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/*-
* ============LICENSE_START=======================================================
* Copyright (C) 2016-2018 Ericsson. 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.
*
* SPDX-License-Identifier: Apache-2.0
* ============LICENSE_END=========================================================
*/
package org.onap.policy.apex.service.engine.main;
import org.onap.policy.apex.model.basicmodel.concepts.ApexException;
import org.onap.policy.apex.service.engine.engdep.EngDepMessagingService;
import org.onap.policy.apex.service.engine.event.ApexEvent;
import org.onap.policy.apex.service.engine.runtime.EngineService;
import org.slf4j.ext.XLogger;
import org.slf4j.ext.XLoggerFactory;
/**
* The Class ApexEngineServiceHandler holds the reference to the Apex engine service and the EngDep
* service for that engine. It also acts as an event receiver for asynchronous and synchronous
* events.
*/
public class ApexEngineServiceHandler {
// The logger for this class
private static final XLogger LOGGER = XLoggerFactory.getXLogger(ApexEngineServiceHandler.class);
// The Apex engine service, the Apex engine itself
private final EngineService apexEngineService;
// The interface between the Apex engine and Apex policy deployment for the Apex engine
private final EngDepMessagingService engDepService;
/**
* Instantiates a new engine holder with its engine service and EngDep service.
*
* @param apexEngineService the apex engine service
* @param engDepService the EngDep service
*/
ApexEngineServiceHandler(final EngineService apexEngineService, final EngDepMessagingService engDepService) {
this.apexEngineService = apexEngineService;
this.engDepService = engDepService;
}
/**
* This method forwards an event to the Apex service.
*
* @param apexEvent The event to forward to Apex
*/
public void forwardEvent(final ApexEvent apexEvent) {
try {
// Send the event to the engine runtime
apexEngineService.getEngineServiceEventInterface().sendEvent(apexEvent);
} catch (final Exception e) {
final String errorMessage = "error transferring event \"" + apexEvent.getName() + "\" to the Apex engine";
LOGGER.debug(errorMessage, e);
throw new ApexActivatorRuntimeException(errorMessage, e);
}
}
/**
* Terminate the Apex engine.
*
* @throws ApexException on termination errors
*/
public void terminate() throws ApexException {
// Shut down engine management
if (engDepService != null) {
engDepService.stop();
}
// Shut down each engine instance
if (apexEngineService != null) {
apexEngineService.stop();
apexEngineService.clear();
}
}
}
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