hoteas
7f7b585ffb
- 在应用程序中新增对达梦数据库（DM）的配置和连接支持 - 实现 SetDmDB 函数以配置达梦数据库连接 - 更新数据库操作逻辑，支持达梦特有的 SQL 语法和功能 - 在相关文件中添加达梦数据库的处理逻辑，包括表创建、数据插入和查询 - 更新 go.mod 和 go.sum 文件以引入达梦数据库驱动 - 增强文档，详细说明达梦数据库的配置和使用方法
125 lines
2.5 KiB
Go
125 lines
2.5 KiB
Go
/*
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* Copyright (c) 2000-2018, 达梦数据库有限公司.
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* All rights reserved.
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*/
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package dm
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import (
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"fmt"
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"os"
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"strconv"
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"strings"
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"time"
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"gitee.com/chunanyong/dm/util"
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)
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const (
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MAX_FILE_SIZE = 100 * 1024 * 1024
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FLUSH_SIZE = 32 * 1024
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)
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type goRun interface {
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doRun()
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}
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type logWriter struct {
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flushQueue chan []byte
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date string
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logFile *os.File
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flushFreq int
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filePath string
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filePrefix string
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buffer *Dm_build_0
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}
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func (lw *logWriter) doRun() {
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defer func() {
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lw.beforeExit()
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lw.closeCurrentFile()
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}()
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i := 0
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for {
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var ibytes []byte
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select {
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case ibytes = <-lw.flushQueue:
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if LogLevel != LOG_OFF {
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if i == LogFlushQueueSize {
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lw.doFlush(lw.buffer)
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i = 0
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} else {
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lw.buffer.Dm_build_26(ibytes, 0, len(ibytes))
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i++
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}
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}
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case <-time.After(time.Duration(LogFlushFreq) * time.Millisecond):
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if LogLevel != LOG_OFF && lw.buffer.Dm_build_5() > 0 {
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lw.doFlush(lw.buffer)
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i = 0
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}
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}
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}
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}
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func (lw *logWriter) doFlush(buffer *Dm_build_0) {
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if lw.needCreateNewFile() {
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lw.closeCurrentFile()
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lw.logFile = lw.createNewFile()
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}
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if lw.logFile != nil {
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buffer.Dm_build_20(lw.logFile, buffer.Dm_build_5())
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}
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}
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func (lw *logWriter) closeCurrentFile() {
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if lw.logFile != nil {
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lw.logFile.Close()
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lw.logFile = nil
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}
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}
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func (lw *logWriter) createNewFile() *os.File {
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lw.date = time.Now().Format("2006-01-02")
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fileName := lw.filePrefix + "_" + lw.date + "_" + strconv.Itoa(time.Now().Nanosecond()) + ".log"
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lw.filePath = LogDir
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if len(lw.filePath) > 0 {
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if _, err := os.Stat(lw.filePath); err != nil {
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os.MkdirAll(lw.filePath, 0755)
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}
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if _, err := os.Stat(lw.filePath + fileName); err != nil {
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logFile, err := os.Create(lw.filePath + fileName)
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if err != nil {
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fmt.Println(err)
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return nil
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}
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return logFile
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}
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}
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return nil
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}
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func (lw *logWriter) needCreateNewFile() bool {
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now := time.Now().Format("2006-01-02")
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fileInfo, err := lw.logFile.Stat()
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return now != lw.date || err != nil || lw.logFile == nil || fileInfo.Size() > int64(MAX_FILE_SIZE)
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}
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func (lw *logWriter) beforeExit() {
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close(lw.flushQueue)
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var ibytes []byte
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for ibytes = <-lw.flushQueue; ibytes != nil; ibytes = <-lw.flushQueue {
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lw.buffer.Dm_build_26(ibytes, 0, len(ibytes))
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if lw.buffer.Dm_build_5() >= LogBufferSize {
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lw.doFlush(lw.buffer)
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}
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}
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if lw.buffer.Dm_build_5() > 0 {
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lw.doFlush(lw.buffer)
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}
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}
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func (lw *logWriter) WriteLine(msg string) {
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var b = []byte(strings.TrimSpace(msg) + util.LINE_SEPARATOR)
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lw.flushQueue <- b
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}
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