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From pa...@apache.org
Subject svn commit: r431007 - /incubator/felix/trunk/framework/src/main/java/org/apache/felix/framework/util/SecureAction.java
Date Sat, 12 Aug 2006 10:14:15 GMT
Author: pauls
Date: Sat Aug 12 03:14:13 2006
New Revision: 431007

URL: http://svn.apache.org/viewvc?rev=431007&view=rev
Log:
Until now, SecureAction was synchronizing the framework for certain operations in order to
reduce
the amount of objects it created. Furthermore, the synchronization was carried out whether
security
was enabled or not.

We now use a threadlocal to avoid synchronization all together at the expense of only a few
more
objects. 

Modified:
    incubator/felix/trunk/framework/src/main/java/org/apache/felix/framework/util/SecureAction.java

Modified: incubator/felix/trunk/framework/src/main/java/org/apache/felix/framework/util/SecureAction.java
URL: http://svn.apache.org/viewvc/incubator/felix/trunk/framework/src/main/java/org/apache/felix/framework/util/SecureAction.java?rev=431007&r1=431006&r2=431007&view=diff
==============================================================================
--- incubator/felix/trunk/framework/src/main/java/org/apache/felix/framework/util/SecureAction.java
(original)
+++ incubator/felix/trunk/framework/src/main/java/org/apache/felix/framework/util/SecureAction.java
Sat Aug 12 03:14:13 2006
@@ -19,7 +19,6 @@
 import java.io.*;
 import java.net.*;
 import java.security.*;
-import java.util.jar.JarFile;
 
 import org.apache.felix.framework.searchpolicy.ContentClassLoader;
 import org.apache.felix.framework.searchpolicy.ContentLoaderImpl;
@@ -39,24 +38,32 @@
 **/
 public class SecureAction
 {
+    private static final ThreadLocal m_actions = new ThreadLocal()
+    {
+        public Object initialValue()
+        {
+            return new Actions();
+        }
+    };
+    
     protected static transient int BUFSIZE = 4096;
 
     private AccessControlContext m_acc = null;
-    private Actions m_actions = new Actions();
 
     public SecureAction()
     {
         m_acc = AccessController.getContext();
     }
 
-    public synchronized String getSystemProperty(String name, String def)
+    public String getSystemProperty(String name, String def)
     {
         if (System.getSecurityManager() != null)
         {
             try
             {
-                m_actions.set(Actions.GET_PROPERTY_ACTION, name, def);
-                return (String) AccessController.doPrivileged(m_actions, m_acc);
+                Actions actions = (Actions) m_actions.get();
+                actions.set(Actions.GET_PROPERTY_ACTION, name, def);
+                return (String) AccessController.doPrivileged(actions, m_acc);
             }
             catch (PrivilegedActionException ex)
             {
@@ -69,14 +76,15 @@
         }
     }
 
-    public synchronized Class forName(String name) throws ClassNotFoundException
+    public Class forName(String name) throws ClassNotFoundException
     {
         if (System.getSecurityManager() != null)
         {
             try
             {
-                m_actions.set(Actions.FOR_NAME_ACTION, name);
-                return (Class) AccessController.doPrivileged(m_actions, m_acc);
+                Actions actions = (Actions) m_actions.get();
+                actions.set(Actions.FOR_NAME_ACTION, name);
+                return (Class) AccessController.doPrivileged(actions, m_acc);
             }
             catch (PrivilegedActionException ex)
             {
@@ -93,7 +101,7 @@
         }
     }
 
-    public synchronized URL createURL(String protocol, String host,
+    public URL createURL(String protocol, String host,
         int port, String path, URLStreamHandler handler)
         throws MalformedURLException
     {
@@ -101,9 +109,10 @@
         {
             try 
             {
-                m_actions.set(
-                    Actions.CREATE_URL_ACTION, protocol, host, port, path, handler);
-                return (URL) AccessController.doPrivileged(m_actions, m_acc);
+                Actions actions = (Actions) m_actions.get();
+                actions.set(Actions.CREATE_URL_ACTION, protocol, host, port, 
+                    path, handler);
+                return (URL) AccessController.doPrivileged(actions, m_acc);
             }
             catch (PrivilegedActionException ex)
             {
@@ -120,14 +129,15 @@
         }
     }
 
-    public synchronized String getAbsolutePath(File file)
+    public String getAbsolutePath(File file)
     {
         if (System.getSecurityManager() != null)
         {
             try
             {
-                m_actions.set(Actions.GET_ABSOLUTE_PATH_ACTION, file);
-                return (String) AccessController.doPrivileged(m_actions, m_acc);
+                Actions actions = (Actions) m_actions.get();
+                actions.set(Actions.GET_ABSOLUTE_PATH_ACTION, file);
+                return (String) AccessController.doPrivileged(actions, m_acc);
             }
             catch (PrivilegedActionException ex)
             {
@@ -140,14 +150,15 @@
         }
     }
 
-    public synchronized boolean fileExists(File file)
+    public boolean fileExists(File file)
     {
         if (System.getSecurityManager() != null)
         {
             try
             {
-                m_actions.set(Actions.FILE_EXISTS_ACTION, file);
-                return ((Boolean) AccessController.doPrivileged(m_actions, m_acc))
+                Actions actions = (Actions) m_actions.get();
+                actions.set(Actions.FILE_EXISTS_ACTION, file);
+                return ((Boolean) AccessController.doPrivileged(actions, m_acc))
                     .booleanValue();
             }
             catch (PrivilegedActionException ex)
@@ -161,14 +172,15 @@
         }
     }
 
-    public synchronized boolean isFileDirectory(File file)
+    public boolean isFileDirectory(File file)
     {
         if (System.getSecurityManager() != null)
         {
             try
             {
-                m_actions.set(Actions.FILE_IS_DIRECTORY_ACTION, file);
-                return ((Boolean) AccessController.doPrivileged(m_actions, m_acc))
+                Actions actions = (Actions) m_actions.get();
+                actions.set(Actions.FILE_IS_DIRECTORY_ACTION, file);
+                return ((Boolean) AccessController.doPrivileged(actions, m_acc))
                     .booleanValue();
             }
             catch (PrivilegedActionException ex)
@@ -182,14 +194,15 @@
         }
     }
 
-    public synchronized boolean mkdir(File file)
+    public boolean mkdir(File file)
     {
         if (System.getSecurityManager() != null)
         {
             try
             {
-                m_actions.set(Actions.MAKE_DIRECTORY_ACTION, file);
-                return ((Boolean) AccessController.doPrivileged(m_actions, m_acc))
+                Actions actions = (Actions) m_actions.get();
+                actions.set(Actions.MAKE_DIRECTORY_ACTION, file);
+                return ((Boolean) AccessController.doPrivileged(actions, m_acc))
                     .booleanValue();
             }
             catch (PrivilegedActionException ex)
@@ -203,14 +216,15 @@
         }
     }
 
-    public synchronized boolean mkdirs(File file)
+    public boolean mkdirs(File file)
     {
         if (System.getSecurityManager() != null)
         {
             try
             {
-                m_actions.set(Actions.MAKE_DIRECTORIES_ACTION, file);
-                return ((Boolean) AccessController.doPrivileged(m_actions, m_acc))
+                Actions actions = (Actions) m_actions.get();
+                actions.set(Actions.MAKE_DIRECTORIES_ACTION, file);
+                return ((Boolean) AccessController.doPrivileged(actions, m_acc))
                     .booleanValue();
             }
             catch (PrivilegedActionException ex)
@@ -224,14 +238,15 @@
         }
     }
 
-    public synchronized File[] listDirectory(File file)
+    public File[] listDirectory(File file)
     {
         if (System.getSecurityManager() != null)
         {
             try
             {
-                m_actions.set(Actions.LIST_DIRECTORY_ACTION, file);
-                return (File[]) AccessController.doPrivileged(m_actions, m_acc);
+                Actions actions = (Actions) m_actions.get();
+                actions.set(Actions.LIST_DIRECTORY_ACTION, file);
+                return (File[]) AccessController.doPrivileged(actions, m_acc);
             }
             catch (PrivilegedActionException ex)
             {
@@ -244,14 +259,15 @@
         }
     }
 
-    public synchronized boolean renameFile(File oldFile, File newFile)
+    public boolean renameFile(File oldFile, File newFile)
     {
         if (System.getSecurityManager() != null)
         {
             try
             {
-                m_actions.set(Actions.RENAME_FILE_ACTION, oldFile, newFile);
-                return ((Boolean) AccessController.doPrivileged(m_actions, m_acc))
+                Actions actions = (Actions) m_actions.get();
+                actions.set(Actions.RENAME_FILE_ACTION, oldFile, newFile);
+                return ((Boolean) AccessController.doPrivileged(actions, m_acc))
                     .booleanValue();
             }
             catch (PrivilegedActionException ex)
@@ -265,14 +281,15 @@
         }
     }
 
-    public synchronized InputStream getFileInputStream(File file) throws IOException
+    public InputStream getFileInputStream(File file) throws IOException
     {
         if (System.getSecurityManager() != null)
         {
             try
             {
-                m_actions.set(Actions.GET_FILE_INPUT_ACTION, file);
-                return (InputStream) AccessController.doPrivileged(m_actions, m_acc);
+                Actions actions = (Actions) m_actions.get();
+                actions.set(Actions.GET_FILE_INPUT_ACTION, file);
+                return (InputStream) AccessController.doPrivileged(actions, m_acc);
             }
             catch (PrivilegedActionException ex)
             {
@@ -289,14 +306,15 @@
         }
     }
 
-    public synchronized OutputStream getFileOutputStream(File file) throws IOException
+    public OutputStream getFileOutputStream(File file) throws IOException
     {
         if (System.getSecurityManager() != null)
         {
             try
             {
-                m_actions.set(Actions.GET_FILE_OUTPUT_ACTION, file);
-                return (OutputStream) AccessController.doPrivileged(m_actions, m_acc);
+                Actions actions = (Actions) m_actions.get();
+                actions.set(Actions.GET_FILE_OUTPUT_ACTION, file);
+                return (OutputStream) AccessController.doPrivileged(actions, m_acc);
             }
             catch (PrivilegedActionException ex)
             {
@@ -313,15 +331,16 @@
         }
     }
     
-    public synchronized InputStream getURLConnectionInputStream(URLConnection conn) 
+    public InputStream getURLConnectionInputStream(URLConnection conn) 
         throws IOException
     {
         if (System.getSecurityManager() != null)
         {
             try
             {
-                m_actions.set(Actions.GET_URL_INPUT_ACTION, conn);
-                return (InputStream) AccessController.doPrivileged(m_actions, m_acc);
+                Actions actions = (Actions) m_actions.get();
+                actions.set(Actions.GET_URL_INPUT_ACTION, conn);
+                return (InputStream) AccessController.doPrivileged(actions, m_acc);
             }
             catch (PrivilegedActionException ex)
             {
@@ -338,14 +357,15 @@
         }
     }
 
-    public synchronized boolean deleteFile(File target)
+    public boolean deleteFile(File target)
     {
         if (System.getSecurityManager() != null)
         {
             try
             {
-                m_actions.set(Actions.DELETE_FILE_ACTION, target);
-                return ((Boolean) AccessController.doPrivileged(m_actions, m_acc))
+                Actions actions = (Actions) m_actions.get();
+                actions.set(Actions.DELETE_FILE_ACTION, target);
+                return ((Boolean) AccessController.doPrivileged(actions, m_acc))
                     .booleanValue();
             }
             catch (PrivilegedActionException ex)
@@ -359,14 +379,15 @@
         }
     }
 
-    public synchronized JarFileX openJAR(File file) throws IOException
+    public JarFileX openJAR(File file) throws IOException
     {
         if (System.getSecurityManager() != null)
         {
             try
             {
-                m_actions.set(Actions.OPEN_JAR_ACTION, file);
-                return (JarFileX) AccessController.doPrivileged(m_actions, m_acc);
+                Actions actions = (Actions) m_actions.get();
+                actions.set(Actions.OPEN_JAR_ACTION, file);
+                return (JarFileX) AccessController.doPrivileged(actions, m_acc);
             }
             catch (PrivilegedActionException ex)
             {
@@ -383,14 +404,15 @@
         }
     }
    
-    public synchronized ContentClassLoader createContentClassLoader(ContentLoaderImpl impl)
+    public ContentClassLoader createContentClassLoader(ContentLoaderImpl impl)
     {
         if (System.getSecurityManager() != null)
         {
             try
             {
-                m_actions.set(Actions.CREATE_CONTENTCLASSLOADER_ACTION, impl);
-                return (ContentClassLoader) AccessController.doPrivileged(m_actions);
+                Actions actions = (Actions) m_actions.get();
+                actions.set(Actions.CREATE_CONTENTCLASSLOADER_ACTION, impl);
+                return (ContentClassLoader) AccessController.doPrivileged(actions, m_acc);
             }
             catch (PrivilegedActionException ex)
             {
@@ -403,7 +425,7 @@
         }
     }
 
-    private class Actions implements PrivilegedExceptionAction
+    private static class Actions implements PrivilegedExceptionAction
     {
         public static final int GET_PROPERTY_ACTION = 0;
         public static final int FOR_NAME_ACTION = 1;
@@ -431,7 +453,7 @@
         private int m_port = -1;
         private String m_path = null;
         private URLStreamHandler m_handler = null;
-
+        
         public void set(int action, Object arg1)
         {
             m_action = action;
@@ -472,73 +494,92 @@
             m_arg2 = null;
         }
 
+        private void unset()
+        {
+            m_action = -1;
+            m_arg1 = null;
+            m_arg2 = null;
+            m_protocol = null;
+            m_host = null;
+            m_port = -1;
+            m_path = null;
+            m_handler = null;
+        }
+        
         public Object run() throws Exception
         {
-            if (m_action == GET_PROPERTY_ACTION)
-            {
-                return System.getProperty((String) m_arg1, (String) m_arg2);
-            }
-            else if (m_action == FOR_NAME_ACTION)
-            {
-                return Class.forName((String) m_arg1);
-            }
-            else if (m_action == CREATE_URL_ACTION)
-            {
-                return new URL(m_protocol, m_host, m_port, m_path, m_handler);
-            }
-            else if (m_action == GET_ABSOLUTE_PATH_ACTION)
-            {
-                return ((File) m_arg1).getAbsolutePath();
-            }
-            else if (m_action == FILE_EXISTS_ACTION)
-            {
-                return ((File) m_arg1).exists() ? Boolean.TRUE : Boolean.FALSE;
-            }
-            else if (m_action == FILE_IS_DIRECTORY_ACTION)
-            {
-                return ((File) m_arg1).isDirectory() ? Boolean.TRUE : Boolean.FALSE;
-            }
-            else if (m_action == MAKE_DIRECTORY_ACTION)
-            {
-                return ((File) m_arg1).mkdir() ? Boolean.TRUE : Boolean.FALSE;
-            }
-            else if (m_action == MAKE_DIRECTORIES_ACTION)
-            {
-                return ((File) m_arg1).mkdirs() ? Boolean.TRUE : Boolean.FALSE;
-            }
-            else if (m_action == LIST_DIRECTORY_ACTION)
-            {
-                return ((File) m_arg1).listFiles();
-            }
-            else if (m_action == RENAME_FILE_ACTION)
-            {
-                return ((File) m_arg1).renameTo((File) m_arg2) ? Boolean.TRUE : Boolean.FALSE;
-            }
-            else if (m_action == GET_FILE_INPUT_ACTION)
-            {
-                return new FileInputStream((File) m_arg1);
-            }
-            else if (m_action == GET_FILE_OUTPUT_ACTION)
-            {
-                return new FileOutputStream((File) m_arg1);
-            }
-            else if (m_action == DELETE_FILE_ACTION)
-            {
-                return ((File) m_arg1).delete() ? Boolean.TRUE : Boolean.FALSE;
-            }
-            else if (m_action == OPEN_JAR_ACTION)
-            {
-                return new JarFileX((File) m_arg1);
-            }
-            else if (m_action == GET_URL_INPUT_ACTION)
+            try
             {
-                return ((URLConnection) m_arg1).getInputStream();
+                if (m_action == GET_PROPERTY_ACTION)
+                {
+                    return System.getProperty((String) m_arg1, (String) m_arg2);
+                }
+                else if (m_action == FOR_NAME_ACTION)
+                {
+                    return Class.forName((String) m_arg1);
+                }
+                else if (m_action == CREATE_URL_ACTION)
+                {
+                    return new URL(m_protocol, m_host, m_port, m_path, m_handler);
+                }
+                else if (m_action == GET_ABSOLUTE_PATH_ACTION)
+                {
+                    return ((File) m_arg1).getAbsolutePath();
+                }
+                else if (m_action == FILE_EXISTS_ACTION)
+                {
+                    return ((File) m_arg1).exists() ? Boolean.TRUE : Boolean.FALSE;
+                }
+                else if (m_action == FILE_IS_DIRECTORY_ACTION)
+                {
+                    return ((File) m_arg1).isDirectory() ? Boolean.TRUE : Boolean.FALSE;
+                }
+                else if (m_action == MAKE_DIRECTORY_ACTION)
+                {
+                    return ((File) m_arg1).mkdir() ? Boolean.TRUE : Boolean.FALSE;
+                }
+                else if (m_action == MAKE_DIRECTORIES_ACTION)
+                {
+                    return ((File) m_arg1).mkdirs() ? Boolean.TRUE : Boolean.FALSE;
+                }
+                else if (m_action == LIST_DIRECTORY_ACTION)
+                {
+                    return ((File) m_arg1).listFiles();
+                }
+                else if (m_action == RENAME_FILE_ACTION)
+                {
+                    return ((File) m_arg1).renameTo((File) m_arg2) ? Boolean.TRUE : Boolean.FALSE;
+                }
+                else if (m_action == GET_FILE_INPUT_ACTION)
+                {
+                    return new FileInputStream((File) m_arg1);
+                }
+                else if (m_action == GET_FILE_OUTPUT_ACTION)
+                {
+                    return new FileOutputStream((File) m_arg1);
+                }
+                else if (m_action == DELETE_FILE_ACTION)
+                {
+                    return ((File) m_arg1).delete() ? Boolean.TRUE : Boolean.FALSE;
+                }
+                else if (m_action == OPEN_JAR_ACTION)
+                {
+                    return new JarFileX((File) m_arg1);
+                }
+                else if (m_action == GET_URL_INPUT_ACTION)
+                {
+                    return ((URLConnection) m_arg1).getInputStream();
+                }
+                else if (m_action == CREATE_CONTENTCLASSLOADER_ACTION)
+                {
+                    return new ContentClassLoader((ContentLoaderImpl) m_arg1);
+                }
+                return null;
             }
-            else if (m_action == CREATE_CONTENTCLASSLOADER_ACTION)
+            finally
             {
-                return new ContentClassLoader((ContentLoaderImpl) m_arg1);
+                unset();
             }
-            return null;
         }
     }
 }



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