColumn(scan, Bytes.toBytes(col));
203 }
204 }
205
206 }