Introduce killing a zombie RWT UI session

[lgpl/argeo-commons.git] / swt / org.argeo.cms.swt / src / org / argeo / cms / swt / CmsSwtUi.java

diff --git a/swt/org.argeo.cms.swt/src/org/argeo/cms/swt/CmsSwtUi.java b/swt/org.argeo.cms.swt/src/org/argeo/cms/swt/CmsSwtUi.java
index e0f63e45e2eb85578428923964f1421fa1ba25fe..d02ad3aec371202cb8f4c42364b15a45277b5605 100644 (file)
--- a/swt/org.argeo.cms.swt/src/org/argeo/cms/swt/CmsSwtUi.java
+++ b/swt/org.argeo.cms.swt/src/org/argeo/cms/swt/CmsSwtUi.java
@@ -10,17 +10,77 @@ public class CmsSwtUi extends Composite implements CmsUi {
 
        private static final long serialVersionUID = -107939076610406448L;
 
+       /** Last time the UI was accessed. */
+       private long lastAccess = System.currentTimeMillis();
+//     private TimerTask timeoutTask;
+       private long uiTimeout = 0;
+
        private CmsView cmsView;
 
        public CmsSwtUi(Composite parent, int style) {
                super(parent, style);
                cmsView = CmsSwtUtils.getCmsView(parent);
-
                setLayout(new GridLayout());
        }
 
+       @Override
        public CmsView getCmsView() {
                return cmsView;
        }
 
+       @Override
+       public void updateLastAccess() {
+               this.lastAccess = System.currentTimeMillis();
+       }
+
+       public void setUiTimeout(long uiTimeout) {
+//             clearTimeoutTask();
+               this.uiTimeout = uiTimeout;
+               if (this.uiTimeout <= 0)
+                       return;
+               // TODO introduce mechanism to check whether the UI is "zombie"
+               // (that is the UI thread still exists, but cannot execute anything)
+//             final long timeoutTaskPeriod = 60 * 60 * 1000;// 1h
+//             timeoutTask = cmsView.schedule(() -> {
+//                     disposeIfTimedout();
+//             }, timeoutTaskPeriod, timeoutTaskPeriod);
+//             addDisposeListener((e) -> {
+//                     clearTimeoutTask();
+//             });
+       }
+
+//     /** Must be run in UI thread. */
+//     public void disposeIfTimedout() {
+//             System.out.println("Enter disposeIfTimedout");
+//             if (isDisposed()) {
+//                     clearTimeoutTask();
+//                     return;
+//             }
+//             if (isTimedOut()) {
+//                     dispose();
+//                     clearTimeoutTask();
+//                     System.out.println("Disposed after timeout");
+//             }
+//     }
+
+//     private void clearTimeoutTask() {
+//             if (timeoutTask != null) {
+//                     timeoutTask.cancel();
+//                     timeoutTask = null;
+//             }
+//     }
+
+       @Override
+       public boolean isTimedOut() {
+               return uiTimeout > 0 && (System.currentTimeMillis() - lastAccess >= uiTimeout);
+       }
+
+//     class DisposeIfTimedOutTask implements Runnable {
+//             public void run() {
+//                     disposeIfTimedout();
+//                     getDisplay().timerExec(1000, new DisposeIfTimedOutTask());
+//             }
+//
+//     }
+
 }
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