NCMP Kafka Producer Infrastructure

- Producer configuration and Topic related information.
- Accepted topicParameter and request id from NCMP to process async
- Replacing Springfox and using Springdoc instead

Issue-ID: CPS-829
Change-Id: I369b5ec6c16318220bb218701006918a0bf21419
Signed-off-by: mpriyank <priyank.maheshwari@est.tech>

5 files changed, 147 insertions, 17 deletions

diff --git a/src/main/java/org/onap/cps/ncmp/dmi/config/DmiPluginConfig.java b/src/main/java/org/onap/cps/ncmp/dmi/config/DmiPluginConfig.java
index 31a78111..6106c6af 100644
--- a/src/main/java/org/onap/cps/ncmp/dmi/config/DmiPluginConfig.java
+++ b/src/main/java/org/onap/cps/ncmp/dmi/config/DmiPluginConfig.java
@@ -1,6 +1,6 @@
 /*
  *  ============LICENSE_START=======================================================
- *  Copyright (C) 2021 Nordix Foundation
+ *  Copyright (C) 2021-2022 Nordix Foundation
  *  ================================================================================
  *  Licensed under the Apache License, Version 2.0 (the "License");
  *  you may not use this file except in compliance with the License.
@@ -21,29 +21,23 @@
 package org.onap.cps.ncmp.dmi.config;
 
 import lombok.Getter;
+import org.springdoc.core.GroupedOpenApi;
 import org.springframework.beans.factory.annotation.Value;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.stereotype.Component;
-import springfox.documentation.builders.PathSelectors;
-import springfox.documentation.builders.RequestHandlerSelectors;
-import springfox.documentation.spi.DocumentationType;
-import springfox.documentation.spring.web.plugins.Docket;
 
 
 @Configuration
 public class DmiPluginConfig {
+
     /**
-     * Swagger-ui configuration.
+     * Swagger-ui configuration using springdoc.
      */
-    @Bean("dmi-plugin-docket")
-    public Docket api() {
-        return new Docket(DocumentationType.OAS_30)
-                .groupName("dmi-plugin-docket")
-                .select()
-                .apis(RequestHandlerSelectors.any())
-                .paths(PathSelectors.any())
-                .build();
+    @Bean("dmi-plugin-api")
+    public GroupedOpenApi api() {
+        return GroupedOpenApi.builder().group("dmi-plugin-api")
+                .pathsToMatch("/swagger-ui/**,/swagger-resources/**,/v3/api-docs").build();
     }
 
     @Getter
diff --git a/src/main/java/org/onap/cps/ncmp/dmi/rest/controller/DmiRestController.java b/src/main/java/org/onap/cps/ncmp/dmi/rest/controller/DmiRestController.java
index 653ebf7f..d12b9eee 100644
--- a/src/main/java/org/onap/cps/ncmp/dmi/rest/controller/DmiRestController.java
+++ b/src/main/java/org/onap/cps/ncmp/dmi/rest/controller/DmiRestController.java
@@ -40,6 +40,7 @@ import org.onap.cps.ncmp.dmi.model.YangResources;
 import org.onap.cps.ncmp.dmi.rest.api.DmiPluginApi;
 import org.onap.cps.ncmp.dmi.rest.api.DmiPluginInternalApi;
 import org.onap.cps.ncmp.dmi.service.DmiService;
+import org.onap.cps.ncmp.dmi.service.NcmpKafkaPublisherService;
 import org.onap.cps.ncmp.dmi.service.model.ModuleReference;
 import org.springframework.http.HttpStatus;
 import org.springframework.http.ResponseEntity;
@@ -56,6 +57,8 @@ public class DmiRestController implements DmiPluginApi, DmiPluginInternalApi {
 
     private final ObjectMapper objectMapper;
 
+    private final NcmpKafkaPublisherService ncmpKafkaPublisherService;
+
     private static final Map<OperationEnum, HttpStatus> operationToHttpStatusMap = new HashMap<>(6);
 
     static {
@@ -67,6 +70,7 @@ public class DmiRestController implements DmiPluginApi, DmiPluginInternalApi {
         operationToHttpStatusMap.put(OperationEnum.DELETE, HttpStatus.NO_CONTENT);
     }
 
+
     @Override
     public ResponseEntity<ModuleSet> getModuleReferences(final String cmHandle,
                                                            final @Valid ModuleReferencesRequest body) {
@@ -107,6 +111,7 @@ public class DmiRestController implements DmiPluginApi, DmiPluginInternalApi {
      * @param cmHandle              cm handle identifier
      * @param dataAccessRequest     data Access Request
      * @param optionsParamInQuery   options query parameter
+     * @param topicParamInQuery     optional topic parameter
      * @return {@code ResponseEntity} response entity
      */
     @Override
@@ -114,7 +119,8 @@ public class DmiRestController implements DmiPluginApi, DmiPluginInternalApi {
                                                                    final String cmHandle,
                                                                    final @Valid DataAccessRequest
                                                                                 dataAccessRequest,
-                                                                   final @Valid String optionsParamInQuery) {
+                                                                   final @Valid String optionsParamInQuery,
+                                                                   final String topicParamInQuery) {
         if (isReadOperation(dataAccessRequest)) {
             final String resourceDataAsJson = dmiService.getResourceData(cmHandle,
                 resourceIdentifier,
@@ -130,7 +136,8 @@ public class DmiRestController implements DmiPluginApi, DmiPluginInternalApi {
                                                                final String cmHandle,
                                                                final @Valid DataAccessRequest
                                                                        dataAccessRequest,
-                                                               final @Valid String optionsParamInQuery) {
+                                                               final @Valid String optionsParamInQuery,
+                                                               final String topicParamInQuery) {
         final String sdncResponse;
         if (isReadOperation(dataAccessRequest)) {
             sdncResponse = dmiService.getResourceData(cmHandle,
diff --git a/src/main/java/org/onap/cps/ncmp/dmi/service/NcmpKafkaPublisher.java b/src/main/java/org/onap/cps/ncmp/dmi/service/NcmpKafkaPublisher.java
new file mode 100644
index 00000000..373a09d7
--- /dev/null
+++ b/src/main/java/org/onap/cps/ncmp/dmi/service/NcmpKafkaPublisher.java
@@ -0,0 +1,72 @@
+/*
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2022 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.dmi.service;
+
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.kafka.core.KafkaTemplate;
+import org.springframework.kafka.support.SendResult;
+import org.springframework.stereotype.Component;
+import org.springframework.util.concurrent.ListenableFuture;
+import org.springframework.util.concurrent.ListenableFutureCallback;
+
+@Component
+@Slf4j
+public class NcmpKafkaPublisher {
+
+    private final KafkaTemplate<String, Object> kafkaTemplate;
+    private final String topicName;
+
+    /**
+     * KafkaTemplate and Topic name.
+     *
+     * @param kafkaTemplate kafka template
+     * @param topicName     topic name
+     */
+    @Autowired
+    public NcmpKafkaPublisher(final KafkaTemplate<String, Object> kafkaTemplate,
+            @Value("${app.ncmp.async-m2m.topic}") final String topicName) {
+        this.kafkaTemplate = kafkaTemplate;
+        this.topicName = topicName;
+    }
+
+    /**
+     * Sends message to the configured topic with a message key.
+     *
+     * @param messageKey message key
+     * @param payload    message payload
+     */
+    public void sendMessage(final String messageKey, final Object payload) {
+        final ListenableFuture<SendResult<String, Object>> send = kafkaTemplate.send(topicName, messageKey, payload);
+        send.addCallback(new ListenableFutureCallback<>() {
+            @Override
+            public void onFailure(final Throwable ex) {
+                log.warn("Failed to send the messages {}", ex.getMessage());
+            }
+
+            @Override
+            public void onSuccess(final SendResult<String, Object> result) {
+                log.debug("Sent message {}", result.getProducerRecord());
+            }
+        });
+    }
+}
diff --git a/src/main/java/org/onap/cps/ncmp/dmi/service/NcmpKafkaPublisherService.java b/src/main/java/org/onap/cps/ncmp/dmi/service/NcmpKafkaPublisherService.java
new file mode 100644
index 00000000..f5e1839b
--- /dev/null
+++ b/src/main/java/org/onap/cps/ncmp/dmi/service/NcmpKafkaPublisherService.java
@@ -0,0 +1,44 @@
+/*
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2022 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.dmi.service;
+
+import lombok.AllArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.stereotype.Service;
+
+@Slf4j
+@Service
+@AllArgsConstructor
+public class NcmpKafkaPublisherService {
+
+    private final NcmpKafkaPublisher ncmpKafkaPublisher;
+
+    /**
+     * publish the message to NCMP.
+     *
+     * @param messageKey message key
+     * @param message    message payload
+     */
+    public void publishToNcmp(final String messageKey, final Object message) {
+        log.debug("Publishing message : {} to NCMP with message-key : {}", message, messageKey);
+        ncmpKafkaPublisher.sendMessage(messageKey, message);
+    }
+}
diff --git a/src/main/resources/application.yml b/src/main/resources/application.yml
index 2d324c5b..71a689cd 100644
--- a/src/main/resources/application.yml
+++ b/src/main/resources/application.yml
@@ -1,5 +1,5 @@
 #  ============LICENSE_START=======================================================
-#  Copyright (C) 2021 Nordix Foundation
+#  Copyright (C) 2021-2022 Nordix Foundation
 #  Modifications Copyright (C) 2021 Bell Canada.
 #  ================================================================================
 #  Licensed under the Apache License, Version 2.0 (the "License");
@@ -42,6 +42,19 @@ spring:
   mvc:
     pathmatch:
       matching-strategy: ANT_PATH_MATCHER
+  kafka:
+    bootstrap-servers: ${KAFKA_BOOTSTRAP_SERVER}
+    security:
+      protocol: PLAINTEXT
+    producer:
+      key-serializer: org.apache.kafka.common.serialization.StringSerializer
+      value-serializer: org.springframework.kafka.support.serializer.JsonSerializer
+      client-id: dmi-plugin
+
+app:
+  ncmp:
+    async-m2m:
+      topic: ${NCMP_ASYNC_M2M_TOPIC:ncmp-async-m2m}
 
 # Actuator
 management: