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;
25 import java.util.Properties;
27 import org.onap.policy.apex.core.infrastructure.messaging.MessagingException;
28 import org.onap.policy.apex.core.infrastructure.messaging.stringmessaging.WsStringMessageClient;
29 import org.onap.policy.apex.core.infrastructure.messaging.stringmessaging.WsStringMessageListener;
30 import org.onap.policy.apex.core.infrastructure.messaging.stringmessaging.WsStringMessageServer;
31 import org.onap.policy.apex.core.infrastructure.messaging.stringmessaging.WsStringMessager;
32 import org.onap.policy.apex.service.engine.event.ApexEventException;
33 import org.onap.policy.apex.service.engine.event.ApexEventProducer;
34 import org.onap.policy.apex.service.engine.event.PeeredReference;
35 import org.onap.policy.apex.service.engine.event.SynchronousEventCache;
36 import org.onap.policy.apex.service.parameters.eventhandler.EventHandlerParameters;
37 import org.onap.policy.apex.service.parameters.eventhandler.EventHandlerPeeredMode;
38 import org.slf4j.Logger;
39 import org.slf4j.LoggerFactory;
42 * Concrete implementation of an Apex event producer that sends events using a web socket.
44 * @author Liam Fallon (liam.fallon@ericsson.com)
46 public class ApexWebSocketProducer implements ApexEventProducer, WsStringMessageListener {
47 // Get a reference to the logger
48 private static final Logger LOGGER = LoggerFactory.getLogger(ApexWebSocketProducer.class);
50 // The web socket messager, may be WS a server or a client
51 private WsStringMessager wsStringMessager;
53 // The name for this producer
54 private String name = null;
56 // The peer references for this event handler
57 private Map<EventHandlerPeeredMode, PeeredReference> peerReferenceMap = new EnumMap<>(EventHandlerPeeredMode.class);
60 public void init(final String producerName, final EventHandlerParameters producerParameters)
61 throws ApexEventException {
62 this.name = producerName;
64 // Check and get the web socket Properties
65 if (!(producerParameters.getCarrierTechnologyParameters() instanceof WebSocketCarrierTechnologyParameters)) {
67 "specified producer properties for " + this.name + "are not applicable to a web socket producer";
69 throw new ApexEventException("specified producer properties are not applicable to a web socket producer");
71 // The Web Socket properties
72 WebSocketCarrierTechnologyParameters webSocketProducerProperties =
73 (WebSocketCarrierTechnologyParameters) producerParameters.getCarrierTechnologyParameters();
75 // Check if this is a server or a client Web Socket
76 if (webSocketProducerProperties.isWsClient()) {
78 wsStringMessager = new WsStringMessageClient(webSocketProducerProperties.getHost(),
79 webSocketProducerProperties.getPort());
81 wsStringMessager = new WsStringMessageServer(webSocketProducerProperties.getPort());
84 // Start reception of event strings on the web socket
86 wsStringMessager.start(this);
87 } catch (final MessagingException e) {
88 String message = "could not start web socket producer (" + this.name + ")";
89 LOGGER.warn(message, e);
96 * @see org.onap.policy.apex.service.engine.event.ApexEventProducer#getName()
99 public String getName() {
106 * @see org.onap.policy.apex.service.engine.event.ApexEventProducer#getPeeredReference(org.onap.policy.apex.service.
107 * parameters. eventhandler.EventHandlerPeeredMode)
110 public PeeredReference getPeeredReference(final EventHandlerPeeredMode peeredMode) {
111 return peerReferenceMap.get(peeredMode);
117 * @see org.onap.policy.apex.service.engine.event.ApexEventProducer#setPeeredReference(org.onap.policy.apex.service.
118 * parameters. eventhandler.EventHandlerPeeredMode, org.onap.policy.apex.service.engine.event.PeeredReference)
121 public void setPeeredReference(final EventHandlerPeeredMode peeredMode, final PeeredReference peeredReference) {
122 peerReferenceMap.put(peeredMode, peeredReference);
128 * @see org.onap.policy.apex.apps.uservice.producer.ApexEventProducer#sendEvent(long, java.lang.String,
132 public void sendEvent(final long executionId, final Properties executionProperties, final String eventName,
133 final Object event) {
134 // Check if this is a synchronized event, if so we have received a reply
135 final SynchronousEventCache synchronousEventCache =
136 (SynchronousEventCache) peerReferenceMap.get(EventHandlerPeeredMode.SYNCHRONOUS);
137 if (synchronousEventCache != null) {
138 synchronousEventCache.removeCachedEventToApexIfExists(executionId);
141 wsStringMessager.sendString((String) event);
147 * @see org.onap.policy.apex.apps.uservice.producer.ApexEventProducer#stop()
151 if (wsStringMessager != null) {
152 wsStringMessager.stop();
160 * org.onap.policy.apex.core.infrastructure.messaging.stringmessaging.WSStringMessageListener#receiveString(java.
164 public void receiveString(final String messageString) {
165 String message = "received message \"" + messageString + "\" on web socket producer (" + this.name
166 + ") , no messages should be received on a web socket producer";
167 LOGGER.warn(message);