Add "special" Operation classes for new usecases

Created place-holder for new "usecases" controller.  Note: as of yet,
this is still just a normal java project; it will be turned into a
full-fledged kie-based controller in a later review.
Added some Operation and a few other support classes that will be
needed.
Note: the detmTarget() method and it's various supporting methods,
detmXxx(), found in GetTargetEntityOperation2 were cloned from the
pre-existing ControlLoopOperationManager2 class, and modified to fit the
strategy of the new controller.  Likewise for the junit tests of those
methods.

Issue-ID: POLICY-2748
Change-Id: Idffa135a11a56bd6afdd2728706fd40168e80912
Signed-off-by: Jim Hahn <jrh3@att.com>

2 files changed, 21 insertions, 8 deletions

diff --git a/controlloop/common/eventmanager/src/main/java/org/onap/policy/controlloop/eventmanager/Step.java b/controlloop/common/eventmanager/src/main/java/org/onap/policy/controlloop/eventmanager/Step.java
index 01c64e5bc..ae51c737f 100644
--- a/controlloop/common/eventmanager/src/main/java/org/onap/policy/controlloop/eventmanager/Step.java
+++ b/controlloop/common/eventmanager/src/main/java/org/onap/policy/controlloop/eventmanager/Step.java
@@ -55,12 +55,20 @@ public class Step {
     private final AtomicReference<Instant> startTime;
 
     /**
-     * {@code True} if this step is for the policy's actual operation, {@code false} if it's a preprocessor step.
+     * {@code True} if this step is for the policy's actual operation, {@code false} if
+     * it's a preprocessor step.
      */
     @Getter
     private final boolean policyStep;
 
     /**
+     * The parent step from which this was constructed, or {@code null} if is was not
+     * constructed from another step.
+     */
+    @Getter
+    private final Step parentStep;
+
+    /**
      * The operation for this step.
      */
     @Getter
@@ -73,7 +81,8 @@ public class Step {
 
 
     /**
-     * Constructs the object.  This is used when constructing the step for the policy's actual operation.
+     * Constructs the object. This is used when constructing the step for the policy's
+     * actual operation.
      *
      * @param params operation parameters
      * @param startTime start time of the first step for the current policy, initially
@@ -83,21 +92,23 @@ public class Step {
         this.params = params;
         this.startTime = startTime;
         this.policyStep = true;
+        this.parentStep = null;
     }
 
     /**
-     * Constructs the object using information from another step.  This is used when constructing a preprocessing
-     * step.
+     * Constructs the object using information from another step. This is used when
+     * constructing a preprocessing step.
      *
-     * @param otherStep step whose information should be used
+     * @param parentStep parent step whose information should be used
      * @param actor actor name
      * @param operation operation name
      */
-    public Step(Step otherStep, String actor, String operation) {
-        this.params = otherStep.params.toBuilder().actor(actor).operation(operation).retry(null).timeoutSec(null)
+    public Step(Step parentStep, String actor, String operation) {
+        this.params = parentStep.params.toBuilder().actor(actor).operation(operation).retry(null).timeoutSec(null)
                         .payload(new LinkedHashMap<>()).build();
-        this.startTime = otherStep.startTime;
+        this.startTime = parentStep.startTime;
         this.policyStep = false;
+        this.parentStep = parentStep;
     }
 
     public String getActorName() {
diff --git a/controlloop/common/eventmanager/src/test/java/org/onap/policy/controlloop/eventmanager/StepTest.java b/controlloop/common/eventmanager/src/test/java/org/onap/policy/controlloop/eventmanager/StepTest.java
index 1472adc18..c4121bb38 100644
--- a/controlloop/common/eventmanager/src/test/java/org/onap/policy/controlloop/eventmanager/StepTest.java
+++ b/controlloop/common/eventmanager/src/test/java/org/onap/policy/controlloop/eventmanager/StepTest.java
@@ -147,6 +147,7 @@ public class StepTest {
     public void testConstructor() {
         assertTrue(step.isPolicyStep());
         assertSame(params, step.getParams());
+        assertNull(step.getParentStep());
 
         // check that it recorded the startTime by starting and checking it
         step.init();
@@ -163,6 +164,7 @@ public class StepTest {
     public void testConstructorWithOtherStep_testInitStartTime_testGetStartTimeRef() {
         Step step2 = new Step(step, "actorB", "operB");
         assertFalse(step2.isPolicyStep());
+        assertSame(step, step2.getParentStep());
 
         ControlLoopOperationParams params2 = step2.getParams();
         assertEquals("actorB", params2.getActor());