switch from simple log4j to logback

leshan-client-demo/logback-config.xml

@@ -0,0 +1,33 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- 
+Copyright (c) 2013-2015 Sierra Wireless and others.
+
+All rights reserved. This program and the accompanying materials
+are made available under the terms of the Eclipse Public License v2.0
+and Eclipse Distribution License v1.0 which accompany this distribution.
+
+The Eclipse Public License is available at
+   http://www.eclipse.org/legal/epl-v20.html
+and the Eclipse Distribution License is available at
+   http://www.eclipse.org/org/documents/edl-v10.html.
+
+Contributors:
+    Sierra Wireless - initial API and implementation
+ -->
+<configuration>
+	<appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
+		<encoder>
+			<pattern>%d %p %C{0} - %m%n</pattern>
+		</encoder>
+	</appender>
+
+	<root level="WARN">
+		<appender-ref ref="STDOUT" />
+	</root>
+
+	<logger name="org.eclipse.leshan" level="INFO" />
+	<logger name="org.eclipse.leshan.core.californium.LwM2mCoapResource" level="DEBUG"/>
+	<logger name="org.eclipse.leshan.server.security.SecurityCheck" level="DEBUG" />
+	<logger name="org.eclipse.leshan.server.bootstrap.DefaultBootstrapHandler" level="DEBUG" />
+	<logger name="org.eclipse.leshan.core.model.LwM2mModel" level="DEBUG" />
+</configuration>

leshan-client-demo/pom.xml

@@ -38,8 +38,8 @@ Contributors:
 
         <!-- runtime dependencies -->
         <dependency>
-            <groupId>org.slf4j</groupId>
-            <artifactId>slf4j-simple</artifactId>
+            <groupId>ch.qos.logback</groupId>
+            <artifactId>logback-classic</artifactId>
             <scope>runtime</scope>
         </dependency>
 
@@ -61,9 +61,9 @@ Contributors:
                             <mainClass>org.eclipse.leshan.client.demo.LeshanClientDemo</mainClass>
                         </manifest>
                     </archive>
-                    <descriptorRefs>
-                        <descriptorRef>jar-with-dependencies</descriptorRef>
-                    </descriptorRefs>
+                    <descriptors>
+                        <descriptor>../jar-with-dependencies-with-logback.xml</descriptor>
+                    </descriptors>
                 </configuration>
                 <executions>
                     <execution>

leshan-client-demo/src/main/java/org/eclipse/leshan/client/demo/LeshanClientDemo.java

@@ -65,6 +65,14 @@
 
 public class LeshanClientDemo {
 
+    static {
+        // Define a default logback.configurationFile
+        String property = System.getProperty("logback.configurationFile");
+        if (property == null) {
+            System.setProperty("logback.configurationFile", "logback-config.xml");
+        }
+    }
+
     private static final Logger LOG = LoggerFactory.getLogger(LeshanClientDemo.class);
     // /!\ This field is a COPY of org.eclipse.leshan.server.demo.LeshanServerDemo.modelPaths /!\
     // TODO create a leshan-demo project ?