BACK-END DEVELOPMENT

• Click in File > New > Dynamic Web Project > Fill the project name field > Add a runtime by selecting the Java web SDK from SAP Hana Cloud Platforms tools > Next > Next > Check the “Generate web.xml” box
• Right click on the project > Configure > Convert to Maven Project

Configuring maven

• Open the Pom.xml and configure the properties, repositories and dependencies

Creating the packages

• com.sap.task.tracker.application
• com.sap.task.tracker.controller
• com.sap.task.tracker.dao
• com.sap.task.tracker.model

Configuring the Spring framework

• Open the WebContent/WEB-INF/
• Create a new file called mvc-dispatcher-servlet.xml
• Don’t forget to map the packages: application, controller and dao

Configuring the web.xml

• Open the WebContent/WEB-INF/web.xml
• Configure the Spring
• Configure the Datasource

Configuring the persistence layer

• Create a class called PersistenceJPAConfig.java in the com.sap.task.tracker.application package
• Map the package containing the JPA models

Creating the model

• Create a new class called Task in the model package
• Create three attributes: o id (long) o name (String) o done (Boolean)
• Create getters/setter methods
• Add the annotation @Entity above the class definition
• Add the annotation @id
• Add the annotation @column(nullable = false) for the name and done attributes

Creating the DAO

• Create a new class called TaskDAO in the dao package
• Add the annotation @Repository above the class definition
• Create the EntityManager attribute and annotate with @PersistenceContext
• Create the method to get all the Tasks from the database
• Create the method to get a task by the id
• Create the method to persist a new Task
• Create the method to delete a Task
• Create the method to update the Task done attribute

Creating the controller

• Create a new class called TaskController in the controller package
• Annotate the class with @Controller and @RequestMapping(“/task”)
• Declare the TaskDao instance and annotate with @Autowired
• Create the webservices which will call the methods from the DAO

Testing locally

• Create a new Java Web Server
• Select the SDK if needed
• Add the project to the server
• Publish and Start the server

Deploying to the HCP

• Create a new SAP Hana Cloud Platform server
• Change the Landscape host to “hanatrial.ondemand.com”
• In runtime select the Java Web
• Fill the fields with your data
• Add the project to the server
• Publish
• Open the HCP cockpit and start the application