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/*-
* ============LICENSE_START=======================================================
* Copyright (C) 2016-2018 Ericsson. All rights reserved.
* Modifications Copyright (C) 2021 Bell Canada. 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.plugins.event.protocol.jms;
import java.lang.reflect.Method;
import java.util.List;
import org.onap.policy.apex.service.engine.event.ApexEvent;
import org.onap.policy.apex.service.engine.event.ApexEventException;
import org.onap.policy.apex.service.engine.event.ApexEventRuntimeException;
import org.onap.policy.apex.service.engine.event.impl.jsonprotocolplugin.Apex2JsonEventConverter;
/**
* The Class Apex2JMSTextEventConverter converts {@link ApexEvent} instances into string instances of
* text message events for JMS. It is a proxy for the built in
* {@link org.onap.policy.apex.service.engine.event.impl.jsonprotocolplugin.Apex2JsonEventConverter} plugin.
*
* @author Liam Fallon (liam.fallon@ericsson.com)
*/
public final class Apex2JmsTextEventConverter extends Apex2JsonEventConverter {
/**
* {@inheritDoc}.
*/
@Override
public List<ApexEvent> toApexEvent(final String eventName, final Object eventObject) throws ApexEventException {
// Look for a "getText()" method on the incoming object, if there is no such method, then we cannot fetch the
// text from JMS
Method getTextMethod;
try {
getTextMethod = eventObject.getClass().getMethod("getText", (Class<?>[]) null);
} catch (Exception exp) {
final String errorMessage = "message \"" + eventObject
+ "\" received from JMS does not have a \"getText()\" method";
throw new ApexEventRuntimeException(errorMessage, exp);
}
String jmsString;
try {
jmsString = (String) getTextMethod.invoke(eventObject, (Object[]) null);
} catch (final Exception exp) {
final String errorMessage = "object contained in message \"" + eventObject
+ "\" received from JMS could not be retrieved as a Java String";
throw new ApexEventRuntimeException(errorMessage, exp);
}
// Use the generic JSON plugin from here
return super.toApexEvent(eventName, jmsString);
}
/**
* {@inheritDoc}.
*/
@Override
public Object fromApexEvent(final ApexEvent apexEvent) throws ApexEventException {
// Check the Apex event
if (apexEvent == null) {
throw new ApexEventException("event processing failed, Apex event is null");
}
// Return the Apex event as a string object
return super.fromApexEvent(apexEvent);
}
}
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