92 lines
2.7 KiB
JavaScript
92 lines
2.7 KiB
JavaScript
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const debug = require('debug')('log4js:multiFile');
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const path = require('path');
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const fileAppender = require('./file');
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const findFileKey = (property, event) =>
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event[property] || event.context[property];
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module.exports.configure = (config, layouts) => {
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debug('Creating a multi-file appender');
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const files = new Map();
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const timers = new Map();
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function checkForTimeout(fileKey) {
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const timer = timers.get(fileKey);
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const app = files.get(fileKey);
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/* istanbul ignore else: failsafe */
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if (timer && app) {
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if (Date.now() - timer.lastUsed > timer.timeout) {
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debug('%s not used for > %d ms => close', fileKey, timer.timeout);
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clearInterval(timer.interval);
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timers.delete(fileKey);
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files.delete(fileKey);
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app.shutdown((err) => {
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if (err) {
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debug('ignore error on file shutdown: %s', err.message);
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}
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});
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}
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} else {
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// will never get here as files and timers are coupled to be added and deleted at same place
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debug('timer or app does not exist');
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}
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}
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const appender = (logEvent) => {
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const fileKey = findFileKey(config.property, logEvent);
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debug('fileKey for property ', config.property, ' is ', fileKey);
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if (fileKey) {
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let file = files.get(fileKey);
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debug('existing file appender is ', file);
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if (!file) {
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debug('creating new file appender');
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config.filename = path.join(config.base, fileKey + config.extension);
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file = fileAppender.configure(config, layouts);
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files.set(fileKey, file);
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if (config.timeout) {
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debug('creating new timer');
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timers.set(fileKey, {
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timeout: config.timeout,
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lastUsed: Date.now(),
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interval: setInterval(
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checkForTimeout.bind(null, fileKey),
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config.timeout
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),
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});
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}
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} else if (config.timeout) {
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debug('%s extending activity', fileKey);
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timers.get(fileKey).lastUsed = Date.now();
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}
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file(logEvent);
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} else {
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debug('No fileKey for logEvent, quietly ignoring this log event');
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}
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};
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appender.shutdown = (cb) => {
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let shutdownFunctions = files.size;
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if (shutdownFunctions <= 0) {
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cb();
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}
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let error;
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timers.forEach((timer, fileKey) => {
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debug('clearing timer for ', fileKey);
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clearInterval(timer.interval);
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});
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files.forEach((app, fileKey) => {
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debug('calling shutdown for ', fileKey);
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app.shutdown((err) => {
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error = error || err;
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shutdownFunctions -= 1;
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if (shutdownFunctions <= 0) {
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cb(error);
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}
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});
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});
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};
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return appender;
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};
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