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/*-
* ============LICENSE_START=======================================================
* Copyright (C) 2016-2018 Ericsson. All rights reserved.
* Modifications Copyright (C) 2021 Bell Canada. All rights reserved.
* Modifications Copyright (C) 2021 Nordix Foundation.
* ================================================================================
* 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.event.impl.enevent;
import java.util.ArrayList;
import java.util.List;
import org.onap.policy.apex.core.engine.engine.ApexEngine;
import org.onap.policy.apex.core.engine.event.EnEvent;
import org.onap.policy.apex.model.basicmodel.concepts.ApexException;
import org.onap.policy.apex.model.basicmodel.service.ModelService;
import org.onap.policy.apex.model.eventmodel.concepts.AxEvent;
import org.onap.policy.apex.model.eventmodel.concepts.AxEvents;
import org.onap.policy.apex.service.engine.event.ApexEvent;
import org.onap.policy.apex.service.engine.event.ApexEventConverter;
import org.onap.policy.apex.service.engine.event.ApexEventException;
import org.onap.policy.apex.service.engine.event.ApexEventRuntimeException;
/**
* The Class ApexEvent2EnEventConverter converts externally facing {@link ApexEvent} instances to
* and from instances of {@link EnEvent} that are used internally in the Apex engine core.
*
* @author Liam Fallon (liam.fallon@ericsson.com)
*/
public final class ApexEvent2EnEventConverter implements ApexEventConverter {
// The Apex engine with its event definitions
private final ApexEngine apexEngine;
/**
* Set up the event converter.
*
* @param apexEngine The engine to use to create events to be converted
*/
public ApexEvent2EnEventConverter(final ApexEngine apexEngine) {
this.apexEngine = apexEngine;
}
/**
* {@inheritDoc}.
*/
@Override
public List<ApexEvent> toApexEvent(final String eventName, final Object event) throws ApexException {
// Check the Engine event
if (event == null) {
throw new ApexEventException("event processing failed, engine event is null");
}
// Cast the event to an Engine event event, if our conversion is correctly configured, this
// cast should always work
EnEvent enEvent = null;
try {
enEvent = (EnEvent) event;
} catch (final Exception e) {
final String errorMessage = "error transferring event \"" + event + "\" to the Apex engine";
throw new ApexEventRuntimeException(errorMessage, e);
}
// Create the Apex event
final var axEvent = enEvent.getAxEvent();
final var apexEvent = new ApexEvent(axEvent.getKey().getName(), axEvent.getKey().getVersion(),
axEvent.getNameSpace(), axEvent.getSource(), axEvent.getTarget());
apexEvent.setExecutionId(enEvent.getExecutionId());
apexEvent.setExecutionProperties(enEvent.getExecutionProperties());
// Copy he exception message to the Apex event if it is set
if (enEvent.getExceptionMessage() != null) {
apexEvent.setExceptionMessage(enEvent.getExceptionMessage());
}
// Set the data on the apex event
apexEvent.putAll(enEvent);
// Return the event in a single element
final ArrayList<ApexEvent> eventList = new ArrayList<>();
eventList.add(apexEvent);
return eventList;
}
/**
* {@inheritDoc}.
*/
@Override
public EnEvent fromApexEvent(final ApexEvent apexEvent) throws ApexException {
// Check the Apex model
if (apexEngine == null) {
throw new ApexEventException("event processing failed, apex engine is null");
}
// Get the event definition
final AxEvent eventDefinition = ModelService.getModel(AxEvents.class).get(apexEvent.getName());
if (eventDefinition == null) {
throw new ApexEventException(
"event processing failed, event \"" + apexEvent.getName() + "\" not found in apex model");
}
// Create the internal engine event
final var enEvent = apexEngine.createEvent(eventDefinition.getKey());
// Set the data on the engine event
enEvent.putAll(apexEvent);
enEvent.setExecutionId(apexEvent.getExecutionId());
enEvent.setExecutionProperties(apexEvent.getExecutionProperties());
return enEvent;
}
}
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