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/*-
* ============LICENSE_START=======================================================
* ONAP
* ================================================================================
* Copyright (C) 2017-2020 AT&T Intellectual Property. 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.controlloop.processor;
import java.io.Serializable;
import lombok.Getter;
import org.onap.policy.common.utils.coder.CoderException;
import org.onap.policy.common.utils.coder.StandardYamlCoder;
import org.onap.policy.controlloop.ControlLoopException;
import org.onap.policy.controlloop.actorserviceprovider.OperationFinalResult;
import org.onap.policy.controlloop.actorserviceprovider.OperationResult;
import org.onap.policy.controlloop.drl.legacy.ControlLoopParams;
import org.onap.policy.drools.domain.models.operational.Operation;
import org.onap.policy.drools.domain.models.operational.OperationalPolicy;
import org.onap.policy.drools.system.PolicyEngineConstants;
import org.onap.policy.models.tosca.authorative.concepts.ToscaPolicy;
import org.onap.policy.models.tosca.authorative.concepts.ToscaServiceTemplate;
public class ControlLoopProcessor implements Serializable {
private static final long serialVersionUID = 1L;
private static final StandardYamlCoder coder = new StandardYamlCoder();
@Getter
private final OperationalPolicy policy;
private String currentNestedPolicyId;
// not serializable, thus must be transient
@Getter
private transient ToscaPolicy toscaOpPolicy;
//@Getter
//private ControlLoop controlLoop;
/**
* Construct an instance from yaml.
*
* @param yaml the yaml
* @throws ControlLoopException if an error occurs
*/
public ControlLoopProcessor(String yaml) throws ControlLoopException {
this(decodeTosca(yaml));
}
/**
* Create an instance from a Tosca Policy.
*/
public ControlLoopProcessor(ToscaPolicy toscaPolicy) throws ControlLoopException {
try {
this.policy =
PolicyEngineConstants.getManager().getDomainMaker().convertTo(toscaPolicy, OperationalPolicy.class);
this.currentNestedPolicyId = this.policy.getProperties().getTrigger();
this.toscaOpPolicy = toscaPolicy;
} catch (RuntimeException | CoderException e) {
throw new ControlLoopException(e);
}
}
private static ToscaPolicy decodeTosca(String yaml) throws ControlLoopException {
try {
ToscaServiceTemplate template = coder.decode(yaml, ToscaServiceTemplate.class);
if (template == null || template.getToscaTopologyTemplate() == null) {
throw new IllegalArgumentException("Cannot decode yaml into ToscaServiceTemplate");
}
return template.getToscaTopologyTemplate().getPolicies().get(0).values().iterator().next();
} catch (final Exception e) {
//
// Most likely this is a YAML Exception
//
throw new ControlLoopException(e);
}
}
/**
* Get ControlLoopParams.
*/
public ControlLoopParams getControlLoopParams() {
ControlLoopParams controlLoopParams = new ControlLoopParams();
controlLoopParams.setClosedLoopControlName(this.policy.getProperties().getId());
controlLoopParams.setPolicyScope(policy.getType() + ":" + policy.getTypeVersion());
controlLoopParams.setPolicyName(policy.getName());
controlLoopParams.setPolicyVersion(policy.getVersion());
controlLoopParams.setToscaPolicy(toscaOpPolicy);
return controlLoopParams;
}
public OperationFinalResult checkIsCurrentPolicyFinal() {
return OperationFinalResult.toResult(this.currentNestedPolicyId);
}
/**
* Get the current policy.
*
* @return the current policy
* @throws ControlLoopException if an error occurs
*/
public Operation getCurrentPolicy() throws ControlLoopException {
if (this.policy == null || this.policy.getProperties() == null
|| this.policy.getProperties().getOperations() == null
|| this.policy.getProperties().getOperations().isEmpty()) {
throw new ControlLoopException("There are no policies defined.");
}
for (final Operation nestedPolicy : this.policy.getProperties().getOperations()) {
if (nestedPolicy.getId().equals(this.currentNestedPolicyId)) {
return nestedPolicy;
}
}
return null;
}
/**
* Get the next policy given a result of the current policy.
*
* @param result the result of the current policy
* @throws ControlLoopException if an error occurs
*/
public void nextPolicyForResult(OperationResult result) throws ControlLoopException {
final Operation currentPolicy = this.getCurrentPolicy();
try {
if (currentPolicy == null) {
throw new ControlLoopException("There is no current policy to determine where to go to.");
}
switch (result) {
case SUCCESS:
this.currentNestedPolicyId = currentPolicy.getSuccess();
break;
case FAILURE:
this.currentNestedPolicyId = currentPolicy.getFailure();
break;
case FAILURE_TIMEOUT:
this.currentNestedPolicyId = currentPolicy.getFailureTimeout();
break;
case FAILURE_RETRIES:
this.currentNestedPolicyId = currentPolicy.getFailureRetries();
break;
case FAILURE_EXCEPTION:
this.currentNestedPolicyId = currentPolicy.getFailureException();
break;
case FAILURE_GUARD:
default:
this.currentNestedPolicyId = currentPolicy.getFailureGuard();
break;
}
} catch (final ControlLoopException e) {
this.currentNestedPolicyId = OperationFinalResult.FINAL_FAILURE_EXCEPTION.toString();
throw e;
}
}
}
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