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18 package org.apache.hadoop.hbase.coprocessor.example;
19
20 import java.io.IOException;
21 import java.util.ArrayList;
22 import java.util.HashSet;
23 import java.util.List;
24 import java.util.Set;
25 import java.util.TreeSet;
26
27 import org.apache.commons.logging.Log;
28 import org.apache.commons.logging.LogFactory;
29 import org.apache.hadoop.hbase.CellUtil;
30 import org.apache.hadoop.hbase.Coprocessor;
31 import org.apache.hadoop.hbase.CoprocessorEnvironment;
32 import org.apache.hadoop.hbase.HConstants;
33 import org.apache.hadoop.hbase.Cell;
34 import org.apache.hadoop.hbase.HConstants.OperationStatusCode;
35 import org.apache.hadoop.hbase.client.Delete;
36 import org.apache.hadoop.hbase.client.Mutation;
37 import org.apache.hadoop.hbase.client.Scan;
38 import org.apache.hadoop.hbase.coprocessor.CoprocessorException;
39 import org.apache.hadoop.hbase.coprocessor.CoprocessorService;
40 import org.apache.hadoop.hbase.coprocessor.RegionCoprocessorEnvironment;
41 import org.apache.hadoop.hbase.coprocessor.example.generated.BulkDeleteProtos.BulkDeleteRequest;
42 import org.apache.hadoop.hbase.coprocessor.example.generated.BulkDeleteProtos.BulkDeleteResponse;
43 import org.apache.hadoop.hbase.coprocessor.example.generated.BulkDeleteProtos.BulkDeleteService;
44 import org.apache.hadoop.hbase.coprocessor.example.generated.BulkDeleteProtos.BulkDeleteRequest.DeleteType;
45 import org.apache.hadoop.hbase.coprocessor.example.generated.BulkDeleteProtos.BulkDeleteResponse.Builder;
46 import org.apache.hadoop.hbase.filter.FirstKeyOnlyFilter;
47 import org.apache.hadoop.hbase.protobuf.ProtobufUtil;
48 import org.apache.hadoop.hbase.protobuf.ResponseConverter;
49 import org.apache.hadoop.hbase.regionserver.HRegion;
50 import org.apache.hadoop.hbase.regionserver.OperationStatus;
51 import org.apache.hadoop.hbase.regionserver.RegionScanner;
52 import org.apache.hadoop.hbase.util.Bytes;
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54 import com.google.protobuf.RpcCallback;
55 import com.google.protobuf.RpcController;
56 import com.google.protobuf.Service;
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98 public class BulkDeleteEndpoint extends BulkDeleteService implements CoprocessorService,
99 Coprocessor {
100 private static final String NO_OF_VERSIONS_TO_DELETE = "noOfVersionsToDelete";
101 private static final Log LOG = LogFactory.getLog(BulkDeleteEndpoint.class);
102
103 private RegionCoprocessorEnvironment env;
104
105 @Override
106 public Service getService() {
107 return this;
108 }
109
110 @Override
111 public void delete(RpcController controller, BulkDeleteRequest request,
112 RpcCallback<BulkDeleteResponse> done) {
113 long totalRowsDeleted = 0L;
114 long totalVersionsDeleted = 0L;
115 HRegion region = env.getRegion();
116 int rowBatchSize = request.getRowBatchSize();
117 Long timestamp = null;
118 if (request.hasTimestamp()) {
119 timestamp = request.getTimestamp();
120 }
121 DeleteType deleteType = request.getDeleteType();
122 boolean hasMore = true;
123 RegionScanner scanner = null;
124 try {
125 Scan scan = ProtobufUtil.toScan(request.getScan());
126 if (scan.getFilter() == null && deleteType == DeleteType.ROW) {
127
128
129
130 scan.setFilter(new FirstKeyOnlyFilter());
131 }
132
133
134 scanner = region.getScanner(scan);
135 while (hasMore) {
136 List<List<Cell>> deleteRows = new ArrayList<List<Cell>>(rowBatchSize);
137 for (int i = 0; i < rowBatchSize; i++) {
138 List<Cell> results = new ArrayList<Cell>();
139 hasMore = scanner.next(results);
140 if (results.size() > 0) {
141 deleteRows.add(results);
142 }
143 if (!hasMore) {
144
145 break;
146 }
147 }
148 if (deleteRows.size() > 0) {
149 Mutation[] deleteArr = new Mutation[deleteRows.size()];
150 int i = 0;
151 for (List<Cell> deleteRow : deleteRows) {
152 deleteArr[i++] = createDeleteMutation(deleteRow, deleteType, timestamp);
153 }
154 OperationStatus[] opStatus = region.batchMutate(deleteArr);
155 for (i = 0; i < opStatus.length; i++) {
156 if (opStatus[i].getOperationStatusCode() != OperationStatusCode.SUCCESS) {
157 break;
158 }
159 totalRowsDeleted++;
160 if (deleteType == DeleteType.VERSION) {
161 byte[] versionsDeleted = deleteArr[i].getAttribute(
162 NO_OF_VERSIONS_TO_DELETE);
163 if (versionsDeleted != null) {
164 totalVersionsDeleted += Bytes.toInt(versionsDeleted);
165 }
166 }
167 }
168 }
169 }
170 } catch (IOException ioe) {
171 LOG.error(ioe);
172
173 ResponseConverter.setControllerException(controller, ioe);
174 } finally {
175 if (scanner != null) {
176 try {
177 scanner.close();
178 } catch (IOException ioe) {
179 LOG.error(ioe);
180 }
181 }
182 }
183 Builder responseBuilder = BulkDeleteResponse.newBuilder();
184 responseBuilder.setRowsDeleted(totalRowsDeleted);
185 if (deleteType == DeleteType.VERSION) {
186 responseBuilder.setVersionsDeleted(totalVersionsDeleted);
187 }
188 BulkDeleteResponse result = responseBuilder.build();
189 done.run(result);
190 }
191
192 private Delete createDeleteMutation(List<Cell> deleteRow, DeleteType deleteType,
193 Long timestamp) {
194 long ts;
195 if (timestamp == null) {
196 ts = HConstants.LATEST_TIMESTAMP;
197 } else {
198 ts = timestamp;
199 }
200
201 byte[] row = CellUtil.cloneRow(deleteRow.get(0));
202 Delete delete = new Delete(row, ts);
203 if (deleteType == DeleteType.FAMILY) {
204 Set<byte[]> families = new TreeSet<byte[]>(Bytes.BYTES_COMPARATOR);
205 for (Cell kv : deleteRow) {
206 if (families.add(CellUtil.cloneFamily(kv))) {
207 delete.deleteFamily(CellUtil.cloneFamily(kv), ts);
208 }
209 }
210 } else if (deleteType == DeleteType.COLUMN) {
211 Set<Column> columns = new HashSet<Column>();
212 for (Cell kv : deleteRow) {
213 Column column = new Column(CellUtil.cloneFamily(kv), CellUtil.cloneQualifier(kv));
214 if (columns.add(column)) {
215
216
217
218 delete.deleteColumns(column.family, column.qualifier, ts);
219 }
220 }
221 } else if (deleteType == DeleteType.VERSION) {
222
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226 int noOfVersionsToDelete = 0;
227 if (timestamp == null) {
228 for (Cell kv : deleteRow) {
229 delete.deleteColumn(CellUtil.cloneFamily(kv), CellUtil.cloneQualifier(kv), kv.getTimestamp());
230 noOfVersionsToDelete++;
231 }
232 } else {
233 Set<Column> columns = new HashSet<Column>();
234 for (Cell kv : deleteRow) {
235 Column column = new Column(CellUtil.cloneFamily(kv), CellUtil.cloneQualifier(kv));
236
237 if (columns.add(column)) {
238 delete.deleteColumn(column.family, column.qualifier, ts);
239 noOfVersionsToDelete++;
240 }
241 }
242 }
243 delete.setAttribute(NO_OF_VERSIONS_TO_DELETE, Bytes.toBytes(noOfVersionsToDelete));
244 }
245 return delete;
246 }
247
248 private static class Column {
249 private byte[] family;
250 private byte[] qualifier;
251
252 public Column(byte[] family, byte[] qualifier) {
253 this.family = family;
254 this.qualifier = qualifier;
255 }
256
257 @Override
258 public boolean equals(Object other) {
259 if (!(other instanceof Column)) {
260 return false;
261 }
262 Column column = (Column) other;
263 return Bytes.equals(this.family, column.family)
264 && Bytes.equals(this.qualifier, column.qualifier);
265 }
266
267 @Override
268 public int hashCode() {
269 int h = 31;
270 h = h + 13 * Bytes.hashCode(this.family);
271 h = h + 13 * Bytes.hashCode(this.qualifier);
272 return h;
273 }
274 }
275
276 @Override
277 public void start(CoprocessorEnvironment env) throws IOException {
278 if (env instanceof RegionCoprocessorEnvironment) {
279 this.env = (RegionCoprocessorEnvironment) env;
280 } else {
281 throw new CoprocessorException("Must be loaded on a table region!");
282 }
283 }
284
285 @Override
286 public void stop(CoprocessorEnvironment env) throws IOException {
287
288 }
289 }