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/*
* ============LICENSE_START=======================================================
* ONAP
* ================================================================================
* Copyright (C) 2019 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.drools.lifecycle;
import java.util.List;
import java.util.function.BiFunction;
import lombok.NonNull;
import org.onap.policy.drools.system.PolicyController;
import org.onap.policy.models.pdp.concepts.PdpResponseDetails;
import org.onap.policy.models.pdp.concepts.PdpStateChange;
import org.onap.policy.models.pdp.concepts.PdpUpdate;
import org.onap.policy.models.pdp.enums.PdpResponseStatus;
import org.onap.policy.models.pdp.enums.PdpState;
import org.onap.policy.models.tosca.authorative.concepts.ToscaPolicy;
import org.onap.policy.models.tosca.authorative.concepts.ToscaPolicyTypeIdentifier;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Support class for default functionality for running states.
*/
public abstract class LifecycleStateRunning extends LifecycleStateDefault {
private static final Logger logger = LoggerFactory.getLogger(LifecycleState.class);
protected abstract boolean stateChangeToPassive(@NonNull PdpStateChange change);
protected abstract boolean stateChangeToActive(@NonNull PdpStateChange change);
protected abstract boolean deployPolicy(@NonNull PolicyController controller, @NonNull ToscaPolicy policy);
protected abstract boolean undeployPolicy(@NonNull PolicyController controller, @NonNull ToscaPolicy policy);
protected LifecycleStateRunning(LifecycleFsm manager) {
super(manager);
}
@Override
public boolean start() {
logger.warn("{}: start", this);
return false;
}
@Override
public boolean stop() {
synchronized (fsm) {
boolean success = fsm.statusAction(PdpState.TERMINATED, null);
success = fsm.stopAction() && success;
return transitionToState(new LifecycleStateTerminated(fsm)) && success;
}
}
@Override
public void shutdown() {
synchronized (fsm) {
stop();
fsm.shutdownAction();
}
}
@Override
public boolean status() {
synchronized (fsm) {
return fsm.statusAction();
}
}
@Override
public boolean isAlive() {
return true;
}
@Override
public boolean stateChange(@NonNull PdpStateChange change) {
synchronized (fsm) {
if (change.getState() == PdpState.PASSIVE) {
group(change.getPdpGroup(), change.getPdpSubgroup());
return stateChangeToPassive(change);
}
if (change.getState() == PdpState.ACTIVE) {
group(change.getPdpGroup(), change.getPdpSubgroup());
return stateChangeToActive(change);
}
logger.warn("{}: state-change: {}", this, change);
invalidStateChange(change);
return false;
}
}
@Override
public boolean update(@NonNull PdpUpdate update) {
synchronized (fsm) {
if (update.getPdpHeartbeatIntervalMs() != null
&& !fsm.setStatusIntervalAction(update.getPdpHeartbeatIntervalMs() / 1000)) {
fsm.statusAction(response(update.getRequestId(), PdpResponseStatus.FAIL,
"invalid interval: " + update.getPdpHeartbeatIntervalMs() + " seconds"));
return false;
}
group(update.getPdpGroup(), update.getPdpSubgroup());
if (!updatePolicies(update.getPolicies())) {
fsm.statusAction(response(update.getRequestId(), PdpResponseStatus.FAIL, "cannot process policies"));
return false;
}
return fsm.statusAction(response(update.getRequestId(), PdpResponseStatus.SUCCESS, null));
}
}
protected boolean updatePolicies(List<ToscaPolicy> policies) {
if (policies == null) {
return true;
}
boolean success = deployPolicies(policies);
return undeployPolicies(policies) && success;
}
protected boolean deployPolicies(List<ToscaPolicy> policies) {
return syncPolicies(fsm.getDeployablePoliciesAction(policies), this::deployPolicy);
}
protected boolean undeployPolicies(List<ToscaPolicy> policies) {
return syncPolicies(fsm.getUndeployablePoliciesAction(policies), this::undeployPolicy);
}
protected boolean syncPolicies(List<ToscaPolicy> policies,
BiFunction<PolicyController, ToscaPolicy, Boolean> sync) {
boolean success = true;
for (ToscaPolicy policy : policies) {
ToscaPolicyTypeIdentifier policyType = policy.getTypeIdentifier();
PolicyController controller = fsm.getController(policyType);
if (controller == null) {
logger.warn("no controller found for {}", policyType);
success = false;
continue;
}
success = sync.apply(controller, policy) && success;
}
return success;
}
private void invalidStateChange(PdpStateChange change) {
logger.warn("{}: state-change: {}", this, change);
fsm.statusAction(response(change.getRequestId(), PdpResponseStatus.FAIL,
"invalid state change to " + change.getState()));
}
protected PdpResponseDetails response(String requestId, PdpResponseStatus responseStatus, String message) {
PdpResponseDetails response = new PdpResponseDetails();
response.setResponseTo(requestId);
response.setResponseStatus(responseStatus);
if (message != null) {
response.setResponseMessage(message);
}
return response;
}
protected void group(String group, String subgroup) {
if (group == null || subgroup == null) {
return;
}
fsm.setGroupAction(group, subgroup);
}
}
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