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/* * ============LICENSE_START======================================================= * Copyright (c) 2021 Bell Canada. * ================================================================================ * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. * * SPDX-License-Identifier: Apache-2.0 * ============LICENSE_END========================================================= */ package org.onap.cps.notification; import java.time.OffsetDateTime; import java.util.Arrays; import java.util.Collections; import java.util.List; import java.util.concurrent.CompletableFuture; import java.util.concurrent.Future; import java.util.regex.Pattern; import java.util.stream.Collectors; import lombok.extern.slf4j.Slf4j; import org.springframework.scheduling.annotation.Async; import org.springframework.stereotype.Service; @Service @Slf4j public class NotificationService { private NotificationProperties notificationProperties; private NotificationPublisher notificationPublisher; private CpsDataUpdatedEventFactory cpsDataUpdatedEventFactory; private NotificationErrorHandler notificationErrorHandler; private List<Pattern> dataspacePatterns; /** * Create an instance of Notification Subscriber. * * @param notificationProperties properties for notification * @param notificationPublisher notification Publisher * @param cpsDataUpdatedEventFactory to create CPSDataUpdatedEvent * @param notificationErrorHandler error handler */ public NotificationService( final NotificationProperties notificationProperties, final NotificationPublisher notificationPublisher, final CpsDataUpdatedEventFactory cpsDataUpdatedEventFactory, final NotificationErrorHandler notificationErrorHandler) { log.info("Notification Properties {}", notificationProperties); this.notificationProperties = notificationProperties; this.notificationPublisher = notificationPublisher; this.cpsDataUpdatedEventFactory = cpsDataUpdatedEventFactory; this.notificationErrorHandler = notificationErrorHandler; this.dataspacePatterns = getDataspaceFilterPatterns(notificationProperties); } private List<Pattern> getDataspaceFilterPatterns(final NotificationProperties notificationProperties) { if (notificationProperties.isEnabled()) { return Arrays.stream(notificationProperties.getFilters() .getOrDefault("enabled-dataspaces", "") .split(",")) .map(filterPattern -> Pattern.compile(filterPattern, Pattern.CASE_INSENSITIVE)) .collect(Collectors.toList()); } else { return Collections.emptyList(); } } /** * Process Data Updated Event and publishes the notification. * * @param dataspaceName dataspace name * @param anchorName anchor name * @param observedTimestamp observedTimestamp * @return future */ @Async("notificationExecutor") public Future<Void> processDataUpdatedEvent(final String dataspaceName, final String anchorName, final OffsetDateTime observedTimestamp) { log.debug("process data updated event for dataspace '{}' & anchor '{}'", dataspaceName, anchorName); try { if (shouldSendNotification(dataspaceName)) { final var cpsDataUpdatedEvent = cpsDataUpdatedEventFactory.createCpsDataUpdatedEvent(dataspaceName, anchorName, observedTimestamp); log.debug("data updated event to be published {}", cpsDataUpdatedEvent); notificationPublisher.sendNotification(cpsDataUpdatedEvent); } } catch (final Exception exception) { /* All the exceptions are handled to not to propagate it to caller. CPS operation should not fail if sending event fails for any reason. */ notificationErrorHandler.onException("Failed to process cps-data-updated-event.", exception, dataspaceName, anchorName); } return CompletableFuture.completedFuture(null); } /* Add more complex rules based on dataspace and anchor later */ private boolean shouldSendNotification(final String dataspaceName) { return notificationProperties.isEnabled() && dataspacePatterns.stream() .anyMatch(pattern -> pattern.matcher(dataspaceName).find()); } } |
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