Added fluent logger sample.

logging/fluent.js

@@ -0,0 +1,57 @@
+// Copyright 2016, Google, Inc.
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+'use strict';
+
+var express = require('express');
+var app = express();
+
+app.get('*', function (req, res, next) {
+  return next('oops');
+});
+
+// [START fluent]
+var structuredLogger = require('fluent-logger').createFluentSender('myapp', {
+   host: 'localhost',
+   port: 24224,
+   timeout: 3.0
+});
+
+var report = function (err, req) {
+  var payload = {
+    serviceContext: {
+      service: 'myapp',
+    },
+    message: err.stack,
+    context: {
+      httpRequest: {
+        url: req.originalUrl,
+        method: req.method,
+        referrer: req.header('Referer'),
+        userAgent: req.header('User-Agent'),
+        remoteIp: req.ip,
+        responseStatusCode: 500,
+      }
+    }
+  };
+  structuredLogger.emit('errors', payload);
+};
+
+// Handle errors (the following uses the Express framework)
+app.use(function (err, req, res) {
+  report(err, req);
+  res.status(500).send(err.response || 'Something broke!');
+});
+// [END fluent]
+
+module.exports = app;

logging/package.json

@@ -14,6 +14,8 @@
     "export": "node export.js"
   },
   "dependencies": {
+    "express": "^4.13.4",
+    "fluent-logger": "^1.1.0",
     "gcloud": "^0.30.3"
   }
 }

test/logging/fluent.test.js

@@ -0,0 +1,51 @@
+// Copyright 2015-2016, Google, Inc.
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+'use strict';
+
+var test = require('ava');
+var proxyquire = require('proxyquire').noPreserveCache();
+var request = require('supertest');
+
+test.cb('should log error', function (t) {
+  var loggerCalled = false;
+
+  var structuredLogger = {
+    emit: function (name) {
+      t.is(name, 'errors');
+      loggerCalled = true;
+    }
+  };
+
+  var app = proxyquire('../../logging/fluent.js', {
+    'fluent-logger': {
+      createFluentSender: function (name, options) {
+        t.is(name, 'myapp');
+        t.same(options, {
+          host: 'localhost',
+          port: 24224,
+          timeout: 3.0
+        });
+        return structuredLogger;
+      }
+    }
+  });
+
+  request(app)
+    .get('/')
+    .expect(500)
+    .expect(function () {
+      t.is(loggerCalled, true, 'structuredLogger.emit should have been called');
+    })
+    .end(t.end);
+});