Index: lams_monitoring/src/java/org/lamsfoundation/lams/monitoring/service/IMonitoringService.java
===================================================================
diff -u -r05c83089b5b441f4752e33bea2aca4167eaf9b54 -rb763be8a2bbb86f0b8589ae2a51f64f69e9208c1
--- lams_monitoring/src/java/org/lamsfoundation/lams/monitoring/service/IMonitoringService.java	(.../IMonitoringService.java)	(revision 05c83089b5b441f4752e33bea2aca4167eaf9b54)
+++ lams_monitoring/src/java/org/lamsfoundation/lams/monitoring/service/IMonitoringService.java	(.../IMonitoringService.java)	(revision b763be8a2bbb86f0b8589ae2a51f64f69e9208c1)
@@ -22,6 +22,7 @@
 
 import java.util.List;
 
+import org.lamsfoundation.lams.learningdesign.GateActivity;
 import org.lamsfoundation.lams.lesson.Lesson;
 import org.lamsfoundation.lams.tool.service.LamsToolServiceException;
 import org.lamsfoundation.lams.usermanagement.Organisation;
@@ -77,4 +78,17 @@
      * 							will be force complete
      */
     public void forceCompleteLessonByUser(long learnerProgressId);
+    
+    /**
+     * Set the gate to open to let all the learners through. This learning service
+     * is triggerred by the system scheduler.
+     * @param gate the gate that we need to open.
+     */
+    public void openGate(GateActivity gate);
+    
+    /**
+     * Set the gate to closed.
+     * @param gate the gate that we need to close.
+     */
+    public void closeGate(GateActivity gate);
 }
Index: lams_monitoring/src/java/org/lamsfoundation/lams/monitoring/service/MonitoringService.java
===================================================================
diff -u -r05c83089b5b441f4752e33bea2aca4167eaf9b54 -rb763be8a2bbb86f0b8589ae2a51f64f69e9208c1
--- lams_monitoring/src/java/org/lamsfoundation/lams/monitoring/service/MonitoringService.java	(.../MonitoringService.java)	(revision 05c83089b5b441f4752e33bea2aca4167eaf9b54)
+++ lams_monitoring/src/java/org/lamsfoundation/lams/monitoring/service/MonitoringService.java	(.../MonitoringService.java)	(revision b763be8a2bbb86f0b8589ae2a51f64f69e9208c1)
@@ -27,9 +27,11 @@
 
 import org.lamsfoundation.lams.authoring.service.IAuthoringService;
 import org.lamsfoundation.lams.learningdesign.Activity;
+import org.lamsfoundation.lams.learningdesign.GateActivity;
 import org.lamsfoundation.lams.learningdesign.Group;
 import org.lamsfoundation.lams.learningdesign.LearningDesign;
 import org.lamsfoundation.lams.learningdesign.ToolActivity;
+import org.lamsfoundation.lams.learningdesign.dao.IActivityDAO;
 import org.lamsfoundation.lams.lesson.Lesson;
 import org.lamsfoundation.lams.lesson.LessonClass;
 import org.lamsfoundation.lams.lesson.dao.ILessonClassDAO;
@@ -60,8 +62,8 @@
     private ILessonClassDAO lessonClassDAO;
     private ILamsCoreToolService lamsCoreToolService;
     private IAuthoringService authoringService;
+    private IActivityDAO activityDAO;
 
-
     //---------------------------------------------------------------------
     // Inversion of Control Methods - Method injection
     //---------------------------------------------------------------------
@@ -97,6 +99,13 @@
         this.lamsCoreToolService = lamsToolService;
     }
 
+    /**
+     * @param activityDAO The activityDAO to set.
+     */
+    public void setActivityDAO(IActivityDAO activityDAO)
+    {
+        this.activityDAO = activityDAO;
+    }
     //---------------------------------------------------------------------
     // Service Methods
     //---------------------------------------------------------------------
@@ -194,6 +203,23 @@
     }
 
     /**
+     * @see org.lamsfoundation.lams.monitoring.service.IMonitoringService#openGate(org.lamsfoundation.lams.learningdesign.GateActivity)
+     */
+    public void openGate(GateActivity gate)
+    {
+        gate.setGateOpen(new Boolean(true));
+        activityDAO.update(gate);
+    }
+
+    /**
+     * @see org.lamsfoundation.lams.monitoring.service.IMonitoringService#closeGate(org.lamsfoundation.lams.learningdesign.GateActivity)
+     */
+    public void closeGate(GateActivity gate)
+    {
+        gate.setGateOpen(new Boolean(false));
+        activityDAO.update(gate);
+    }
+    /**
      * @see org.lamsfoundation.lams.monitoring.service.IMonitoringService#forceCompleteLessonByUser(long)
      */
     public void forceCompleteLessonByUser(long learnerProgressId)
@@ -321,6 +347,4 @@
         return activity.isToolActivity()
                 && !((ToolActivity) activity).getApplyGrouping().booleanValue();
     }
-
-
 }
\ No newline at end of file
Index: lams_monitoring/test/java/org/lamsfoundation/lams/monitoring/service/TestMonitoringService.java
===================================================================
diff -u -r05c83089b5b441f4752e33bea2aca4167eaf9b54 -rb763be8a2bbb86f0b8589ae2a51f64f69e9208c1
--- lams_monitoring/test/java/org/lamsfoundation/lams/monitoring/service/TestMonitoringService.java	(.../TestMonitoringService.java)	(revision 05c83089b5b441f4752e33bea2aca4167eaf9b54)
+++ lams_monitoring/test/java/org/lamsfoundation/lams/monitoring/service/TestMonitoringService.java	(.../TestMonitoringService.java)	(revision b763be8a2bbb86f0b8589ae2a51f64f69e9208c1)
@@ -23,7 +23,11 @@
 import java.util.LinkedList;
 
 import org.lamsfoundation.lams.AbstractLamsTestCase;
+import org.lamsfoundation.lams.learningdesign.Activity;
+import org.lamsfoundation.lams.learningdesign.GateActivity;
 import org.lamsfoundation.lams.learningdesign.Grouping;
+import org.lamsfoundation.lams.learningdesign.dao.IActivityDAO;
+import org.lamsfoundation.lams.learningdesign.dao.hibernate.ActivityDAO;
 import org.lamsfoundation.lams.lesson.Lesson;
 import org.lamsfoundation.lams.lesson.dao.ILessonDAO;
 import org.lamsfoundation.lams.lesson.dao.hibernate.LessonDAO;
@@ -46,6 +50,7 @@
     private IMonitoringService monitoringService;
     private IUserManagementService usermanageService;
     private ILessonDAO lessonDao; 
+    private IActivityDAO activityDao;
     //---------------------------------------------------------------------
     // Testing Data - Constants
     //---------------------------------------------------------------------
@@ -55,6 +60,8 @@
     private final long TEST_LEARNING_DESIGN_ID = 1;
     private final long TEST_COPIED_LEARNING_DESIGN_ID = 2;
     private final Integer TEST_ORGANIZATION_ID = new Integer(1);
+    private final Long TEST_SCHEDULE_GATE_ID = new Long(27);
+    
     //it might be different because it is automatically generated by database
     //TODO create a get lesson by design method in lesson dao.
     private static Long TEST_LESSON_ID = null;
@@ -74,7 +81,8 @@
         monitoringService = (IMonitoringService)this.context.getBean("monitoringService");
         usermanageService = (IUserManagementService)this.context.getBean("userManagementService");
         lessonDao = (LessonDAO)this.context.getBean("lessonDAO");
-       
+        activityDao = (ActivityDAO)this.context.getBean("activityDAO");
+        
         initializeTestingData();
     }
     /**
@@ -163,6 +171,28 @@
         
     }
 
+    public void testOpenGate()
+    {
+        Activity scheduleGate = activityDao.getActivityByActivityId(TEST_SCHEDULE_GATE_ID);
+        
+        monitoringService.openGate((GateActivity)scheduleGate);
+        
+        Activity openedScheduleGate = activityDao.getActivityByActivityId(TEST_SCHEDULE_GATE_ID);
+        
+        assertTrue("the gate should be opened",((GateActivity)openedScheduleGate).getGateOpen().booleanValue());
+    }
+
+    public void testCloseGate()
+    {
+        Activity scheduleGate = activityDao.getActivityByActivityId(TEST_SCHEDULE_GATE_ID);
+        
+        monitoringService.closeGate((GateActivity)scheduleGate);
+        
+        Activity closedScheduleGate = activityDao.getActivityByActivityId(TEST_SCHEDULE_GATE_ID);
+        
+        assertTrue("the gate should be closed",!((GateActivity)closedScheduleGate).getGateOpen().booleanValue());
+    }
+    
     public void testForceCompleteLessonByUser()
     {
     }