Golang Server.DeleteSrvKeyspace方法代碼示例

//.........這裏部分代碼省略.........
	// 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)
	}
}

// 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) {
//.........這裏部分代碼省略.........