6657695: AbstractSaslImpl.logger is a static mutable (findbugs)

Reviewed-by: alanb

src/share/classes/com/sun/security/sasl/util/AbstractSaslImpl.java

 /*
- * Copyright 2000-2003 Sun Microsystems, Inc.  All Rights Reserved.
+ * Copyright 2000-2009 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
@@ -48,10 +48,6 @@ import sun.misc.HexDumpEncoder;
  * @author Rosanna Lee
  */
 public abstract class AbstractSaslImpl {
-    /**
-     * Logger for debug messages
-     */
-    protected static Logger logger;  // set in initLogger(); lazily loads logger
 
     protected boolean completed = false;
     protected boolean privacy = false;
@@ -68,7 +64,6 @@ public abstract class AbstractSaslImpl {
     protected String myClassName;
 
     protected AbstractSaslImpl(Map props, String className) throws SaslException {
-        initLogger();
         myClassName = className;
 
         // Parse properties  to set desired context options
@@ -325,19 +320,15 @@ public abstract class AbstractSaslImpl {
         }
     }
 
-    /**
-     * Sets logger field.
-     */
-    private static synchronized void initLogger() {
-        if (logger == null) {
-            logger = Logger.getLogger(SASL_LOGGER_NAME);
-        }
-    }
-
     // ---------------- Constants  -----------------
     private static final String SASL_LOGGER_NAME = "javax.security.sasl";
     protected static final String MAX_SEND_BUF = "javax.security.sasl.sendmaxbuffer";
 
+    /**
+     * Logger for debug messages
+     */
+    protected static final Logger logger = Logger.getLogger(SASL_LOGGER_NAME);
+
     // default 0 (no protection); 1 (integrity only)
     protected static final byte NO_PROTECTION = (byte)1;
     protected static final byte INTEGRITY_ONLY_PROTECTION = (byte)2;

test/com/sun/security/sasl/util/CheckAccess.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 6657695
+ * @summary AbstractSaslImpl.logger is a static mutable (findbugs)
+ * @author Vincent Ryan
+ */
+
+import java.lang.reflect.*;
+
+/*
+ * Check that the 'logger' class member is immutable.
+ */
+public class CheckAccess {
+    public static final void main(String[] args) throws Exception {
+            Class clazz =
+                Class.forName("com.sun.security.sasl.util.AbstractSaslImpl");
+            Field field = clazz.getDeclaredField("logger");
+            if (! Modifier.isFinal(field.getModifiers())) {
+                throw new Exception(
+                    "class member 'logger' must be immutable");
+            }
+    }
+}