1 files changed, 159 insertions, 0 deletions
diff --git a/participant/participant-impl/participant-impl-policy/src/main/java/org/onap/policy/clamp/controlloop/participant/policy/main/handler/ControlLoopElementHandler.java b/participant/participant-impl/participant-impl-policy/src/main/java/org/onap/policy/clamp/controlloop/participant/policy/main/handler/ControlLoopElementHandler.java
new file mode 100644
index 000000000..932ebbece
--- /dev/null
+++ b/participant/participant-impl/participant-impl-policy/src/main/java/org/onap/policy/clamp/controlloop/participant/policy/main/handler/ControlLoopElementHandler.java
@@ -0,0 +1,159 @@
+/*-
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 2021 Nordix Foundation.
+ * ================================================================================
+ * 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.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.clamp.controlloop.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 org.onap.policy.clamp.controlloop.models.controlloop.concepts.ClElementStatistics;
+import org.onap.policy.clamp.controlloop.models.controlloop.concepts.ControlLoopElement;
+import org.onap.policy.clamp.controlloop.models.controlloop.concepts.ControlLoopOrderedState;
+import org.onap.policy.clamp.controlloop.models.controlloop.concepts.ControlLoopState;
+import org.onap.policy.clamp.controlloop.participant.intermediary.api.ControlLoopElementListener;
+import org.onap.policy.models.base.PfModelException;
+import org.onap.policy.models.base.PfModelRuntimeException;
+import org.onap.policy.models.provider.PolicyModelsProvider;
+import org.onap.policy.models.tosca.authorative.concepts.ToscaPolicy;
+import org.onap.policy.models.tosca.authorative.concepts.ToscaPolicyType;
+import org.onap.policy.models.tosca.authorative.concepts.ToscaServiceTemplate;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * This class handles implementation of controlLoopElement updates.
+ */
+public class ControlLoopElementHandler implements ControlLoopElementListener {
+
+    private static final Logger LOGGER = LoggerFactory.getLogger(ControlLoopElementHandler.class);
+    private static final Map<String, String> policyTypeMap = new LinkedHashMap<>();
+    private static final Map<String, String> policyMap = new LinkedHashMap<>();
+
+    /**
+     * Callback method to handle a control loop element state change.
+     *
+     * @param controlLoopElementId the ID of the control loop element
+     * @param currentState the current state of the control loop element
+     * @param newState the state to which the control loop element is changing to
+     * @throws PfModelException in case of an exception
+    */
+    @Override
+    public void controlLoopElementStateChange(UUID controlLoopElementId,
+            ControlLoopState currentState,
+            ControlLoopOrderedState newState) throws PfModelException {
+        PolicyProvider policyProvider = PolicyHandler.getInstance().getPolicyProvider();
+        switch (newState) {
+            case UNINITIALISED:
+                try {
+                    deletePolicyData(controlLoopElementId, newState);
+                } catch (PfModelRuntimeException e) {
+                    LOGGER.debug("Delete policytpes failed", e);
+                }
+                break;
+            case PASSIVE:
+                policyProvider.getIntermediaryApi()
+                    .updateControlLoopElementState(controlLoopElementId, newState,
+                            ControlLoopState.PASSIVE);
+                break;
+            case RUNNING:
+                policyProvider.getIntermediaryApi()
+                    .updateControlLoopElementState(controlLoopElementId, newState,
+                            ControlLoopState.RUNNING);
+                break;
+            default:
+                LOGGER.debug("Unknown orderedstate {}", newState);
+                break;
+        }
+    }
+
+    private void deletePolicyData(UUID controlLoopElementId,
+            ControlLoopOrderedState newState) throws PfModelException {
+        PolicyModelsProvider dbProvider = PolicyHandler.getInstance().getDatabaseProvider();
+        PolicyProvider policyProvider = PolicyHandler.getInstance().getPolicyProvider();
+        if (policyMap != null) {
+            // Delete all policies of this controlLoop from policy framework
+            for (Entry<String, String> policy : policyMap.entrySet()) {
+                dbProvider.deletePolicy(policy.getKey(), policy.getValue());
+            }
+        }
+        if (policyTypeMap != null) {
+            // Delete all policy types of this control loop from policy framework
+            for (Entry<String, String> policy : policyTypeMap.entrySet()) {
+                dbProvider.deletePolicyType(policy.getKey(), policy.getValue());
+            }
+        }
+        policyProvider.getIntermediaryApi()
+            .updateControlLoopElementState(controlLoopElementId, newState,
+                    ControlLoopState.UNINITIALISED);
+    }
+
+    /**
+     * Callback method to handle an update on a control loop element.
+     *
+     * @param element the information on the control loop element
+     * @param controlLoopDefinition toscaServiceTemplate
+     * @throws PfModelException in case of an exception
+     */
+    @Override
+    public void controlLoopElementUpdate(ControlLoopElement element,
+            ToscaServiceTemplate controlLoopDefinition) throws PfModelException {
+        PolicyModelsProvider dbProvider = PolicyHandler.getInstance().getDatabaseProvider();
+        PolicyProvider policyProvider = PolicyHandler.getInstance().getPolicyProvider();
+
+        policyProvider.getIntermediaryApi()
+            .updateControlLoopElementState(element.getId(), element.getOrderedState(), ControlLoopState.PASSIVE);
+        if (controlLoopDefinition.getPolicyTypes() != null) {
+            for (ToscaPolicyType policyType : controlLoopDefinition.getPolicyTypes().values()) {
+                policyTypeMap.put(policyType.getName(), policyType.getVersion());
+            }
+            dbProvider.createPolicyTypes(controlLoopDefinition);
+        }
+        if (controlLoopDefinition.getToscaTopologyTemplate().getPolicies() != null) {
+            for (Map<String, ToscaPolicy> foundPolicyMap : controlLoopDefinition
+                            .getToscaTopologyTemplate().getPolicies()) {
+                for (ToscaPolicy policy : foundPolicyMap.values()) {
+                    policyMap.put(policy.getName(), policy.getVersion());
+                }
+            }
+            dbProvider.createPolicies(controlLoopDefinition);
+        }
+    }
+
+    /**
+     * Handle controlLoopElement statistics.
+     *
+     * @param controlLoopElementId controlloop element id
+     */
+    @Override
+    public void handleStatistics(UUID controlLoopElementId) {
+        PolicyProvider policyProvider = PolicyHandler.getInstance().getPolicyProvider();
+        ControlLoopElement clElement = policyProvider.getIntermediaryApi()
+               .getControlLoopElement(controlLoopElementId);
+        if (clElement != null) {
+            ClElementStatistics clElementStatistics = new ClElementStatistics();
+            clElementStatistics.setControlLoopState(clElement.getState());
+            clElementStatistics.setTimeStamp(Instant.now());
+            policyProvider.getIntermediaryApi()
+                .updateControlLoopElementStatistics(controlLoopElementId, clElementStatistics);
+        }
+    }
+}