[KAFKA] Allow kafka params to be passed as config

Allow topic names to be passed
Add new api endpoint to retrieve the kafka and topic info

Signed-off-by: efiacor <fiachra.corcoran@est.tech>
Issue-ID: DMAAP-1744
Change-Id: Id7bdcf54c6191a5953bc94092218595bf608a733

3 files changed, 109 insertions, 0 deletions

diff --git a/catalog-be/src/main/java/org/openecomp/sdc/be/distribution/DistributionBusinessLogic.java b/catalog-be/src/main/java/org/openecomp/sdc/be/distribution/DistributionBusinessLogic.java
index d293e9b615..7d9c7357c2 100644
--- a/catalog-be/src/main/java/org/openecomp/sdc/be/distribution/DistributionBusinessLogic.java
+++ b/catalog-be/src/main/java/org/openecomp/sdc/be/distribution/DistributionBusinessLogic.java
@@ -42,6 +42,7 @@ import org.openecomp.sdc.be.config.ConfigurationManager;
 import org.openecomp.sdc.be.config.DistributionEngineConfiguration;
 import org.openecomp.sdc.be.dao.api.ActionStatus;
 import org.openecomp.sdc.be.distribution.api.client.CambriaOperationStatus;
+import org.openecomp.sdc.be.distribution.api.client.KafkaDataResponse;
 import org.openecomp.sdc.be.distribution.api.client.RegistrationRequest;
 import org.openecomp.sdc.be.distribution.api.client.ServerListResponse;
 import org.openecomp.sdc.be.distribution.api.client.TopicRegistrationResponse;
@@ -102,6 +103,26 @@ public class DistributionBusinessLogic {
         }
     }
 
+    public Either<KafkaDataResponse, ResponseFormat> getKafkaData() {
+        DistributionEngineConfiguration distributionEngineConfiguration = ConfigurationManager.getConfigurationManager()
+            .getDistributionEngineConfiguration();
+        String bootStrapServers = distributionEngineConfiguration.getKafkaBootStrapServers();
+        if (bootStrapServers != null) {
+            String statusTopicName = DistributionEngineInitTask
+                .buildTopicName(distributionEngineConfiguration.getDistributionStatusTopicName(), distributionEngineConfiguration.getEnvironments().get(0));
+            String notificationTopicName = DistributionEngineInitTask
+                .buildTopicName(distributionEngineConfiguration.getDistributionNotifTopicName(), distributionEngineConfiguration.getEnvironments().get(0));
+            KafkaDataResponse kafkaDataResponse = new KafkaDataResponse();
+            kafkaDataResponse.setKafkaBootStrapServer(bootStrapServers);
+            kafkaDataResponse.setDistrStatusTopicName(statusTopicName);
+            kafkaDataResponse.setDistrNotificationTopicName(notificationTopicName);
+            return Either.left(kafkaDataResponse);
+        } else {
+            ResponseFormat errorResponseWrapper = getResponseFormatManager().getResponseFormat(ActionStatus.GENERAL_ERROR);
+            return Either.right(errorResponseWrapper);
+        }
+    }
+
     public void handleRegistration(Wrapper<Response> responseWrapper, RegistrationRequest registrationRequest, AuditHandler auditHandler) {
         CambriaErrorResponse registerResponse = null;
         try {
diff --git a/catalog-be/src/main/java/org/openecomp/sdc/be/distribution/api/client/KafkaDataResponse.java b/catalog-be/src/main/java/org/openecomp/sdc/be/distribution/api/client/KafkaDataResponse.java
new file mode 100644
index 0000000000..db61e884c5
--- /dev/null
+++ b/catalog-be/src/main/java/org/openecomp/sdc/be/distribution/api/client/KafkaDataResponse.java
@@ -0,0 +1,35 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * SDC
+ * ================================================================================
+ * Copyright (C) 2022 Nordix Foundation. All rights reserved.
+ * ================================================================================
+ * 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.
+ * ============LICENSE_END=========================================================
+ */
+
+package org.openecomp.sdc.be.distribution.api.client;
+
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.Setter;
+
+@Getter
+@Setter
+@NoArgsConstructor
+public class KafkaDataResponse {
+
+    private String kafkaBootStrapServer;
+    private String distrNotificationTopicName;
+    private String distrStatusTopicName;
+}
diff --git a/catalog-be/src/main/java/org/openecomp/sdc/be/distribution/servlet/DistributionServlet.java b/catalog-be/src/main/java/org/openecomp/sdc/be/distribution/servlet/DistributionServlet.java
index ee28d948e0..fb8a34830d 100644
--- a/catalog-be/src/main/java/org/openecomp/sdc/be/distribution/servlet/DistributionServlet.java
+++ b/catalog-be/src/main/java/org/openecomp/sdc/be/distribution/servlet/DistributionServlet.java
@@ -49,6 +49,7 @@ import org.openecomp.sdc.be.config.BeEcompErrorManager;
 import org.openecomp.sdc.be.dao.api.ActionStatus;
 import org.openecomp.sdc.be.distribution.AuditHandler;
 import org.openecomp.sdc.be.distribution.DistributionBusinessLogic;
+import org.openecomp.sdc.be.distribution.api.client.KafkaDataResponse;
 import org.openecomp.sdc.be.distribution.api.client.RegistrationRequest;
 import org.openecomp.sdc.be.distribution.api.client.ServerListResponse;
 import org.openecomp.sdc.be.distribution.api.client.TopicRegistrationResponse;
@@ -150,6 +151,58 @@ public class DistributionServlet extends BeGenericServlet {
     }
 
     /**
+     * @param requestId UUID to track the incoming request
+     * @param instanceId UUID to identify the requesting instance
+     * @param accept Determines the format of the body of the response
+     * @param authorization Username and password auth towards SDC
+     * @return KafkaDataResponse (Kafka bootstrap server and topic list to be used by clients)
+     */
+    @GET
+    @Path("/distributionKafkaData")
+    @Consumes(MediaType.APPLICATION_JSON)
+    @Produces(MediaType.APPLICATION_JSON)
+    @Operation(description = "Kafka data", method = "GET", summary = "return the kafka cluster and topic list", responses = {
+        @ApiResponse(responseCode = "200", description = "ECOMP component is authenticated and kafka endpoint and topic list is returned", content = @Content(array = @ArraySchema(schema = @Schema(implementation = KafkaDataResponse.class)))),
+        @ApiResponse(responseCode = "400", description = "Missing 'X-ECOMP-InstanceID'  HTTP header - POL5001"),
+        @ApiResponse(responseCode = "401", description = "ECOMP component  should authenticate itself  and  to  re-send  again  HTTP  request  with its credentials  for  Basic Authentication - POL5002"),
+        @ApiResponse(responseCode = "403", description = "ECOMP component is not authorized - POL5003"),
+        @ApiResponse(responseCode = "405", description = "Method  Not Allowed: Invalid HTTP method type used ( PUT,DELETE,POST will be rejected) - POL4050"),
+        @ApiResponse(responseCode = "500", description = "The GET request failed either due to internal SDC problem or Cambria Service failure. ECOMP Component should continue the attempts to get the needed information - POL5000")})
+    public Response getKafkaData(
+        @Parameter(description = "X-ECOMP-RequestID header", required = false) @HeaderParam(value = Constants.X_ECOMP_REQUEST_ID_HEADER) String requestId,
+        @Parameter(description = "X-ECOMP-InstanceID header", required = true) @HeaderParam(value = Constants.X_ECOMP_INSTANCE_ID_HEADER) String instanceId,
+        @Parameter(description = "Determines the format of the body of the response", required = false) @HeaderParam(value = Constants.ACCEPT_HEADER) String accept,
+        @Parameter(description = "The username and password", required = true) @HeaderParam(value = Constants.AUTHORIZATION_HEADER) String authorization) {
+        String url = request.getMethod() + " " + request.getRequestURI();
+        log.debug(START_HANDLE_REQUEST_OF, url);
+        ResponseFormat responseFormat;
+        if (instanceId == null) {
+            responseFormat = getComponentsUtils().getResponseFormat(ActionStatus.MISSING_X_ECOMP_INSTANCE_ID);
+            getComponentsUtils().auditGetUebCluster(null, responseFormat.getStatus().toString(), responseFormat.getFormattedMessage());
+            return buildErrorResponse(responseFormat);
+        }
+        try {
+            Response response;
+            Either<KafkaDataResponse, ResponseFormat> actionResponse = distributionLogic.getKafkaData();
+            if (actionResponse.isRight()) {
+                responseFormat = actionResponse.right().value();
+                response = buildErrorResponse(responseFormat);
+            } else {
+                responseFormat = getComponentsUtils().getResponseFormat(ActionStatus.OK);
+                response = buildOkResponse(responseFormat, actionResponse.left().value());
+            }
+            getComponentsUtils().auditGetUebCluster(instanceId, responseFormat.getStatus().toString(), responseFormat.getFormattedMessage());
+            return response;
+        } catch (Exception e) {
+            BeEcompErrorManager.getInstance().logBeRestApiGeneralError("failed to get kafka cluster and topic list from configuration");
+            log.debug("failed to get kafka cluster and topic list from configuration", e);
+            responseFormat = getComponentsUtils().getResponseFormat(ActionStatus.GENERAL_ERROR);
+            getComponentsUtils().auditGetUebCluster(instanceId, responseFormat.getStatus().toString(), responseFormat.getFormattedMessage());
+            return buildErrorResponse(responseFormat);
+        }
+    }
+
+    /**
      * @param requestId
      * @param instanceId
      * @param accept