Requirements:

• Git
• Github account
• Java
• Eclipse for J2EE
• WebSphere Liberty with JavaEE7
• WebSphere Liberty plugin for Eclipse
• Add *.cloudant.com.crt to the WepSphere Liberty Profile (wlp) server’s Java Key Store (JKS)
• Optional: WAS AdminCenter 1.0
• Optional: Maven

Steps:

1. Create the StarterApp
2. Add the Toolchain or Continuous Integration (CI)
3. Setup Localhost
4. Add JSPs and Servlet for News Search
5. Add REST API that calls the AlchemyData News API
6. Save the AlchemyData News Search Results in CloudantDB
7. Add a D3js Sentiment Score Graph
8. Configure the CloudantDB for Querying
9. Show History of Search Results

1. Create the StarterApp

1. Sign in to Bluemix.net,
2. Go to Catalog,
3. Under ‘Boilerplates’, click the ‘Java Cloudant Web Starter’,
4. For ‘App name’ and ‘Host name’ enter ‘<username>-liberty-watson’,
5. Click the ‘Create’ button,
6. In ‘Application Details’ click the ‘Overview’ link,
   
7. Review the application configuration,
8. Click ‘Connections’ and click ‘Connect New’ to create the following services:
9. If no AlchemyAPI service already exists, create a new AlchemyAPI service by clicking the ‘Connect New’ button,
10. from the Catalog, filter by ‘Watson’, select the AlchemyAPI service, click the ‘Create’ button, and click ‘Restage’
11. Note: by default you can only create 1 instance of the AlchemyAPI service under your organization in a single space, creating a second instance or connecting an existing service in another space will cause an error. If an instance already exists, click the ‘Connect Existing’ instead, select the existing AlchemyAPI service and click the ‘Connect’ button, click ‘Restage’,

2. Add the Toolchain or Continuous Integration (CI)

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Overview

Note: this API needs to be updated to v2. Identify is now a resource on the Language Translation API.
http://www.ibm.com/smarterplanet/us/en/ibmwatson/developercloud/language-translation/api/v2/

Making an HTTP REST API POST request in Java is in principle as simple this:
Request request = Request.Post(serviceURI)
.addHeader("Authorization", basicAuthorization)
.bodyString(body, ContentType.APPLICATION_FORM_URLENCODED);
Executor executor = Executor.newInstance();
String response = executor.execute(request).returnContent().asString();

This code, uses the Apache Fluent API, which exposes only the essentials of the Apache HTTPClient.

The Authorization header is required for authentication by the Watson API, and is a base64 encoded string.
String auth = username + ":" + password;
String basicAuthorization = "Basic "+ Base64.encodeBase64String(auth.getBytes());


The POST request is “x-www-form-urlencoded” and in Java consists of a List<NameValuePair>:
List<NameValuePair> params = new ArrayList<NameValuePair>();

Continue reading →