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mssql.go
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mssql.go
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// Copyright 2022 iLogtail 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 mssql
import (
"fmt"
"strconv"
"strings"
mssql "github.com/denisenkom/go-mssqldb"
"github.com/alibaba/ilogtail/pkg/pipeline"
"github.com/alibaba/ilogtail/pkg/util"
"github.com/alibaba/ilogtail/plugins/input/rdb"
)
var msColumnResolverFuncMap map[string]rdb.ColumnResolverFunc = map[string]rdb.ColumnResolverFunc{
"UNIQUEIDENTIFIER": func(val string) (string, error) {
// for mssql uniqueidentifier
uniVal := new(mssql.UniqueIdentifier)
if err := uniVal.Scan([]byte(val)); err != nil {
return "", err
}
return uniVal.String(), nil
},
}
type Mssql struct {
rdb.Rdb
}
func (m *Mssql) Init(context pipeline.Context) (int, error) {
return m.Rdb.Init(context, func() error {
if m.Rdb.Limit && m.Rdb.PageSize > 0 {
m.Rdb.StateMent += fmt.Sprintf(" OFFSET ? ROW FETCH NEXT %d ROW ONLY", m.Rdb.PageSize)
}
return nil
})
}
func (m *Mssql) Description() string {
return "mssql input plugin for logtail"
}
// Address string
// DataBase string
// User string
// Password string
// PasswordPath string
// Location string
// DialTimeOutMs int
// ReadTimeOutMs int
func (m *Mssql) dsnConfig() string {
if len(m.Password) == 0 {
if len(m.PasswordPath) != 0 {
lines, err := util.ReadLines(m.PasswordPath)
if err != nil && len(lines) > 0 {
m.Password = strings.TrimSpace(lines[0])
}
}
}
// address can be one of the two below
// 127.0.0.1:1433
// 127.0.0.1
addressIPPort := strings.Split(m.Address, ":")
if len(addressIPPort) == 2 && m.Port == 0 {
m.Port, _ = strconv.Atoi(addressIPPort[1])
}
if m.Port == 0 {
m.Port = 1433
}
conn := fmt.Sprintf("server=%s;port=%d;database=%s;user id=%s;password=%s;dial timeout=%s;connection timeout=%s;encrypt=disable",
m.Address,
m.Port,
m.DataBase,
m.User,
m.Password,
fmt.Sprintf("%d", m.DialTimeOutMs/1000),
fmt.Sprintf("%d", m.ReadTimeOutMs/1000),
)
return conn
}
// Start starts the ServiceInput's service, whatever that may be
func (m *Mssql) Start(collector pipeline.Collector) error {
connStr := m.dsnConfig()
return m.Rdb.Start(collector, connStr, func() error {
return nil
}, msColumnResolverFuncMap)
}
func (m *Mssql) Collect(collector pipeline.Collector) error {
return m.Rdb.Collect(collector, msColumnResolverFuncMap)
}
// Stop stops the services and closes any necessary channels and connections
func (m *Mssql) Stop() error {
return m.Rdb.Stop()
}
func init() {
pipeline.ServiceInputs["service_mssql"] = func() pipeline.ServiceInput {
return &Mssql{
Rdb: rdb.Rdb{
ConnectionRetryTime: 3,
ConnectionRetryWaitMs: 5000,
Driver: "mssql",
Address: "127.0.0.1",
User: "root",
MaxSyncSize: 0,
DialTimeOutMs: 5000,
ReadTimeOutMs: 5000,
Port: 1433,
Shutdown: make(chan struct{}, 2),
},
}
}
}