001package ca.uhn.fhir.jpa.mdm.broker;
002
003import ca.uhn.fhir.jpa.subscription.channel.api.ChannelConsumerSettings;
004import ca.uhn.fhir.jpa.subscription.channel.api.IChannelFactory;
005import ca.uhn.fhir.jpa.subscription.channel.api.IChannelReceiver;
006import ca.uhn.fhir.jpa.subscription.model.ResourceModifiedJsonMessage;
007import ca.uhn.fhir.mdm.api.IMdmSettings;
008import ca.uhn.fhir.mdm.log.Logs;
009import com.google.common.annotations.VisibleForTesting;
010import org.slf4j.Logger;
011import org.springframework.beans.factory.annotation.Autowired;
012import org.springframework.stereotype.Service;
013
014import javax.annotation.PostConstruct;
015import javax.annotation.PreDestroy;
016
017/*-
018 * #%L
019 * HAPI FHIR JPA Server - Master Data Management
020 * %%
021 * Copyright (C) 2014 - 2022 Smile CDR, Inc.
022 * %%
023 * Licensed under the Apache License, Version 2.0 (the "License");
024 * you may not use this file except in compliance with the License.
025 * You may obtain a copy of the License at
026 *
027 *      http://www.apache.org/licenses/LICENSE-2.0
028 *
029 * Unless required by applicable law or agreed to in writing, software
030 * distributed under the License is distributed on an "AS IS" BASIS,
031 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
032 * See the License for the specific language governing permissions and
033 * limitations under the License.
034 * #L%
035 */
036
037@Service
038public class MdmQueueConsumerLoader {
039        private static final Logger ourLog = Logs.getMdmTroubleshootingLog();
040
041        @Autowired
042        private MdmMessageHandler myMdmMessageHandler;
043        @Autowired
044        private IChannelFactory myChannelFactory;
045        @Autowired
046        private IMdmSettings myMdmSettings;
047
048        protected IChannelReceiver myMdmChannel;
049
050        @PostConstruct
051        public void startListeningToMdmChannel() {
052                if (myMdmChannel == null) {
053                        ChannelConsumerSettings config = new ChannelConsumerSettings();
054                        
055                        config.setConcurrentConsumers(myMdmSettings.getConcurrentConsumers());
056
057                        myMdmChannel = myChannelFactory.getOrCreateReceiver(IMdmSettings.EMPI_CHANNEL_NAME, ResourceModifiedJsonMessage.class, config);
058                        if (myMdmChannel == null) {
059                                ourLog.error("Unable to create receiver for {}", IMdmSettings.EMPI_CHANNEL_NAME);
060                        } else {
061                                myMdmChannel.subscribe(myMdmMessageHandler);
062                                ourLog.info("MDM Matching Consumer subscribed to Matching Channel {} with name {}", myMdmChannel.getClass().getName(), myMdmChannel.getName());
063                        }
064                }
065        }
066
067        @SuppressWarnings("unused")
068        @PreDestroy
069        public void stop() throws Exception {
070                if (myMdmChannel != null) {
071                        // JMS channel needs to be destroyed to avoid dangling receivers
072                        myMdmChannel.destroy();
073                        ourLog.info("MDM Matching Consumer unsubscribed from Matching Channel {} with name {}", myMdmChannel.getClass().getName(), myMdmChannel.getName());
074                }
075        }
076
077        @VisibleForTesting
078        public IChannelReceiver getMdmChannelForUnitTest() {
079                return myMdmChannel;
080        }
081}