91 lines
2.0 KiB
JavaScript
91 lines
2.0 KiB
JavaScript
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"use strict";
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var streams = require('streamroller')
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, layouts = require('../layouts')
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, path = require('path')
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, os = require('os')
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, eol = os.EOL || '\n'
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, openFiles = [];
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//close open files on process exit.
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process.on('exit', function() {
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openFiles.forEach(function (file) {
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file.end();
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});
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});
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/**
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* File appender that rolls files according to a date pattern.
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* @filename base filename.
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* @pattern the format that will be added to the end of filename when rolling,
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* also used to check when to roll files - defaults to '.yyyy-MM-dd'
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* @layout layout function for log messages - defaults to basicLayout
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* @timezoneOffset optional timezone offset in minutes - defaults to system local
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*/
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function appender(filename, pattern, layout, options, timezoneOffset) {
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layout = layout || layouts.basicLayout;
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var logFile = new streams.DateRollingFileStream(
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filename,
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pattern,
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options
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);
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openFiles.push(logFile);
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return function(logEvent) {
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logFile.write(layout(logEvent, timezoneOffset) + eol, "utf8");
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};
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}
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function configure(config, options) {
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var layout;
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if (config.layout) {
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layout = layouts.layout(config.layout.type, config.layout);
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}
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if (!config.alwaysIncludePattern) {
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config.alwaysIncludePattern = false;
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}
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if (options && options.cwd && !config.absolute) {
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config.filename = path.join(options.cwd, config.filename);
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}
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return appender(
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config.filename,
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config.pattern,
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layout,
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config,
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config.timezoneOffset
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);
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}
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function shutdown(cb) {
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var completed = 0;
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var error;
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var complete = function(err) {
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error = error || err;
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completed++;
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if (completed >= openFiles.length) {
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cb(error);
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}
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};
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if (!openFiles.length) {
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return cb();
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}
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openFiles.forEach(function(file) {
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if (!file.write(eol, "utf-8")) {
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file.once('drain', function() {
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file.end(complete);
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});
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} else {
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file.end(complete);
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}
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});
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}
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exports.appender = appender;
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exports.configure = configure;
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exports.shutdown = shutdown;
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