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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.controlloop.eventmanager;
import lombok.Getter;
import org.drools.core.WorkingMemory;
import org.kie.api.runtime.rule.FactHandle;
import org.onap.policy.drools.core.lock.Lock;
import org.onap.policy.drools.core.lock.LockCallback;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Lock call-back that updates working memory.
*/
@Getter
public class LockCallbackWorkingMemory implements LockCallback {
private static final Logger logger = LoggerFactory.getLogger(LockCallbackWorkingMemory.class);
/**
* Name to be logged when the lock is updated.
*/
private final String name;
/**
* Working memory to be updated when the lock is notified.
*/
private final WorkingMemory workingMemory;
/**
* Constructs the object.
*
* @param name name to be logged when the lock is updated
* @param workingMemory working memory to be updated when the lock is notified
*/
public LockCallbackWorkingMemory(String name, WorkingMemory workingMemory) {
this.name = name;
this.workingMemory = workingMemory;
}
@Override
public void lockAvailable(Lock lock) {
notifySession(lock);
}
@Override
public void lockUnavailable(Lock lock) {
notifySession(lock);
}
/**
* Notifies the session that the lock has been updated.
*/
private void notifySession(Lock lock) {
FactHandle fact = workingMemory.getFactHandle(lock);
if (fact != null) {
logger.debug("{}: updating lock={}", name, lock);
workingMemory.update(fact, lock);
}
}
}
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