/* using the workmanager api (as in JSR237 etc.)  
 * 
 * in websphere the workmanager API is available very easy on glassfish .... not so simple
 * 
 * this code is inspired by how Spring implented their TaskExecutor for GFv3, google : org.springframework.jca.work.glassfish.GlassFishWorkManagerTaskExecutor
 * 
 *  GFv3 Compile-time dependencies: auto-depends.jar connectors-runtime.jar connectors-internal-api.jar work-management.jar
 *   
 *  
 * if your container (eg. tomcat) does not support this take a look at CommonJ
 */

package dk.thoerup.asyncsamples;

import java.io.IOException;
import java.util.logging.Level;
import java.util.logging.Logger;

import javax.resource.spi.work.Work;
import javax.resource.spi.work.WorkManager;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.sun.enterprise.connectors.ConnectorRuntime;
import com.sun.enterprise.connectors.work.CommonWorkManager;




/**
 * Servlet implementation class WorkManager
 */
public class WorkManagerSample extends HttpServlet {
	private static final long serialVersionUID = 1L;
	
	static final Logger logger = Logger.getLogger(WorkManagerSample.class.getName());
	
	WorkManager mgr;
	
	class MyWork implements Work {
		@Override
		public void release() {			
		}

		@Override
		public void run() {
			DummyWork.doWork();
		}
		
	}

	@Override
	public void init() throws ServletException {
		super.init();
		
		ConnectorRuntime rt = ConnectorRuntime.getRuntime();
		
		final String threadPoolName = "thread-pool-1";

		try {
			mgr = new CommonWorkManager(threadPoolName, rt, null);

		} catch (Exception e) {
			logger.log(Level.SEVERE, "error", e);
		}
	}
	
	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

		try {
			mgr.scheduleWork(new MyWork());
		} catch (Exception e) {
			logger.log(Level.SEVERE, "error", e);
		}

		response.getWriter().print("Finished");
	}

}