1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18 package org.apache.hadoop.hbase.master.snapshot;
19
20 import java.io.IOException;
21 import java.util.HashSet;
22 import java.util.List;
23 import java.util.Set;
24
25 import org.apache.commons.logging.Log;
26 import org.apache.commons.logging.LogFactory;
27 import org.apache.hadoop.classification.InterfaceAudience;
28 import org.apache.hadoop.hbase.HRegionInfo;
29 import org.apache.hadoop.hbase.ServerName;
30 import org.apache.hadoop.hbase.errorhandling.ForeignException;
31 import org.apache.hadoop.hbase.exceptions.HBaseSnapshotException;
32 import org.apache.hadoop.hbase.master.MasterServices;
33 import org.apache.hadoop.hbase.procedure.Procedure;
34 import org.apache.hadoop.hbase.procedure.ProcedureCoordinator;
35 import org.apache.hadoop.hbase.protobuf.generated.HBaseProtos.SnapshotDescription;
36 import org.apache.hadoop.hbase.util.Pair;
37
38 import com.google.common.collect.Lists;
39
40
41
42
43
44
45 @InterfaceAudience.Private
46 public class EnabledTableSnapshotHandler extends TakeSnapshotHandler {
47
48 private static final Log LOG = LogFactory.getLog(EnabledTableSnapshotHandler.class);
49 private final ProcedureCoordinator coordinator;
50
51 public EnabledTableSnapshotHandler(SnapshotDescription snapshot, MasterServices master,
52 SnapshotManager manager) throws IOException {
53 super(snapshot, master);
54 this.coordinator = manager.getCoordinator();
55 }
56
57 @Override
58 public EnabledTableSnapshotHandler prepare() throws Exception {
59 return (EnabledTableSnapshotHandler) super.prepare();
60 }
61
62
63
64
65
66
67
68
69
70 @Override
71 protected void snapshotRegions(List<Pair<HRegionInfo, ServerName>> regions)
72 throws HBaseSnapshotException {
73 Set<String> regionServers = new HashSet<String>(regions.size());
74 for (Pair<HRegionInfo, ServerName> region : regions) {
75 regionServers.add(region.getSecond().toString());
76 }
77
78
79 Procedure proc = coordinator.startProcedure(this.monitor, this.snapshot.getName(),
80 this.snapshot.toByteArray(), Lists.newArrayList(regionServers));
81 if (proc == null) {
82 String msg = "Failed to submit distributed procedure for snapshot '"
83 + snapshot.getName() + "'";
84 LOG.error(msg);
85 throw new HBaseSnapshotException(msg);
86 }
87
88 try {
89
90
91 proc.waitForCompleted();
92 LOG.info("Done waiting - snapshot for " + this.snapshot.getName() + " finished!");
93 } catch (InterruptedException e) {
94 ForeignException ee =
95 new ForeignException("Interrupted while waiting for snapshot to finish", e);
96 monitor.receive(ee);
97 Thread.currentThread().interrupt();
98 } catch (ForeignException e) {
99 monitor.receive(e);
100 }
101 }
102 }