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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.master.MasterServices;
32 import org.apache.hadoop.hbase.master.MetricsMaster;
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.snapshot.HBaseSnapshotException;
37 import org.apache.hadoop.hbase.util.Pair;
38
39 import com.google.common.collect.Lists;
40
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44
45
46 @InterfaceAudience.Private
47 public class EnabledTableSnapshotHandler extends TakeSnapshotHandler {
48
49 private static final Log LOG = LogFactory.getLog(EnabledTableSnapshotHandler.class);
50 private final ProcedureCoordinator coordinator;
51
52 public EnabledTableSnapshotHandler(SnapshotDescription snapshot, MasterServices master,
53 final SnapshotManager manager, final MetricsMaster metricsMaster) {
54 super(snapshot, master, metricsMaster);
55 this.coordinator = manager.getCoordinator();
56 }
57
58 @Override
59 public EnabledTableSnapshotHandler prepare() throws Exception {
60 return (EnabledTableSnapshotHandler) super.prepare();
61 }
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70
71 @Override
72 protected void snapshotRegions(List<Pair<HRegionInfo, ServerName>> regions)
73 throws HBaseSnapshotException {
74 Set<String> regionServers = new HashSet<String>(regions.size());
75 for (Pair<HRegionInfo, ServerName> region : regions) {
76 regionServers.add(region.getSecond().toString());
77 }
78
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80 Procedure proc = coordinator.startProcedure(this.monitor, this.snapshot.getName(),
81 this.snapshot.toByteArray(), Lists.newArrayList(regionServers));
82 if (proc == null) {
83 String msg = "Failed to submit distributed procedure for snapshot '"
84 + snapshot.getName() + "'";
85 LOG.error(msg);
86 throw new HBaseSnapshotException(msg);
87 }
88
89 try {
90
91
92 proc.waitForCompleted();
93 LOG.info("Done waiting - snapshot for " + this.snapshot.getName() + " finished!");
94 } catch (InterruptedException e) {
95 ForeignException ee =
96 new ForeignException("Interrupted while waiting for snapshot to finish", e);
97 monitor.receive(ee);
98 Thread.currentThread().interrupt();
99 } catch (ForeignException e) {
100 monitor.receive(e);
101 }
102 }
103 }