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.plugins.event.carrier.websocket;
23 import java.util.EnumMap;
26 import org.onap.policy.apex.core.infrastructure.messaging.MessagingException;
27 import org.onap.policy.apex.core.infrastructure.messaging.stringmessaging.WsStringMessageClient;
28 import org.onap.policy.apex.core.infrastructure.messaging.stringmessaging.WsStringMessageListener;
29 import org.onap.policy.apex.core.infrastructure.messaging.stringmessaging.WsStringMessageServer;
30 import org.onap.policy.apex.core.infrastructure.messaging.stringmessaging.WsStringMessager;
31 import org.onap.policy.apex.service.engine.event.ApexEventException;
32 import org.onap.policy.apex.service.engine.event.ApexEventProducer;
33 import org.onap.policy.apex.service.engine.event.PeeredReference;
34 import org.onap.policy.apex.service.engine.event.SynchronousEventCache;
35 import org.onap.policy.apex.service.parameters.eventhandler.EventHandlerParameters;
36 import org.onap.policy.apex.service.parameters.eventhandler.EventHandlerPeeredMode;
37 import org.slf4j.Logger;
38 import org.slf4j.LoggerFactory;
41 * Concrete implementation of an Apex event producer that sends events using a web socket.
43 * @author Liam Fallon (liam.fallon@ericsson.com)
45 public class ApexWebSocketProducer implements ApexEventProducer, WsStringMessageListener {
46 // Get a reference to the logger
47 private static final Logger LOGGER = LoggerFactory.getLogger(ApexWebSocketProducer.class);
49 // The web socket messager, may be WS a server or a client
50 private WsStringMessager wsStringMessager;
52 // The name for this producer
53 private String name = null;
55 // The peer references for this event handler
56 private Map<EventHandlerPeeredMode, PeeredReference> peerReferenceMap = new EnumMap<>(EventHandlerPeeredMode.class);
59 public void init(final String producerName, final EventHandlerParameters producerParameters)
60 throws ApexEventException {
61 this.name = producerName;
63 // Check and get the web socket Properties
64 if (!(producerParameters.getCarrierTechnologyParameters() instanceof WebSocketCarrierTechnologyParameters)) {
65 String message = "specified producer properties for " + this.name
66 + "are not applicable to a web socket producer";
68 throw new ApexEventException("specified producer properties are not applicable to a web socket producer");
70 // The Web Socket properties
71 WebSocketCarrierTechnologyParameters webSocketProducerProperties =
72 (WebSocketCarrierTechnologyParameters) producerParameters.getCarrierTechnologyParameters();
74 // Check if this is a server or a client Web Socket
75 if (webSocketProducerProperties.isWsClient()) {
77 wsStringMessager = new WsStringMessageClient(webSocketProducerProperties.getHost(),
78 webSocketProducerProperties.getPort());
80 wsStringMessager = new WsStringMessageServer(webSocketProducerProperties.getPort());
83 // Start reception of event strings on the web socket
85 wsStringMessager.start(this);
86 } catch (final MessagingException e) {
87 String message = "could not start web socket producer (" + this.name + ")";
95 * @see org.onap.policy.apex.service.engine.event.ApexEventProducer#getName()
98 public String getName() {
105 * @see org.onap.policy.apex.service.engine.event.ApexEventProducer#getPeeredReference(org.onap.policy.apex.service.
106 * parameters. eventhandler.EventHandlerPeeredMode)
109 public PeeredReference getPeeredReference(final EventHandlerPeeredMode peeredMode) {
110 return peerReferenceMap.get(peeredMode);
116 * @see org.onap.policy.apex.service.engine.event.ApexEventProducer#setPeeredReference(org.onap.policy.apex.service.
117 * parameters. eventhandler.EventHandlerPeeredMode, org.onap.policy.apex.service.engine.event.PeeredReference)
120 public void setPeeredReference(final EventHandlerPeeredMode peeredMode, final PeeredReference peeredReference) {
121 peerReferenceMap.put(peeredMode, peeredReference);
127 * @see org.onap.policy.apex.apps.uservice.producer.ApexEventProducer#sendEvent(long, java.lang.String,
131 public void sendEvent(final long executionId, final String eventName, final Object event) {
132 // Check if this is a synchronized event, if so we have received a reply
133 final SynchronousEventCache synchronousEventCache = (SynchronousEventCache) peerReferenceMap
134 .get(EventHandlerPeeredMode.SYNCHRONOUS);
135 if (synchronousEventCache != null) {
136 synchronousEventCache.removeCachedEventToApexIfExists(executionId);
139 wsStringMessager.sendString((String) event);
145 * @see org.onap.policy.apex.apps.uservice.producer.ApexEventProducer#stop()
149 if (wsStringMessager != null) {
150 wsStringMessager.stop();
158 * org.onap.policy.apex.core.infrastructure.messaging.stringmessaging.WSStringMessageListener#receiveString(java.
162 public void receiveString(final String messageString) {
163 String message = "received message \"" + messageString + "\" on web socket producer (" + this.name
164 + ") , no messages should be received on a web socket producer";
165 LOGGER.warn(message);