110 lines
2.5 KiB
JavaScript
110 lines
2.5 KiB
JavaScript
var path = require('path');
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var datadefinition;
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var filepath;
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var counterpath;
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var data = {};
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var fs = require('fs'),
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bite_size = 4096,
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save_interval_or_retry,
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filereadbytes,
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tempdata = "",
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fd;
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function init(file,logic,idle){
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delete require.cache[require.resolve('../../config/fromlog/datadefinitions/' + logic)];
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datadefinition = require('../../config/fromlog/datadefinitions/' + logic);
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save_interval_or_retry = idle;
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filepath = path.resolve(__dirname, '../../config/fromlog/logs/' + file);
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fs.readFile(filepath,function(err, content){
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if (err){
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filereadbytes = 0;
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}else{
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filereadbytes = parseInt(content);
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if (isNaN(filereadbytes)){
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filereadbytes = 0;
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}
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}
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var oldfilereadbytes = filereadbytes;
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setInterval(function(){
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if (filereadbytes != oldfilereadbytes){
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counterpath = path.resolve(__dirname, '../../program-data/fromlog/counters/' + file);
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fs.writeFile(counterpath, filereadbytes.toString(),function(err){});
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oldfilereadbytes = filereadbytes;
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}
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}, save_interval_or_retry);
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openandreadsome();
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});
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}
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function openandreadsome(){
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fs.open(filepath, 'r',function(err, file){
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if (err){
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return setTimeout(openandreadsome, save_interval_or_retry);
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}
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fd = file;
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fs.fstat(file, function(err, stats){
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if (err || stats.size == filereadbytes){
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return fs.close(file,function(err){
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setTimeout(openandreadsome, save_interval_or_retry);
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});
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}
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if (stats.size < filereadbytes){
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filereadbytes =0;
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}
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readsome(stats);
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});
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});
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}
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function readsome(stats) {
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fs.read(fd, Buffer.alloc(bite_size), 0, bite_size, filereadbytes, function(err, actualbytesread, buffer){
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if (err){
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return fs.close(fd,function(err){
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setTimeout(openandreadsome, save_interval_or_retry);
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});
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}
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if(actualbytesread == 0) {
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return fs.close(fd,function(err){
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setTimeout(openandreadsome, save_interval_or_retry);
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});
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}
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processsome(actualbytesread,buffer);
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readsome(stats);
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});
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}
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function processsome(actualbytesread, buff) {
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var datastring = buff.toString('utf-8', 0, actualbytesread);
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tempdata+=datastring;
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var tempdatasplit = tempdata.split(/\r\n|\r|\n/);
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for (var i = 0; i < tempdatasplit.length - 1; i++) {
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data= datadefinition.extractdatafromline(data,tempdatasplit[i]);
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}
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tempdata = tempdatasplit[tempdatasplit.length - 1];
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filereadbytes+= actualbytesread;
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}
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module.exports = {
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init: function (file,logic,idle) {
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init(file,logic,idle);
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data= datadefinition.init(data);
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},
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data: function () {
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return data;
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}
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};
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