6660539: Introspector shares cache of mutable BeanInfo between AppContexts.

Reviewed-by: peterz

jdk/src/share/classes/java/beans/Introspector.java

 /*
- * Copyright 1996-2006 Sun Microsystems, Inc.  All Rights Reserved.
+ * Copyright 1996-2009 Sun Microsystems, Inc.  All Rights Reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -45,6 +45,7 @@ import java.util.EventListener;
 import java.util.List;
 import java.util.WeakHashMap;
 import java.util.TreeMap;
+import sun.awt.AppContext;
 import sun.reflect.misc.ReflectUtil;
 
 /**
@@ -111,8 +112,8 @@ public class Introspector {
     // Static Caches to speed up introspection.
     private static Map declaredMethodCache =
         Collections.synchronizedMap(new WeakHashMap());
-    private static Map beanInfoCache =
-        Collections.synchronizedMap(new WeakHashMap());
+
+    private static final Object BEANINFO_CACHE = new Object();
 
     private Class beanClass;
     private BeanInfo explicitBeanInfo;
@@ -175,10 +176,18 @@ public class Introspector {
         if (!ReflectUtil.isPackageAccessible(beanClass)) {
             return (new Introspector(beanClass, null, USE_ALL_BEANINFO)).getBeanInfo();
         }
-        BeanInfo bi = (BeanInfo)beanInfoCache.get(beanClass);
+        Map<Class<?>, BeanInfo> map;
+        synchronized (BEANINFO_CACHE) {
+            map = (Map<Class<?>, BeanInfo>) AppContext.getAppContext().get(BEANINFO_CACHE);
+            if (map == null) {
+                map = Collections.synchronizedMap(new WeakHashMap<Class<?>, BeanInfo>());
+                AppContext.getAppContext().put(BEANINFO_CACHE, map);
+            }
+        }
+        BeanInfo bi = map.get(beanClass);
         if (bi == null) {
             bi = (new Introspector(beanClass, null, USE_ALL_BEANINFO)).getBeanInfo();
-            beanInfoCache.put(beanClass, bi);
+            map.put(beanClass, bi);
         }
         return bi;
     }
@@ -351,7 +360,10 @@ public class Introspector {
      */
 
     public static void flushCaches() {
-        beanInfoCache.clear();
+        Map map = (Map) AppContext.getAppContext().get(BEANINFO_CACHE);
+        if (map != null) {
+            map.clear();
+        }
         declaredMethodCache.clear();
     }
 
@@ -374,7 +386,10 @@ public class Introspector {
         if (clz == null) {
             throw new NullPointerException();
         }
-        beanInfoCache.remove(clz);
+        Map map = (Map) AppContext.getAppContext().get(BEANINFO_CACHE);
+        if (map != null) {
+            map.remove(clz);
+        }
         declaredMethodCache.remove(clz);
     }
 

jdk/test/java/beans/Introspector/Test6660539.java

+/*
+ * Copyright 2009 Sun Microsystems, Inc.  All Rights Reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ */
+
+/*
+ * @test
+ * @bug 6660539
+ * @summary Tests changeable BeanInfo cache in different application contexts
+ * @author Sergey Malenkov
+ */
+
+import sun.awt.SunToolkit;
+
+import java.beans.BeanInfo;
+import java.beans.IntrospectionException;
+import java.beans.Introspector;
+import java.beans.PropertyDescriptor;
+
+public class Test6660539 implements Runnable {
+    private static final String NAME = "$$$";
+
+    public static void main(String[] args) throws Exception {
+        for (PropertyDescriptor pd : getPropertyDescriptors()) {
+            pd.setDisplayName(NAME);
+        }
+        ThreadGroup group = new ThreadGroup(NAME);
+        Thread thread = new Thread(group, new Test6660539());
+        thread.start();
+        thread.join();
+    }
+
+    public void run() {
+        SunToolkit.createNewAppContext();
+        for (PropertyDescriptor pd : getPropertyDescriptors()) {
+            if (pd.getDisplayName().equals(NAME))
+                throw new Error("shared BeanInfo cache");
+        }
+    }
+
+    private static PropertyDescriptor[] getPropertyDescriptors() {
+        try {
+            BeanInfo info = Introspector.getBeanInfo(Test6660539.class);
+            return info.getPropertyDescriptors();
+        }
+        catch (IntrospectionException exception) {
+            throw new Error("unexpected", exception);
+        }
+    }
+}