NCMP : forward bulk response messages to client topic

Issue-ID: CPS-1557
Signed-off-by: raviteja.karumuri <raviteja.karumuri@est.tech>
Change-Id: I0ea040e98987f992f46105afea0a171c4031d64f

2 files changed, 114 insertions, 0 deletions

diff --git a/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/api/impl/async/BatchRecordFilterStrategy.java b/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/api/impl/async/BatchRecordFilterStrategy.java
new file mode 100644
index 000000000..088e96564
--- /dev/null
+++ b/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/api/impl/async/BatchRecordFilterStrategy.java
@@ -0,0 +1,50 @@
+/*
+ * ============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 org.apache.commons.lang3.SerializationUtils;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.kafka.listener.adapter.RecordFilterStrategy;
+
+/**
+ * Batch Record filter strategy, which helps to filter the consumer records.
+ *
+ */
+@Configuration
+public class BatchRecordFilterStrategy {
+
+    /**
+     *  Filtering the consumer records based on the eventType header, It
+     *  returns boolean, true means filter the consumer record and false
+     *  means not filter the consumer record.
+     * @return boolean value.
+     */
+    @Bean
+    public RecordFilterStrategy<Object, Object> filterBatchDataResponseEvent() {
+        return consumedRecord -> {
+            final String headerValue = SerializationUtils
+                    .deserialize(consumedRecord.headers().lastHeader("eventType").value());
+            return !(headerValue != null
+                    && headerValue.startsWith("org.onap.cps.ncmp.events.async.BatchDataResponseEvent"));
+        };
+    }
+}
diff --git a/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/api/impl/async/NcmpAsyncBatchEventConsumer.java b/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/api/impl/async/NcmpAsyncBatchEventConsumer.java
new file mode 100644
index 000000000..2a332d003
--- /dev/null
+++ b/cps-ncmp-service/src/main/java/org/onap/cps/ncmp/api/impl/async/NcmpAsyncBatchEventConsumer.java
@@ -0,0 +1,64 @@
+/*
+ * ============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 lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.apache.commons.lang3.SerializationUtils;
+import org.apache.kafka.clients.consumer.ConsumerRecord;
+import org.onap.cps.ncmp.api.impl.events.EventsPublisher;
+import org.onap.cps.ncmp.events.async.BatchDataResponseEventV1;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
+import org.springframework.kafka.annotation.KafkaListener;
+import org.springframework.stereotype.Component;
+
+/**
+ * Listener for cps-ncmp async batch events.
+ */
+@Component
+@Slf4j
+@RequiredArgsConstructor
+@ConditionalOnProperty(name = "notification.enabled", havingValue = "true", matchIfMissing = true)
+public class NcmpAsyncBatchEventConsumer {
+
+    private final EventsPublisher<BatchDataResponseEventV1> eventsPublisher;
+
+    /**
+     * Consume the BatchDataResponseEvent published by producer to topic 'async-m2m.topic'
+     * and publish the same to the client specified topic.
+     *
+     * @param batchEventConsumerRecord consuming event as a ConsumerRecord.
+     */
+    @KafkaListener(
+            topics = "${app.ncmp.async-m2m.topic}",
+            filter = "filterBatchDataResponseEvent",
+            groupId = "ncmp-batch-event-group",
+            properties = {"spring.json.value.default.type=org.onap.cps.ncmp.events.async.BatchDataResponseEventV1"})
+    public void consumeAndPublish(final ConsumerRecord<String, BatchDataResponseEventV1> batchEventConsumerRecord) {
+        log.info("Consuming event payload {} ...", batchEventConsumerRecord.value());
+        final String eventTarget = SerializationUtils
+                .deserialize(batchEventConsumerRecord.headers().lastHeader("eventTarget").value());
+        final String eventId = SerializationUtils
+                .deserialize(batchEventConsumerRecord.headers().lastHeader("eventId").value());
+        eventsPublisher.publishEvent(eventTarget, eventId, batchEventConsumerRecord.headers(),
+                batchEventConsumerRecord.value());
+    }
+}