1 import org.apache.commons.lang.StringUtils;
2 import org.apache.hadoop.conf.Configuration;
3 import org.apache.hadoop.hbase.*;
4 import org.apache.hadoop.hbase.client.*;
5 import org.apache.hadoop.hbase.io.compress.Compression.Algorithm;
6 import org.apache.hadoop.hbase.util.Bytes;
7 import org.slf4j.Logger;
8 import org.slf4j.LoggerFactory;
9
10 import java.io.Closeable;
11 import java.io.IOException;
12 import java.io.Serializable;
13 import java.util.ArrayList;
14 import java.util.HashMap;
15 import java.util.List;
16 import java.util.Map;
17
18 /**
19 * <p>
20 * HBase工具类
21 * </p>
22 *
23 * @author 用户名 2015年6月18日 上午8:58:38
24 * @version V1.0
25 * @modify by user: {修改人} 2015年6月18日
26 * @modify by reason:{方法名}:{原因}
27 */
28 public class HBaseHolder implements Serializable,Closeable {
29
30 // 日志记录器
31 protected static final Logger LOGGER = LoggerFactory.getLogger(HBaseHolder.class);
32 private static final int DEFAULT_MAX_VERSIONS = 3;
33 // HBase配置
34 private Configuration config;
35 private Admin admin;
36 private Connection connection;
37
38 public HBaseHolder() {
39 config = HBaseConfiguration.create();
40 }
41
42 public HBaseHolder(Configuration config) {
43 this.config = config;
44 }
45
46 /**
47 * 从连接池获取HTable对象
48 *
49 * @param tableName
50 * @return
51 * @throws IOException
52 * @author
53 */
54 public Table getTable(String tableName) throws IOException {
55 return getConnection().getTable(TableName.valueOf(tableName));
56 }
57
58 /**
59 * 获取HAdmin对象，建表等操作
60 *
61 * @return
62 * @throws IOException
63 * @author
64 */
65 public Admin getHBaseAdmin() throws IOException {
66 if (admin == null) {
67 admin = getConnection().getAdmin();
68 }
69 return admin;
70 }
71
72 /**
73 * 关闭HTable对象
74 *
75 * @param table
76 * @author
77 */
78 public void doCloseTable(Table table) {
79 if (table == null) {
80 return;
81 }
82 try {
83 table.close();
84 } catch (IOException e) {
85 e.printStackTrace();
86 }
87 }
88
89 /**
90 * 创建表操作
91 *
92 * @param tableName
93 * @param families
94 * @author
95 */
96 public void createTable(String tableName, String[] families) {
97 createTable(tableName, DEFAULT_MAX_VERSIONS, null, families);
98 }
99
100 /**
101 * 创建表操作
102 *
103 * @param tableName
104 * @param splitKeys
105 * @param families
106 * @author
107 */
108 public void createTable(String tableName, byte[][] splitKeys, String[] families) {
109 createTable(tableName, DEFAULT_MAX_VERSIONS, splitKeys, families);
110 }
111
112 /**
113 * 创建表操作
114 *
115 * @param tableName
116 * @param maxVersions
117 * @param families
118 * @author
119 */
120 public void createTable(String tableName, int maxVersions, String[] families) {
121 createTable(tableName, maxVersions, null, families);
122 }
123
124 /**
125 * 创建表操作
126 *
127 * @param tableName
128 * @param family
129 * @author
130 */
131 public void createTable(String tableName, int maxVersions, byte[][] splitKeys, String[] families) {
132 // 参数判空
133 if (StringUtils.isBlank(tableName) || families == null || families.length <= 0) {
134 return;
135 }
136 try {
137 // 表不存在则创建
138 if (!getHBaseAdmin().tableExists(TableName.valueOf(tableName))) {
139 HTableDescriptor desc = new HTableDescriptor(TableName.valueOf(tableName));
140 for (String family : families) {
141 HColumnDescriptor columnDescriptor = new HColumnDescriptor(family);
142 columnDescriptor.setCompressionType(Algorithm.SNAPPY);
143 columnDescriptor.setMaxVersions(maxVersions);
144 desc.addFamily(columnDescriptor);
145 }
146 if (splitKeys != null) {
147 getHBaseAdmin().createTable(desc, splitKeys);
148 } else {
149 getHBaseAdmin().createTable(desc);
150 }
151 } else {
152 LOGGER.warn("Table " + tableName + " already exists.");
153 }
154 } catch (IOException e) {
155 LOGGER.error("", e);
156 }
157 }
158
159 /**
160 * 删除表
161 *
162 * @param tableName
163 * @author
164 */
165 public void dropTable(String tableName) {
166 Admin admin = null;
167 try {
168 admin = getHBaseAdmin();
169 if (admin.tableExists(TableName.valueOf(tableName))) {
170 admin.disableTable(TableName.valueOf(tableName));
171 admin.deleteTable(TableName.valueOf(tableName));
172 }
173 } catch (IOException e) {
174 LOGGER.error("drop table error." + e);
175 } finally {
176 if (null != admin) {
177 try {
178 admin.close();
179 } catch (IOException e) {
180 LOGGER.error("close admin error " + e);
181 }
182 }
183 }
184 }
185
186 /**
187 * 获取单个列值
188 *
189 * @param tableName
190 * @param rowkey
191 * @return
192 * @author
193 */
194 public byte[] get(String tableName, String rowkey, String family, String qualifier) {
195 Table table = null;
196 try {
197 Get get = new Get(Bytes.toBytes(rowkey));
198 get.addColumn(Bytes.toBytes(family), Bytes.toBytes(qualifier));
199 table = getTable(tableName);
200 if (getHBaseAdmin().tableExists(TableName.valueOf(tableName))) {
201 Result result = table.get(get);
202 return result.getValue(Bytes.toBytes(family), Bytes.toBytes(qualifier));
203 } else {
204 LOGGER.warn("Table " + tableName + " does not exist.");
205 }
206 } catch (IOException e) {
207 LOGGER.error("获取列值失败！ " + e);
208 e.printStackTrace();
209 }
210 return null;
211 }
212
213 /**
214 * 获取单个列值，字符串返回
215 *
216 * @param tableName
217 * @param rowkey
218 * @return
219 * @author zhanglei11
220 */
221 public String getString(String tableName, String rowkey, String family, String qualifier) {
222 return Bytes.toString(get(tableName, rowkey, family, qualifier));
223 }
224
225 /**
226 * 获取一行中某列族的值
227 *
228 * @param tableName
229 * @param rowkey
230 * @return
231 * @author
232 */
233 public Map<String, byte[]> getMapByKeyAndFamily(String tableName, String rowkey, String family) {
234 Map<String, byte[]> map = new HashMap<String, byte[]>();
235 Table table = null;
236 try {
237 Get get = new Get(Bytes.toBytes(rowkey));
238 get.addFamily(Bytes.toBytes(family));
239 table = getTable(tableName);
240 if (getHBaseAdmin().tableExists(TableName.valueOf(tableName))) {
241 Result result = table.get(get);
242 for (Cell cell : result.rawCells()) {
243 byte[] q = CellUtil.cloneQualifier(cell);
244 byte[] v = CellUtil.cloneValue(cell);
245 map.put(Bytes.toString(q), v);
246 }
247 } else {
248 LOGGER.warn("Table " + tableName + " does not exist.");
249 }
250 } catch (IOException e) {
251 e.printStackTrace();
252 }
253 return map;
254 }
255
256 /**
257 * 获取一整行的值
258 *
259 * @param tableName
260 * @param rowkey
261 * @return
262 * @author
263 */
264 public Map<String, byte[]> getRowMap(String tableName, String rowkey) {
265 Map<String, byte[]> map = new HashMap<String, byte[]>();
266 Table table = null;
267 try {
268 Get get = new Get(Bytes.toBytes(rowkey));
269 table = getTable(tableName);
270 if (getHBaseAdmin().tableExists(TableName.valueOf(tableName))) {
271 Result result = table.get(get);
272 for (Cell cell : result.rawCells()) {
273 byte[] q = CellUtil.cloneQualifier(cell);
274 byte[] v = CellUtil.cloneValue(cell);
275 map.put(Bytes.toString(q), v);
276 }
277 } else {
278 LOGGER.warn("Table " + tableName + " does not exist.");
279 }
280 } catch (IOException e) {
281 e.printStackTrace();
282 }
283 return map;
284 }
285
286 /**
287 * 获取记录
288 *
289 * @param tableName
290 * @param rowkeys
291 * @return
292 */
293 public Result[] getRecodes(String tableName, List<String> rowkeys) {
294 Table table = null;
295 if (rowkeys == null || rowkeys.size() == 0) {
296 LOGGER.warn("Has no rowkeys to get.");
297 return null;
298 }
299 try {
300 List<Get> gets = new ArrayList<>();
301 Get get = null;
302 for (String rowkey : rowkeys) {
303 get = new Get(Bytes.toBytes(rowkey));
304 gets.add(get);
305 }
306 table = getTable(tableName);
307 if (getHBaseAdmin().tableExists(TableName.valueOf(tableName))) {
308 Result[] results = table.get(gets);
309 return results;
310 } else {
311 LOGGER.warn("Table " + tableName + " does not exist.");
312 return null;
313 }
314 } catch (IOException e) {
315 LOGGER.error("get table [{}] recodes error", tableName, e);
316 return null;
317 }
318 }
319
320 /**
321 * 获取记录
322 *
323 * @param tableName
324 * @param rowkey
325 * @return
326 */
327 public Result getRecode(String tableName, String rowkey) {
328 Table table = null;
329 try {
330 Get get = new Get(Bytes.toBytes(rowkey));
331 table = getTable(tableName);
332 if (getHBaseAdmin().tableExists(TableName.valueOf(tableName))) {
333 Result result = table.get(get);
334 return result;
335 } else {
336 LOGGER.warn("Table " + tableName + " does not exist.");
337 return null;
338 }
339 } catch (IOException e) {
340 LOGGER.error("get table [{}] recodes error", tableName, e);
341 return null;
342 }
343 }
344
345 /**
346 * 获取记录
347 *
348 * @param tableName
349 * @param gets
350 * @return
351 */
352 public Result[] getRecodesByGets(String tableName, List<Get> gets) {
353 Table table = null;
354 if (gets == null || gets.size() == 0) {
355 LOGGER.warn("Has no gets to get.");
356 return null;
357 }
358 try {
359 table = getTable(tableName);
360 if (getHBaseAdmin().tableExists(TableName.valueOf(tableName))) {
361 Result[] results = table.get(gets);
362 return results;
363 } else {
364 LOGGER.warn("Table " + tableName + " does not exist.");
365 return null;
366 }
367 } catch (IOException e) {
368 LOGGER.error("get table [{}] recodes error", tableName, e);
369 return null;
370 }
371 }
372
373 /**
374 * 获取记录
375 *
376 * @param tableName
377 * @param get
378 * @return
379 */
380 public Result getRecodeByGet(String tableName, Get get) {
381 Table table = null;
382 try {
383 table = getTable(tableName);
384 if (getHBaseAdmin().tableExists(TableName.valueOf(tableName))) {
385 Result result = table.get(get);
386 return result;
387 } else {
388 LOGGER.warn("Table " + tableName + " does not exist.");
389 return null;
390 }
391 } catch (IOException e) {
392 LOGGER.error("get table [{}] recodes error", tableName, e);
393 return null;
394 }
395 }
396
397 /**
398 * 检测HBase服务是否可用
399 *
400 * @return
401 * @author
402 */
403 public boolean isHBaseAvailable() {
404 try {
405 HBaseAdmin.checkHBaseAvailable(config);
406 } catch (ZooKeeperConnectionException zkce) {
407 LOGGER.error("", zkce);
408 return false;
409 } catch (MasterNotRunningException e) {
410 LOGGER.error("", e);
411 return false;
412 } catch (Exception e) {
413 LOGGER.error("Check HBase available throws an Exception. We don‘t know whether HBase is running or not.", e);
414 return false;
415 }
416 return true;
417 }
418
419 public Connection getConnection() {
420 if (connection == null) {
421 try {
422 connection = ConnectionFactory.createConnection(config);
423 } catch (IOException e) {
424 LOGGER.error("Create HBase connect error.", e);
425 }
426 }
427 return connection;
428 }
429
430 @Override
431 public void close() throws IOException {
432 if(admin != null){
433 admin.close();
434 admin = null;
435 }
436 if(connection != null){
437 connection.close();
438 connection = null;
439 }
440 }
441 }
时间： 2024-10-10 10:58:18