#502 Replaced usages of System.out with logger.

service-locator/src/main/java/com/iluwatar/servicelocator/InitContext.java

@@ -22,6 +22,9 @@
  */
 package com.iluwatar.servicelocator;
 
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
 /**
  * For JNDI lookup of services from the web.xml. Will match name of the service name that is being
  * requested and return a newly created service object with the name
@@ -30,6 +33,8 @@ package com.iluwatar.servicelocator;
  */
 public class InitContext {
 
+  private static final Logger LOGGER = LoggerFactory.getLogger(InitContext.class);
+
   /**
    * Perform the lookup based on the service name. The returned object will need to be casted into a
    * {@link Service}
@@ -39,10 +44,10 @@ public class InitContext {
    */
   public Object lookup(String serviceName) {
     if (serviceName.equals("jndi/serviceA")) {
-      System.out.println("Looking up service A and creating new service for A");
+      LOGGER.info("Looking up service A and creating new service for A");
       return new ServiceImpl("jndi/serviceA");
     } else if (serviceName.equals("jndi/serviceB")) {
-      System.out.println("Looking up service B and creating new service for B");
+      LOGGER.info("Looking up service B and creating new service for B");
       return new ServiceImpl("jndi/serviceB");
     } else {
       return null;

service-locator/src/main/java/com/iluwatar/servicelocator/ServiceCache.java

@@ -22,6 +22,9 @@
  */
 package com.iluwatar.servicelocator;
 
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
 import java.util.HashMap;
 import java.util.Map;
 
@@ -35,6 +38,8 @@ import java.util.Map;
  */
 public class ServiceCache {
 
+  private static final Logger LOGGER = LoggerFactory.getLogger(ServiceCache.class);
+
   private final Map<String, Service> serviceCache;
 
   public ServiceCache() {
@@ -52,8 +57,8 @@ public class ServiceCache {
     for (String serviceJndiName : serviceCache.keySet()) {
       if (serviceJndiName.equals(serviceName)) {
         cachedService = serviceCache.get(serviceJndiName);
-        System.out.println("(cache call) Fetched service " + cachedService.getName() + "("
-            + cachedService.getId() + ") from cache... !");
+        LOGGER.info("(cache call) Fetched service {}({}) from cache... !",
+                cachedService.getName(), cachedService.getId());
       }
     }
     return cachedService;

service-locator/src/main/java/com/iluwatar/servicelocator/ServiceImpl.java

@@ -22,6 +22,9 @@
  */
 package com.iluwatar.servicelocator;
 
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
 /**
  * This is a single service implementation of a sample service. This is the actual service that will
  * process the request. The reference for this service is to be looked upon in the JNDI server that
@@ -31,6 +34,8 @@ package com.iluwatar.servicelocator;
  */
 public class ServiceImpl implements Service {
 
+  private static final Logger LOGGER = LoggerFactory.getLogger(ServiceImpl.class);
+
   private final String serviceName;
   private final int id;
 
@@ -57,6 +62,6 @@ public class ServiceImpl implements Service {
 
   @Override
   public void execute() {
-    System.out.println("Service " + getName() + " is now executing with id " + getId());
+    LOGGER.info("Service {} is now executing with id {}", getName(), getId());
   }
 }