log4js-logstash-tcp
Version:
This is a copy of the logstashUDP appender but instead sending via UDP send via TCP to avoid the maximum 64k bytes message size with the logstashUDP appender.
451 lines (437 loc) • 19.3 kB
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<h1><a href="../index.html">All files</a> / <a href="index.html">log4js-logstash-tcp</a> index.js</h1>
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<span class="cline-any cline-neutral"> </span></td><td class="text"><pre class="prettyprint lang-js">'use strict';
const TcpConnectionPool = require("./classes/TcpConnectionPool").TcpConnectionPool;
const tcpConnectionPool = new TcpConnectionPool();
let apm = false;
try {
apm = require('elastic-apm-node');
} catch(e) {
// ignore APM if it's not loaded
}
function sendLog(host, port, logObject) {
tcpConnectionPool.send(host, port, logObject);
}
function logstashTCP(config, layout) {
const type = config.logType ? <span class="branch-0 cbranch-no" title="branch not covered" >config.logType </span>: config.category;
<span class="missing-if-branch" title="if path not taken" >I</span>if (!config.fields) {
<span class="cstat-no" title="statement not covered" > config.fields = {};</span>
}
function checkArgs(argsValue, logUnderFields) {
<span class="missing-if-branch" title="else path not taken" >E</span>if ((!argsValue) || (<span class="branch-1 cbranch-no" title="branch not covered" >argsValue === 'both')</span>) {
return true;
}
<span class="cstat-no" title="statement not covered" > if (logUnderFields && (argsValue === 'fields')) {</span>
<span class="cstat-no" title="statement not covered" > return true;</span>
}
<span class="cstat-no" title="statement not covered" > return (!logUnderFields) && (argsValue === 'direct');</span>
}
function log(loggingEvent) {
let currentAPMTransaction = false
<span class="missing-if-branch" title="if path not taken" >I</span>if(apm && <span class="branch-1 cbranch-no" title="branch not covered" >apm.currentTransaction)</span> {
<span class="cstat-no" title="statement not covered" > currentAPMTransaction = apm.currentTransaction</span>
}
/*
https://gist.github.com/jordansissel/2996677
{
'message' => 'hello world',
'@version' => '1',
'@timestamp' => '2014-04-22T23:03:14.111Z',
'type' => 'stdin',
'host' => 'hello.local'
}
@timestamp is the ISO8601 high-precision timestamp for the event.
@version is the version number of this json schema
Every other field is valid and fine.
*/
const fields = {};
Object.keys(config.fields).forEach((key) => {
fields[key] = typeof config.fields[key] === 'function' ? <span class="branch-0 cbranch-no" title="branch not covered" >config.fields[key](loggingEvent) </span>: config.fields[key];
});
// adding context to log messages as separate fields added by logger.addContext(key, value)
if(loggingEvent.context) {
if(loggingEvent.data.length === 1 || !loggingEvent.data[1]) {
loggingEvent.data[1] = {}
}
<span class="missing-if-branch" title="else path not taken" >E</span>if(typeof loggingEvent.data[1] === 'object') {
loggingEvent.data[1] = {
...loggingEvent.context,
...loggingEvent.data[1]
}
}
}
/* eslint no-prototype-builtins:1,no-restricted-syntax:[1, "ForInStatement"] */
if (loggingEvent.data.length > 1) {
const secondEvData = loggingEvent.data[1];
<span class="missing-if-branch" title="else path not taken" >E</span>if ((secondEvData !== undefined) && (secondEvData !== null)) {
Object.keys(secondEvData).forEach((key) => {
fields[key] = secondEvData[key];
})
;
}
}
fields.level = loggingEvent.level.levelStr;
fields.category = loggingEvent.categoryName;
const logObject = {
'@version': '1',
'@timestamp': (new Date(loggingEvent.startTime)).toISOString(),
// this allows to show logs generated by logging events together with APM events
...(currentAPMTransaction.ids || {}),
type: type,
message: layout(loggingEvent)//.data[0]
};
<span class="missing-if-branch" title="else path not taken" >E</span>if (checkArgs(config.args, false)) {
Object.keys(fields).forEach((key) => {
logObject[key] = fields[key];
});
}
sendLog(config.host, config.port, logObject);
}
log.shutdown = function (cb) {
tcpConnectionPool.close(cb);
};
return log;
}
function configure(config, layouts) {
let layout = layouts.dummyLayout;
<span class="missing-if-branch" title="if path not taken" >I</span>if (config.layout) {
<span class="cstat-no" title="statement not covered" > layout = layouts.layout(config.layout.type, config.layout);</span>
}
<span class="missing-if-branch" title="if path not taken" >I</span>if(!layout) {
<span class="cstat-no" title="statement not covered" > throw new Error('wrong and/or unknown layout chosen in log4js configuration', config.layout);</span>
}
return logstashTCP(config, layout);
}
module.exports.configure = configure;
</pre></td></tr></table></pre>
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