2 * ============LICENSE_START=======================================================
3 * Copyright (C) 2016-2018 Ericsson. All rights reserved.
4 * Modifications Copyright (C) 2019 Nordix Foundation.
5 * ================================================================================
6 * Licensed under the Apache License, Version 2.0 (the "License");
7 * you may not use this file except in compliance with the License.
8 * You may obtain a copy of the License at
10 * http://www.apache.org/licenses/LICENSE-2.0
12 * Unless required by applicable law or agreed to in writing, software
13 * distributed under the License is distributed on an "AS IS" BASIS,
14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 * See the License for the specific language governing permissions and
16 * limitations under the License.
18 * SPDX-License-Identifier: Apache-2.0
19 * ============LICENSE_END=========================================================
22 package org.onap.policy.apex.service.engine.event.impl;
24 import org.onap.policy.apex.service.engine.event.ApexEventException;
25 import org.onap.policy.apex.service.engine.event.ApexEventProducer;
26 import org.onap.policy.apex.service.parameters.carriertechnology.CarrierTechnologyParameters;
27 import org.onap.policy.apex.service.parameters.eventhandler.EventHandlerParameters;
28 import org.slf4j.ext.XLogger;
29 import org.slf4j.ext.XLoggerFactory;
32 * This factory class creates event producers for the defined technology type for Apex engines.
34 * @author Liam Fallon (liam.fallon@ericsson.com)
36 public class EventProducerFactory {
37 // The logger for this class
38 private static final XLogger LOGGER = XLoggerFactory.getXLogger(EventProducerFactory.class);
41 * Create an event producer of the required type for the specified producer technology.
43 * @param name the name of the producer
44 * @param producerParameters The Apex parameters containing the configuration for the producer
45 * @return the event producer
46 * @throws ApexEventException on errors creating the Apex event producer
48 public ApexEventProducer createProducer(final String name, final EventHandlerParameters producerParameters)
49 throws ApexEventException {
50 // Get the carrier technology parameters
51 final CarrierTechnologyParameters technologyParameters = producerParameters.getCarrierTechnologyParameters();
53 // Get the class for the event producer using reflection
54 final String producerPluginClass = technologyParameters.getEventProducerPluginClass();
55 Object producerPluginObject = null;
57 producerPluginObject = Class.forName(producerPluginClass).newInstance();
58 } catch (InstantiationException | IllegalAccessException | ClassNotFoundException e) {
59 final String errorMessage = "could not create an Apex event producer for Producer \"" + name
60 + "\" for the carrier technology \"" + technologyParameters.getLabel()
61 + "\", specified event producer plugin class \"" + producerPluginClass + "\" not found";
62 LOGGER.error(errorMessage, e);
63 throw new ApexEventException(errorMessage, e);
66 // Check the class is an event producer
67 if (!(producerPluginObject instanceof ApexEventProducer)) {
68 final String errorMessage = "could not create an Apex event producer for Producer \"" + name
69 + "\" for the carrier technology \"" + technologyParameters.getLabel()
70 + "\", specified event producer plugin class \"" + producerPluginClass
71 + "\" is not an instance of \"" + ApexEventProducer.class.getName() + "\"";
72 LOGGER.error(errorMessage);
73 throw new ApexEventException(errorMessage);
76 return (ApexEventProducer) producerPluginObject;