Adding implementation of a Jetty Logger that routes to a java.util.logging.Logger

git-svn-id: svn+ssh://dev.eclipse.org/svnroot/rt/org.eclipse.jetty/jetty/trunk@594 7e9141cc-0065-0410-87d8-b60c137991c4

jetty-util/src/main/java/org/eclipse/jetty/util/log/JavaUtilLog.java

@@ -0,0 +1,104 @@
+package org.eclipse.jetty.util.log;
+
+import java.util.logging.Level;
+
+/**
+ * <p>
+ * Implementation of Jetty {@link Logger} based on {@link java.util.logging.Logger}.
+ * </p>
+ * 
+ * <p>
+ * Honors the standard jetty system property <code>"org.eclipse.jetty.util.log.DEBUG"</code> to set logger into debug
+ * mode (defaults to false, set to "true" to enable)
+ * </p>
+ * 
+ * <p>
+ * You can also set the logger level using <a href="http://java.sun.com/j2se/1.5.0/docs/guide/logging/overview.html">
+ * standard java.util.logging configuration</a> against the name <code>"org.eclipse.jetty.util.log"</code>.
+ * </p>
+ */
+public class JavaUtilLog implements Logger
+{
+    private java.util.logging.Logger logger;
+
+    public JavaUtilLog()
+    {
+        this("org.eclipse.jetty.util.log");
+    }
+
+    public JavaUtilLog(String name)
+    {
+        logger = java.util.logging.Logger.getLogger(name);
+        if (Boolean.getBoolean("org.eclipse.jetty.util.log.DEBUG"))
+        {
+            logger.setLevel(Level.FINE);
+        }
+    }
+
+    public void debug(String msg)
+    {
+        logger.log(Level.FINE,msg);
+    }
+
+    public void debug(String msg, Throwable th)
+    {
+        logger.log(Level.FINE,msg,th);
+    }
+
+    public void debug(String msg, Object arg0, Object arg1)
+    {
+        logger.log(Level.FINE,format(msg,arg0,arg1));
+    }
+
+    public Logger getLogger(String name)
+    {
+        return new JavaUtilLog(name);
+    }
+
+    public void info(String msg)
+    {
+        logger.log(Level.INFO,msg);
+    }
+
+    public void info(String msg, Object arg0, Object arg1)
+    {
+        logger.log(Level.INFO,format(msg,arg0,arg1));
+    }
+
+    public boolean isDebugEnabled()
+    {
+        return logger.isLoggable(Level.FINE);
+    }
+
+    public void setDebugEnabled(boolean enabled)
+    {
+        logger.setLevel(Level.FINE);
+    }
+
+    public void warn(String msg)
+    {
+        logger.log(Level.WARNING,msg);
+    }
+
+    public void warn(String msg, Object arg0, Object arg1)
+    {
+        logger.log(Level.WARNING,format(msg,arg0,arg1));
+    }
+
+    public void warn(String msg, Throwable th)
+    {
+        logger.log(Level.WARNING,msg,th);
+    }
+
+    private String format(String msg, Object arg0, Object arg1)
+    {
+        int i0 = msg.indexOf("{}");
+        int i1 = i0 < 0?-1:msg.indexOf("{}",i0 + 2);
+
+        if (arg1 != null && i1 >= 0)
+            msg = msg.substring(0,i1) + arg1 + msg.substring(i1 + 2);
+        if (arg0 != null && i0 >= 0)
+            msg = msg.substring(0,i0) + arg0 + msg.substring(i0 + 2);
+        return msg;
+    }
+}