aahmed-se commented on a change in pull request #3168: Refactor api commands
URL: https://github.com/apache/pulsar/pull/3168#discussion_r242361303
 
 

 ##########
 File path: 
pulsar-functions/worker/src/main/java/org/apache/pulsar/functions/worker/rest/api/ComponentImpl.java
 ##########
 @@ -337,46 +334,36 @@ public Response registerFunction(final String tenant,
             if 
(!worker().getBrokerAdmin().namespaces().getNamespaces(tenant).contains(qualifiedNamespace))
 {
                 log.error("{}/{}/{} Namespace {} does not exist", tenant, 
namespace,
                         componentName, namespace);
-                return 
Response.status(Status.BAD_REQUEST).type(MediaType.APPLICATION_JSON)
-                        .entity(new ErrorData("Namespace does not 
exist")).build();
+                throw new RestException(Status.BAD_REQUEST, "Namespace does 
not exist");
             }
         } catch (PulsarAdminException.NotAuthorizedException e) {
             log.error("{}/{}/{} Client [{}] is not admin and authorized to 
operate {} on tenant", tenant, namespace,
                     componentName, clientRole, componentType);
-            return 
Response.status(Status.UNAUTHORIZED).type(MediaType.APPLICATION_JSON)
-                    .entity(new ErrorData("client is not authorize to perform 
operation")).build();
-
+            throw new RestException(Status.UNAUTHORIZED, "client is not 
authorize to perform operation");
         } catch (PulsarAdminException.NotFoundException e) {
-            log.error("{}/{}/{} Tenant {} does not exist", tenant, namespace,
-                    componentName, tenant);
-            return 
Response.status(Status.BAD_REQUEST).type(MediaType.APPLICATION_JSON)
-                    .entity(new ErrorData("Tenant does not exist")).build();
+            log.error("{}/{}/{} Tenant {} does not exist", tenant, namespace, 
componentName, tenant);
+            throw new RestException(Status.BAD_REQUEST, "Tenant does not 
exist");
         } catch (PulsarAdminException e) {
-            log.error("{}/{}/{} Issues getting tenant data", tenant, namespace,
-                    componentName, e);
-            return 
Response.status(Status.INTERNAL_SERVER_ERROR).type(MediaType.APPLICATION_JSON)
-                    .entity(new ErrorData(e.getMessage())).build();
+            log.error("{}/{}/{} Issues getting tenant data", tenant, 
namespace, componentName, e);
+            throw new RestException(Status.INTERNAL_SERVER_ERROR, 
e.getMessage());
         }
 
         try {
             if (!isAuthorizedRole(tenant, clientRole)) {
                 log.error("{}/{}/{} Client [{}] is not admin and authorized to 
register {}", tenant, namespace,
                         componentName, clientRole, componentType);
-                return 
Response.status(Status.UNAUTHORIZED).type(MediaType.APPLICATION_JSON)
-                        .entity(new ErrorData("client is not authorize to 
perform operation")).build();
+                throw new RestException(Status.UNAUTHORIZED, "client is not 
authorize to perform operation");
             }
         } catch (PulsarAdminException e) {
             log.error("{}/{}/{} Failed to authorize [{}]", tenant, namespace, 
componentName, e);
-            return 
Response.status(Status.INTERNAL_SERVER_ERROR).type(MediaType.APPLICATION_JSON)
-                    .entity(new ErrorData(e.getMessage())).build();
+            throw new RestException(Status.INTERNAL_SERVER_ERROR, 
e.getMessage());
         }
 
         FunctionMetaDataManager functionMetaDataManager = 
worker().getFunctionMetaDataManager();
 
         if (functionMetaDataManager.containsFunction(tenant, namespace, 
componentName)) {
             log.error("{} {}/{}/{} already exists", componentType, tenant, 
namespace, componentName);
-            return 
Response.status(Status.BAD_REQUEST).type(MediaType.APPLICATION_JSON)
-                    .entity(new ErrorData(String.format("%s %s already 
exists", componentType, componentName))).build();
+            throw new RestException(Status.INTERNAL_SERVER_ERROR, 
String.format("%s %s already exists", componentType, componentName));
 
 Review comment:
   reverted the error code.

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