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