WA-5430 replace log4j with slf4j

Author: bogdan_paulon

pom.xml

@@ -49,6 +49,12 @@
       <version>${project.version}</version>
       <scope>provided</scope>
     </dependency>
+     <dependency>
+      <groupId>org.projectlombok</groupId>
+      <artifactId>lombok</artifactId>
+      <version>1.18.22</version>
+      <scope>provided</scope>
+    </dependency>
   </dependencies>
 
   <build>

src/main/java/com/oxygenxml/charpicker/SpecialCharServlet.java

@@ -20,12 +20,12 @@
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
 
-import org.apache.log4j.Logger;
-
 import com.fasterxml.jackson.databind.ObjectMapper;
 
+import lombok.extern.slf4j.Slf4j;
 import ro.sync.ecss.extensions.api.webapp.plugin.WebappServletPluginExtension;
 
+@Slf4j
 public class SpecialCharServlet extends WebappServletPluginExtension {
 
 	private static int maxResults = 500;
@@ -35,8 +35,6 @@ public class SpecialCharServlet extends WebappServletPluginExtension {
 
 	private Map<String, Properties> charsMap = new HashMap<>(); 
 
-	private static final Logger logger = Logger.getLogger(SpecialCharServlet.class.getName());
-	
 	private static final List<String> supportedLanguages = Arrays.asList("en", "fr", "de", "ja", "nl");
 
 
@@ -50,7 +48,7 @@ public void init() throws ServletException {
 	      try {
 	        newProps.load(charsInputStream);
 	      } catch (IOException e) {
-	        logger.error("could not load the special character file");
+	        log.error("could not load the special character file");
 	      }
 
 	      charsMap.put(lang, newProps);