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/*-
* ============LICENSE_START=======================================================
* ONAP PAP
* ================================================================================
* Copyright (C) 2019 AT&T Intellectual Property. All rights reserved.
* Modifications Copyright (C) 2021 Nordix Foundation.
* Modifications Copyright (C) 2021 Bell Canada. 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.pap.main.comm;
import java.util.LinkedList;
import java.util.List;
import org.onap.policy.common.parameters.ParameterService;
import org.onap.policy.common.utils.services.Registry;
import org.onap.policy.models.base.PfModelException;
import org.onap.policy.models.pap.concepts.PolicyNotification;
import org.onap.policy.models.pdp.concepts.PdpStateChange;
import org.onap.policy.models.pdp.concepts.PdpSubGroup;
import org.onap.policy.models.pdp.concepts.PdpUpdate;
import org.onap.policy.models.pdp.enums.PdpState;
import org.onap.policy.models.provider.PolicyModelsProvider;
import org.onap.policy.models.tosca.authorative.concepts.ToscaConceptIdentifier;
import org.onap.policy.models.tosca.authorative.concepts.ToscaPolicy;
import org.onap.policy.pap.main.PapConstants;
import org.onap.policy.pap.main.PolicyModelsProviderFactoryWrapper;
import org.onap.policy.pap.main.notification.DeploymentStatus;
import org.onap.policy.pap.main.notification.PolicyNotifier;
import org.onap.policy.pap.main.parameters.PapParameterGroup;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* PDP message generator used to generate PDP-UPDATE and PDP-STATE-CHANGE messages.
*/
public class PdpMessageGenerator {
private static final Logger LOGGER = LoggerFactory.getLogger(PdpMessageGenerator.class);
private static final String PAP_GROUP_PARAMS_NAME = "PapGroup";
/**
* Lock used when updating PDPs.
*/
protected final Object updateLock;
/**
* Used to send UPDATE and STATE-CHANGE requests to the PDPs.
*/
protected final PdpModifyRequestMap requestMap;
/**
* Factory for PAP DAO.
*/
protected final PolicyModelsProviderFactoryWrapper modelProviderWrapper;
/**
* Heart beat interval, in milliseconds, to pass to PDPs, or {@code null}.
*/
private final Long heartBeatMs;
/**
* Constructs the object.
*
* @param includeHeartBeat if the heart beat interval is to be included in any
* PDP-UPDATE messages
*/
public PdpMessageGenerator(boolean includeHeartBeat) {
modelProviderWrapper = Registry.get(PapConstants.REG_PAP_DAO_FACTORY, PolicyModelsProviderFactoryWrapper.class);
updateLock = Registry.get(PapConstants.REG_PDP_MODIFY_LOCK, Object.class);
requestMap = Registry.get(PapConstants.REG_PDP_MODIFY_MAP, PdpModifyRequestMap.class);
if (includeHeartBeat) {
PapParameterGroup params = ParameterService.get(PAP_GROUP_PARAMS_NAME);
heartBeatMs = params.getPdpParameters().getHeartBeatMs();
} else {
heartBeatMs = null;
}
}
protected PdpUpdate createPdpUpdateMessage(final String pdpGroupName, final PdpSubGroup subGroup,
final String pdpInstanceId, final PolicyModelsProvider databaseProvider)
throws PfModelException {
final PdpUpdate update = new PdpUpdate();
update.setName(pdpInstanceId);
update.setPdpGroup(pdpGroupName);
update.setPdpSubgroup(subGroup.getPdpType());
update.setPolicies(getToscaPolicies(subGroup, databaseProvider));
update.setPdpHeartbeatIntervalMs(heartBeatMs);
LOGGER.debug("Created PdpUpdate message - {}", update);
return update;
}
private List<ToscaPolicy> getToscaPolicies(final PdpSubGroup subGroup, final PolicyModelsProvider databaseProvider)
throws PfModelException {
final List<ToscaPolicy> policies = new LinkedList<>();
for (final ToscaConceptIdentifier policyIdentifier : subGroup.getPolicies()) {
policies.addAll(databaseProvider.getPolicyList(policyIdentifier.getName(), policyIdentifier.getVersion()));
}
LOGGER.debug("Created ToscaPolicy list - {}", policies);
return policies;
}
protected PdpStateChange createPdpStateChangeMessage(final String pdpGroupName, final PdpSubGroup subGroup,
final String pdpInstanceId, final PdpState pdpState) {
final PdpStateChange stateChange = new PdpStateChange();
stateChange.setName(pdpInstanceId);
stateChange.setPdpGroup(pdpGroupName);
stateChange.setPdpSubgroup(subGroup.getPdpType());
stateChange.setState(pdpState == null ? PdpState.ACTIVE : pdpState);
LOGGER.debug("Created PdpStateChange message - {}", stateChange);
return stateChange;
}
/**
* If group state=ACTIVE AND updateMsg has policiesToDeploy, then make sure deployment status is updated
* If group state=PASSIVE, then delete any deployment information for a PDP.
*
* @param pdpGroupName the group name
* @param pdpType the pdp type
* @param pdpInstanceId the pdp instance
* @param pdpState the new state as per the PDP_STATE_CHANGE change message
* @param databaseProvider the database provider
* @param policies list of policies as per the PDP_UPDATE message
* @throws PfModelException the exception
*/
protected void updateDeploymentStatus(final String pdpGroupName, final String pdpType, final String pdpInstanceId,
PdpState pdpState, final PolicyModelsProvider databaseProvider, List<ToscaPolicy> policies)
throws PfModelException {
DeploymentStatus deploymentStatus = new DeploymentStatus(databaseProvider);
deploymentStatus.loadByGroup(pdpGroupName);
if (pdpState.equals(PdpState.PASSIVE)) {
deploymentStatus.deleteDeployment(pdpInstanceId);
} else if (pdpState.equals(PdpState.ACTIVE)) {
for (ToscaPolicy toscaPolicy : policies) {
deploymentStatus.deploy(pdpInstanceId, toscaPolicy.getIdentifier(), toscaPolicy.getTypeIdentifier(),
pdpGroupName, pdpType, true);
}
}
PolicyNotification notification = new PolicyNotification();
deploymentStatus.flush(notification);
PolicyNotifier notifier = Registry.get(PapConstants.REG_POLICY_NOTIFIER);
notifier.publish(notification);
}
}
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