-
Notifications
You must be signed in to change notification settings - Fork 277
/
metadata.go
93 lines (84 loc) · 2.97 KB
/
metadata.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
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
// Licensed to LinDB under one or more contributor
// license agreements. See the NOTICE file distributed with
// this work for additional information regarding copyright
// ownership. LinDB licenses this file to you 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 agreed to 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 command
import (
"context"
depspkg "github.com/lindb/lindb/app/root/deps"
"github.com/lindb/lindb/constants"
"github.com/lindb/lindb/coordinator/discovery"
"github.com/lindb/lindb/coordinator/root"
"github.com/lindb/lindb/internal/client"
"github.com/lindb/lindb/models"
stmtpkg "github.com/lindb/lindb/sql/stmt"
)
// for testing
var (
// NewRestyFn represents new resty client.
NewStateMachineCliFn = client.NewStateMachineCli
)
var brokerRole = map[string]models.StateMachineInfo{
constants.BrokerState: {
Path: constants.BrokerState,
CreateState: func() interface{} {
return &models.BrokerState{}
},
},
}
// MetadataCommand executes the metadata query.
func MetadataCommand(ctx context.Context, deps *depspkg.HTTPDeps,
_ *models.ExecuteParam, stmt stmtpkg.Statement) (interface{}, error) {
metadataStmt := stmt.(*stmtpkg.Metadata)
if metadataStmt.MetadataType == stmtpkg.MetadataTypes {
// returns metadata explore define info.
return map[string]interface{}{
constants.RootRole: root.StateMachinePaths,
constants.BrokerRole: brokerRole,
}, nil
}
// explore metadata
switch metadataStmt.Source {
case stmtpkg.StateRepoSource:
return exploreStateRepoData(ctx, deps, metadataStmt)
case stmtpkg.StateMachineSource:
return exploreStateMachineDate(metadataStmt, deps)
}
return nil, nil
}
// exploreStateRepoData explores state data from repo.
func exploreStateRepoData(ctx context.Context, deps *depspkg.HTTPDeps,
metadataStmt *stmtpkg.Metadata) (interface{}, error) {
stateMachineInfo, ok := root.StateMachinePaths[metadataStmt.Type]
if !ok {
return nil, nil
}
return discovery.ExploreData(ctx, deps.Repo, stateMachineInfo)
}
// exploreStateMachineDate explores the state from state machine of broker/master/storage.
func exploreStateMachineDate(metadataStmt *stmtpkg.Metadata, deps *depspkg.HTTPDeps) (interface{}, error) {
param := map[string]string{
"type": metadataStmt.Type,
"brokerName": metadataStmt.ClusterName,
}
var nodes []models.Node
statelessNodes := deps.StateMgr.GetLiveNodes()
for idx := range statelessNodes {
nodes = append(nodes, &statelessNodes[idx])
}
// forward to live nodes
cli := NewStateMachineCliFn()
return cli.FetchStateByNodes(param, nodes), nil
}