Tone Analyzer Node.js Starter Application

The IBM Watson Tone Analyzer service is a cognitive linguistic analysis service that detects three types of tones from written text: emotions, social tendencies, and writing style. Emotions identified include things like anger, fear, joy, sadness, and disgust. Identified social tendencies include things from the Big Five personality traits used by some psychologists. These include openness, conscientiousness, extraversion, agreeableness, and neuroticism. Identified writing styles include confident, analytical, and tentative.

Give it a try! Click the button below to fork into IBM DevOps Services and deploy your own copy of this application on Bluemix.

Getting Started

1. Create a Bluemix Account

Sign up in Bluemix, or use an existing account. Watson Beta or Experimental Services are free to use.

2. Download and install the Cloud-foundry CLI tool

3. Edit the manifest.yml file and change the <application-name> to something unique.

applications:
- services:
- tone-analyzer-service
name: <application-name>
command: node app.js
path: .
memory: 256M

The name you use will determinate your application url initially, e.g. <application-name>.mybluemix.net.

4. Connect to Bluemix in the command line tool

$ cf api https://api.ng.bluemix.net
$ cf login -u <your user ID>

5. Create the Tone Analyzer Service in Bluemix

$ cf create-service tone_analyzer beta tone-analyzer-service

6. Push it live!

$ cf push

See the full Getting Started documentation for more details, including code snippets and references.

Running locally

The application uses Node.js and npm.

1. Copy the credentials from your tone-analyzer-service service in Bluemix to app.js. To see the credentials, use:

   $ cf env <application-name>

   Example output:

   System-Provided:
   {
   "VCAP_SERVICES": {
     "tone_analyzer": [{
         "credentials": {
           "url": "<url>",
           "password": "<password>",
           "username": "<username>"
         },
       "label": "tone_analyzer",
       "name": "tone-analyzer-service",
       "plan": "beta"
    }]
   }
   }

   You need to copy username, password and url.

2. Install Node.js

3. Go to the project folder in a terminal and run: npm install

4. Start the application

5. node app.js

6. Go to http://localhost:3000

Troubleshooting

To troubleshoot your Bluemix application, use the logs. To see the logs, run:

$ cf logs <application-name> --recent

License

This sample code is licensed under Apache 2.0. Full license text is available in LICENSE.

Contributing

See CONTRIBUTING.

Open Source @ IBM

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