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GELF appender can add customFields to config for every message

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This commit is contained in:
Karl Lam 2013-07-05 11:23:59 +08:00
parent be754f0c0e
commit 837d007de3
1 changed files with 21 additions and 5 deletions
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26
lib/appenders/gelf.js
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@ -34,13 +34,16 @@ levelMapping[levels.FATAL] = LOG_CRIT;
* @param hostname - hostname of the current host (default:os hostname)
* @param facility - facility to log to (default:nodejs-server)
*/
function gelfAppender (layout, host, port, hostname, facility) {
function gelfAppender (layout, host, port, hostname, facility, customFields) {
host = host || 'localhost';
port = port || 12201;
hostname = hostname || require('os').hostname();
facility = facility || 'nodejs-server';
layout = layout || layouts.messagePassThroughLayout;
var defaultCustomFields = customFields || {};
console.log(defaultCustomFields)
var client = dgram.createSocket("udp4");
@ -55,9 +58,22 @@ function gelfAppender (layout, host, port, hostname, facility) {
* @param msg
*/
function addCustomFields(loggingEvent, msg){
/* append defaultCustomFields firsts */
var keys = Object.keys(defaultCustomFields);
for (var i in keys){
var key = keys[i];
// skip _id field for graylog2, skip keys not starts with UNDERSCORE
if (!key.match(/^_/) || key === "_id") continue;
msg[key] = defaultCustomFields[key];
}
/* append custom fields per message */
var data = loggingEvent.data;
if (!Array.isArray(data) || data.length === 0) return;
var firstData = data[0];
if (!firstData['GELF']) return; // identify with GELF field defined
var keys = Object.keys(firstData);
for (var i in keys){
@ -66,9 +82,9 @@ function gelfAppender (layout, host, port, hostname, facility) {
if (!key.match(/^_/) || key === "_id") continue;
msg[key] = firstData[key];
}
loggingEvent.data.shift(); // remove the first object
//console.log('=== msg ===');
//console.log(msg);
/* the custom field object should be removed, so it will not be looged by the later appenders */
loggingEvent.data.shift();
}
function preparePacket(loggingEvent) {
@ -112,7 +128,7 @@ function configure(config) {
if (config.layout) {
layout = layouts.layout(config.layout.type, config.layout);
}
return gelfAppender(layout, config.host, config.port, config.hostname, config.facility);
return gelfAppender(layout, config.host, config.port, config.hostname, config.facility, config.customFields);
}
exports.appender = gelfAppender;