KB36957: How to Customize an Existing Java-Based Task to Perform Custom Actions using the MicroStrategy Java Web SDK 10.x

The example provided in this document is provided “as-is” to the user and assumes that the user:

• Can program, compile (e.g. javac, jikes, etc.), and execute Java programs
• Can configure environment variables (e.g. JAR files, property files, etc.)
• Have all the necessary tools to create Java applications (JDK, IDE, etc.)
• Has access to the Strategy SDK documentation.
• Has read the customization warning at the bottom of this document

 
PREREQUISITES:
For the sample to work, the Strategy Web JAR files must be accessible by the Java Runtime Environment. The Strategy Web JAR files can be found under:

• Strategy Web Universal (JSP): {web_root}/WEB-INF/lib directory.
• Strategy Web (.NET): Program Files\Common Files\Strategy directory.

Note: More elaborate programs will require additional library files and are out of the scope of this document.
 
SUMMARY
Using the Strategy Java Web SDK, it is possible to extend an existing task to include custom processing. In this example, the Out-of-the-box Login task was extended to dynamically set the Intelligence server name instead of hardcoding the value in the task API call:
 
CODE SNIPPET

package customclasses.tasks;
import com.Strategy.web.beans.MarkupOutput;
import com.Strategy.web.beans.RequestKeys;
import com.Strategy.web.objects.WebCluster;
import com.Strategy.web.objects.WebClusterMembership;
import com.Strategy.web.objects.WebClusterSource;
import com.Strategy.web.objects.WebClusters;
import com.Strategy.web.objects.WebClusterAdmin;
import com.Strategy.web.objects.WebIServerSession;
import com.Strategy.web.objects.WebObjectsException;
import com.Strategy.web.objects.WebObjectsFactory;
import com.Strategy.web.tasks.LoginTask;
import com.Strategy.web.tasks.TaskException;
import com.Strategy.web.tasks.TaskOutput;
import com.Strategy.web.tasks.TaskRequestContext;
import com.Strategy.web.tasks.TaskRequestMalformedException;
import java.lang.String;
import java.util.Enumeration;

public class customLogin extends LoginTask {
	public customLogin() {
		super("dynamically picks a server to create session");

	}

	protected void checkAuthParameters(String server, int port, String project, String login, String password, int authMode) {
		try {
			out("Server: " + server);
			out("port: " + port);
			out("project: " + project);
			out("login: " + login);
			out("password: " + password);
			out("authMode: " + authMode);


			super.checkAuthParameters(server, port, project, login, password, authMode);
		} catch (TaskException e) {
			e.printStackTrace();
		}

	}
	public void processRequest(TaskRequestContext context, TaskOutput out) throws TaskException {
		try {
			out("entering processRequest");

			com.Strategy.web.beans.RequestKeys requestkeys = context.getRequestKeys();

			String s = serverTaskParam.getValue(requestkeys);
			if (s.equalsIgnoreCase("cluster")) {
				//read from the webclusteradmin


				// Lookup the available I-Server name (clustered environment)
				//I-server name
				String serverName = "";
				WebClusterAdmin admin = WebObjectsFactory.getInstance().getClusterAdmin();

				admin.refreshAllClusters();
				Enumeration < WebClusters > clusters = admin.getClusters().elements();

				if (clusters.hasMoreElements()) {
					WebCluster cluster = (WebCluster) clusters.nextElement();

					out("cluster size: " + cluster.size());
					for (int i = 0; i < cluster.size(); i++) {
						out("Name of Node " + i + ": " + cluster.get(i).getNodeName());
					}

					serverName = cluster.get(0).getNodeName();


				}
				//serverName
				context.getRequestKeys().setValue("server", serverName, 0);

				out("testing webclustersource");

				WebClusterSource wcs = WebObjectsFactory.getInstance().getClusterSource();
				WebClusterMembership wcm = wcs.getConnectedClusterMembership();

				out("WebClusterMembership size: " + wcm.size());

			}

			super.processRequest(context, out);
		} catch (TaskException e) {
			e.printStackTrace();
		} catch (WebObjectsException e) {
			e.printStackTrace();
			super.processRequest(context, out);
		}

	}

	public void out(String msg) {
		System.out.println(msg);
	}
}

ADDITIONAL INFORMATION:
The Strategy SDK allows you to customize the standard Strategy Web interface, and extend and integrate the Strategy business intelligence functionality into other applications. However, before changing the way Strategy Web products look or behave, it is helpful to understand how the application is built. For more information regarding the Strategy Web architecture or the process of customizing Strategy Web, please refer to Strategy Developer Zone (https://community.strategy.com/topic/0TO44000000FliLGAS/sdk).
 
To access the Strategy Developer Zone, you must have access to the Strategy Knowledge Base, you must have purchased the Strategy SDK, and you must be current on your Strategy maintenance agreement. If you are a US-based business and believe that you satisfy all three of these conditions but you do not have access to the Strategy Developer Zone, please contact Strategy Technical Support at support@microstrategy.com or at (703) 848-8700 . If you are an international business, please contact Strategy Technical Support at the appropriate email address or phone number found at https://www.microstrategy.com/en/support/contact-support.
 
CUSTOMIZATION WARNING:
This customization is provided as a convenience to Strategy users and is only directly applicable to the version stated. While this code may apply to other releases directly, Strategy Technical Support makes no guarantees that the code provided will apply to any future or previous builds. In the event of a code change in future builds, Strategy Technical Support makes no guarantee that an updated version of this particular customization will be provided. In the event of a code change in future builds, Strategy may not be able to provide additional code on this matter even though this customization is provided at this time for this specific build. For enhancements to this customization or to incorporate similar functionality into other versions, contact your Account Executive to inquire about Strategy Consulting assistance.