Switch CloudSQL sample to 2nd gen. Added unit tests. (#153)

* Switch CloudSQL sample to 2nd gen. Add units tests.

* Fix typo.

appengine/cloudsql/README.md

@@ -1,40 +1,89 @@
 # Node.js Cloud SQL sample on Google App Engine
 
-This sample demonstrates how to use [Cloud SQL](https://cloud.google.com/sql/)
-on [Google App Engine Managed VMs](https://cloud.google.com/appengine).
+This sample demonstrates how to use [Google Cloud SQL][sql] (or any other SQL
+server) on [Google App Engine Flexible][flexible].
 
 ## Setup
 
 Before you can run or deploy the sample, you will need to do the following:
 
-1. Create a Cloud SQL instance. You can do this from the [Google Developers Console](https://console.developers.google.com)
-or via the [Cloud SDK](https://cloud.google.com/sdk). To create it via the SDK
-use the following command:
+1. Create a [Second Generation Cloud SQL][gen] instance. You can do this from
+the [Cloud Console][console] or via the [Cloud SDK][sdk]. To create it via the
+SDK use the following command:
 
-        gcloud sql instances create [your-instance-name] \
-          --assign-ip \
-          --authorized-networks 0.0.0.0/0 \
-          --tier D0
+        gcloud sql instances create [YOUR_INSTANCE_NAME] \
+            --activation-policy=ALWAYS \
+            --tier=db-n1-standard-1
+
+    where `[YOUR_INSTANCE_NAME]` is a name of your choice.
+
+1. Set the root password on your Cloud SQL instance:
+
+        gcloud sql instances set-root-password [YOUR_INSTANCE_NAME] --password [YOUR_INSTANCE_ROOT_PASSWORD]
+
+    where `[YOUR_INSTANCE_NAME]` is the name you chose in step 1 and
+    `[YOUR_INSTANCE_ROOT_PASSWORD]` is a password of your choice.
+
+1. Create a [Service Account][service] for your project. You will use this
+service account to connect to your Cloud SQL instance locally.
+
+1. Download and install the [Cloud SQL Proxy][proxy].
+
+1. [Start the proxy][start] to allow connecting to your instance from your local
+machine:
+
+        cloud_sql_proxy \
+            -dir /cloudsql \
+            -instances=[YOUR_INSTANCE_CONNECTION_NAME] \
+            -credential_file=PATH_TO_YOUR_SERVICE_ACCOUNT_JSON
+
+    where `[YOUR_INSTANCE_CONNECTION_NAME]` is the connection name of your
+    instance on its Overview page in the Google Cloud Platform Console, or use
+    `[YOUR_PROJECT_ID]:[YOUR_REGION]:[YOUR_INSTANCE_NAME]`.
+
+1. Use the MySQL command line tools (or a management tool of your choice) to
+create a [new user][user] and [database][database] for your application:
+
+        mysql --socket [YOUR_SOCKET_PATH] -u root -p
+          mysql> create database YOUR_DATABASE;
+          mysql> create user 'YOUR_USER'@'%' identified by 'PASSWORD';
+          mysql> grant all on YOUR_DATABASE.* to 'YOUR_USER'@'%';
+
+    where `[YOUR_SOCKET_PATH]` is that socket opened by the proxy. This path was
+    printed to the console when you started the proxy, and is of the format:
+    `/[DIR]/[YOUR_PROJECT_ID]:[YOUR_REGION]:[YOUR_INSTANCE_NAME]`.
+
+1. Set the `MYSQL_USER`, `MYSQL_PASSWORD`, `MYSQL_SOCKET_PATH`, and
+`MYSQL_DATABASE` environment variables. This allows the app to connect to your
+Cloud SQL instance through the proxy.
 
-1. Create a new user and database for the application. The easiest way to do
-this is via the [Google Developers Console](https://console.developers.google.com/project/_/sql/instances/example-instance2/access-control/users).
-Alternatively, you can use MySQL tools such as the command line client or
-workbench.
 1. Update the values in in `app.yaml` with your instance configuration.
-1. Finally, run `create_tables.js` to ensure that the database is properly
+
+1. Finally, run `createTables.js` to ensure that the database is properly
 configured and to create the tables needed for the sample.
 
 ## Running locally
 
-Refer to the [appengine/README.md](../README.md) file for instructions on
-running and deploying.
+Refer to the [top-level README](../README.md) for instructions on running and deploying.
 
-To run locally, set the environment variables via your shell before running the
-sample:
+It's recommended to follow the instructions above to run the Cloud SQL proxy.
+You will need to set the following environment variables via your shell before
+running the sample:
 
-    export MYSQL_HOST=<your-cloudsql-host>
-    export MYSQL_USER=<your-cloudsql-user>
-    export MYSQL_PASSWORD=<your-cloudsql-password>
-    export MYSQL_DATABASE=<your-cloudsql-database>
+    export MYSQL_USER="YOUR_USER"
+    export MYSQL_PASSWORD="YOUR_PASSWORD"
+    export MYSQL_SOCKET_PATH="YOUR_SOCKET_PATH"
+    export MYSQL_DATABASE="YOUR_DATABASE"
     npm install
     npm start
+
+[sql]: https://cloud.google.com/sql/
+[flexible]: https://cloud.google.com/appengine
+[gen]: https://cloud.google.com/sql/docs/create-instance
+[console]: https://console.developers.google.com
+[sdk]: https://cloud.google.com/sdk
+[service]: https://cloud.google.com/sql/docs/external#createServiceAccount
+[proxy]: https://cloud.google.com/sql/docs/external#install
+[start]: https://cloud.google.com/sql/docs/external#6_start_the_proxy
+[user]: https://cloud.google.com/sql/docs/create-user
+[database]: https://cloud.google.com/sql/docs/create-database

appengine/cloudsql/app.yaml

@@ -17,11 +17,18 @@ vm: true
 
 # [START env]
 env_variables:
-  # Replace user, password, and host with the values obtained when
-  # configuring your Cloud SQL instance.
-  MYSQL_HOST: <your-cloudsql-host>
-  MYSQL_USER: <your-cloudsql-user>
-  MYSQL_PASSWORD: <your-cloudsql-password>
-  MYSQL_DATABASE: <your-cloudsql-database>
+  MYSQL_USER: YOUR_USER
+  MYSQL_PASSWORD: YOUR_PASSWORD
+  MYSQL_DATABASE: YOUR_DATABASE
+  # This path was printed to the console when you started the proxy, and is of
+  # the format: `/[DIR]/[YOUR_PROJECT_ID]:[YOUR_REGION]:[YOUR_INSTANCE_NAME]`
+  MYSQL_SOCKET_PATH: YOUR_SOCKET_PATH
 # [END env]
+
+# [START cloudsql_settings]
+beta_settings:
+  # The connection name of your instance on its Overview page in the Google
+  # Cloud Platform Console, or use `[YOUR_PROJECT_ID]:[YOUR_REGION]:[YOUR_INSTANCE_NAME]`
+  cloud_sql_instances: YOUR_INSTANCE_CONNECTION_NAME
+# [END cloudsql_settings]
 # [END app_yaml]

appengine/cloudsql/createTables.js

@@ -0,0 +1,83 @@
+// 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.
+
+// [START createTables]
+'use strict';
+
+// [START setup]
+var mysql = require('mysql');
+var prompt = require('prompt');
+// [END setup]
+
+// [START createTable]
+var SQL_STRING = 'CREATE TABLE `visits` (\n' +
+  '  `id` INT UNSIGNED NOT NULL AUTO_INCREMENT,\n' +
+  '  `timestamp` DATETIME NULL,\n' +
+  '  `userIp` VARCHAR(46) NULL,\n' +
+  '  PRIMARY KEY (`id`)\n' +
+  ');';
+
+/**
+ * Create the "visits" table.
+ *
+ * @param {object} connection A mysql connection object.
+ * @param {function} callback The callback function.
+ */
+function createTable (connection, callback) {
+  connection.query(SQL_STRING, callback);
+}
+// [END createTable]
+
+// [START getConnection]
+var FIELDS = ['socketPath', 'user', 'password', 'database'];
+
+/**
+ * Ask the user for connection configuration and create a new connection.
+ *
+ * @param {function} callback The callback function.
+ */
+function getConnection (callback) {
+  prompt.start();
+  prompt.get(FIELDS, function (err, config) {
+    if (err) {
+      return callback(err);
+    }
+
+    return callback(null, mysql.createConnection({
+      user: config.user,
+      password: config.password,
+      socketPath: config.socketPath,
+      database: config.database
+    }));
+  });
+}
+// [END getConnection]
+
+// [START main]
+getConnection(function (err, connection) {
+  console.log(err, !!connection);
+  if (err) {
+    return console.error(err);
+  }
+  createTable(connection, function (err, result) {
+    console.log(err, !!result);
+    if (err) {
+      return console.error(err);
+    }
+    console.log(result);
+    connection.end();
+  });
+});
+// [END main]
+// [END createTables]

appengine/cloudsql/package.json

@@ -8,14 +8,9 @@
   "engines": {
     "node": "~4.2"
   },
-  "scripts": {
-    "start": "node app.js",
-    "monitor": "nodemon app.js",
-    "deploy": "gcloud app deploy"
-  },
   "dependencies": {
-    "express": "^4.13.4",
-    "mysql": "^2.10.2",
-    "prompt": "^0.2.14"
+    "express": "^4.14.0",
+    "mysql": "^2.11.1",
+    "prompt": "^1.0.0"
   }
 }