Use Swift to interpret unstructured data from Hacker News
This code pattern is a sample application that uses Watson Natural Language Understanding service to analyze the contents of trending news articles on Hackernews to give information about the concepts, entities, categories, keywords, sentiment, emotion etc. about the news article.
- The user deploys the application to IBM Cloud.
- Application loads the data from the Hackernews API.
- The user interacts with the application UI using their browser.
- When the user performs any action, UI calls the server application API which uses the Watson NLU service to analyze the respective news article.
- Watson Natural Language Understanding: An IBM Cloud service that can analyze text to extract meta-data from content such as concepts, entities, keywords, categories, sentiment, emotion, relations, semantic roles, using natural language understanding.
- Artificial Intelligence: Artificial intelligence can be applied to disparate solution spaces to deliver disruptive technologies.
Deploying the Application to IBM Cloud
You can deploy the application by using the
Deploy to IBM Cloud button or via the
IBM Cloud CLI.
Deploy to IBM Cloud button
Clicking on the button below creates a IBM Cloud DevOps Toolchain and deploys this application to IBM Cloud. The
manifest.yml file included in the repo is parsed to obtain the name of the application, configuration details, and the list of services that should be provisioned.
Once deployment to IBM Cloud is completed, you can view the deployed application and services from your IBM Cloud account.
Clone and push the application
You can also manually deploy the app to IBM Cloud. Though not as magical as using the IBM Cloud button above, manually deploying the app gives you some insights about what is happening behind the scenes. Remember that you'd need the IBM Cloud command line installed on your system to deploy the app to IBM Cloud.
1. Clone the repo
Hackernews-NLU repository locally. In a terminal, run:
git clone https://github.com/IBM/Hackernews-NLU
2. Create the NLU service
Create the following service through the IBM Cloud console:
NOTE: Ensure the service is named HackernewsNLU.
- Create the NLU service with the CLI
bx service create natural-language-understanding free "HackernewsNLU"
Once the service is created, you can issue the
bx app push command from the project's root folder to deploy the application to IBM Cloud.
$ bx app push Invoking 'cf push'... Pushing from manifest to org firstname.lastname@example.org / space dev as email@example.com... Using manifest file /Users/stevemar/workspace/Hackernews-NLU/manifest.yml Getting app info... Creating app HackernewsNLU... Mapping routes... Binding services... Comparing local files to remote cache... Packaging files to upload... Uploading files... <truncated> Waiting for app to start... name: HackernewsNLU requested state: started instances: 1/1 usage: 256M x 1 instances routes: hackernewsnlu-rested-aligator.mybluemix.net last uploaded: Wed 08 Aug 17:30:12 EDT 2018 stack: cflinuxfs2 buildpack: swift_buildpack start command: HackernewsNLU state since cpu memory disk details #0 running 2018-08-08T21:37:31Z 7.9% 5.4M of 256M 550.3M of 1G
Once the application is running on IBM Cloud, you can access your application assigned URL (i.e. route). To find the route, you can log on to your IBM Cloud account, or you can inspect the output from the execution of the
bx app push or
bx app show commands. The string value shown next to the
urls field contains the assigned route. Use that route as the URL to access the sample server using the browser of your choice.
By navigating to the running app you should see a web application that retrieves articles from HackerNews. Clicking on a specific article will generate a report that analyzes that article, showing concepts, categories, entities, keywords and other interesting concepts that were extracted from Watson's Natural Language Understanding APIs.
List of HackerNews articles
Individual analysis of a HackerNews article by Watson NLU
Building the project locally
Clone the project
git clone https://github.com/IBM/Hackernews-NLU
Build with the swift command line and launch with XCode
swift package generate-xcodeproj open HackernewsNLU.xcodeproj
If you make any changes rebuild the project using the command below
Can't build the project? Check that your Swift version is up to date:
$ swift package tools-version 3.1.0 $ swift package tools-version --set-current $ swift package tools-version 4.1.0
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