/
job.go
185 lines (161 loc) · 5.28 KB
/
job.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
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
// Copyright 2020 the go-etl Authors.
//
// 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 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 dbms
import (
"context"
"fmt"
"time"
"github.com/Breeze0806/go-etl/config"
coreconst "github.com/Breeze0806/go-etl/datax/common/config/core"
"github.com/Breeze0806/go-etl/datax/common/plugin"
"github.com/Breeze0806/go-etl/element"
"github.com/Breeze0806/go-etl/storage/database"
"github.com/pingcap/errors"
)
// Job
type Job struct {
*plugin.BaseJob
Querier Querier
Config Config
handler DbHandler
}
// NewJob Get job through database handler
func NewJob(handler DbHandler) *Job {
return &Job{
BaseJob: plugin.NewBaseJob(),
handler: handler,
}
}
// Init Initialization
func (j *Job) Init(ctx context.Context) (err error) {
var name string
if name, err = j.PluginConf().GetString("dialect"); err != nil {
return errors.Wrapf(err, "GetString fail")
}
if j.Config, err = j.handler.Config(j.PluginJobConf()); err != nil {
return errors.Wrapf(err, "Config fail")
}
var jobSettingConf *config.JSON
if jobSettingConf, err = j.PluginJobConf().GetConfig(coreconst.DataxJobSetting); err != nil {
jobSettingConf, _ = config.NewJSONFromString("{}")
err = nil
}
jobSettingConf.Set("username", j.Config.GetUsername())
jobSettingConf.Set("password", j.Config.GetPassword())
jobSettingConf.Set("url", j.Config.GetURL())
if j.Querier, err = j.handler.Querier(name, jobSettingConf); err != nil {
return errors.Wrapf(err, "Querier fail")
}
timeoutCtx, cancel := context.WithTimeout(context.Background(), 1*time.Second)
defer cancel()
err = j.Querier.PingContext(timeoutCtx)
if err != nil {
return errors.Wrapf(err, "PingContext fail")
}
return
}
// Destroy Destruction
func (j *Job) Destroy(ctx context.Context) (err error) {
if j.Querier != nil {
err = j.Querier.Close()
}
return errors.Wrapf(err, "Close fail")
}
func (j *Job) fetchMin(ctx context.Context, splitTable database.Table) (c element.Column, err error) {
minHandler := database.NewBaseFetchHandler(func() (element.Record, error) {
return element.NewDefaultRecord(), nil
}, func(r element.Record) (err error) {
c, err = r.GetByIndex(0)
return nil
})
minParam := j.handler.MinParam(j.Config, splitTable)
if err = j.Querier.FetchRecord(ctx, minParam, minHandler); err != nil {
err = errors.Wrapf(err, "FetchTableWithParam fail")
return
}
return
}
func (j *Job) fetchMax(ctx context.Context, splitTable database.Table) (c element.Column, err error) {
maxHandler := database.NewBaseFetchHandler(func() (element.Record, error) {
return element.NewDefaultRecord(), nil
}, func(r element.Record) error {
c, err = r.GetByIndex(0)
return nil
})
maxParam := j.handler.MaxParam(j.Config, splitTable)
if err = j.Querier.FetchRecord(ctx, maxParam, maxHandler); err != nil {
err = errors.Wrapf(err, "FetchTableWithParam fail")
return
}
return
}
// Split Division
func (j *Job) Split(ctx context.Context, number int) (configs []*config.JSON, err error) {
if len(j.Config.GetQuerySQL()) > 0 {
for _, v := range j.Config.GetQuerySQL() {
conf := j.PluginJobConf().CloneConfig()
conf.Remove("querySql")
_ = conf.Set("querySql.0", v)
configs = append(configs, conf)
}
return
}
if j.Config.GetSplitConfig().Key == "" || number == 1 {
return []*config.JSON{j.PluginJobConf().CloneConfig()}, nil
}
if j.Config.GetSplitConfig().Range.Type == "" {
return j.split(ctx, number, j)
}
conf := j.Config.GetSplitConfig()
return j.split(ctx, number, &conf)
}
func (j *Job) split(ctx context.Context, number int, fetcher splitRangeFetcher) (configs []*config.JSON, err error) {
var splitTable database.Table
log.Debugf("jobID: %v start to split", j.JobID())
param := j.handler.SplitParam(j.Config, j.Querier)
if splitTable, err = j.Querier.FetchTableWithParam(ctx, param); err != nil {
err = errors.Wrapf(err, "FetchTableWithParam fail")
return
}
log.Debugf("jobID: %v fetch split table end", j.JobID())
var minColumn element.Column
if minColumn, err = fetcher.fetchMin(ctx, splitTable); err != nil {
err = errors.Wrapf(err, "fetchMin fail")
return
}
log.Debugf("jobID: %v split fetchMin = %v", j.JobID(), minColumn)
var maxColumn element.Column
if maxColumn, err = fetcher.fetchMax(ctx, splitTable); err != nil {
err = errors.Wrapf(err, "fetchMax fail")
return
}
log.Debugf("jobID: %v split fetchMax = %v", j.JobID(), maxColumn)
ranges, err := split(minColumn, maxColumn, number,
j.Config.GetSplitConfig().TimeAccuracy, splitTable.Fields()[0])
if err != nil {
err = errors.Wrapf(err, "split fail")
return
}
for _, r := range ranges {
clone := j.PluginJobConf().CloneConfig()
_ = clone.Set("split.range", r)
where := r.where
if j.Config.GetWhere() != "" {
where = fmt.Sprintf("(%s) and (%s)", j.Config.GetWhere(), r.where)
}
_ = clone.Set("where", where)
configs = append(configs, clone)
}
return
}