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17 package org.apache.hadoop.hbase.coprocessor;
18
19 import java.util.List;
20 import java.util.Map;
21
22 import com.google.common.collect.ImmutableList;
23 import org.apache.hadoop.hbase.CoprocessorEnvironment;
24 import org.apache.hadoop.hbase.HRegionInfo;
25 import org.apache.hadoop.hbase.KeyValue;
26 import org.apache.hadoop.hbase.client.Delete;
27 import org.apache.hadoop.hbase.client.Get;
28 import org.apache.hadoop.hbase.client.Increment;
29 import org.apache.hadoop.hbase.client.Put;
30 import org.apache.hadoop.hbase.client.Result;
31 import org.apache.hadoop.hbase.client.Scan;
32 import org.apache.hadoop.hbase.filter.CompareFilter.CompareOp;
33 import org.apache.hadoop.hbase.filter.WritableByteArrayComparable;
34 import org.apache.hadoop.hbase.regionserver.HRegion;
35 import org.apache.hadoop.hbase.regionserver.InternalScanner;
36 import org.apache.hadoop.hbase.regionserver.RegionScanner;
37 import org.apache.hadoop.hbase.regionserver.Store;
38 import org.apache.hadoop.hbase.regionserver.StoreFile;
39 import org.apache.hadoop.hbase.regionserver.wal.HLogKey;
40 import org.apache.hadoop.hbase.regionserver.wal.WALEdit;
41
42 import java.io.IOException;
43
44
45
46
47
48
49 public abstract class BaseRegionObserver implements RegionObserver {
50 @Override
51 public void start(CoprocessorEnvironment e) throws IOException { }
52
53 @Override
54 public void stop(CoprocessorEnvironment e) throws IOException { }
55
56 @Override
57 public void preOpen(ObserverContext<RegionCoprocessorEnvironment> e) { }
58
59 @Override
60 public void postOpen(ObserverContext<RegionCoprocessorEnvironment> e) { }
61
62 @Override
63 public void preClose(ObserverContext<RegionCoprocessorEnvironment> e,
64 boolean abortRequested) { }
65
66 @Override
67 public void postClose(ObserverContext<RegionCoprocessorEnvironment> e,
68 boolean abortRequested) { }
69
70 @Override
71 public void preFlush(ObserverContext<RegionCoprocessorEnvironment> e) { }
72
73 @Override
74 public void postFlush(ObserverContext<RegionCoprocessorEnvironment> e) { }
75
76 @Override
77 public void preSplit(ObserverContext<RegionCoprocessorEnvironment> e) { }
78
79 @Override
80 public void postSplit(ObserverContext<RegionCoprocessorEnvironment> e,
81 HRegion l, HRegion r) { }
82
83 @Override
84 public void preCompactSelection(final ObserverContext<RegionCoprocessorEnvironment> c,
85 final Store store, final List<StoreFile> candidates) { }
86
87 @Override
88 public void postCompactSelection(final ObserverContext<RegionCoprocessorEnvironment> c,
89 final Store store, final ImmutableList<StoreFile> selected) { }
90
91 @Override
92 public InternalScanner preCompact(ObserverContext<RegionCoprocessorEnvironment> e,
93 final Store store, final InternalScanner scanner) {
94 return scanner;
95 }
96
97 @Override
98 public void postCompact(ObserverContext<RegionCoprocessorEnvironment> e,
99 final Store store, final StoreFile resultFile) { }
100
101 @Override
102 public void preGetClosestRowBefore(final ObserverContext<RegionCoprocessorEnvironment> e,
103 final byte [] row, final byte [] family, final Result result)
104 throws IOException {
105 }
106
107 @Override
108 public void postGetClosestRowBefore(final ObserverContext<RegionCoprocessorEnvironment> e,
109 final byte [] row, final byte [] family, final Result result)
110 throws IOException {
111 }
112
113 @Override
114 public void preGet(final ObserverContext<RegionCoprocessorEnvironment> e,
115 final Get get, final List<KeyValue> results) throws IOException {
116 }
117
118 @Override
119 public void postGet(final ObserverContext<RegionCoprocessorEnvironment> e,
120 final Get get, final List<KeyValue> results) throws IOException {
121 }
122
123 @Override
124 public boolean preExists(final ObserverContext<RegionCoprocessorEnvironment> e,
125 final Get get, final boolean exists) throws IOException {
126 return exists;
127 }
128
129 @Override
130 public boolean postExists(final ObserverContext<RegionCoprocessorEnvironment> e,
131 final Get get, boolean exists) throws IOException {
132 return exists;
133 }
134
135 @Override
136 public void prePut(final ObserverContext<RegionCoprocessorEnvironment> e,
137 final Put put, final WALEdit edit, final boolean writeToWAL) throws IOException {
138 }
139
140 @Override
141 public void postPut(final ObserverContext<RegionCoprocessorEnvironment> e,
142 final Put put, final WALEdit edit, final boolean writeToWAL) throws IOException {
143 }
144
145 @Override
146 public void preDelete(final ObserverContext<RegionCoprocessorEnvironment> e,
147 final Delete delete, final WALEdit edit, final boolean writeToWAL) throws IOException {
148 }
149
150 @Override
151 public void postDelete(final ObserverContext<RegionCoprocessorEnvironment> e,
152 final Delete delete, final WALEdit edit, final boolean writeToWAL) throws IOException {
153 }
154
155 @Override
156 public boolean preCheckAndPut(final ObserverContext<RegionCoprocessorEnvironment> e,
157 final byte [] row, final byte [] family, final byte [] qualifier,
158 final CompareOp compareOp, final WritableByteArrayComparable comparator,
159 final Put put, final boolean result) throws IOException {
160 return result;
161 }
162
163 @Override
164 public boolean postCheckAndPut(final ObserverContext<RegionCoprocessorEnvironment> e,
165 final byte [] row, final byte [] family, final byte [] qualifier,
166 final CompareOp compareOp, final WritableByteArrayComparable comparator,
167 final Put put, final boolean result) throws IOException {
168 return result;
169 }
170
171 @Override
172 public boolean preCheckAndDelete(final ObserverContext<RegionCoprocessorEnvironment> e,
173 final byte [] row, final byte [] family, final byte [] qualifier,
174 final CompareOp compareOp, final WritableByteArrayComparable comparator,
175 final Delete delete, final boolean result) throws IOException {
176 return result;
177 }
178
179 @Override
180 public boolean postCheckAndDelete(final ObserverContext<RegionCoprocessorEnvironment> e,
181 final byte [] row, final byte [] family, final byte [] qualifier,
182 final CompareOp compareOp, final WritableByteArrayComparable comparator,
183 final Delete delete, final boolean result) throws IOException {
184 return result;
185 }
186
187 @Override
188 public long preIncrementColumnValue(final ObserverContext<RegionCoprocessorEnvironment> e,
189 final byte [] row, final byte [] family, final byte [] qualifier,
190 final long amount, final boolean writeToWAL) throws IOException {
191 return amount;
192 }
193
194 @Override
195 public long postIncrementColumnValue(final ObserverContext<RegionCoprocessorEnvironment> e,
196 final byte [] row, final byte [] family, final byte [] qualifier,
197 final long amount, final boolean writeToWAL, long result)
198 throws IOException {
199 return result;
200 }
201
202 @Override
203 public void preIncrement(final ObserverContext<RegionCoprocessorEnvironment> e,
204 final Increment increment, final Result result) throws IOException {
205 }
206
207 @Override
208 public void postIncrement(final ObserverContext<RegionCoprocessorEnvironment> e,
209 final Increment increment, final Result result) throws IOException {
210 }
211
212 @Override
213 public RegionScanner preScannerOpen(final ObserverContext<RegionCoprocessorEnvironment> e,
214 final Scan scan, final RegionScanner s) throws IOException {
215 return s;
216 }
217
218 @Override
219 public RegionScanner postScannerOpen(final ObserverContext<RegionCoprocessorEnvironment> e,
220 final Scan scan, final RegionScanner s) throws IOException {
221 return s;
222 }
223
224 @Override
225 public boolean preScannerNext(final ObserverContext<RegionCoprocessorEnvironment> e,
226 final InternalScanner s, final List<Result> results,
227 final int limit, final boolean hasMore) throws IOException {
228 return hasMore;
229 }
230
231 @Override
232 public boolean postScannerNext(final ObserverContext<RegionCoprocessorEnvironment> e,
233 final InternalScanner s, final List<Result> results, final int limit,
234 final boolean hasMore) throws IOException {
235 return hasMore;
236 }
237
238 @Override
239 public void preScannerClose(final ObserverContext<RegionCoprocessorEnvironment> e,
240 final InternalScanner s) throws IOException {
241 }
242
243 @Override
244 public void postScannerClose(final ObserverContext<RegionCoprocessorEnvironment> e,
245 final InternalScanner s) throws IOException {
246 }
247
248 @Override
249 public void preWALRestore(ObserverContext<RegionCoprocessorEnvironment> env, HRegionInfo info,
250 HLogKey logKey, WALEdit logEdit) throws IOException {
251 }
252
253 @Override
254 public void postWALRestore(ObserverContext<RegionCoprocessorEnvironment> env,
255 HRegionInfo info, HLogKey logKey, WALEdit logEdit) throws IOException {
256 }
257 }