Golang RegionInfo.Name方法代码示例

func (krc *keyRegionCache) put(reg hrpc.RegionInfo) []hrpc.RegionInfo {
	krc.m.Lock()
	defer krc.m.Unlock()

	// Remove all the entries that are overlap with the range of the new region.
	os := krc.getOverlaps(reg)
	for _, o := range os {
		krc.regions.Delete(o.Name())
	}

	krc.regions.Put(reg.Name(), func(interface{}, bool) (interface{}, bool) {
		return reg, true
	})
	return os
}

func (krc *keyRegionCache) getOverlaps(reg hrpc.RegionInfo) []hrpc.RegionInfo {
	var overlaps []hrpc.RegionInfo
	var v interface{}
	var err error

	// deal with empty tree in the beginning so that we don't have to check
	// EOF errors for enum later
	if krc.regions.Len() == 0 {
		return overlaps
	}

	enum, ok := krc.regions.Seek(reg.Name())
	if !ok {
		// need to check if there are overlaps before what we found
		_, _, err = enum.Prev()
		if err == io.EOF {
			// we are in the end of tree, get last entry
			_, v = krc.regions.Last()
			currReg := v.(hrpc.RegionInfo)
			if isRegionOverlap(currReg, reg) {
				return append(overlaps, currReg)
			}
		} else {
			_, v, err = enum.Next()
			if err == io.EOF {
				// we are before the beginning of the tree now, get new enum
				enum.Close()
				enum, err = krc.regions.SeekFirst()
			} else {
				// otherwise, check for overlap before us
				currReg := v.(hrpc.RegionInfo)
				if isRegionOverlap(currReg, reg) {
					overlaps = append(overlaps, currReg)
				}
			}
		}
	}

	// now append all regions that overlap until the end of the tree
	// or until they don't overlap
	_, v, err = enum.Next()
	for err == nil && isRegionOverlap(v.(hrpc.RegionInfo), reg) {
		overlaps = append(overlaps, v.(hrpc.RegionInfo))
		_, v, err = enum.Next()
	}
	enum.Close()
	return overlaps
}

func (c *client) establishRegion(originalReg hrpc.RegionInfo, host string, port uint16) {
	var err error
	reg := originalReg
	backoff := backoffStart

	for {
		ctx, _ := context.WithTimeout(context.Background(), regionLookupTimeout)
		if port != 0 && err == nil {
			// If this isn't the admin or meta region, check if a client
			// for this host/port already exists
			if c.clientType != adminClient && reg != c.metaRegionInfo {
				client := c.clients.checkForClient(host, port)
				if client != nil {
					// There's already a client, add it to the
					// region and mark it as available.
					reg.SetClient(client)
					c.clients.put(client, reg)
					originalReg.MarkAvailable()
					return
				}
			}
			// Make this channel buffered so that if we time out we don't
			// block the newRegion goroutine forever.
			ch := make(chan newRegResult, 1)
			var clientType region.ClientType
			if c.clientType == standardClient {
				clientType = region.RegionClient
			} else {
				clientType = region.MasterClient
			}
			go newRegionClient(ctx, ch, clientType, host, port, c.rpcQueueSize, c.flushInterval)

			select {
			case res := <-ch:
				if res.Err == nil {
					reg.SetClient(res.Client)
					if c.clientType != adminClient && reg != c.metaRegionInfo {
						// put will set region client so that as soon as we add
						// it to the key->region mapping, concurrent readers are
						// able to find the client
						c.clients.put(res.Client, reg)
						if reg != originalReg {
							removed := c.regions.put(reg)
							for _, r := range removed {
								c.clients.del(r)
							}
						}
					}
					originalReg.MarkAvailable()
					return
				} else {
					err = res.Err
				}
			case <-ctx.Done():
				err = ErrDeadline
			}
		}
		if err != nil {
			if err == TableNotFound {
				c.regions.del(originalReg.Name())
				originalReg.MarkAvailable()
				return
			}
			// This will be hit if either there was an error locating the
			// region, or the region was located but there was an error
			// connecting to it.
			backoff, err = sleepAndIncreaseBackoff(ctx, backoff)
			if err != nil {
				continue
			}
		}
		if c.clientType == adminClient {
			host, port, err = c.zkLookup(ctx, c.master)
		} else if reg == c.metaRegionInfo {
			host, port, err = c.zkLookup(ctx, c.meta)
		} else {
			reg, host, port, err = c.locateRegion(ctx, originalReg.Table(),
				originalReg.StartKey())
		}
	}
}