Working date rolling file appender.
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lib/appenders/dateFile.js
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49
lib/appenders/dateFile.js
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var streams = require('../streams'),
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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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*/
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function appender(filename, pattern, layout) {
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layout = layout || layouts.basicLayout;
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var logFile = new streams.BufferedWriteStream(new streams.DateRollingFileStream(filename, pattern));
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openFiles.push(logFile);
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return function(logEvent) {
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logFile.write(layout(logEvent) + 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 (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(config.filename, config.pattern, layout);
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}
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exports.appender = appender;
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exports.configure = configure;
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98
test/dateFileAppender-test.js
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test/dateFileAppender-test.js
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var vows = require('vows'),
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assert = require('assert'),
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path = require('path'),
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fs = require('fs'),
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log4js = require('../lib/log4js');
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function removeFile(filename) {
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return function() {
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fs.unlink(path.join(__dirname, filename), function(err) {
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if (err) {
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console.log("Could not delete ", filename, err);
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}
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});
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};
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}
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vows.describe('../lib/appenders/dateFile').addBatch({
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'appender': {
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'adding multiple dateFileAppenders': {
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topic: function () {
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var listenersCount = process.listeners('exit').length,
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dateFileAppender = require('../lib/appenders/dateFile'),
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count = 5,
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logfile;
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while (count--) {
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logfile = path.join(__dirname, 'datefa-default-test' + count + '.log');
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log4js.addAppender(dateFileAppender.appender(logfile));
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}
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return listenersCount;
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},
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teardown: function() {
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removeFile('datefa-default-test0.log')();
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removeFile('datefa-default-test1.log')();
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removeFile('datefa-default-test2.log')();
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removeFile('datefa-default-test3.log')();
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removeFile('datefa-default-test4.log')();
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},
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'should only add one `exit` listener': function (initialCount) {
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assert.equal(process.listeners('exit').length, initialCount + 1);
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}
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},
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'with default settings': {
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topic: function() {
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var that = this,
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testFile = path.join(__dirname, 'date-appender-default.log'),
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appender = require('../lib/appenders/dateFile').appender(testFile),
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logger = log4js.getLogger('default-settings');
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log4js.clearAppenders();
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log4js.addAppender(appender, 'default-settings');
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logger.info("This should be in the file.");
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setTimeout(function() {
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fs.readFile(testFile, "utf8", that.callback);
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}, 100);
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},
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teardown: removeFile('date-appender-default.log'),
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'should write to the file': function(contents) {
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assert.include(contents, 'This should be in the file');
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},
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'should use the basic layout': function(contents) {
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assert.match(contents, /\[\d{4}-\d{2}-\d{2}\s\d{2}:\d{2}:\d{2}\.\d{3}\] \[INFO\] default-settings - /);
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}
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}
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}
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}).addBatch({
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'configure': {
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'with dateFileAppender': {
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topic: function() {
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var log4js = require('../lib/log4js')
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, logger;
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//this config file defines one file appender (to ./date-file-test.log)
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//and sets the log level for "tests" to WARN
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log4js.configure('test/with-dateFile.json');
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logger = log4js.getLogger('tests');
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logger.info('this should not be written to the file');
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logger.warn('this should be written to the file');
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fs.readFile(path.join(__dirname, 'date-file-test.log'), 'utf8', this.callback);
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},
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teardown: removeFile('date-file-test.log'),
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'should load appender configuration from a json file': function(err, contents) {
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assert.include(contents, 'this should be written to the file\n');
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assert.equal(contents.indexOf('this should not be written to the file'), -1);
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}
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}
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}
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}).exportTo(module);
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17
test/with-dateFile.json
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17
test/with-dateFile.json
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{
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"appenders": [
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{
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"category": "tests",
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"type": "dateFile",
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"filename": "test/date-file-test.log",
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"pattern": "-from-MM-dd",
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"layout": {
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"type": "messagePassThrough"
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}
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}
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],
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"levels": {
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"tests": "WARN"
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}
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}
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