forked from log4js-node/log4js-node
/
dateFile.js
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/
dateFile.js
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const streams = require('streamroller');
const os = require('os');
const eol = os.EOL;
/**
* File appender that rolls files according to a date pattern.
* @filename base filename.
* @pattern the format that will be added to the end of filename when rolling,
* also used to check when to roll files - defaults to '.yyyy-MM-dd'
* @layout layout function for log messages - defaults to basicLayout
* @timezoneOffset optional timezone offset in minutes - defaults to system local
*/
function appender(
filename,
pattern,
layout,
options,
timezoneOffset
) {
// the options for file appender use maxLogSize, but the docs say any file appender
// options should work for dateFile as well.
options.maxSize = options.maxLogSize;
let alive = true;
const logFile = new streams.DateRollingFileStream(
filename,
pattern,
options
);
logFile.on('error', (err) => {
alive = false;
console.error('log4js.dateFileAppender - Writing to file %s, error happened ', filename, err); //eslint-disable-line
});
logFile.on("drain", () => {
process.emit("log4js:pause", false);
});
const app = function (logEvent) {
if (!alive) {
return;
}
if (!logFile.write(layout(logEvent, timezoneOffset) + eol, "utf8")) {
process.emit("log4js:pause", true);
}
};
app.shutdown = function (complete) {
logFile.write('', 'utf-8', () => {
logFile.end(complete);
});
};
return app;
}
function configure(config, layouts) {
let layout = layouts.basicLayout;
if (config.layout) {
layout = layouts.layout(config.layout.type, config.layout);
}
if (!config.alwaysIncludePattern) {
config.alwaysIncludePattern = false;
}
return appender(
config.filename,
config.pattern,
layout,
config,
config.timezoneOffset
);
}
module.exports.configure = configure;