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The sample is described in the following topics.


Introduction

This sample invokes yahoo weather API and display results in a web app.

Prerequisites

Up and running App Factory (https://appfactorypreview.wso2.com/appmgt) 

Sample API 'yahoo weather - 1.0.0' with following configurations in WSO2 API STORE (https://apimanager.appfactorypreview.wso2.com/publisher)

             # ProducitonUrl - http://weather.yahooapis.com/forecastrss?w=2502265

             # Select Auth Type of API Resource as Application & Application User as shown below.

(Note: You can create your own API by referring Quick Start Guide#CreatinganAPI)


Executing the Sample

 1. Create a web application in AppFactory. Lets call it API-Invoker application. When you create an application in App Factory it will be automatically created in API-M.

 2. Checkout the API-Invoker source code with git clone command. Its folder structure is as follows:

3. Write your application to get keys by calling the CarbonContext and Registry APIs. The correct sandbox and production keys (consumer key and consumer secret) will be used depending on where the application is deployed.




Note: Sample source code can be found at ed in <APPFACTORY_HOME>/samples directory of the downloaded appfactory pack. Sample index.jsp with above changes can be found at API_Invoker/API_Invoker/WebContent/index.jsp . 

         Replace this file in API-Invoker.

4. Commit the changes made with git commit command.

5. Subscribe the application to the Yahoo Weather API as follows:

  • Click on API-Invoker application in Home page.
  • Click on 'Configure Resources' menu item.
  • Go under 'APIs' section and click 'Subscribe' button.
  • Go under 'Subscribe to an API' section and click 'Add Api' button.
  • You will be redirected to API Manager Homepage (https://apimanager.appfactorypreview.wso2.com/store/).
  • Click on 'yahoo weather - 1.0.0' application.



  • Select API-Invoker from 'Applications' drop down and click 'Subscribe' button. You will get the 'Subscription Successful' pop-up.

6. Generate keys for API-Invoker from App Factory.

  •  Go under 'Subscribe to an API' section and click 'Add Api' button.
  •  Go under 'Saved Keys' section and click 'Generate Keys' button and keys will be generated for sandbox and production separately. 

7. Deploy the application to "Development" environment. Launched app look as follows.

   

      # Give APIManager Url (Eg:- http://apimanager.appfactorypreview.wso2.com - must be a HTTP url).

      # Give end point Url of the Yahoo Weather API. (Eg:- http://apimanager.appfactorypreview.wso2.com:8280/yahooweather/1.0.0).

      # Give Username & Password of the logged user.

      # Click on Submit.

  # Response with weather information will be printed as an XML.

8. Promote the application to "Production" environment and view results.

Note: The results of Development environment  differs from Production environment because the keys that is used by the two environments are different. The programmer is unaware about the sandbox and production keys, and everything is handled underneath.

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