Description

This sample Node.js app allows you to:

1. Receive pushed data from Google Pub/Sub as a POST request. Example works from https://{yourDomain}/devices/_ah/push-handlers/time-series/telemetry
2. Pull data from Google Pub/Sub. Example code is commented out by default and located in api.js 
3. List all data that has been pushed or pulled from https://{yourDomain}/devices

Google Pub/Sub Overview Documentation

https://candicontrols.atlassian.net/wiki/spaces/PAR/pages/190873601/Google+Pub+Sub+Overview

Simple Setup instructions

Install Node.js.
- Optional: Install Yarn.
Install git.
Create a Google Cloud Platform project.
Install the Google Cloud SDK.
- After downloading the SDK, initialize it:
```
  gcloud init
```
Acquire local credentials for authenticating with Google Cloud Platform services:
```
gcloud beta auth application-default login
```

Clone the repository:

git clone https://github.com/your-repo.git

Change directory:
```
cd your-repo
```
Create a config.json file (copied from the config-default.json file):
```
cp config-default.json config.json
```
- Set GCLOUD_PROJECT in config.json to your Google Cloud Platform project ID.
- Set DATA_BACKEND in config.json to one of "datastore", "cloudsql", or "mongodb". Note that This example uses datastore.
Install dependencies using NPM or Yarn:
- Using NPM:
```
  npm install
```
- Using Yarn:
```
  yarn install
```
Configure the backing store:
- If DATA_BACKEND is set to "cloudsql":
  1. Create a Cloud SQL instance, and download and start the Cloud SQL proxy:
    
    Instructions for doing so: https://cloud.google.com/nodejs/getting-started/using-cloud-sql#creating_a_cloud_sql_instance
  2. Set MYSQL_USER in config.json, e.g. "my-cloudsql-username".
  3. Set MYSQL_PASSWORD in config.json, e.g. "my-cloudsql-password".
  4. Set INSTANCE_CONNECTION_NAME in config.json, e.g. "YOUR_PROJECT_ID:YOUR_REGION:YOUR_INSTANCE_ID".
  5. Run the script to setup the table:
    - Using NPM:
      npm run init-cloudsql
    - Using Yarn:
      yarn run init-cloudsql
- If DATA_BACKEND is set to "mongodb":
  1. Set MONGO_URL in config.json, e.g. "mongodb://username:password@123.45.67.890:27017".
Start the app using NPM or Yarn:
- Using NPM:
```
  npm start
```
- Using Yarn:
```
  yarn start
```
View the app at http://localhost:8080.
Stop the app by pressing Ctrl+C.
Deploy the app:
```
gcloud app deploy
```
View the deployed app at https://YOUR_PROJECT_ID.appspot.com.

candicontrols/pubSub-Node-example

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