Address sonar issues in drools-pdp

Addressed the following sonar issues:
- add "final" to public static fields
- commented code; some were bogus - just updated the comments
  so sonar is happy
- use "{}" instead of string concatenation
- junit should assert something
- when using logger, invoke compute-intensive tasks conditionally
- use superclass name instead of subclass name to access static fields
- don't always return the same value
- remove "transient" from fields of classes that aren't Serializable
- don't nest try/catch blocks
- use appropriate class name in Logger.getLogger()
- use Predicate<T> instead of Function<T,Boolean>
- remove unused parameters from private methods
- either log or throw
- remove duplicate methods
- use remove() TLS instead of set(null)
- null check is implicit in instanceof check
- do something with return value
- don't use volatile
- don't return "null" list; used Optional instead
- add no-arg constructor to non-Serializable superclass
- add callSuper=true for EqualsAndHashCode
- don't declare "throws XXX" where XXX is a subclass of RuntimeException
- remove serialVersionUID field if the class isn't Serializable

Also addressed some eclipse warnings:
- unused fields
- suppress generic typic cast warnings

Issue-ID: POLICY-2305
Change-Id: I906d5bf71c1f86531423e23b3667a585cdba45e1
Signed-off-by: Jim Hahn <jrh3@att.com>

1 files changed, 6 insertions, 4 deletions

diff --git a/feature-controller-logging/src/main/java/org/onap/policy/drools/controller/logging/ControllerLoggingFeature.java b/feature-controller-logging/src/main/java/org/onap/policy/drools/controller/logging/ControllerLoggingFeature.java
index 5e90025f..30f90763 100755
--- a/feature-controller-logging/src/main/java/org/onap/policy/drools/controller/logging/ControllerLoggingFeature.java
+++ b/feature-controller-logging/src/main/java/org/onap/policy/drools/controller/logging/ControllerLoggingFeature.java
@@ -2,7 +2,7 @@
  * ============LICENSE_START=======================================================
  * feature-controller-logging
  * ================================================================================
- * Copyright (C) 2019 AT&T Intellectual Property. All rights reserved.
+ * Copyright (C) 2019-2020 AT&T Intellectual Property. All rights reserved.
  * ================================================================================
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -51,6 +51,8 @@ import org.slf4j.LoggerFactory;
 public class ControllerLoggingFeature
                 implements PolicyEngineFeatureApi, DroolsControllerFeatureApi, PolicyControllerFeatureApi {
 
+    private static final String LINE_SEP = System.lineSeparator();
+
     @Override
     public int getSequenceNumber() {
         return 1000;
@@ -63,7 +65,7 @@ public class ControllerLoggingFeature
     @Override
     public boolean beforeOffer(PolicyController controller, CommInfrastructure protocol, String topic, String event) {
         Logger controllerLogger = LoggerFactory.getLogger(controller.getName());
-        controllerLogger.info("[IN|{}|{}]{}{}", protocol, topic, System.lineSeparator(), event);
+        controllerLogger.info("[IN|{}|{}]{}{}", protocol, topic, LINE_SEP, event);
         return false;
     }
 
@@ -78,7 +80,7 @@ public class ControllerLoggingFeature
             Logger controllerLogger = LoggerFactory
                             .getLogger(PolicyControllerConstants.getFactory().get(controller).getName());
             controllerLogger.info("[OUT|{}|{}]{}{}", sink.getTopicCommInfrastructure(), sink.getTopic(),
-                            System.lineSeparator(), json);
+                            LINE_SEP, json);
         }
         return false;
     }
@@ -92,7 +94,7 @@ public class ControllerLoggingFeature
                     String topic, String event) {
         for (ControllerConfiguration controller : configuration.getControllers()) {
             Logger controllerLogger = LoggerFactory.getLogger(controller.getName());
-            controllerLogger.info("[IN|{}|{}]{}{}", commType, topic, System.lineSeparator(), event);
+            controllerLogger.info("[IN|{}|{}]{}{}", commType, topic, LINE_SEP, event);
         }
         return false;
     }