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/*-
* ============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);
}
}
}
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