nodejs logging

catalogue/server.js

@@ -11,6 +11,17 @@ const mongoClient = require('mongodb').MongoClient;
 const mongoObjectID = require('mongodb').ObjectID;
 const bodyParser = require('body-parser');
 const express = require('express');
+const pino = require('pino');
+const expPino = require('express-pino-logger');
+
+const logger = pino({
+    level: 'info',
+    prettyPrint: false,
+    useLevelLabels: true
+});
+const expLogger = expPino({
+    logger: logger
+});
 
 // MongoDB
 var db;
@@ -19,6 +30,8 @@ var mongoConnected = false;
 
 const app = express();
 
+app.use(expLogger);
+
 app.use((req, res, next) => {
     res.set('Timing-Allow-Origin', '*');
     res.set('Access-Control-Allow-Origin', '*');
@@ -42,10 +55,11 @@ app.get('/products', (req, res) => {
         collection.find({}).toArray().then((products) => {
             res.json(products);
         }).catch((e) => {
-            console.log('ERROR', e);
+            req.log.error('ERROR', e);
             res.status(500).send(e);
         });
     } else {
+        req.log.error('database not available');
         res.status(500).send('database not avaiable');
     }
 });
@@ -54,17 +68,18 @@ app.get('/products', (req, res) => {
 app.get('/product/:sku', (req, res) => {
     if(mongoConnected) {
         collection.findOne({sku: req.params.sku}).then((product) => {
-            console.log('product', product);
+            req.log.info('product', product);
             if(product) {
                 res.json(product);
             } else {
                 res.status(404).send('SKU not found');
             }
         }).catch((e) => {
-            console.log('ERROR', e);
+            req.log.error('ERROR', e);
             res.status(500).send(e);
         });
     } else {
+        req.log.error('database not available');
         res.status(500).send('database not available');
     }
 });
@@ -75,10 +90,11 @@ app.get('/products/:cat', (req, res) => {
         collection.find({ categories: req.params.cat }).sort({ name: 1 }).toArray().then((products) => {
             res.json(products);
         }).catch((e) => {
-            console.log('ERROR', e);
+            req.log.error('ERROR', e);
             res.status(500).send(e);
         });
     } else {
+        req.log.error('database not available');
         res.status(500).send('database not avaiable');
     }
 });
@@ -89,10 +105,11 @@ app.get('/categories', (req, res) => {
         collection.distinct('categories').then((categories) => {
             res.json(categories);
         }).catch((e) => {
-            console.log('ERROR', e);
+            req.log.error('ERROR', e);
             res.status(500).send(e);
         });
     } else {
+        req.log.error('database not available');
         res.status(500).send('database not available');
     }
 });
@@ -103,10 +120,11 @@ app.get('/search/:text', (req, res) => {
         collection.find({ '$text': { '$search': req.params.text }}).toArray().then((hits) => {
             res.json(hits);
         }).catch((e) => {
-            console.log('ERROR', e);
+            req.log.error('ERROR', e);
             res.status(500).send(e);
         });
     } else {
+        req.log.error('database not available');
         res.status(500).send('database not available');
     }
 });
@@ -114,25 +132,26 @@ app.get('/search/:text', (req, res) => {
 // set up Mongo
 function mongoConnect() {
     return new Promise((resolve, reject) => {
-    var mongoURL = process.env.MONGO_URL || 'mongodb://mongodb:27017/catalogue';
-    mongoClient.connect(mongoURL, (error, _db) => {
-        if(error) {
-            reject(error);
-        } else {
-            db = _db;
-            collection = db.collection('products');
-            resolve('connected');
-        }
+        var mongoURL = process.env.MONGO_URL || 'mongodb://mongodb:27017/catalogue';
+        mongoClient.connect(mongoURL, (error, _db) => {
+            if(error) {
+                reject(error);
+            } else {
+                db = _db;
+                collection = db.collection('products');
+                resolve('connected');
+            }
+        });
     });
-});
 }
 
+// mongodb connection retry loop
 function mongoLoop() {
     mongoConnect().then((r) => {
         mongoConnected = true;
-        console.log('MongoDB connected');
+        logger.info('MongoDB connected');
     }).catch((e) => {
-        console.error('ERROR', e);
+        logger.error('ERROR', e);
         setTimeout(mongoLoop, 2000);
     });
 }
@@ -142,5 +161,6 @@ mongoLoop();
 // fire it up!
 const port = process.env.CATALOGUE_SERVER_PORT || '8080';
 app.listen(port, () => {
-    console.log('Started on port', port);
+    logger.info('Started on port', port);
 });
+