Golang TsVbuuid.Copy方法代碼示例

func (s *storageMgr) createSnapshotWorker(streamId common.StreamId, bucket string,
	tsVbuuid *common.TsVbuuid, indexSnapMap IndexSnapMap, numVbuckets int,
	indexInstMap common.IndexInstMap, indexPartnMap IndexPartnMap, stats *IndexerStats) {

	defer destroyIndexSnapMap(indexSnapMap)

	var needsCommit bool
	snapType := tsVbuuid.GetSnapType()
	if snapType == common.DISK_SNAP {
		needsCommit = true
	}

	var wg sync.WaitGroup
	//for every index managed by this indexer
	for idxInstId, partnMap := range indexPartnMap {
		// Create snapshots for all indexes in parallel
		wg.Add(1)
		go func(idxInstId common.IndexInstId, partnMap PartitionInstMap) {
			defer wg.Done()

			idxInst := indexInstMap[idxInstId]
			idxStats := stats.indexes[idxInst.InstId]
			lastIndexSnap := indexSnapMap[idxInstId]
			//if index belongs to the flushed bucket and stream
			if idxInst.Defn.Bucket == bucket &&
				idxInst.Stream == streamId &&
				idxInst.State != common.INDEX_STATE_DELETED {

				// List of snapshots for reading current timestamp
				var isSnapCreated bool = true

				partnSnaps := make(map[common.PartitionId]PartitionSnapshot)
				//for all partitions managed by this indexer
				for partnId, partnInst := range partnMap {
					var lastPartnSnap PartitionSnapshot

					if lastIndexSnap != nil {
						lastPartnSnap = lastIndexSnap.Partitions()[partnId]
					}
					sc := partnInst.Sc

					sliceSnaps := make(map[SliceId]SliceSnapshot)
					//create snapshot for all the slices
					for _, slice := range sc.GetAllSlices() {
						var latestSnapshot Snapshot
						if lastIndexSnap.Partitions() != nil {
							lastSliceSnap := lastPartnSnap.Slices()[slice.Id()]
							latestSnapshot = lastSliceSnap.Snapshot()
						}

						//if flush timestamp is greater than last
						//snapshot timestamp, create a new snapshot
						snapTs := NewTimestamp(numVbuckets)
						if latestSnapshot != nil {
							snapTsVbuuid := latestSnapshot.Timestamp()
							snapTs = getSeqTsFromTsVbuuid(snapTsVbuuid)
						}

						ts := getSeqTsFromTsVbuuid(tsVbuuid)

						//if the flush TS is greater than the last snapshot TS
						//and slice has some changes. Skip only in-memory snapshot
						//in case of unchanged data.
						if latestSnapshot == nil || (ts.GreaterThan(snapTs) &&
							(slice.IsDirty() || needsCommit)) {

							newTsVbuuid := tsVbuuid.Copy()
							var err error
							var info SnapshotInfo
							var newSnapshot Snapshot

							logging.Tracef("StorageMgr::handleCreateSnapshot Creating New Snapshot "+
								"Index: %v PartitionId: %v SliceId: %v Commit: %v", idxInstId, partnId, slice.Id(), needsCommit)

							snapCreateStart := time.Now()
							if info, err = slice.NewSnapshot(newTsVbuuid, needsCommit); err != nil {
								logging.Errorf("handleCreateSnapshot::handleCreateSnapshot Error "+
									"Creating new snapshot Slice Index: %v Slice: %v. Skipped. Error %v", idxInstId,
									slice.Id(), err)
								isSnapCreated = false
								common.CrashOnError(err)
								continue
							}
							snapCreateDur := time.Since(snapCreateStart)

							idxStats := stats.indexes[idxInstId]
							idxStats.numSnapshots.Add(1)
							if needsCommit {
								idxStats.numCommits.Add(1)
							}

							snapOpenStart := time.Now()
							if newSnapshot, err = slice.OpenSnapshot(info); err != nil {
								logging.Errorf("StorageMgr::handleCreateSnapshot Error Creating Snapshot "+
									"for Index: %v Slice: %v. Skipped. Error %v", idxInstId,
									slice.Id(), err)
								isSnapCreated = false
								common.CrashOnError(err)
								continue
							}
//.........這裏部分代碼省略.........