2 * ============LICENSE_START=======================================================
3 * Copyright (C) 2016-2018 Ericsson. All rights reserved.
4 * Modifications Copyright (C) 2019-2021 Nordix Foundation.
5 * Modifications Copyright (C) 2021 Bell Canada. All rights reserved.
6 * Modifications Copyright (C) 2021 AT&T Intellectual Property. All rights reserved.
7 * ================================================================================
8 * Licensed under the Apache License, Version 2.0 (the "License");
9 * you may not use this file except in compliance with the License.
10 * You may obtain a copy of the License at
12 * http://www.apache.org/licenses/LICENSE-2.0
14 * Unless required by applicable law or agreed to in writing, software
15 * distributed under the License is distributed on an "AS IS" BASIS,
16 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
17 * See the License for the specific language governing permissions and
18 * limitations under the License.
20 * SPDX-License-Identifier: Apache-2.0
21 * ============LICENSE_END=========================================================
24 package org.onap.policy.apex.plugins.event.protocol.jms;
26 import java.lang.reflect.Method;
27 import java.util.ArrayList;
28 import java.util.List;
30 import lombok.NoArgsConstructor;
31 import org.onap.policy.apex.service.engine.event.ApexEvent;
32 import org.onap.policy.apex.service.engine.event.ApexEventException;
33 import org.onap.policy.apex.service.engine.event.ApexEventProtocolConverter;
34 import org.onap.policy.apex.service.engine.event.ApexEventRuntimeException;
35 import org.onap.policy.apex.service.parameters.eventprotocol.EventProtocolParameters;
36 import org.slf4j.ext.XLogger;
37 import org.slf4j.ext.XLoggerFactory;
40 * The Class Apex2JMSObjectEventConverter converts {@link ApexEvent} instances into string instances of object message
43 * @author Liam Fallon (liam.fallon@ericsson.com)
47 public final class Apex2JmsObjectEventConverter implements ApexEventProtocolConverter {
48 private static final XLogger LOGGER = XLoggerFactory.getXLogger(Apex2JmsObjectEventConverter.class);
50 // JMS event protocol parameters on the consumer (JMS->Apex) sides
51 private JmsObjectEventProtocolParameters eventProtocolParameters = null;
54 public void init(final EventProtocolParameters parameters) {
55 // Check if properties have been set for JMS object event conversion as a consumer. They may not be set because
56 // JMS may not be in use
57 // on both sides of Apex
58 if (!(parameters instanceof JmsObjectEventProtocolParameters)) {
59 final String errormessage = "specified Event Protocol Parameters properties of type \""
60 + parameters.getClass().getName() + "\" are not applicable to a "
61 + Apex2JmsObjectEventConverter.class.getName() + " converter";
62 LOGGER.error(errormessage);
64 this.eventProtocolParameters = (JmsObjectEventProtocolParameters) parameters;
73 public List<ApexEvent> toApexEvent(final String eventName, final Object eventObject) throws ApexEventException {
74 // Look for a "getObject()" method on the incoming object, if there is no such method, then we cannot fetch the
76 Method getObjectMethod;
78 getObjectMethod = eventObject.getClass().getMethod("getObject", (Class<?>[]) null);
79 } catch (Exception exp) {
80 final String errorMessage = "message \"" + eventObject
81 + "\" received from JMS does not have a \"getObject()\" method";
82 throw new ApexEventRuntimeException(errorMessage, exp);
85 Object jmsIncomingObject;
87 jmsIncomingObject = getObjectMethod.invoke(eventObject, (Object[]) null);
88 } catch (final Exception exp) {
89 final String errorMessage = "object contained in message \"" + eventObject
90 + "\" received from JMS could not be retrieved as a Java object";
91 throw new ApexEventRuntimeException(errorMessage, exp);
94 // Check that the consumer parameters for JMS->Apex messaging have been set
95 if (eventProtocolParameters == null) {
96 final String errorMessage = "consumer parameters for JMS events consumed by "
97 + "Apex are not set in the Apex configuration for this engine";
98 throw new ApexEventRuntimeException(errorMessage);
101 // Create the Apex event
103 final var apexEvent = new ApexEvent(
104 jmsIncomingObject.getClass().getSimpleName() + eventProtocolParameters.getIncomingEventSuffix(),
105 eventProtocolParameters.getIncomingEventVersion(),
106 jmsIncomingObject.toString().getClass().getPackage().getName(),
107 eventProtocolParameters.getIncomingEventSource(),
108 eventProtocolParameters.getIncomingEventTarget());
111 // Set the data on the apex event as the incoming object
112 apexEvent.put(jmsIncomingObject.getClass().getSimpleName(), jmsIncomingObject);
114 // Return the event in a single element
115 final ArrayList<ApexEvent> eventList = new ArrayList<>();
116 eventList.add(apexEvent);
124 public Object fromApexEvent(final ApexEvent apexEvent) throws ApexEventException {
125 // Check the Apex event
126 if (apexEvent == null) {
127 throw new ApexEventException("event processing failed, Apex event is null");
130 // Check that the Apex event has a single parameter
131 if (apexEvent.size() != 1) {
132 final String errorMessage = "event processing failed, "
133 + "Apex event must have one and only one parameter for JMS Object handling";
134 throw new ApexEventException(errorMessage);
137 // Return the single object from the Apex event message
138 return apexEvent.values().iterator().next();