Golang Server.UpdateSrvKeyspace方法代码示例

func CheckServingGraph(t *testing.T, ts topo.Server) {
	cell := getLocalCell(t, ts)

	// test individual cell/keyspace/shard/type entries
	if _, err := ts.GetSrvTabletTypesPerShard(cell, "test_keyspace", "-10"); err != topo.ErrNoNode {
		t.Errorf("GetSrvTabletTypesPerShard(invalid): %v", err)
	}
	if _, err := ts.GetEndPoints(cell, "test_keyspace", "-10", topo.TYPE_MASTER); err != topo.ErrNoNode {
		t.Errorf("GetEndPoints(invalid): %v", err)
	}

	endPoints := topo.EndPoints{
		Entries: []topo.EndPoint{
			topo.EndPoint{
				Uid:          1,
				Host:         "host1",
				NamedPortMap: map[string]int{"_vt": 1234, "_mysql": 1235, "_vts": 1236},
			},
		},
	}

	if err := ts.UpdateEndPoints(cell, "test_keyspace", "-10", topo.TYPE_MASTER, &endPoints); err != nil {
		t.Errorf("UpdateEndPoints(master): %v", err)
	}
	if types, err := ts.GetSrvTabletTypesPerShard(cell, "test_keyspace", "-10"); err != nil || len(types) != 1 || types[0] != topo.TYPE_MASTER {
		t.Errorf("GetSrvTabletTypesPerShard(1): %v %v", err, types)
	}

	addrs, err := ts.GetEndPoints(cell, "test_keyspace", "-10", topo.TYPE_MASTER)
	if err != nil {
		t.Errorf("GetEndPoints: %v", err)
	}
	if len(addrs.Entries) != 1 || addrs.Entries[0].Uid != 1 {
		t.Errorf("GetEndPoints(1): %v", addrs)
	}
	if pm := addrs.Entries[0].NamedPortMap; pm["_vt"] != 1234 || pm["_mysql"] != 1235 || pm["_vts"] != 1236 {
		t.Errorf("GetSrcTabletType(1).NamedPortmap: want %v, got %v", endPoints.Entries[0].NamedPortMap, pm)
	}

	if err := ts.UpdateTabletEndpoint(cell, "test_keyspace", "-10", topo.TYPE_REPLICA, &topo.EndPoint{Uid: 2, Host: "host2"}); err != nil {
		t.Errorf("UpdateTabletEndpoint(invalid): %v", err)
	}
	if err := ts.UpdateTabletEndpoint(cell, "test_keyspace", "-10", topo.TYPE_MASTER, &topo.EndPoint{Uid: 1, Host: "host2"}); err != nil {
		t.Errorf("UpdateTabletEndpoint(master): %v", err)
	}
	if addrs, err := ts.GetEndPoints(cell, "test_keyspace", "-10", topo.TYPE_MASTER); err != nil || len(addrs.Entries) != 1 || addrs.Entries[0].Uid != 1 {
		t.Errorf("GetEndPoints(2): %v %v", err, addrs)
	}
	if err := ts.UpdateTabletEndpoint(cell, "test_keyspace", "-10", topo.TYPE_MASTER, &topo.EndPoint{Uid: 3, Host: "host3"}); err != nil {
		t.Errorf("UpdateTabletEndpoint(master): %v", err)
	}
	if addrs, err := ts.GetEndPoints(cell, "test_keyspace", "-10", topo.TYPE_MASTER); err != nil || len(addrs.Entries) != 2 {
		t.Errorf("GetEndPoints(2): %v %v", err, addrs)
	}

	if err := ts.DeleteSrvTabletType(cell, "test_keyspace", "-10", topo.TYPE_REPLICA); err != topo.ErrNoNode {
		t.Errorf("DeleteSrvTabletType(unknown): %v", err)
	}
	if err := ts.DeleteSrvTabletType(cell, "test_keyspace", "-10", topo.TYPE_MASTER); err != nil {
		t.Errorf("DeleteSrvTabletType(master): %v", err)
	}

	// test cell/keyspace/shard entries (SrvShard)
	srvShard := topo.SrvShard{
		ServedTypes: []topo.TabletType{topo.TYPE_MASTER},
		TabletTypes: []topo.TabletType{topo.TYPE_REPLICA, topo.TYPE_RDONLY},
	}
	if err := ts.UpdateSrvShard(cell, "test_keyspace", "-10", &srvShard); err != nil {
		t.Errorf("UpdateSrvShard(1): %v", err)
	}
	if _, err := ts.GetSrvShard(cell, "test_keyspace", "666"); err != topo.ErrNoNode {
		t.Errorf("GetSrvShard(invalid): %v", err)
	}
	if s, err := ts.GetSrvShard(cell, "test_keyspace", "-10"); err != nil ||
		len(s.ServedTypes) != 1 ||
		s.ServedTypes[0] != topo.TYPE_MASTER ||
		len(s.TabletTypes) != 2 ||
		s.TabletTypes[0] != topo.TYPE_REPLICA ||
		s.TabletTypes[1] != topo.TYPE_RDONLY {
		t.Errorf("GetSrvShard(valid): %v", err)
	}

	// test cell/keyspace entries (SrvKeyspace)
	srvKeyspace := topo.SrvKeyspace{
		Partitions: map[topo.TabletType]*topo.KeyspacePartition{
			topo.TYPE_MASTER: &topo.KeyspacePartition{
				Shards: []topo.SrvShard{
					topo.SrvShard{
						ServedTypes: []topo.TabletType{topo.TYPE_MASTER},
					},
				},
			},
		},
		TabletTypes: []topo.TabletType{topo.TYPE_MASTER},
	}
	if err := ts.UpdateSrvKeyspace(cell, "test_keyspace", &srvKeyspace); err != nil {
		t.Errorf("UpdateSrvKeyspace(1): %v", err)
	}
	if _, err := ts.GetSrvKeyspace(cell, "test_keyspace666"); err != topo.ErrNoNode {
		t.Errorf("GetSrvKeyspace(invalid): %v", err)
//.........这里部分代码省略.........

//.........这里部分代码省略.........
	// Update with the wrong version.
	if err := topo.UpdateEndPoints(ctx, ts, cell, "test_keyspace", "-10", topo.TYPE_MASTER, endPoints, version+1); err != topo.ErrBadVersion {
		t.Fatalf("UpdateEndPoints(master): err = %v, want topo.ErrBadVersion", err)
	}
	// Update with the right version.
	if err := topo.UpdateEndPoints(ctx, ts, cell, "test_keyspace", "-10", topo.TYPE_MASTER, endPoints, version); err != nil {
		t.Fatalf("UpdateEndPoints(master): %v", err)
	}
	// Update existing EndPoints unconditionally.
	if err := topo.UpdateEndPoints(ctx, ts, cell, "test_keyspace", "-10", topo.TYPE_MASTER, endPoints, -1); err != nil {
		t.Fatalf("UpdateEndPoints(master): %v", err)
	}

	if err := ts.DeleteEndPoints(ctx, cell, "test_keyspace", "-10", topo.TYPE_REPLICA, -1); err != topo.ErrNoNode {
		t.Errorf("DeleteEndPoints(unknown): %v", err)
	}
	if err := ts.DeleteEndPoints(ctx, cell, "test_keyspace", "-10", topo.TYPE_MASTER, -1); err != nil {
		t.Errorf("DeleteEndPoints(master): %v", err)
	}

	// test cell/keyspace/shard entries (SrvShard)
	srvShard := &pb.SrvShard{
		Name:       "-10",
		KeyRange:   newKeyRange3("-10"),
		MasterCell: "test",
	}
	if err := ts.UpdateSrvShard(ctx, cell, "test_keyspace", "-10", srvShard); err != nil {
		t.Fatalf("UpdateSrvShard(1): %v", err)
	}
	if _, err := ts.GetSrvShard(ctx, cell, "test_keyspace", "666"); err != topo.ErrNoNode {
		t.Errorf("GetSrvShard(invalid): %v", err)
	}
	if s, err := ts.GetSrvShard(ctx, cell, "test_keyspace", "-10"); err != nil ||
		s.Name != "-10" ||
		!key.KeyRangeEqual(s.KeyRange, newKeyRange3("-10")) ||
		s.MasterCell != "test" {
		t.Errorf("GetSrvShard(valid): %v", err)
	}

	// test cell/keyspace entries (SrvKeyspace)
	srvKeyspace := topo.SrvKeyspace{
		Partitions: map[topo.TabletType]*topo.KeyspacePartition{
			topo.TYPE_MASTER: &topo.KeyspacePartition{
				ShardReferences: []topo.ShardReference{
					topo.ShardReference{
						Name:     "-80",
						KeyRange: newKeyRange("-80"),
					},
				},
			},
		},
		ShardingColumnName: "video_id",
		ShardingColumnType: key.KIT_UINT64,
		ServedFrom: map[topo.TabletType]string{
			topo.TYPE_REPLICA: "other_keyspace",
		},
	}
	if err := ts.UpdateSrvKeyspace(ctx, cell, "test_keyspace", &srvKeyspace); err != nil {
		t.Errorf("UpdateSrvKeyspace(1): %v", err)
	}
	if _, err := ts.GetSrvKeyspace(ctx, cell, "test_keyspace666"); err != topo.ErrNoNode {
		t.Errorf("GetSrvKeyspace(invalid): %v", err)
	}
	if k, err := ts.GetSrvKeyspace(ctx, cell, "test_keyspace"); err != nil ||
		len(k.Partitions) != 1 ||
		len(k.Partitions[topo.TYPE_MASTER].ShardReferences) != 1 ||
		k.Partitions[topo.TYPE_MASTER].ShardReferences[0].Name != "-80" ||
		k.Partitions[topo.TYPE_MASTER].ShardReferences[0].KeyRange != newKeyRange("-80") ||
		k.ShardingColumnName != "video_id" ||
		k.ShardingColumnType != key.KIT_UINT64 ||
		k.ServedFrom[topo.TYPE_REPLICA] != "other_keyspace" {
		t.Errorf("GetSrvKeyspace(valid): %v %v", err, k)
	}
	if k, err := ts.GetSrvKeyspaceNames(ctx, cell); err != nil || len(k) != 1 || k[0] != "test_keyspace" {
		t.Errorf("GetSrvKeyspaceNames(): %v", err)
	}

	// check that updating a SrvKeyspace out of the blue works
	if err := ts.UpdateSrvKeyspace(ctx, cell, "unknown_keyspace_so_far", &srvKeyspace); err != nil {
		t.Fatalf("UpdateSrvKeyspace(2): %v", err)
	}
	if k, err := ts.GetSrvKeyspace(ctx, cell, "unknown_keyspace_so_far"); err != nil ||
		len(k.Partitions) != 1 ||
		len(k.Partitions[topo.TYPE_MASTER].ShardReferences) != 1 ||
		k.Partitions[topo.TYPE_MASTER].ShardReferences[0].Name != "-80" ||
		k.Partitions[topo.TYPE_MASTER].ShardReferences[0].KeyRange != newKeyRange("-80") ||
		k.ShardingColumnName != "video_id" ||
		k.ShardingColumnType != key.KIT_UINT64 ||
		k.ServedFrom[topo.TYPE_REPLICA] != "other_keyspace" {
		t.Errorf("GetSrvKeyspace(out of the blue): %v %v", err, *k)
	}

	// Delete the SrvKeyspace.
	if err := ts.DeleteSrvKeyspace(ctx, cell, "unknown_keyspace_so_far"); err != nil {
		t.Fatalf("DeleteSrvShard: %v", err)
	}
	if _, err := ts.GetSrvKeyspace(ctx, cell, "unknown_keyspace_so_far"); err != topo.ErrNoNode {
		t.Errorf("GetSrvKeyspace(deleted) got %v, want ErrNoNode", err)
	}
}

//.........这里部分代码省略.........
	if err != nil {
		return err
	}

	var shardCache map[string]*topo.ShardInfo
	if rebuildSrvShards {
		shards, err := ts.GetShardNames(ctx, keyspace)
		if err != nil {
			return nil
		}

		// Rebuild all shards in parallel, save the shards
		shardCache = make(map[string]*topo.ShardInfo)
		wg := sync.WaitGroup{}
		mu := sync.Mutex{}
		rec := concurrency.FirstErrorRecorder{}
		for _, shard := range shards {
			wg.Add(1)
			go func(shard string) {
				if shardInfo, err := RebuildShard(ctx, log, ts, keyspace, shard, cells); err != nil {
					rec.RecordError(fmt.Errorf("RebuildShard failed: %v/%v %v", keyspace, shard, err))
				} else {
					mu.Lock()
					shardCache[shard] = shardInfo
					mu.Unlock()
				}
				wg.Done()
			}(shard)
		}
		wg.Wait()
		if rec.HasErrors() {
			return rec.Error()
		}

	} else {
		shardCache, err = ts.FindAllShardsInKeyspace(ctx, keyspace)
		if err != nil {
			return err
		}
	}

	// Build the list of cells to work on: we get the union
	// of all the Cells of all the Shards, limited to the provided cells.
	//
	// srvKeyspaceMap is a map:
	//   key: cell
	//   value: topo.SrvKeyspace object being built
	srvKeyspaceMap := make(map[string]*topodatapb.SrvKeyspace)
	findCellsForRebuild(ki, shardCache, cells, srvKeyspaceMap)

	// Then we add the cells from the keyspaces we might be 'ServedFrom'.
	for _, ksf := range ki.ServedFroms {
		servedFromShards, err := ts.FindAllShardsInKeyspace(ctx, ksf.Keyspace)
		if err != nil {
			return err
		}
		findCellsForRebuild(ki, servedFromShards, cells, srvKeyspaceMap)
	}

	// for each entry in the srvKeyspaceMap map, we do the following:
	// - read the SrvShard structures for each shard / cell
	// - if not present, build an empty one from global Shard
	// - compute the union of the db types (replica, master, ...)
	// - sort the shards in the list by range
	// - check the ranges are compatible (no hole, covers everything)
	for cell, srvKeyspace := range srvKeyspaceMap {
		for _, si := range shardCache {
			servedTypes := si.GetServedTypesPerCell(cell)

			// for each type this shard is supposed to serve,
			// add it to srvKeyspace.Partitions
			for _, tabletType := range servedTypes {
				partition := topoproto.SrvKeyspaceGetPartition(srvKeyspace, tabletType)
				if partition == nil {
					partition = &topodatapb.SrvKeyspace_KeyspacePartition{
						ServedType: tabletType,
					}
					srvKeyspace.Partitions = append(srvKeyspace.Partitions, partition)
				}
				partition.ShardReferences = append(partition.ShardReferences, &topodatapb.ShardReference{
					Name:     si.ShardName(),
					KeyRange: si.KeyRange,
				})
			}
		}

		if err := orderAndCheckPartitions(cell, srvKeyspace); err != nil {
			return err
		}
	}

	// and then finally save the keyspace objects
	for cell, srvKeyspace := range srvKeyspaceMap {
		log.Infof("updating keyspace serving graph in cell %v for %v", cell, keyspace)
		if err := ts.UpdateSrvKeyspace(ctx, cell, keyspace, srvKeyspace); err != nil {
			return fmt.Errorf("writing serving data failed: %v", err)
		}
	}
	return nil
}

// CheckWatchSrvKeyspace makes sure WatchSrvKeyspace works as expected
func CheckWatchSrvKeyspace(ctx context.Context, t *testing.T, ts topo.Server) {
	cell := getLocalCell(ctx, t, ts)
	keyspace := "test_keyspace"

	// start watching, should get nil first
	notifications, stopWatching, err := ts.WatchSrvKeyspace(ctx, cell, keyspace)
	if err != nil {
		t.Fatalf("WatchSrvKeyspace failed: %v", err)
	}
	sk, ok := <-notifications
	if !ok || sk != nil {
		t.Fatalf("first value is wrong: %v %v", sk, ok)
	}

	// update the SrvKeyspace, should get a notification
	srvKeyspace := &topo.SrvKeyspace{
		ShardingColumnName: "test_column",
		Partitions: map[topo.TabletType]*topo.KeyspacePartition{
			topo.TYPE_RDONLY: &topo.KeyspacePartition{
				ShardReferences: []topo.ShardReference{
					topo.ShardReference{
						Name: "0",
					},
				},
			},
		},
		ServedFrom: map[topo.TabletType]string{
			topo.TYPE_MASTER: "other_keyspace",
		},
	}
	if err := ts.UpdateSrvKeyspace(ctx, cell, keyspace, srvKeyspace); err != nil {
		t.Fatalf("UpdateSrvKeyspace failed: %v", err)
	}
	for {
		sk, ok := <-notifications
		if !ok {
			t.Fatalf("watch channel is closed???")
		}
		if sk == nil {
			// duplicate notification of the first value, that's OK
			continue
		}
		// non-empty value, that one should be ours
		if !reflect.DeepEqual(sk, srvKeyspace) {
			t.Fatalf("first value is wrong: got %v expected %v", sk, srvKeyspace)
		}
		break
	}

	// delete the SrvKeyspace, should get a notification
	if err := ts.DeleteSrvKeyspace(ctx, cell, keyspace); err != nil {
		t.Fatalf("DeleteSrvKeyspace failed: %v", err)
	}
	for {
		sk, ok := <-notifications
		if !ok {
			t.Fatalf("watch channel is closed???")
		}
		if sk == nil {
			break
		}

		// duplicate notification of the first value, that's OK,
		// but value better be good.
		if !reflect.DeepEqual(srvKeyspace, sk) {
			t.Fatalf("duplicate notification value is bad: %v", sk)
		}
	}

	// re-create the value, a bit different, should get a notification
	srvKeyspace.SplitShardCount = 2
	if err := ts.UpdateSrvKeyspace(ctx, cell, keyspace, srvKeyspace); err != nil {
		t.Fatalf("UpdateSrvKeyspace failed: %v", err)
	}
	for {
		sk, ok := <-notifications
		if !ok {
			t.Fatalf("watch channel is closed???")
		}
		if sk == nil {
			// duplicate notification of the closed value, that's OK
			continue
		}
		// non-empty value, that one should be ours
		if !reflect.DeepEqual(srvKeyspace, sk) {
			t.Fatalf("value after delete / re-create is wrong: %v %v", sk, ok)
		}
		break
	}

	// close the stopWatching channel, should eventually get a closed
	// notifications channel too
	close(stopWatching)
	for {
		sk, ok := <-notifications
		if !ok {
			break
		}
		if !reflect.DeepEqual(srvKeyspace, sk) {
//.........这里部分代码省略.........