diff --git a/src/main/java/ats/plugin/DurationWindow.java b/src/main/java/ats/plugin/DurationWindow.java
index b399929..523b241 100644
--- a/src/main/java/ats/plugin/DurationWindow.java
+++ b/src/main/java/ats/plugin/DurationWindow.java
@@ -28,7 +28,7 @@ class DurationWindow {
         .appendMinutes().appendSuffix("m")
         .appendSeconds().appendSuffix("s")
         .toFormatter();
-    private final AgentInstanceViewFactoryChainContext agentContext;
+    private final AgentInstanceViewFactoryChainContext context;
     private final long scheduleSlot;
     private EPStatementHandleCallback handle;
     private final Duration interval;
@@ -46,7 +46,7 @@ class DurationWindow {
     {
         this.plugin = plugin;
         this.calc = calc;
-        agentContext = context;
+        this.context = context;
         scheduleSlot = context.getStatementContext().getScheduleBucket().allocateSlot();
         interval = parseInterval(intervalExpression);
     }
@@ -64,7 +64,7 @@ class DurationWindow {
      */
     private Duration parseInterval(ExprNode interval) {
         ExprEvaluator evaluator = interval.getForge().getExprEvaluator();
-        String intervalStr = (String)evaluator.evaluate(null, true, agentContext);
+        String intervalStr = (String)evaluator.evaluate(null, true, context);
         return parseInterval(intervalStr);
     }
 
@@ -145,7 +145,7 @@ class DurationWindow {
      * Set up a callback to post an event when our time window expires.
      */
     private void scheduleCallback(DateTime endTime) {
-        SchedulingService sched = agentContext.getStatementContext().getSchedulingService();
+        SchedulingService sched = context.getStatementContext().getSchedulingService();
         if (handle != null) {
             // remove old schedule
             // log.info("Removing old callback");
@@ -165,7 +165,7 @@ class DurationWindow {
             }
         };
 
-        handle = new EPStatementHandleCallback(agentContext.getEpStatementAgentInstanceHandle(), callback);
+        handle = new EPStatementHandleCallback(context.getEpStatementAgentInstanceHandle(), callback);
         sched.add(callbackTime, handle, scheduleSlot);
         // log.info("Scheduled callback for {}", callbackTime);
     }