/**
* Restore the specified snapshot. The restore will fail if the destination table has a snapshot
* or restore in progress.
*
* @param reqSnapshot Snapshot Descriptor from request
* @param tableName table to restore
* @param snapshot Snapshot Descriptor
* @param snapshotTableDesc Table Descriptor
* @param nonceGroup unique value to prevent duplicated RPC
* @param nonce unique value to prevent duplicated RPC
* @return procId the ID of the restore snapshot procedure
* @throws IOException
*/
private long restoreSnapshot(
final SnapshotDescription reqSnapshot,
final TableName tableName,
final SnapshotDescription snapshot,
final HTableDescriptor snapshotTableDesc,
final long nonceGroup,
final long nonce)
throws IOException {
MasterCoprocessorHost cpHost = master.getMasterCoprocessorHost();
if (master
.getTableStateManager()
.isTableState(TableName.valueOf(snapshot.getTable()), TableState.State.ENABLED)) {
throw new UnsupportedOperationException(
"Table '"
+ TableName.valueOf(snapshot.getTable())
+ "' must be disabled in order to "
+ "perform a restore operation.");
}
// call Coprocessor pre hook
if (cpHost != null) {
cpHost.preRestoreSnapshot(reqSnapshot, snapshotTableDesc);
}
long procId;
try {
procId = restoreSnapshot(snapshot, snapshotTableDesc, nonceGroup, nonce);
} catch (IOException e) {
LOG.error(
"Exception occurred while restoring the snapshot "
+ snapshot.getName()
+ " as table "
+ tableName.getNameAsString(),
e);
throw e;
}
LOG.info("Restore snapshot=" + snapshot.getName() + " as table=" + tableName);
if (cpHost != null) {
cpHost.postRestoreSnapshot(reqSnapshot, snapshotTableDesc);
}
return procId;
}
