ItEr29S03ContornaItEr28S03: Activates logging in embedded jetty.

The configuration uses log4 and INFO loggin level.

pom.xml

@@ -471,6 +471,7 @@
                 <directory>../src/main/jetty</directory>
                 <includes>
                     <include>jetty-env.xml</include>
+                    <include>log4j.properties</include>
                 </includes>
                 <targetPath>../jetty</targetPath>
                 <filtering>true</filtering>
@@ -585,6 +586,12 @@
                         </connector>
                     </connectors>
                     -->
+                    <systemProperties>
+                        <systemProperty>
+                            <name>log4j.configuration</name>
+                            <value>file:./target/jetty/log4j.properties</value>
+                        </systemProperty>
+                    </systemProperties>
                 </configuration>
 
                 <dependencies>

src/main/jetty/log4j.properties

@@ -0,0 +1,10 @@
+et root logger level to DEBUG and its only appender to A1.
+log4j.rootLogger=INFO, A1
+
+# A1 is set to be a ConsoleAppender.
+log4j.appender.A1=org.apache.log4j.ConsoleAppender
+
+# A1 uses PatternLayout.
+log4j.appender.A1.layout=org.apache.log4j.PatternLayout
+log4j.appender.A1.layout.ConversionPattern=%-4r [%t] %-5p %c %x - %m%n
+