+/*
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2023 Nordix Foundation
+ * ================================================================================
+ * 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.ncmp.api.impl.async;
+
+import io.cloudevents.CloudEvent;
+import io.cloudevents.kafka.impl.KafkaHeaders;
+import java.io.Serializable;
+import lombok.extern.slf4j.Slf4j;
+import org.apache.kafka.common.header.Headers;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.kafka.listener.adapter.RecordFilterStrategy;
+
+/**
+ * Record filter strategies, which helps to filter the consumer records based on some conditions.
+ *
+ */
+@Configuration
+@Slf4j
+public class RecordFilterStrategies {
+
+ private static final boolean EXCLUDE_EVENT = true;
+
+ /**
+ * Include only DataOperation events based on the cloud event type header, It
+ * returns boolean, true means exclude the consumer record and false
+ * means include the consumer record.
+ * @return boolean value.
+ */
+ @Bean
+ public RecordFilterStrategy<String, CloudEvent> includeDataOperationEventsOnly() {
+ return consumerRecord ->
+ isNotCloudEventOfType(consumerRecord.headers(), "DataOperationEvent");
+ }
+
+ /**
+ * Includes the consumer records based on the cloud event type header, It returns boolean,
+ * true means exclude the consumer record and false means include the consumer record.
+ * It includes only the legacy events i.e. non-cloud events
+ * @return boolean value.
+ */
+ @Bean
+ public RecordFilterStrategy<String, Serializable> includeNonCloudEventsOnly() {
+ return consumerRecord -> isCloudEvent(consumerRecord.headers());
+ }
+
+ private boolean isCloudEvent(final Headers headers) {
+ return headers.lastHeader("ce_type") != null;
+ }
+
+ private boolean isNotCloudEventOfType(final Headers headers, final String requiredEventType) {
+ final String eventTypeHeaderValue = KafkaHeaders.getParsedKafkaHeader(headers, "ce_type");
+ if (eventTypeHeaderValue == null) {
+ log.trace("No ce_type header found, possibly a legacy event (ignored)");
+ return EXCLUDE_EVENT;
+ }
+ return !(eventTypeHeaderValue.contains(requiredEventType));
+ }
+}