Fix sonar issues in drools-pdp

Address sonar issue, "Move constants to a class or enum", by
moving them from interfaces to classes:
  ActiveStandbyFeatureApi
  StateManagementFeatureApi
  PolicyResourceLockFeatureApi
  PolicySessionFeatureApi
  DroolsController
  DroolsControllerFeatureApi
  PolicyControllerFeatureApi
  PolicyEngineFeatureApi
  HealthCheck
  SystemPersistence
  EventProtocolCoder
  PolicyController
  PolicyEngine
  TestTransaction
  MdcTransaction
Address sonar issue, "Move constants to a class or enum", by
change the interface to a class:
  DroolsProperties
Address sonar issue, "Override the "equals" method in this class", by
adding equals & hashCode to:
  DroolsPdpEntity
  DroolsPdpImpl
Use lombok for a number of getters & setters.
Address sonar issue, "Define a constant instead of duplicating this
literal" in:
  DroolsPdpsElectionHandler
  JpaDroolsPdpsConnector
  MavenDroolsController
  GenericEventProtocolCoder
  GsonProtocolCoderToolset
  RestManager
Address sonar issue, "Remove the parentheses around the parameter" in:
  MavenDroolsController
Address sonar issue, "Replace this lambda with a method reference" in:
  LifecycleFsm
Address sonar issue, "Move this constructor to comply with Java Code
Conventions" in:
  LifecycleStateRunning
Address sonar issue, "Replace this 'switch' statement by 'if'
statements to increase readability", as specified in:
  PolicyEngineManager
Address sonar issue, "Rename field to prevent any misunderstanding/clash
with field" in:
  MdcTransactionImpl
Address sonar issue, "Either log or rethrow this exception", in:
  RestManager
Address sonar issue, "Rename this constant name to" uppercase, by
replacing enums with static lists in:
  RestManager
Addressed review comments:
  Fixed license dates.
  Renamed getSiteName/setSiteName methods to getSite/setSite in
  the interface to match the field names in the implementation
  classes.
  Renamed *Instance classes to *Constants.
  Next round of review comments.

Change-Id: I1c26af9f194833dd773f2b25dc5f60cde163201c
Issue-ID: POLICY-1968
Signed-off-by: Jim Hahn <jrh3@att.com>

2 files changed, 70 insertions, 40 deletions

diff --git a/api-state-management/src/main/java/org/onap/policy/drools/statemanagement/StateManagementFeatureApi.java b/api-state-management/src/main/java/org/onap/policy/drools/statemanagement/StateManagementFeatureApi.java
index dcb784e3..d2c7b390 100644
--- a/api-state-management/src/main/java/org/onap/policy/drools/statemanagement/StateManagementFeatureApi.java
+++ b/api-state-management/src/main/java/org/onap/policy/drools/statemanagement/StateManagementFeatureApi.java
@@ -21,14 +21,10 @@
 package org.onap.policy.drools.statemanagement;
 
 import java.util.Observer;
-
 import javax.validation.constraints.NotNull;
-
 import org.onap.policy.common.capabilities.Lockable;
 import org.onap.policy.common.im.AllSeemsWellException;
-import org.onap.policy.common.im.StateManagement;
 import org.onap.policy.common.utils.services.OrderedService;
-import org.onap.policy.common.utils.services.OrderedServiceImpl;
 
 /**
  * This interface provides a way to invoke optional features at various points in the code. At
@@ -38,42 +34,6 @@ import org.onap.policy.common.utils.services.OrderedServiceImpl;
  */
 public interface StateManagementFeatureApi extends OrderedService, Lockable {
 
-    public static final String LOCKED = StateManagement.LOCKED;
-    public static final String UNLOCKED = StateManagement.UNLOCKED;
-    public static final String ENABLED = StateManagement.ENABLED;
-    public static final String DISABLED = StateManagement.DISABLED;
-    public static final String ENABLE_NOT_FAILED = StateManagement.ENABLE_NOT_FAILED_ACTION;
-    public static final String DISABLE_FAILED = StateManagement.DISABLE_FAILED_ACTION;
-    public static final String FAILED = StateManagement.FAILED;
-    public static final String DEPENDENCY = StateManagement.DEPENDENCY;
-    public static final String DEPENDENCY_FAILED = StateManagement.DEPENDENCY_FAILED;
-    public static final String DISABLE_DEPENDENCY = StateManagement.DISABLE_DEPENDENCY_ACTION;
-    public static final String ENABLE_NO_DEPENDENCY = StateManagement.ENABLE_NO_DEPENDENCY_ACTION;
-    public static final String NULL_VALUE = StateManagement.NULL_VALUE;
-    public static final String DO_LOCK = StateManagement.LOCK_ACTION;
-    public static final String DO_UNLOCK = StateManagement.UNLOCK_ACTION;
-    public static final String DO_PROMOTE = StateManagement.PROMOTE_ACTION;
-    public static final String DO_DEMOTE = StateManagement.DEMOTE_ACTION;
-    public static final String HOT_STANDBY = StateManagement.HOT_STANDBY;
-    public static final String COLD_STANDBY = StateManagement.COLD_STANDBY;
-    public static final String PROVIDING_SERVICE = StateManagement.PROVIDING_SERVICE;
-
-    public static final String ADMIN_STATE = StateManagement.ADMIN_STATE;
-    public static final String OPERATION_STATE = StateManagement.OPERATION_STATE;
-    public static final String AVAILABLE_STATUS = StateManagement.AVAILABLE_STATUS;
-    public static final String STANDBY_STATUS = StateManagement.STANDBY_STATUS;
-
-    public static final Boolean ALLSEEMSWELL_STATE = Boolean.TRUE;
-    public static final Boolean ALLNOTWELL_STATE = Boolean.FALSE;
-
-    public static final int SEQ_NUM = 0;
-    /**
-     * 'FeatureAPI.impl.getList()' returns an ordered list of objects implementing the 'FeatureAPI'
-     * interface.
-     */
-    public static OrderedServiceImpl<StateManagementFeatureApi> impl =
-            new OrderedServiceImpl<>(StateManagementFeatureApi.class);
-
     /**
      * ALL SEEMS/NOT WELL This interface is used to support the concept of All Seems/Not Well. It
      * provides a way for client code to indicate to the DroolsPDPIntegrityMonitor that an event has
diff --git a/api-state-management/src/main/java/org/onap/policy/drools/statemanagement/StateManagementFeatureApiConstants.java b/api-state-management/src/main/java/org/onap/policy/drools/statemanagement/StateManagementFeatureApiConstants.java
new file mode 100644
index 00000000..be51a502
--- /dev/null
+++ b/api-state-management/src/main/java/org/onap/policy/drools/statemanagement/StateManagementFeatureApiConstants.java
@@ -0,0 +1,70 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * policy-core
+ * ================================================================================
+ * Copyright (C) 2019 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.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.drools.statemanagement;
+
+import lombok.Getter;
+import org.onap.policy.common.im.StateManagement;
+import org.onap.policy.common.utils.services.OrderedServiceImpl;
+
+public class StateManagementFeatureApiConstants {
+
+    public static final String LOCKED = StateManagement.LOCKED;
+    public static final String UNLOCKED = StateManagement.UNLOCKED;
+    public static final String ENABLED = StateManagement.ENABLED;
+    public static final String DISABLED = StateManagement.DISABLED;
+    public static final String ENABLE_NOT_FAILED = StateManagement.ENABLE_NOT_FAILED_ACTION;
+    public static final String DISABLE_FAILED = StateManagement.DISABLE_FAILED_ACTION;
+    public static final String FAILED = StateManagement.FAILED;
+    public static final String DEPENDENCY = StateManagement.DEPENDENCY;
+    public static final String DEPENDENCY_FAILED = StateManagement.DEPENDENCY_FAILED;
+    public static final String DISABLE_DEPENDENCY = StateManagement.DISABLE_DEPENDENCY_ACTION;
+    public static final String ENABLE_NO_DEPENDENCY = StateManagement.ENABLE_NO_DEPENDENCY_ACTION;
+    public static final String NULL_VALUE = StateManagement.NULL_VALUE;
+    public static final String DO_LOCK = StateManagement.LOCK_ACTION;
+    public static final String DO_UNLOCK = StateManagement.UNLOCK_ACTION;
+    public static final String DO_PROMOTE = StateManagement.PROMOTE_ACTION;
+    public static final String DO_DEMOTE = StateManagement.DEMOTE_ACTION;
+    public static final String HOT_STANDBY = StateManagement.HOT_STANDBY;
+    public static final String COLD_STANDBY = StateManagement.COLD_STANDBY;
+    public static final String PROVIDING_SERVICE = StateManagement.PROVIDING_SERVICE;
+
+    public static final String ADMIN_STATE = StateManagement.ADMIN_STATE;
+    public static final String OPERATION_STATE = StateManagement.OPERATION_STATE;
+    public static final String AVAILABLE_STATUS = StateManagement.AVAILABLE_STATUS;
+    public static final String STANDBY_STATUS = StateManagement.STANDBY_STATUS;
+
+    public static final Boolean ALLSEEMSWELL_STATE = Boolean.TRUE;
+    public static final Boolean ALLNOTWELL_STATE = Boolean.FALSE;
+
+    public static final int SEQ_NUM = 0;
+
+    /**
+     * 'FeatureAPI.impl.getList()' returns an ordered list of objects implementing the 'FeatureAPI'
+     * interface.
+     */
+    @Getter
+    private static final OrderedServiceImpl<StateManagementFeatureApi> impl =
+            new OrderedServiceImpl<>(StateManagementFeatureApi.class);
+
+    private StateManagementFeatureApiConstants() {
+        // do nothing
+    }
+}