update

lib/errors.js

@@ -2,16 +2,78 @@
 'use strict';
 
 const config = require('wild-config');
+const Gelf = require('gelf');
+const os = require('os');
+
 let bugsnag;
+let gelf;
+let loggelf;
+let component;
+let hostname;
 
 if (config.bugsnagCode) {
     bugsnag = require('bugsnag');
     bugsnag.register(config.bugsnagCode);
+} else if (config.log.gelf.enabled) {
+    component = config.log.gelf.component || 'wildduck';
+    hostname = config.log.gelf.hostname || os.hostname();
+    gelf =
+        config.log.gelf && config.log.gelf.enabled
+            ? new Gelf(config.log.gelf.options)
+            : {
+                  // placeholder
+                  emit: () => false
+              };
+
+    loggelf = message => {
+        if (typeof message === 'string') {
+            message = {
+                short_message: message
+            };
+        }
+        message = message || {};
+        message.facility = component; // facility is deprecated but set by the driver if not provided
+        message.host = hostname;
+        message.timestamp = Date.now() / 1000;
+        message._component = component;
+        Object.keys(message).forEach(key => {
+            if (!message[key]) {
+                delete message[key];
+            }
+        });
+        gelf.emit('gelf.log', message);
+    };
 }
 
 module.exports.notify = (...args) => {
     if (bugsnag) {
         bugsnag.notify(...args);
+    } else if (gelf) {
+        let err = args[0] || {};
+        let extra = args[1] || {};
+
+        let message = {
+            short_message: component.toUpperCase() + ' [Exception] ' + (err.message || ''),
+            full_message: err.stack,
+            _exception: 'yes',
+            _error: err.message
+        };
+
+        Object.keys(err).forEach(key => {
+            let vKey = '_' + key;
+            if (!message[vKey]) {
+                message[vKey] = (err[key] || '').toString().trim();
+            }
+        });
+
+        Object.keys(extra).forEach(key => {
+            let vKey = '_' + key;
+            if (!message[vKey]) {
+                message[vKey] = (err[key] || '').toString().trim();
+            }
+        });
+
+        loggelf(message);
     } else {
         console.error(...args);
     }