forked from vitessio/vitess
-
Notifications
You must be signed in to change notification settings - Fork 0
/
checkpoint.go
73 lines (58 loc) · 1.9 KB
/
checkpoint.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
/*
Copyright 2017 Google Inc.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreedto in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package workflow
import (
"sync"
"golang.org/x/net/context"
"github.com/golang/protobuf/proto"
"vitess.io/vitess/go/vt/topo"
workflowpb "vitess.io/vitess/go/vt/proto/workflow"
)
// CheckpointWriter saves the checkpoint data into topology server.
type CheckpointWriter struct {
topoServer *topo.Server
// checkpointMu is used for protecting data access during checkpointing.
mu sync.Mutex
checkpoint *workflowpb.WorkflowCheckpoint
wi *topo.WorkflowInfo
}
// NewCheckpointWriter creates a CheckpointWriter.
func NewCheckpointWriter(ts *topo.Server, checkpoint *workflowpb.WorkflowCheckpoint, wi *topo.WorkflowInfo) *CheckpointWriter {
return &CheckpointWriter{
topoServer: ts,
checkpoint: checkpoint,
wi: wi,
}
}
// UpdateTask updates the task status in the checkpointing copy and
// saves the full checkpoint to the topology server.
func (c *CheckpointWriter) UpdateTask(taskID string, status workflowpb.TaskState, err error) error {
c.mu.Lock()
defer c.mu.Unlock()
errorMessage := ""
if err != nil {
errorMessage = err.Error()
}
t := c.checkpoint.Tasks[taskID]
t.State = status
t.Error = errorMessage
return c.saveLocked()
}
func (c *CheckpointWriter) saveLocked() error {
var err error
c.wi.Data, err = proto.Marshal(c.checkpoint)
if err != nil {
return err
}
return c.topoServer.SaveWorkflow(context.TODO(), c.wi)
}