FELIX-4994 : Use Java Logging API in spite of System.out. Apply modified patch from Enrique Ruiz

git-svn-id: https://svn.apache.org/repos/asf/felix/trunk@1695870 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/http/base/src/main/java/org/apache/felix/http/base/internal/logger/JDK14Logger.java b/http/base/src/main/java/org/apache/felix/http/base/internal/logger/JDK14Logger.java
new file mode 100644
index 0000000..95b378d
--- /dev/null
+++ b/http/base/src/main/java/org/apache/felix/http/base/internal/logger/JDK14Logger.java
@@ -0,0 +1,95 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.felix.http.base.internal.logger;
+
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+import org.osgi.framework.BundleContext;
+import org.osgi.framework.ServiceReference;
+
+/**
+ * Logger based on Java Logging API.
+ *
+ */
+public final class JDK14Logger
+    extends AbstractLogger
+{
+    private final Logger defaultLogger = Logger.getLogger(LogServiceLogger.class.getName());
+    private final Level defaultLevel = Level.OFF;
+    private BundleContext context;
+
+    public JDK14Logger(BundleContext context)
+    {
+        this.context = context;
+    }
+
+    @Override
+    public void log(ServiceReference ref, int level, String message, Throwable cause)
+    {
+        Object service = null;
+        Class clazz = null;
+        Logger logger = null;
+
+        if(ref != null)
+        {
+            service = context.getService(ref);
+        }
+
+        if(service != null)
+        {
+            clazz = service.getClass();
+        }
+
+        if(clazz != null)
+        {
+            logger = Logger.getLogger(clazz.getName());
+        }
+        else
+        {
+            logger = defaultLogger;
+        }
+
+        Level logLevel = defaultLevel;
+        switch (level)
+        {
+            case LOG_DEBUG:
+                logLevel = Level.FINE;
+                break;
+            case LOG_INFO:
+                logLevel = Level.INFO;
+                break;
+            case LOG_WARNING:
+                logLevel = Level.WARNING;
+                break;
+            case LOG_ERROR:
+                logLevel = Level.SEVERE;
+                break;
+        }
+
+        if (cause != null)
+        {
+            logger.log(logLevel, message, cause);
+        }
+        else
+        {
+            logger.log(logLevel, message);
+        }
+    }
+}
diff --git a/http/base/src/main/java/org/apache/felix/http/base/internal/logger/LogServiceLogger.java b/http/base/src/main/java/org/apache/felix/http/base/internal/logger/LogServiceLogger.java
index 8c68a18..c048f38 100644
--- a/http/base/src/main/java/org/apache/felix/http/base/internal/logger/LogServiceLogger.java
+++ b/http/base/src/main/java/org/apache/felix/http/base/internal/logger/LogServiceLogger.java
@@ -18,20 +18,30 @@
  */
 package org.apache.felix.http.base.internal.logger;
 
-import org.osgi.util.tracker.ServiceTracker;
 import org.osgi.framework.BundleContext;
 import org.osgi.framework.ServiceReference;
 import org.osgi.service.log.LogService;
+import org.osgi.util.tracker.ServiceTracker;
 
 public final class LogServiceLogger
     extends AbstractLogger
 {
-    private final ConsoleLogger consoleLogger;
+    private final LogService defaultLogger;
     private final ServiceTracker tracker;
 
-    public LogServiceLogger(BundleContext context)
+    private static final String JUL_LOGGER = "org.apache.felix.http.log.jul";
+
+    public LogServiceLogger(final BundleContext context)
     {
-        this.consoleLogger = new ConsoleLogger();
+        Object julLogOpt = context.getProperty(JUL_LOGGER);
+        if ( julLogOpt == null ) {
+            julLogOpt = System.getProperty(JUL_LOGGER);
+        }
+        if ( julLogOpt != null ) {
+            this.defaultLogger = new JDK14Logger(context);
+        } else {
+            this.defaultLogger = new ConsoleLogger();
+        }
         this.tracker = new ServiceTracker(context, LogService.class.getName(), null);
         this.tracker.open();
     }
@@ -41,13 +51,14 @@
         this.tracker.close();
     }
 
+    @Override
     public void log(ServiceReference ref, int level, String message, Throwable cause)
     {
         LogService log = (LogService)this.tracker.getService();
         if (log != null) {
             log.log(ref, level, message, cause);
         } else {
-            this.consoleLogger.log(ref, level, message, cause);
+            this.defaultLogger.log(ref, level, message, cause);
         }
     }
 }