001/*-
002 * #%L
003 * HAPI FHIR Subscription Server
004 * %%
005 * Copyright (C) 2014 - 2025 Smile CDR, Inc.
006 * %%
007 * Licensed under the Apache License, Version 2.0 (the "License");
008 * you may not use this file except in compliance with the License.
009 * You may obtain a copy of the License at
010 *
011 *      http://www.apache.org/licenses/LICENSE-2.0
012 *
013 * Unless required by applicable law or agreed to in writing, software
014 * distributed under the License is distributed on an "AS IS" BASIS,
015 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
016 * See the License for the specific language governing permissions and
017 * limitations under the License.
018 * #L%
019 */
020package ca.uhn.fhir.jpa.subscription.submit.interceptor;
021
022import ca.uhn.fhir.interceptor.api.IInterceptorService;
023import ca.uhn.fhir.jpa.model.config.SubscriptionSettings;
024import ca.uhn.fhir.jpa.topic.SubscriptionTopicValidatingInterceptor;
025import com.google.common.annotations.VisibleForTesting;
026import jakarta.annotation.Nonnull;
027import jakarta.annotation.Nullable;
028import jakarta.annotation.PostConstruct;
029import org.hl7.fhir.dstu2.model.Subscription;
030import org.slf4j.Logger;
031import org.slf4j.LoggerFactory;
032
033import java.util.Set;
034
035public class SubscriptionSubmitInterceptorLoader {
036        private static final Logger ourLog = LoggerFactory.getLogger(SubscriptionSubmitInterceptorLoader.class);
037
038        @Nonnull
039        private IInterceptorService myInterceptorService;
040
041        @Nonnull
042        private final SubscriptionSettings mySubscriptionSettings;
043
044        @Nonnull
045        private final SubscriptionMatcherInterceptor mySubscriptionMatcherInterceptor;
046
047        @Nonnull
048        private final SubscriptionValidatingInterceptor mySubscriptionValidatingInterceptor;
049
050        @Nullable
051        private final SubscriptionTopicValidatingInterceptor mySubscriptionTopicValidatingInterceptor;
052
053        private boolean mySubscriptionValidatingInterceptorRegistered;
054        private boolean mySubscriptionMatcherInterceptorRegistered;
055        private boolean mySubscriptionTopicValidatingInterceptorRegistered;
056
057        public SubscriptionSubmitInterceptorLoader(
058                        @Nonnull IInterceptorService theInterceptorService,
059                        @Nonnull SubscriptionSettings theSubscriptionSettings,
060                        @Nonnull SubscriptionMatcherInterceptor theSubscriptionMatcherInterceptor,
061                        @Nonnull SubscriptionValidatingInterceptor theSubscriptionValidatingInterceptor,
062                        @Nullable SubscriptionTopicValidatingInterceptor theSubscriptionTopicValidatingInterceptor) {
063                setInterceptorService(theInterceptorService);
064                mySubscriptionSettings = theSubscriptionSettings;
065                mySubscriptionMatcherInterceptor = theSubscriptionMatcherInterceptor;
066                mySubscriptionValidatingInterceptor = theSubscriptionValidatingInterceptor;
067                mySubscriptionTopicValidatingInterceptor = theSubscriptionTopicValidatingInterceptor;
068        }
069
070        @PostConstruct
071        public void start() {
072                Set<Subscription.SubscriptionChannelType> supportedSubscriptionTypes =
073                                mySubscriptionSettings.getSupportedSubscriptionTypes();
074
075                if (supportedSubscriptionTypes.isEmpty()) {
076                        ourLog.info(
077                                        "Subscriptions are disabled on this server.  Subscriptions will not be activated and incoming resources will not be matched against subscriptions.");
078                } else {
079                        if (!mySubscriptionMatcherInterceptorRegistered) {
080                                ourLog.info("Registering subscription matcher interceptor");
081                                myInterceptorService.registerInterceptor(mySubscriptionMatcherInterceptor);
082                                mySubscriptionMatcherInterceptorRegistered = true;
083                        }
084                }
085
086                if (!mySubscriptionValidatingInterceptorRegistered) {
087                        myInterceptorService.registerInterceptor(mySubscriptionValidatingInterceptor);
088                        mySubscriptionValidatingInterceptorRegistered = true;
089                }
090
091                if (mySubscriptionTopicValidatingInterceptor != null && !mySubscriptionTopicValidatingInterceptorRegistered) {
092                        myInterceptorService.registerInterceptor(mySubscriptionTopicValidatingInterceptor);
093                        mySubscriptionTopicValidatingInterceptorRegistered = true;
094                }
095        }
096
097        protected void setInterceptorService(IInterceptorService theInterceptorService) {
098                myInterceptorService = theInterceptorService;
099        }
100
101        protected IInterceptorService getInterceptorService() {
102                return myInterceptorService;
103        }
104
105        @VisibleForTesting
106        public void unregisterInterceptorsForUnitTest() {
107                myInterceptorService.unregisterInterceptor(mySubscriptionMatcherInterceptor);
108                myInterceptorService.unregisterInterceptor(mySubscriptionValidatingInterceptor);
109                mySubscriptionValidatingInterceptorRegistered = false;
110                mySubscriptionMatcherInterceptorRegistered = false;
111        }
112}