121 lines
3.0 KiB
JavaScript
121 lines
3.0 KiB
JavaScript
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/*
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* @project: TERA
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* @version: Development (beta)
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* @license: MIT (not for evil)
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* @copyright: Yuriy Ivanov 2017-2019 [progr76@gmail.com]
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* Web: https://terafoundation.org
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* Twitter: https://twitter.com/terafoundation
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* Telegram: https://web.telegram.org/#/im?p=@terafoundation
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*/
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"use strict";
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const fs = require('fs');
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module.exports = class
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{
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constructor()
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{
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this.DBMap = {}
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}
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CheckPathDB()
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{
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var Path = GetDataPath("DB");
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CheckCreateDir(Path)
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}
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CloseDBFile(name, bdelete)
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{
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this.LastHash = undefined
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this.WasUpdate = 1
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var Item = this.DBMap[name];
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if(Item)
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{
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let bDelete = bdelete;
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let Name = name;
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fs.close(Item.fd, function (err)
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{
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if(!err)
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{
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if(bDelete)
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{
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var fname = GetDataPath("DB/" + Name);
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fs.unlink(fname, function (err)
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{
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if(err)
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ToLog(err)
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})
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}
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}
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else
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{
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ToLog(err)
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}
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})
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delete this.DBMap[name]
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}
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}
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OpenDBFile(name, bWrite, bExist)
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{
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if(bWrite && global.READ_ONLY_DB)
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{
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ToLogTrace("CANNOT WRITE - DB IN READ_ONLY MODE!!!")
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process.exit()
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}
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if(bWrite)
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CheckStartOneProcess(name + "-run")
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this.LastHash = undefined
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this.WasUpdate = 1
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var Item = this.DBMap[name];
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if(Item === undefined)
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{
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if(!this.WasCheckPathDB)
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{
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this.CheckPathDB()
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this.WasCheckPathDB = true
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}
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var fname = GetDataPath("DB/" + name);
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if(!fs.existsSync(fname))
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{
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if(bExist)
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{
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this.DBMap[name] = null
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return null;
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}
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var fd = fs.openSync(fname, "w+");
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fs.closeSync(fd)
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}
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var fd = fs.openSync(fname, "r+");
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var stat = fs.statSync(fname);
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var size = stat.size;
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Item = {name:name, fname:fname, fd:fd, size:size, FillRows:0, CountRows:0, }
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this.DBMap[name] = Item
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}
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return Item;
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}
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};
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var MapCheckProcess = {};
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var BlockDB = new module.exports();
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function CheckStartOneProcess(Name)
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{
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if(global.UpdateMode)
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return ;
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if(global.READ_ONLY_DB || MapCheckProcess[Name])
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return ;
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MapCheckProcess[Name] = 1;
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var path = GetDataPath("DB/" + Name);
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if(fs.existsSync(path))
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{
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fs.unlinkSync(path);
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}
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try
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{
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BlockDB.OpenDBFile(Name);
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}
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catch(e)
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{
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ToLog("****** DETECT START ANOTHER PROCESS for: " + Name);
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ToLogTrace("EXIT");
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process.exit();
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}
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};
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global.CheckStartOneProcess = CheckStartOneProcess;
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