Web Example

This example demonstrates how to deploy a web application accessing a single Space data-grid.

The AccessSpaceServlet is responsible for retrieving request parameters, creating an instance of type UserData and writing it to the space.

The SpaceContents.jsp displays the contents of all the UserData instances stored in the Space, and renders two input fields, Name and Value for the user to input new values.

BUILD

The example uses maven as its build tool. It comes with a build script that runs maven automatically. Running the build script with no parameters within the current directory will list all the relevant tasks that can be run with this example.

The available commands are:

• clean - Cleans all output dirs
• compile - Builds all (don't create WAR file)
• package - Builds the distribution
• deploy - Deploys the web app on the service grid
• undeploy - Undeploys the web app from the service grid

• Running build.(sh/bat) package will finalize the processing unit structure under /examples/web-app/web-space-access/target/SpaceAccess and create a deployment WAR /examples/web-app/web-space-access/target/SpaceAccess.war.

• /examples/web-app/web-space-access/target/SpaceAccess/ contains the SpaceContents.jsp

• /examples/web-app/web-space-access/target/SpaceAccess/spring/ contains pu.properties and pu.xml for the session configuration and sla.xml contains the deployment properties (number of instances and constraints)

• /examples/web-app/web-space-access/target/SpaceAccess/WEB-INF/ contains the web.xml referencing the servlet class

DEPLOYMENT

In order to deploy the web example onto the Service Grid:

• run XAP agent with manager $XAP_HOME/bin/xap host run-agent --auto --gsc=3 which will start a Manager, 3 GSCs and GS-WEBUI

• run build.(sh/bat) deploy. This will deploy the /examples/web-app/web-space-access/target/SpaceAccess.war into the running GSM.

• The web page of this application is available at http://<host IP>:<web port>/SpaceAccess/ for example (http://localhost:8180/SpaceAccess/, http://localhost:8181/SpaceAccess/ and http://localhost:8182/SpaceAccess/)