Initial commit

demo-app/src/main/java/com/example/leakdemo/SnoopView.java

@@ -0,0 +1,24 @@
+package com.example.leakdemo;
+
+import com.vaadin.flow.component.Component;
+import com.vaadin.flow.component.html.H2;
+import com.vaadin.flow.component.html.Paragraph;
+import com.vaadin.flow.component.orderedlayout.VerticalLayout;
+import com.vaadin.flow.router.Route;
+
+/** LEAK: the view of one user keeps a reference to a view of a different user. */
+@Route("snoop")
+public class SnoopView extends VerticalLayout {
+
+    private Component peeked;
+
+    public SnoopView() {
+        add(new H2("Snoop"));
+        synchronized (StaticLeakView.RECENT_VIEWS) {
+            if (!StaticLeakView.RECENT_VIEWS.isEmpty()) {
+                peeked = StaticLeakView.RECENT_VIEWS.get(0);
+            }
+        }
+        add(new Paragraph(peeked == null ? "nothing to peek at" : "peeking at " + peeked.getClass().getSimpleName()));
+    }
+}