Remove old implementation of statistics in ACM participants

The old implementation of statistics in ACM-participants
can be removed due the Prometheus metrics support.

Issue-ID: POLICY-4420
Change-Id: I0785b269614aba51f94e71a3fe931541c1918b0c
Signed-off-by: FrancescoFioraEst <francesco.fiora@est.tech>

14 files changed, 5 insertions, 246 deletions

diff --git a/participant/participant-impl/participant-impl-http/src/main/java/org/onap/policy/clamp/acm/participant/http/main/handler/AutomationCompositionElementHandler.java b/participant/participant-impl/participant-impl-http/src/main/java/org/onap/policy/clamp/acm/participant/http/main/handler/AutomationCompositionElementHandler.java
index 89c98400e..6b723750a 100644
--- a/participant/participant-impl/participant-impl-http/src/main/java/org/onap/policy/clamp/acm/participant/http/main/handler/AutomationCompositionElementHandler.java
+++ b/participant/participant-impl/participant-impl-http/src/main/java/org/onap/policy/clamp/acm/participant/http/main/handler/AutomationCompositionElementHandler.java
@@ -75,17 +75,6 @@ public class AutomationCompositionElementHandler implements AutomationCompositio
     private ParticipantIntermediaryApi intermediaryApi;
 
     /**
-     * Handle automationCompositionElement statistics.
-     *
-     * @param automationCompositionElementId automation composition element id
-     */
-    @Override
-    public void handleStatistics(UUID automationCompositionElementId) {
-        // Implementation not needed for http participant
-
-    }
-
-    /**
      * Handle a automation composition element state change.
      *
      * @param automationCompositionElementId the ID of the automation composition element
diff --git a/participant/participant-impl/participant-impl-kubernetes/src/main/java/org/onap/policy/clamp/acm/participant/kubernetes/handler/AutomationCompositionElementHandler.java b/participant/participant-impl/participant-impl-kubernetes/src/main/java/org/onap/policy/clamp/acm/participant/kubernetes/handler/AutomationCompositionElementHandler.java
index 1fb41520f..ba49ff1f9 100644
--- a/participant/participant-impl/participant-impl-kubernetes/src/main/java/org/onap/policy/clamp/acm/participant/kubernetes/handler/AutomationCompositionElementHandler.java
+++ b/participant/participant-impl/participant-impl-kubernetes/src/main/java/org/onap/policy/clamp/acm/participant/kubernetes/handler/AutomationCompositionElementHandler.java
@@ -22,7 +22,6 @@ package org.onap.policy.clamp.acm.participant.kubernetes.handler;
 
 import java.io.IOException;
 import java.lang.invoke.MethodHandles;
-import java.time.Instant;
 import java.util.HashMap;
 import java.util.Map;
 import java.util.UUID;
@@ -40,7 +39,6 @@ import org.onap.policy.clamp.acm.participant.kubernetes.exception.ServiceExcepti
 import org.onap.policy.clamp.acm.participant.kubernetes.helm.PodStatusValidator;
 import org.onap.policy.clamp.acm.participant.kubernetes.models.ChartInfo;
 import org.onap.policy.clamp.acm.participant.kubernetes.service.ChartService;
-import org.onap.policy.clamp.models.acm.concepts.AcElementStatistics;
 import org.onap.policy.clamp.models.acm.concepts.AutomationCompositionElement;
 import org.onap.policy.clamp.models.acm.concepts.AutomationCompositionOrderedState;
 import org.onap.policy.clamp.models.acm.concepts.AutomationCompositionState;
@@ -177,22 +175,4 @@ public class AutomationCompositionElementHandler implements AutomationCompositio
                 ParticipantMessageType.AUTOMATION_COMPOSITION_STATE_CHANGE);
         }
     }
-
-    /**
-     * Overridden method.
-     *
-     * @param automationCompositionElementId automationCompositionElement id
-     * @throws PfModelException in case of error
-     */
-    @Override
-    public synchronized void handleStatistics(UUID automationCompositionElementId) throws PfModelException {
-        var acElement = intermediaryApi.getAutomationCompositionElement(automationCompositionElementId);
-        if (acElement != null) {
-            var acElementStatistics = new AcElementStatistics();
-            acElementStatistics.setState(acElement.getState());
-            acElementStatistics.setTimeStamp(Instant.now());
-            intermediaryApi.updateAutomationCompositionElementStatistics(automationCompositionElementId,
-                acElementStatistics);
-        }
-    }
 }
diff --git a/participant/participant-impl/participant-impl-kubernetes/src/test/java/org/onap/policy/clamp/acm/participant/kubernetes/handler/AutomationCompositionElementHandlerTest.java b/participant/participant-impl/participant-impl-kubernetes/src/test/java/org/onap/policy/clamp/acm/participant/kubernetes/handler/AutomationCompositionElementHandlerTest.java
index 5b45cf105..fbd18ef67 100644
--- a/participant/participant-impl/participant-impl-kubernetes/src/test/java/org/onap/policy/clamp/acm/participant/kubernetes/handler/AutomationCompositionElementHandlerTest.java
+++ b/participant/participant-impl/participant-impl-kubernetes/src/test/java/org/onap/policy/clamp/acm/participant/kubernetes/handler/AutomationCompositionElementHandlerTest.java
@@ -28,7 +28,6 @@ import static org.mockito.ArgumentMatchers.anyInt;
 import static org.mockito.Mockito.doNothing;
 import static org.mockito.Mockito.doReturn;
 import static org.mockito.Mockito.doThrow;
-import static org.mockito.Mockito.when;
 
 import java.io.File;
 import java.io.IOException;
@@ -160,15 +159,6 @@ class AutomationCompositionElementHandlerTest {
     }
 
     @Test
-    void test_handleStatistics() {
-        UUID elementId1 = UUID.randomUUID();
-        automationCompositionElementHandler.getChartMap().put(elementId1, charts.get(0));
-        when(participantIntermediaryApi.getAutomationCompositionElement(elementId1))
-            .thenReturn(new AutomationCompositionElement());
-        assertDoesNotThrow(() -> automationCompositionElementHandler.handleStatistics(elementId1));
-    }
-
-    @Test
     void test_checkPodStatus() throws ExecutionException, InterruptedException {
         doReturn(result).when(executor).submit(any(Runnable.class), any());
         doReturn("Done").when(result).get();
diff --git a/participant/participant-impl/participant-impl-policy/src/main/java/org/onap/policy/clamp/acm/participant/policy/main/handler/AutomationCompositionElementHandler.java b/participant/participant-impl/participant-impl-policy/src/main/java/org/onap/policy/clamp/acm/participant/policy/main/handler/AutomationCompositionElementHandler.java
index e3679229d..bdf4f8fcf 100644
--- a/participant/participant-impl/participant-impl-policy/src/main/java/org/onap/policy/clamp/acm/participant/policy/main/handler/AutomationCompositionElementHandler.java
+++ b/participant/participant-impl/participant-impl-policy/src/main/java/org/onap/policy/clamp/acm/participant/policy/main/handler/AutomationCompositionElementHandler.java
@@ -22,19 +22,16 @@
 
 package org.onap.policy.clamp.acm.participant.policy.main.handler;
 
-import java.time.Instant;
 import java.util.LinkedHashMap;
 import java.util.Map;
 import java.util.Map.Entry;
 import java.util.UUID;
-import javax.ws.rs.core.Response;
 import lombok.Setter;
 import org.apache.http.HttpStatus;
 import org.onap.policy.clamp.acm.participant.intermediary.api.AutomationCompositionElementListener;
 import org.onap.policy.clamp.acm.participant.intermediary.api.ParticipantIntermediaryApi;
 import org.onap.policy.clamp.acm.participant.policy.client.PolicyApiHttpClient;
 import org.onap.policy.clamp.acm.participant.policy.client.PolicyPapHttpClient;
-import org.onap.policy.clamp.models.acm.concepts.AcElementStatistics;
 import org.onap.policy.clamp.models.acm.concepts.AutomationCompositionElement;
 import org.onap.policy.clamp.models.acm.concepts.AutomationCompositionOrderedState;
 import org.onap.policy.clamp.models.acm.concepts.AutomationCompositionState;
@@ -219,21 +216,4 @@ public class AutomationCompositionElementHandler implements AutomationCompositio
             }
         }
     }
-
-    /**
-     * Handle automationCompositionElement statistics.
-     *
-     * @param automationCompositionElementId automation composition element id
-     */
-    @Override
-    public void handleStatistics(UUID automationCompositionElementId) {
-        var acElement = intermediaryApi.getAutomationCompositionElement(automationCompositionElementId);
-        if (acElement != null) {
-            var acElementStatistics = new AcElementStatistics();
-            acElementStatistics.setState(acElement.getState());
-            acElementStatistics.setTimeStamp(Instant.now());
-            intermediaryApi.updateAutomationCompositionElementStatistics(automationCompositionElementId,
-                acElementStatistics);
-        }
-    }
 }
\ No newline at end of file
diff --git a/participant/participant-impl/participant-impl-policy/src/test/java/org/onap/policy/clamp/acm/participant/policy/main/handler/AutomationCompositionElementHandlerTest.java b/participant/participant-impl/participant-impl-policy/src/test/java/org/onap/policy/clamp/acm/participant/policy/main/handler/AutomationCompositionElementHandlerTest.java
index 454864fd7..34162a29b 100644
--- a/participant/participant-impl/participant-impl-policy/src/test/java/org/onap/policy/clamp/acm/participant/policy/main/handler/AutomationCompositionElementHandlerTest.java
+++ b/participant/participant-impl/participant-impl-policy/src/test/java/org/onap/policy/clamp/acm/participant/policy/main/handler/AutomationCompositionElementHandlerTest.java
@@ -78,9 +78,6 @@ class AutomationCompositionElementHandlerTest {
                 automationCompositionElementId,
                 AutomationCompositionState.PASSIVE,
                 AutomationCompositionOrderedState.RUNNING));
-
-        assertDoesNotThrow(() -> handler
-            .handleStatistics(automationCompositionElementId));
     }
 
     private AutomationCompositionElementHandler getTestingHandler() {
diff --git a/participant/participant-intermediary/src/main/java/org/onap/policy/clamp/acm/participant/intermediary/api/AutomationCompositionElementListener.java b/participant/participant-intermediary/src/main/java/org/onap/policy/clamp/acm/participant/intermediary/api/AutomationCompositionElementListener.java
index 9affd5751..f2832c5b5 100644
--- a/participant/participant-intermediary/src/main/java/org/onap/policy/clamp/acm/participant/intermediary/api/AutomationCompositionElementListener.java
+++ b/participant/participant-intermediary/src/main/java/org/onap/policy/clamp/acm/participant/intermediary/api/AutomationCompositionElementListener.java
@@ -1,6 +1,6 @@
 /*-
  * ============LICENSE_START=======================================================
- *  Copyright (C) 2021 Nordix Foundation.
+ *  Copyright (C) 2021-2022 Nordix Foundation.
  * ================================================================================
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -54,12 +54,4 @@ public interface AutomationCompositionElementListener {
     public void automationCompositionElementUpdate(ToscaConceptIdentifier automationCompositionId,
         AutomationCompositionElement element, ToscaNodeTemplate automationCompositionElementDefinition)
         throws PfModelException;
-
-    /**
-     * Handle automationCompositionElement statistics.
-     *
-     * @param automationCompositionElementId automationCompositionElement id
-     * @throws PfModelException in case of a model exception
-     */
-    public void handleStatistics(UUID automationCompositionElementId) throws PfModelException;
 }
diff --git a/participant/participant-intermediary/src/main/java/org/onap/policy/clamp/acm/participant/intermediary/api/ParticipantIntermediaryApi.java b/participant/participant-intermediary/src/main/java/org/onap/policy/clamp/acm/participant/intermediary/api/ParticipantIntermediaryApi.java
index 79f5259bf..754a8305f 100644
--- a/participant/participant-intermediary/src/main/java/org/onap/policy/clamp/acm/participant/intermediary/api/ParticipantIntermediaryApi.java
+++ b/participant/participant-intermediary/src/main/java/org/onap/policy/clamp/acm/participant/intermediary/api/ParticipantIntermediaryApi.java
@@ -1,6 +1,6 @@
 /*-
  * ============LICENSE_START=======================================================
- *  Copyright (C) 2021 Nordix Foundation.
+ *  Copyright (C) 2021-2022 Nordix Foundation.
  *  Modifications Copyright (C) 2021 AT&T Intellectual Property. All rights reserved.
  * ================================================================================
  * Licensed under the Apache License, Version 2.0 (the "License");
@@ -24,14 +24,12 @@ package org.onap.policy.clamp.acm.participant.intermediary.api;
 import java.util.List;
 import java.util.Map;
 import java.util.UUID;
-import org.onap.policy.clamp.models.acm.concepts.AcElementStatistics;
 import org.onap.policy.clamp.models.acm.concepts.AutomationCompositionElement;
 import org.onap.policy.clamp.models.acm.concepts.AutomationCompositionOrderedState;
 import org.onap.policy.clamp.models.acm.concepts.AutomationCompositionState;
 import org.onap.policy.clamp.models.acm.concepts.AutomationCompositions;
 import org.onap.policy.clamp.models.acm.concepts.Participant;
 import org.onap.policy.clamp.models.acm.concepts.ParticipantState;
-import org.onap.policy.clamp.models.acm.concepts.ParticipantStatistics;
 import org.onap.policy.clamp.models.acm.messages.dmaap.participant.ParticipantMessageType;
 import org.onap.policy.models.tosca.authorative.concepts.ToscaConceptIdentifier;
 import org.onap.policy.models.tosca.authorative.concepts.ToscaProperty;
@@ -76,13 +74,6 @@ public interface ParticipantIntermediaryApi {
     Participant updateParticipantState(ToscaConceptIdentifier definition, ParticipantState state);
 
     /**
-     * Update the statistics of a participant.
-     *
-     * @param participantStatistics the statistics of the participant
-     */
-    void updateParticipantStatistics(ParticipantStatistics participantStatistics);
-
-    /**
      * Get automation compositions from the intermediary API.
      *
      * @param name the automation composition element name, null for all
@@ -119,12 +110,4 @@ public interface ParticipantIntermediaryApi {
     AutomationCompositionElement updateAutomationCompositionElementState(ToscaConceptIdentifier automationCompositionId,
         UUID id, AutomationCompositionOrderedState currentState, AutomationCompositionState newState,
         ParticipantMessageType messageType);
-
-    /**
-     * Update the automation composition element statistics.
-     *
-     * @param id the ID of the automation composition element to update the state on
-     * @param elementStatistics the updated statistics
-     */
-    void updateAutomationCompositionElementStatistics(UUID id, AcElementStatistics elementStatistics);
 }
diff --git a/participant/participant-intermediary/src/main/java/org/onap/policy/clamp/acm/participant/intermediary/api/impl/ParticipantIntermediaryApiImpl.java b/participant/participant-intermediary/src/main/java/org/onap/policy/clamp/acm/participant/intermediary/api/impl/ParticipantIntermediaryApiImpl.java
index 1a1f8500f..e4d921af7 100644
--- a/participant/participant-intermediary/src/main/java/org/onap/policy/clamp/acm/participant/intermediary/api/impl/ParticipantIntermediaryApiImpl.java
+++ b/participant/participant-intermediary/src/main/java/org/onap/policy/clamp/acm/participant/intermediary/api/impl/ParticipantIntermediaryApiImpl.java
@@ -1,6 +1,6 @@
 /*-
  * ============LICENSE_START=======================================================
- *  Copyright (C) 2021 Nordix Foundation.
+ *  Copyright (C) 2021-2022 Nordix Foundation.
  *  Modifications Copyright (C) 2021 AT&T Intellectual Property. All rights reserved.
  * ================================================================================
  * Licensed under the Apache License, Version 2.0 (the "License");
@@ -29,7 +29,6 @@ import org.onap.policy.clamp.acm.participant.intermediary.api.AutomationComposit
 import org.onap.policy.clamp.acm.participant.intermediary.api.ParticipantIntermediaryApi;
 import org.onap.policy.clamp.acm.participant.intermediary.handler.AutomationCompositionHandler;
 import org.onap.policy.clamp.acm.participant.intermediary.handler.ParticipantHandler;
-import org.onap.policy.clamp.models.acm.concepts.AcElementStatistics;
 import org.onap.policy.clamp.models.acm.concepts.AutomationComposition;
 import org.onap.policy.clamp.models.acm.concepts.AutomationCompositionElement;
 import org.onap.policy.clamp.models.acm.concepts.AutomationCompositionOrderedState;
@@ -37,7 +36,6 @@ import org.onap.policy.clamp.models.acm.concepts.AutomationCompositionState;
 import org.onap.policy.clamp.models.acm.concepts.AutomationCompositions;
 import org.onap.policy.clamp.models.acm.concepts.Participant;
 import org.onap.policy.clamp.models.acm.concepts.ParticipantState;
-import org.onap.policy.clamp.models.acm.concepts.ParticipantStatistics;
 import org.onap.policy.clamp.models.acm.messages.dmaap.participant.ParticipantMessageType;
 import org.onap.policy.models.tosca.authorative.concepts.ToscaConceptIdentifier;
 import org.onap.policy.models.tosca.authorative.concepts.ToscaProperty;
@@ -89,11 +87,6 @@ public class ParticipantIntermediaryApiImpl implements ParticipantIntermediaryAp
     }
 
     @Override
-    public void updateParticipantStatistics(ParticipantStatistics participantStatistics) {
-        participantHandler.updateParticipantStatistics(participantStatistics);
-    }
-
-    @Override
     public AutomationCompositions getAutomationCompositions(String name, String version) {
         return automationCompositionHandler.getAutomationCompositions();
     }
@@ -132,9 +125,4 @@ public class ParticipantIntermediaryApiImpl implements ParticipantIntermediaryAp
         return automationCompositionHandler.updateAutomationCompositionElementState(automationCompositionId, id,
             currentState, newState);
     }
-
-    @Override
-    public void updateAutomationCompositionElementStatistics(UUID id, AcElementStatistics elementStatistics) {
-        automationCompositionHandler.updateAutomationCompositionElementStatistics(id, elementStatistics);
-    }
 }
diff --git a/participant/participant-intermediary/src/main/java/org/onap/policy/clamp/acm/participant/intermediary/handler/AutomationCompositionHandler.java b/participant/participant-intermediary/src/main/java/org/onap/policy/clamp/acm/participant/intermediary/handler/AutomationCompositionHandler.java
index 7e1fb5443..4c74e50fe 100644
--- a/participant/participant-intermediary/src/main/java/org/onap/policy/clamp/acm/participant/intermediary/handler/AutomationCompositionHandler.java
+++ b/participant/participant-intermediary/src/main/java/org/onap/policy/clamp/acm/participant/intermediary/handler/AutomationCompositionHandler.java
@@ -1,6 +1,6 @@
 /*-
  * ============LICENSE_START=======================================================
- *  Copyright (C) 2021 Nordix Foundation.
+ *  Copyright (C) 2021-2022 Nordix Foundation.
  *  Modifications Copyright (C) 2021 AT&T Intellectual Property. All rights reserved.
  * ================================================================================
  * Licensed under the Apache License, Version 2.0 (the "License");
@@ -32,7 +32,6 @@ import lombok.Getter;
 import org.onap.policy.clamp.acm.participant.intermediary.api.AutomationCompositionElementListener;
 import org.onap.policy.clamp.acm.participant.intermediary.comm.ParticipantMessagePublisher;
 import org.onap.policy.clamp.acm.participant.intermediary.parameters.ParticipantParameters;
-import org.onap.policy.clamp.models.acm.concepts.AcElementStatistics;
 import org.onap.policy.clamp.models.acm.concepts.AutomationComposition;
 import org.onap.policy.clamp.models.acm.concepts.AutomationCompositionElement;
 import org.onap.policy.clamp.models.acm.concepts.AutomationCompositionElementAck;
@@ -147,21 +146,6 @@ public class AutomationCompositionHandler {
     }
 
     /**
-     * Handle a automation composition element statistics.
-     *
-     * @param id automation composition element id
-     * @param elementStatistics automation composition element Statistics
-     */
-    public void updateAutomationCompositionElementStatistics(UUID id, AcElementStatistics elementStatistics) {
-        var acElement = elementsOnThisParticipant.get(id);
-        if (acElement != null) {
-            elementStatistics.setParticipantId(participantId);
-            elementStatistics.setId(id);
-            acElement.setAcElementStatistics(elementStatistics);
-        }
-    }
-
-    /**
      * Handle a automation composition state change message.
      *
      * @param stateChangeMsg the state change message
diff --git a/participant/participant-intermediary/src/main/java/org/onap/policy/clamp/acm/participant/intermediary/handler/ParticipantHandler.java b/participant/participant-intermediary/src/main/java/org/onap/policy/clamp/acm/participant/intermediary/handler/ParticipantHandler.java
index fa02f3dcf..3362f10d3 100644
--- a/participant/participant-intermediary/src/main/java/org/onap/policy/clamp/acm/participant/intermediary/handler/ParticipantHandler.java
+++ b/participant/participant-intermediary/src/main/java/org/onap/policy/clamp/acm/participant/intermediary/handler/ParticipantHandler.java
@@ -1,6 +1,6 @@
 /*-
  * ============LICENSE_START=======================================================
- *  Copyright (C) 2021 Nordix Foundation.
+ *  Copyright (C) 2021-2022 Nordix Foundation.
  * ================================================================================
  * Modifications Copyright (C) 2021 AT&T Intellectual Property. All rights reserved.
  * ================================================================================
@@ -22,31 +22,22 @@
 
 package org.onap.policy.clamp.acm.participant.intermediary.handler;
 
-import java.time.Instant;
 import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 import java.util.Objects;
 import java.util.UUID;
-import java.util.stream.Collectors;
 import lombok.Getter;
 import lombok.Setter;
-import org.onap.policy.clamp.acm.participant.intermediary.api.AutomationCompositionElementListener;
 import org.onap.policy.clamp.acm.participant.intermediary.comm.ParticipantMessagePublisher;
 import org.onap.policy.clamp.acm.participant.intermediary.parameters.ParticipantParameters;
-import org.onap.policy.clamp.models.acm.concepts.AcElementStatisticsList;
-import org.onap.policy.clamp.models.acm.concepts.AutomationComposition;
-import org.onap.policy.clamp.models.acm.concepts.AutomationCompositionElement;
 import org.onap.policy.clamp.models.acm.concepts.AutomationCompositionElementDefinition;
 import org.onap.policy.clamp.models.acm.concepts.AutomationCompositionInfo;
-import org.onap.policy.clamp.models.acm.concepts.AutomationCompositionStatistics;
-import org.onap.policy.clamp.models.acm.concepts.AutomationCompositions;
 import org.onap.policy.clamp.models.acm.concepts.Participant;
 import org.onap.policy.clamp.models.acm.concepts.ParticipantDefinition;
 import org.onap.policy.clamp.models.acm.concepts.ParticipantHealthStatus;
 import org.onap.policy.clamp.models.acm.concepts.ParticipantState;
-import org.onap.policy.clamp.models.acm.concepts.ParticipantStatistics;
 import org.onap.policy.clamp.models.acm.messages.dmaap.participant.AutomationCompositionStateChange;
 import org.onap.policy.clamp.models.acm.messages.dmaap.participant.AutomationCompositionUpdate;
 import org.onap.policy.clamp.models.acm.messages.dmaap.participant.ParticipantAckMessage;
@@ -59,7 +50,6 @@ import org.onap.policy.clamp.models.acm.messages.dmaap.participant.ParticipantSt
 import org.onap.policy.clamp.models.acm.messages.dmaap.participant.ParticipantStatusReq;
 import org.onap.policy.clamp.models.acm.messages.dmaap.participant.ParticipantUpdate;
 import org.onap.policy.clamp.models.acm.messages.dmaap.participant.ParticipantUpdateAck;
-import org.onap.policy.models.base.PfModelException;
 import org.onap.policy.models.tosca.authorative.concepts.ToscaConceptIdentifier;
 import org.onap.policy.models.tosca.authorative.concepts.ToscaProperty;
 import org.slf4j.Logger;
@@ -80,7 +70,6 @@ public class ParticipantHandler {
     private final ToscaConceptIdentifier participantId;
 
     private final AutomationCompositionHandler automationCompositionHandler;
-    private final ParticipantStatistics participantStatistics;
     private final ParticipantMessagePublisher publisher;
 
     @Setter
@@ -103,11 +92,6 @@ public class ParticipantHandler {
         this.participantId = parameters.getIntermediaryParameters().getParticipantId();
         this.publisher = publisher;
         this.automationCompositionHandler = automationCompositionHandler;
-        this.participantStatistics = new ParticipantStatistics();
-        this.participantStatistics.setParticipantId(participantId);
-        this.participantStatistics.setState(state);
-        this.participantStatistics.setHealthStatus(healthStatus);
-        this.participantStatistics.setTimeStamp(Instant.now());
     }
 
     /**
@@ -121,29 +105,6 @@ public class ParticipantHandler {
     }
 
     /**
-     * Update AutomationCompositionElement statistics. The automation composition elements listening will be
-     * notified to retrieve statistics from respective automation composition elements, and automation
-     * compositionelements
-     * data on the handler will be updated.
-     *
-     * @param automationCompositions the automation compositions
-     * @param acElementListener automation composition element listener
-     */
-    private void updateAcElementStatistics(AutomationCompositions automationCompositions,
-        AutomationCompositionElementListener acElementListener) {
-        for (AutomationComposition automationComposition : automationCompositions.getAutomationCompositionList()) {
-            for (AutomationCompositionElement element : automationComposition.getElements().values()) {
-                try {
-                    acElementListener.handleStatistics(element.getId());
-                } catch (PfModelException e) {
-                    LOGGER.debug("Getting statistics for automation composition element failed for element ID {}",
-                        element.getId(), e);
-                }
-            }
-        }
-    }
-
-    /**
      * Handle a automation composition update message.
      *
      * @param updateMsg the update message
@@ -193,19 +154,6 @@ public class ParticipantHandler {
     }
 
     /**
-     * Method to update participant statistics.
-     *
-     * @param statistics participant statistics
-     */
-    public void updateParticipantStatistics(ParticipantStatistics statistics) {
-        participantStatistics.setState(statistics.getState());
-        participantStatistics.setHealthStatus(statistics.getHealthStatus());
-        participantStatistics.setTimeStamp(statistics.getTimeStamp());
-        participantStatistics.setAverageExecutionTime(statistics.getAverageExecutionTime());
-        participantStatistics.setEventCount(statistics.getEventCount());
-    }
-
-    /**
      * Get participants as a {@link Participant} class.
      *
      * @param name the participant name to get
@@ -366,19 +314,8 @@ public class ParticipantHandler {
      * Method to send heartbeat to automation composition runtime.
      */
     public ParticipantStatus makeHeartbeat(boolean responseToParticipantStatusReq) {
-        if (!responseToParticipantStatusReq) {
-            var automationCompositions = automationCompositionHandler.getAutomationCompositions();
-            for (var acElementListener : automationCompositionHandler.getListeners()) {
-                updateAcElementStatistics(automationCompositions, acElementListener);
-            }
-        }
-        this.participantStatistics.setState(state);
-        this.participantStatistics.setHealthStatus(healthStatus);
-        this.participantStatistics.setTimeStamp(Instant.now());
-
         var heartbeat = new ParticipantStatus();
         heartbeat.setParticipantId(participantId);
-        heartbeat.setParticipantStatistics(participantStatistics);
         heartbeat.setParticipantType(participantType);
         heartbeat.setHealthStatus(healthStatus);
         heartbeat.setState(state);
@@ -400,14 +337,6 @@ public class ParticipantHandler {
         for (var entry : automationCompositionHandler.getAutomationCompositionMap().entrySet()) {
             var acInfo = new AutomationCompositionInfo();
             acInfo.setAutomationCompositionId(entry.getKey());
-            var acStatitistics = new AutomationCompositionStatistics();
-            acStatitistics.setAutomationCompositionId(entry.getKey());
-            var acElementStatisticsList = new AcElementStatisticsList();
-            acElementStatisticsList.setAcElementStatistics(entry.getValue().getElements().values().stream()
-                .map(AutomationCompositionElement::getAcElementStatistics).filter(Objects::nonNull)
-                .collect(Collectors.toList()));
-            acStatitistics.setAcElementStatisticsList(acElementStatisticsList);
-            acInfo.setAutomationCompositionStatistics(acStatitistics);
             acInfo.setState(entry.getValue().getState());
             automationCompositionInfoList.add(acInfo);
         }
diff --git a/participant/participant-intermediary/src/test/java/org/onap/policy/clamp/acm/participant/intermediary/api/impl/ParticipantIntermediaryApiImplTest.java b/participant/participant-intermediary/src/test/java/org/onap/policy/clamp/acm/participant/intermediary/api/impl/ParticipantIntermediaryApiImplTest.java
index a8116c078..0d631ad04 100644
--- a/participant/participant-intermediary/src/test/java/org/onap/policy/clamp/acm/participant/intermediary/api/impl/ParticipantIntermediaryApiImplTest.java
+++ b/participant/participant-intermediary/src/test/java/org/onap/policy/clamp/acm/participant/intermediary/api/impl/ParticipantIntermediaryApiImplTest.java
@@ -25,18 +25,14 @@ import static org.junit.jupiter.api.Assertions.assertEquals;
 import static org.junit.jupiter.api.Assertions.assertFalse;
 import static org.junit.jupiter.api.Assertions.assertNotNull;
 
-import java.time.Instant;
 import java.util.UUID;
 import org.junit.jupiter.api.Test;
 import org.mockito.Mockito;
 import org.onap.policy.clamp.acm.participant.intermediary.api.AutomationCompositionElementListener;
 import org.onap.policy.clamp.acm.participant.intermediary.main.parameters.CommonTestData;
-import org.onap.policy.clamp.models.acm.concepts.AcElementStatistics;
 import org.onap.policy.clamp.models.acm.concepts.AutomationCompositionOrderedState;
 import org.onap.policy.clamp.models.acm.concepts.AutomationCompositionState;
-import org.onap.policy.clamp.models.acm.concepts.ParticipantHealthStatus;
 import org.onap.policy.clamp.models.acm.concepts.ParticipantState;
-import org.onap.policy.clamp.models.acm.concepts.ParticipantStatistics;
 import org.onap.policy.clamp.models.acm.messages.dmaap.participant.ParticipantMessageType;
 import org.onap.policy.common.utils.coder.CoderException;
 import org.onap.policy.models.tosca.authorative.concepts.ToscaConceptIdentifier;
@@ -66,13 +62,6 @@ class ParticipantIntermediaryApiImplTest {
         assertNotNull(apiImpl.getAutomationCompositions(id.getName(), id.getVersion()));
         assertThat(apiImpl.getAcElementDefinitionCommonProperties(id)).isEmpty();
 
-        var participantStatistics = new ParticipantStatistics();
-        participantStatistics.setParticipantId(id);
-        participantStatistics.setTimeStamp(Instant.ofEpochMilli(123456L));
-        participantStatistics.setState(ParticipantState.PASSIVE);
-        participantStatistics.setHealthStatus(ParticipantHealthStatus.HEALTHY);
-        apiImpl.updateParticipantStatistics(participantStatistics);
-
         var participants = apiImpl.getParticipants(id.getName(), id.getVersion());
         assertEquals(ParticipantState.UNKNOWN, participants.get(0).getParticipantState());
 
@@ -86,13 +75,6 @@ class ParticipantIntermediaryApiImplTest {
         var idType = new ToscaConceptIdentifier(ID_NAME_TYPE, ID_VERSION_TYPE);
         assertEquals(idType, element.getParticipantType());
 
-        var acElementStatistics = new AcElementStatistics();
-        var automationCompositionId = new ToscaConceptIdentifier("defName", "0.0.1");
-        acElementStatistics.setParticipantId(automationCompositionId);
-        acElementStatistics.setState(AutomationCompositionState.RUNNING);
-        acElementStatistics.setTimeStamp(Instant.now());
-
-        apiImpl.updateAutomationCompositionElementStatistics(uuid, acElementStatistics);
         var acElement =
             apiImpl.updateAutomationCompositionElementState(id, uuid, AutomationCompositionOrderedState.UNINITIALISED,
                 AutomationCompositionState.PASSIVE, ParticipantMessageType.AUTOMATION_COMPOSITION_STATECHANGE_ACK);
diff --git a/participant/participant-intermediary/src/test/java/org/onap/policy/clamp/acm/participant/intermediary/handler/AutomationCompositionHandlerTest.java b/participant/participant-intermediary/src/test/java/org/onap/policy/clamp/acm/participant/intermediary/handler/AutomationCompositionHandlerTest.java
index c8432f230..06b4256a7 100644
--- a/participant/participant-intermediary/src/test/java/org/onap/policy/clamp/acm/participant/intermediary/handler/AutomationCompositionHandlerTest.java
+++ b/participant/participant-intermediary/src/test/java/org/onap/policy/clamp/acm/participant/intermediary/handler/AutomationCompositionHandlerTest.java
@@ -23,7 +23,6 @@ package org.onap.policy.clamp.acm.participant.intermediary.handler;
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.junit.jupiter.api.Assertions.assertDoesNotThrow;
 import static org.junit.jupiter.api.Assertions.assertEquals;
-import static org.junit.jupiter.api.Assertions.assertNotEquals;
 import static org.junit.jupiter.api.Assertions.assertNotNull;
 import static org.junit.jupiter.api.Assertions.assertNull;
 import static org.mockito.Mockito.mock;
@@ -35,7 +34,6 @@ import org.junit.jupiter.api.Test;
 import org.junit.jupiter.api.extension.ExtendWith;
 import org.onap.policy.clamp.acm.participant.intermediary.api.AutomationCompositionElementListener;
 import org.onap.policy.clamp.acm.participant.intermediary.main.parameters.CommonTestData;
-import org.onap.policy.clamp.models.acm.concepts.AcElementStatistics;
 import org.onap.policy.clamp.models.acm.concepts.AutomationCompositionElement;
 import org.onap.policy.clamp.models.acm.concepts.AutomationCompositionElementDefinition;
 import org.onap.policy.clamp.models.acm.concepts.AutomationCompositionOrderedState;
@@ -84,16 +82,6 @@ class AutomationCompositionHandlerTest {
 
         assertNull(ach.updateAutomationCompositionElementState(null, id,
             AutomationCompositionOrderedState.UNINITIALISED, AutomationCompositionState.PASSIVE));
-
-        var acElementStatistics = new AcElementStatistics();
-        var automationCompositionId = new ToscaConceptIdentifier("defName", "0.0.1");
-        acElementStatistics.setParticipantId(automationCompositionId);
-        acElementStatistics.setState(AutomationCompositionState.RUNNING);
-        acElementStatistics.setTimeStamp(Instant.now());
-
-        ach.updateAutomationCompositionElementStatistics(id, acElementStatistics);
-        assertNull(ach.updateAutomationCompositionElementState(automationCompositionId, id,
-            AutomationCompositionOrderedState.UNINITIALISED, AutomationCompositionState.PASSIVE));
     }
 
     @Test
@@ -114,15 +102,6 @@ class AutomationCompositionHandlerTest {
             AutomationCompositionState.RUNNING);
         assertEquals(AutomationCompositionState.RUNNING, value.getState());
 
-        var acElementStatistics = new AcElementStatistics();
-        acElementStatistics.setParticipantId(id);
-        acElementStatistics.setState(AutomationCompositionState.RUNNING);
-        acElementStatistics.setTimeStamp(Instant.now());
-
-        assertNotEquals(uuid, value.getAcElementStatistics().getId());
-        ach.updateAutomationCompositionElementStatistics(uuid, acElementStatistics);
-        assertEquals(uuid, value.getAcElementStatistics().getId());
-
         ach.getElementsOnThisParticipant().remove(key, value);
         ach.getAutomationCompositionMap().values().iterator().next().getElements().clear();
         assertNull(ach.updateAutomationCompositionElementState(id, key, AutomationCompositionOrderedState.PASSIVE,
diff --git a/participant/participant-intermediary/src/test/java/org/onap/policy/clamp/acm/participant/intermediary/handler/ParticipantHandlerTest.java b/participant/participant-intermediary/src/test/java/org/onap/policy/clamp/acm/participant/intermediary/handler/ParticipantHandlerTest.java
index 04742d8b3..a87d8e1aa 100644
--- a/participant/participant-intermediary/src/test/java/org/onap/policy/clamp/acm/participant/intermediary/handler/ParticipantHandlerTest.java
+++ b/participant/participant-intermediary/src/test/java/org/onap/policy/clamp/acm/participant/intermediary/handler/ParticipantHandlerTest.java
@@ -88,7 +88,6 @@ class ParticipantHandlerTest {
 
         var heartbeatF = participantHandler.makeHeartbeat(false);
         assertEquals(id, heartbeatF.getParticipantId());
-        assertEquals(ParticipantState.UNKNOWN, heartbeatF.getParticipantStatistics().getState());
         assertThat(heartbeatF.getAutomationCompositionInfoList()).isEmpty();
 
         participantHandler.handleParticipantUpdate(participantUpdateMsg);
@@ -96,7 +95,6 @@ class ParticipantHandlerTest {
 
         var heartbeatT = participantHandler.makeHeartbeat(true);
         assertEquals(id, heartbeatT.getParticipantId());
-        assertEquals(ParticipantState.TERMINATED, heartbeatT.getParticipantStatistics().getState());
         assertThat(heartbeatT.getParticipantDefinitionUpdates()).isNotEmpty();
         assertEquals(id, heartbeatT.getParticipantDefinitionUpdates().get(0).getParticipantId());
 
@@ -104,8 +102,6 @@ class ParticipantHandlerTest {
         participantHandler.handleParticipantUpdate(pum);
         var heartbeatTAfterUpdate = participantHandler.makeHeartbeat(true);
         assertEquals(id, heartbeatTAfterUpdate.getParticipantId());
-        assertEquals(ParticipantState.PASSIVE, heartbeatTAfterUpdate.getParticipantStatistics().getState());
-
     }
 
     private ParticipantUpdate setListParticipantDefinition(ParticipantUpdate participantUpdateMsg) {
diff --git a/participant/participant-intermediary/src/test/java/org/onap/policy/clamp/acm/participant/intermediary/main/parameters/CommonTestData.java b/participant/participant-intermediary/src/test/java/org/onap/policy/clamp/acm/participant/intermediary/main/parameters/CommonTestData.java
index a5aa2f48a..91552ee34 100644
--- a/participant/participant-intermediary/src/test/java/org/onap/policy/clamp/acm/participant/intermediary/main/parameters/CommonTestData.java
+++ b/participant/participant-intermediary/src/test/java/org/onap/policy/clamp/acm/participant/intermediary/main/parameters/CommonTestData.java
@@ -21,7 +21,6 @@
 package org.onap.policy.clamp.acm.participant.intermediary.main.parameters;
 
 import java.io.File;
-import java.time.Instant;
 import java.util.Collections;
 import java.util.LinkedHashMap;
 import java.util.List;
@@ -34,11 +33,9 @@ import org.onap.policy.clamp.acm.participant.intermediary.handler.AutomationComp
 import org.onap.policy.clamp.acm.participant.intermediary.handler.DummyParticipantParameters;
 import org.onap.policy.clamp.acm.participant.intermediary.handler.ParticipantHandler;
 import org.onap.policy.clamp.acm.participant.intermediary.parameters.ParticipantIntermediaryParameters;
-import org.onap.policy.clamp.models.acm.concepts.AcElementStatistics;
 import org.onap.policy.clamp.models.acm.concepts.AutomationComposition;
 import org.onap.policy.clamp.models.acm.concepts.AutomationCompositionElement;
 import org.onap.policy.clamp.models.acm.concepts.AutomationCompositionOrderedState;
-import org.onap.policy.clamp.models.acm.concepts.AutomationCompositionState;
 import org.onap.policy.clamp.models.acm.concepts.AutomationCompositions;
 import org.onap.policy.clamp.models.acm.messages.dmaap.participant.ParticipantDeregisterAck;
 import org.onap.policy.common.endpoints.event.comm.TopicSink;
@@ -256,13 +253,6 @@ public class CommonTestData {
         acElement.setDefinition(id);
         acElement.setOrderedState(AutomationCompositionOrderedState.UNINITIALISED);
 
-        var acElementStatistics = new AcElementStatistics();
-        acElementStatistics.setParticipantId(id);
-        acElementStatistics.setState(AutomationCompositionState.UNINITIALISED);
-        acElementStatistics.setTimeStamp(Instant.now());
-
-        acElement.setAcElementStatistics(acElementStatistics);
-
         Map<UUID, AutomationCompositionElement> elementsOnThisParticipant = new LinkedHashMap<>();
         elementsOnThisParticipant.put(uuid, acElement);
         return elementsOnThisParticipant;