Modify code to limit garbage collectible objects and create method to deploy adapters without custom mapping

Removed creation of ArrayLists when a service is been called and added null validation to those lists in service layer. Developed code to deploy adapters when custom mapping is false and updated exception handling.

components/device-mgt/org.wso2.carbon.device.mgt.api/src/main/java/org/wso2/carbon/device/mgt/jaxrs/beans/analytics/AdapterConfiguration.java

@@ -27,7 +27,7 @@ import java.util.List;
  */
 public class AdapterConfiguration {
     @ApiModelProperty(value = "Adapter properties list")
-    private List<AdapterProperty> adapterProperties = new ArrayList<>();
+    private List<AdapterProperty> adapterProperties;
     @ApiModelProperty(value = "Custom-mapping flag")
     private boolean isCustomMappingEnabled;
     @ApiModelProperty(value = "Mapping configurations")

components/device-mgt/org.wso2.carbon.device.mgt.api/src/main/java/org/wso2/carbon/device/mgt/jaxrs/beans/analytics/AdapterMappingConfiguration.java

@@ -32,15 +32,15 @@ public class AdapterMappingConfiguration {
     @ApiModelProperty(value = "Input mapping for json,text and xml mappings")
     private String inputMappingString;
     @ApiModelProperty(value = "Input mapping for json,map and xml mappings")
-    private List<MappingProperty> inputMappingProperties = new ArrayList<>();
+    private List<MappingProperty> inputMappingProperties;
     @ApiModelProperty(value = "Name-scape mapping for xml mapping")
-    private List<MappingProperty> namespaceMappingProperties = new ArrayList<>();
+    private List<MappingProperty> namespaceMappingProperties;
     @ApiModelProperty(value = "Correlation mapping for wso2 mapping")
-    private List<MappingProperty> correlationMappingProperties = new ArrayList<>();
+    private List<MappingProperty> correlationMappingProperties;
     @ApiModelProperty(value = "Payload mapping for wso2 mapping")
-    private List<MappingProperty> payloadMappingProperties = new ArrayList<>();
+    private List<MappingProperty> payloadMappingProperties;
     @ApiModelProperty(value = "Meta mapping for wso2 mapping")
-    private List<MappingProperty> metaMappingProperties = new ArrayList<>();
+    private List<MappingProperty> metaMappingProperties;
 
     public MessageFormat getMessageFormat() {
         return messageFormat;

components/device-mgt/org.wso2.carbon.device.mgt.api/src/main/java/org/wso2/carbon/device/mgt/jaxrs/beans/analytics/EventStream.java

@@ -36,11 +36,11 @@ public class EventStream {
     @ApiModelProperty(value = "Stream description")
     private String description;
     @ApiModelProperty(value = "Meta attribute list")
-    private List<Attribute> metaData = new ArrayList<>();
+    private List<Attribute> metaData;
     @ApiModelProperty(value = "Correlation attribute list")
-    private List<Attribute> correlationData = new ArrayList<>();
+    private List<Attribute> correlationData;
     @ApiModelProperty(value = "Payload attribute list")
-    private List<Attribute> payloadData = new ArrayList<>();
+    private List<Attribute> payloadData;
 
     @ApiModelProperty(value = "Stream definition" , notes = "use only when creating stream as a String")
     private String definition;

components/device-mgt/org.wso2.carbon.device.mgt.api/src/main/java/org/wso2/carbon/device/mgt/jaxrs/exception/BadRequestException.java

@@ -19,6 +19,7 @@
 package org.wso2.carbon.device.mgt.jaxrs.exception;
 
 import org.wso2.carbon.device.mgt.jaxrs.beans.ErrorResponse;
+import org.wso2.carbon.device.mgt.jaxrs.util.Constants;
 
 import javax.ws.rs.WebApplicationException;
 import javax.ws.rs.core.Response;
@@ -27,8 +28,26 @@ import javax.ws.rs.core.Response;
  * Custom exception class for wrapping BadRequest related exceptions.
  */
 public class BadRequestException extends WebApplicationException {
+    private String message;
+    private static final long serialVersionUID = -24991723711391192L;
 
     public BadRequestException(ErrorResponse error) {
         super(Response.status(Response.Status.BAD_REQUEST).entity(error).build());
     }
+
+    public BadRequestException(ErrorDTO errorDTO) {
+        super(Response.status(Response.Status.INTERNAL_SERVER_ERROR)
+                      .entity(errorDTO)
+                      .header(Constants.DeviceConstants.HEADER_CONTENT_TYPE, Constants.DeviceConstants.APPLICATION_JSON)
+                      .build());
+        message = errorDTO.getMessage();
+    }
+
+    public String getMessage() {
+        return message;
+    }
+
+    public void setMessage(String message) {
+        this.message = message;
+    }
 }

components/device-mgt/org.wso2.carbon.device.mgt.api/src/main/java/org/wso2/carbon/device/mgt/jaxrs/exception/InvalidExecutionPlanException.java

@@ -36,7 +36,7 @@ public class InvalidExecutionPlanException extends WebApplicationException {
                       .entity(errorDTO)
                       .header(Constants.DeviceConstants.HEADER_CONTENT_TYPE, Constants.DeviceConstants.APPLICATION_JSON)
                       .build());
-        message = errorDTO.getDescription();
+        message = errorDTO.getMessage();
     }
 
     @Override

components/device-mgt/org.wso2.carbon.device.mgt.api/src/main/java/org/wso2/carbon/device/mgt/jaxrs/service/impl/AnalyticsArtifactsManagementServiceImpl.java

@@ -18,7 +18,6 @@
 package org.wso2.carbon.device.mgt.jaxrs.service.impl;
 
 import org.wso2.carbon.context.PrivilegedCarbonContext;
-import org.wso2.carbon.device.mgt.jaxrs.beans.ErrorResponse;
 import org.wso2.carbon.device.mgt.jaxrs.beans.analytics.Attribute;
 import org.wso2.carbon.device.mgt.jaxrs.beans.analytics.AdapterMappingConfiguration;
 import org.wso2.carbon.device.mgt.jaxrs.beans.analytics.MappingProperty;
@@ -116,8 +115,12 @@ public class AnalyticsArtifactsManagementServiceImpl
     public Response deployEventDefinitionAsDto(@Valid EventStream stream) {
         String tenantDomain = PrivilegedCarbonContext.getThreadLocalCarbonContext().getTenantDomain();
         try {
+            validateStreamProperties(stream);
             deployStream(stream);
             return Response.ok().build();
+        } catch (BadRequestException e) {
+            log.error(e.getMessage(), e);
+            return e.getResponse();
         } catch (AxisFault e) {
             String errMsg = "Failed to create event definitions for tenant " + tenantDomain;
             log.error(errMsg, e);
@@ -187,6 +190,9 @@ public class AnalyticsArtifactsManagementServiceImpl
             }
             deployReceiver(receiver, customMapping, adapterConfiguration);
             return Response.ok().build();
+        } catch (BadRequestException e) {
+            log.error(e.getMessage(), e);
+            return e.getResponse();
         } catch (AxisFault e) {
             String errMsg = "Failed to create event definitions for tenantDomain: " + tenantDomain;
             log.error(errMsg, e);
@@ -256,6 +262,9 @@ public class AnalyticsArtifactsManagementServiceImpl
             }
             deployPublisher(publisher, customMapping, adapterConfiguration);
             return Response.ok().build();
+        } catch (BadRequestException e) {
+            log.error(e.getMessage(), e);
+            return e.getResponse();
         } catch (AxisFault e) {
             String errMsg = "Failed to create event definitions for tenantDomain: " + tenantDomain;
             log.error(errMsg, e);
@@ -283,8 +292,11 @@ public class AnalyticsArtifactsManagementServiceImpl
                                                  @Valid SiddhiExecutionPlan plan) {
         String tenantDomain = PrivilegedCarbonContext.getThreadLocalCarbonContext().getTenantDomain();
         try {
-            publishSiddhiExecutionPlan(name, isEdited, plan.getDefinition());
+            deploySiddhiExecutionPlan(name, isEdited, plan.getDefinition());
             return Response.ok().build();
+        } catch (InvalidExecutionPlanException e) {
+            log.error(e.getMessage(), e);
+            return e.getResponse();
         } catch (AxisFault e) {
             String errMsg = "Failed to create event definitions for tenantDomain: " + tenantDomain;
             log.error(errMsg, e);
@@ -315,14 +327,6 @@ public class AnalyticsArtifactsManagementServiceImpl
         List<Attribute> metaData = stream.getMetaData();
         List<Attribute> payloadData = stream.getPayloadData();
         List<Attribute> correlationData = stream.getCorrelationData();
-        if (metaData.isEmpty() && correlationData.isEmpty() && payloadData.isEmpty()) {
-            String errMsg = String.format("Failed to validate Stream property attributes of %s:%s",
-                                          stream.getName(), stream.getVersion());
-            ErrorResponse errorResponse = new ErrorResponse();
-            errorResponse.setMessage(errMsg);
-            log.error(errMsg);
-            throw new BadRequestException(errorResponse);
-        }
         try {
             eventStreamAdminServiceStub = DeviceMgtAPIUtils.getEventStreamAdminServiceStub();
 
@@ -331,10 +335,15 @@ public class AnalyticsArtifactsManagementServiceImpl
             eventStreamDefinitionDto.setVersion(stream.getVersion());
             eventStreamDefinitionDto.setNickName(stream.getNickName());
             eventStreamDefinitionDto.setDescription(stream.getDescription());
+            if (metaData != null) {
                 eventStreamDefinitionDto.setMetaData(addEventAttributesToDto(metaData));
+            }
+            if (payloadData != null) {
                 eventStreamDefinitionDto.setPayloadData(addEventAttributesToDto(payloadData));
+            }
+            if (correlationData != null) {
                 eventStreamDefinitionDto.setCorrelationData(addEventAttributesToDto(correlationData));
-
+            }
             String streamId = stream.getName() + ":" + stream.getVersion();
             if (eventStreamAdminServiceStub.getStreamDefinitionDto(streamId) != null) {
                 eventStreamAdminServiceStub.editEventStreamDefinitionAsDto(eventStreamDefinitionDto, streamId);
@@ -344,7 +353,6 @@ public class AnalyticsArtifactsManagementServiceImpl
         } finally {
             cleanup(eventStreamAdminServiceStub);
         }
-
     }
 
     /**
@@ -360,8 +368,8 @@ public class AnalyticsArtifactsManagementServiceImpl
     private void deployReceiver(Adapter receiver, boolean customMapping,
                                 AdapterConfiguration adapterConfiguration)
             throws RemoteException, UserStoreException, JWTClientException {
-        EventReceiverAdminServiceStub eventReceiverAdminServiceStub = DeviceMgtAPIUtils.getEventReceiverAdminServiceStub();
+        EventReceiverAdminServiceStub eventReceiverAdminServiceStub = DeviceMgtAPIUtils
-
+                .getEventReceiverAdminServiceStub();
         try {
             String receiverName = receiver.getAdapterName();
             String adapterType = receiver.getAdapterType().toStringFormatted();
@@ -374,7 +382,9 @@ public class AnalyticsArtifactsManagementServiceImpl
             }
             BasicInputAdapterPropertyDto[] basicInputAdapterPropertyDtos = addReceiverConfigToDto(adapterProperties);
 
-            AdapterMappingConfiguration adapterMappingConfiguration = adapterConfiguration.getAdapterMappingConfiguration();
+            if (customMapping) {
+                AdapterMappingConfiguration adapterMappingConfiguration = adapterConfiguration
+                        .getAdapterMappingConfiguration();
                 MessageFormat messageFormat = adapterMappingConfiguration.getMessageFormat();
                 if (!messageFormat.toString().equals("wso2event")) {
                     EventMappingPropertyDto[] inputMappingPropertyDtos =
@@ -385,20 +395,20 @@ public class AnalyticsArtifactsManagementServiceImpl
                         eventReceiverAdminServiceStub.deployXmlEventReceiverConfiguration(receiverName
                                 , eventStreamWithVersion, adapterType, null
                                 , namespaceMappingPropertyDtos, inputMappingPropertyDtos
-                            , basicInputAdapterPropertyDtos, customMapping);
+                                , basicInputAdapterPropertyDtos, true);
                     } else {
                         if (messageFormat.toString().equals("map")) {
                             eventReceiverAdminServiceStub.deployMapEventReceiverConfiguration(receiverName
                                     , eventStreamWithVersion, adapterType, inputMappingPropertyDtos
-                                , basicInputAdapterPropertyDtos, customMapping);
+                                    , basicInputAdapterPropertyDtos, true);
                         } else if (messageFormat.toString().equals("text")) {
                             eventReceiverAdminServiceStub.deployTextEventReceiverConfiguration(receiverName
                                     , eventStreamWithVersion, adapterType, inputMappingPropertyDtos
-                                , basicInputAdapterPropertyDtos, customMapping);
+                                    , basicInputAdapterPropertyDtos, true);
                         } else {
                             eventReceiverAdminServiceStub.deployJsonEventReceiverConfiguration(receiverName
                                     , eventStreamWithVersion, adapterType, inputMappingPropertyDtos
-                                , basicInputAdapterPropertyDtos, customMapping);
+                                    , basicInputAdapterPropertyDtos, true);
                         }
                     }
                 } else {
@@ -415,14 +425,52 @@ public class AnalyticsArtifactsManagementServiceImpl
                     eventReceiverAdminServiceStub.deployWso2EventReceiverConfiguration(receiverName
                             , eventStreamWithVersion, adapterType, metaMappingPropertyDtos
                             , correlationMappingPropertyDtos, payloadMappingPropertyDtos
-                        , basicInputAdapterPropertyDtos, customMapping
+                            , basicInputAdapterPropertyDtos, true
                             , eventStreamWithVersion);
                 }
+            } else {
+                deployReceiverWithoutMapping(receiverName, eventStreamWithVersion, adapterType,
+                                             eventReceiverAdminServiceStub, basicInputAdapterPropertyDtos);
+            }
         } finally {
             cleanup(eventReceiverAdminServiceStub);
         }
     }
 
+    /**
+     * To deploy receiver if custom mapping is false
+     *
+     * @param receiverName                  Name of the receiver
+     * @param eventStreamWithVersion        Attached event stream of the receiver
+     * @param adapterType                   Adapter type name
+     * @param eventReceiverAdminServiceStub Stub to deploy receiver
+     * @param basicInputAdapterPropertyDtos DTO to attach receiver data
+     * @throws RemoteException Exception that may occur during a remote method call
+     */
+    private void deployReceiverWithoutMapping(String receiverName, String eventStreamWithVersion
+            , String adapterType, EventReceiverAdminServiceStub eventReceiverAdminServiceStub
+            , BasicInputAdapterPropertyDto[] basicInputAdapterPropertyDtos)
+            throws RemoteException {
+        switch (adapterType) {
+            case "iot-event":
+            case "wso2event":
+                eventReceiverAdminServiceStub.deployWso2EventReceiverConfiguration(receiverName
+                        , eventStreamWithVersion, adapterType, null, null
+                        , null, basicInputAdapterPropertyDtos, false
+                        , eventStreamWithVersion);
+                break;
+            case "soap":
+                eventReceiverAdminServiceStub.deployXmlEventReceiverConfiguration(receiverName
+                        , eventStreamWithVersion, adapterType, null, null
+                        , null, basicInputAdapterPropertyDtos, false);
+                break;
+            default:
+                eventReceiverAdminServiceStub.deployTextEventReceiverConfiguration(receiverName
+                        , eventStreamWithVersion, adapterType, null
+                        , basicInputAdapterPropertyDtos, false);
+        }
+    }
+
     /**
      * Set data to a publisher dto and deploy dto through a stub
      *
@@ -436,7 +484,8 @@ public class AnalyticsArtifactsManagementServiceImpl
     private void deployPublisher(Adapter publisher, boolean customMapping,
                                  AdapterConfiguration adapterConfiguration)
             throws RemoteException, UserStoreException, JWTClientException {
-        EventPublisherAdminServiceStub eventPublisherAdminServiceStub = DeviceMgtAPIUtils.getEventPublisherAdminServiceStub();
+        EventPublisherAdminServiceStub eventPublisherAdminServiceStub = DeviceMgtAPIUtils
+                .getEventPublisherAdminServiceStub();
         try {
             String publisherName = publisher.getAdapterName();
             String adapterType = publisher.getAdapterType().toStringFormatted();
@@ -451,25 +500,30 @@ public class AnalyticsArtifactsManagementServiceImpl
             BasicOutputAdapterPropertyDto[] basicOutputAdapterPropertyDtos =
                     addPublisherConfigToDto(adapterProperties);
 
-            AdapterMappingConfiguration adapterMappingConfiguration = adapterConfiguration.getAdapterMappingConfiguration();
+            if (customMapping) {
+                AdapterMappingConfiguration adapterMappingConfiguration = adapterConfiguration
+                        .getAdapterMappingConfiguration();
                 MessageFormat messageFormat = adapterMappingConfiguration.getMessageFormat();
                 if (!messageFormat.toString().equals("wso2event")) {
                     if (!messageFormat.toString().equals("map")) {
                         if (messageFormat.toString().equals("xml")) {
-                        eventPublisherAdminServiceStub.deployXmlEventPublisherConfiguration(publisherName
+                            eventPublisherAdminServiceStub.deployXmlEventPublisherConfiguration(
-                                , eventStreamWithVersion, adapterType, adapterMappingConfiguration.getInputMappingString()
+                                    publisherName, eventStreamWithVersion, adapterType
+                                    , adapterMappingConfiguration.getInputMappingString()
                                     , basicOutputAdapterPropertyDtos, eventStreamWithVersion
-                                , customMapping);
+                                    , true);
                         } else if (messageFormat.toString().equals("text")) {
-                        eventPublisherAdminServiceStub.deployTextEventPublisherConfiguration(publisherName
+                            eventPublisherAdminServiceStub.deployTextEventPublisherConfiguration(
-                                , eventStreamWithVersion, adapterType, adapterMappingConfiguration.getInputMappingString()
+                                    publisherName, eventStreamWithVersion, adapterType
+                                    , adapterMappingConfiguration.getInputMappingString()
                                     , basicOutputAdapterPropertyDtos, eventStreamWithVersion
-                                , customMapping);
+                                    , true);
                         } else {
-                        eventPublisherAdminServiceStub.deployJsonEventPublisherConfiguration(publisherName
+                            eventPublisherAdminServiceStub.deployJsonEventPublisherConfiguration(
-                                , eventStreamWithVersion, adapterType, adapterMappingConfiguration.getInputMappingString()
+                                    publisherName, eventStreamWithVersion, adapterType
+                                    , adapterMappingConfiguration.getInputMappingString()
                                     , basicOutputAdapterPropertyDtos, eventStreamWithVersion
-                                , customMapping);
+                                    , true);
                         }
                     } else {
                         org.wso2.carbon.event.publisher.stub.types.EventMappingPropertyDto[] inputMappingPropertyDtos =
@@ -478,33 +532,83 @@ public class AnalyticsArtifactsManagementServiceImpl
                                 );
                         eventPublisherAdminServiceStub.deployMapEventPublisherConfiguration(publisherName
                                 , eventStreamWithVersion, adapterType, inputMappingPropertyDtos
-                            , basicOutputAdapterPropertyDtos, customMapping);
+                                , basicOutputAdapterPropertyDtos, true);
                     }
                 } else {
-                org.wso2.carbon.event.publisher.stub.types.EventMappingPropertyDto[] correlationMappingPropertyDtos =
+                    org.wso2.carbon.event.publisher.stub.types.EventMappingPropertyDto[]
-                        addPublisherMappingToDto(
+                            correlationMappingPropertyDtos = addPublisherMappingToDto
+                            (
                                     adapterMappingConfiguration.getCorrelationMappingProperties()
                             );
-                org.wso2.carbon.event.publisher.stub.types.EventMappingPropertyDto[] metaMappingPropertyDtos =
+                    org.wso2.carbon.event.publisher.stub.types.EventMappingPropertyDto[]
-                        addPublisherMappingToDto(
+                            metaMappingPropertyDtos = addPublisherMappingToDto
+                            (
                                     adapterMappingConfiguration.getMetaMappingProperties()
                             );
-                org.wso2.carbon.event.publisher.stub.types.EventMappingPropertyDto[] payloadMappingPropertyDtos =
+                    org.wso2.carbon.event.publisher.stub.types.EventMappingPropertyDto[]
-                        addPublisherMappingToDto(
+                            payloadMappingPropertyDtos = addPublisherMappingToDto
+                            (
                                     adapterMappingConfiguration.getPayloadMappingProperties()
                             );
-                eventPublisherAdminServiceStub.deployWSO2EventPublisherConfiguration(publisherName
+                    eventPublisherAdminServiceStub.deployWSO2EventPublisherConfiguration(
-                        , eventStreamWithVersion, adapterType, metaMappingPropertyDtos
+                            publisherName, eventStreamWithVersion, adapterType, metaMappingPropertyDtos
                             , correlationMappingPropertyDtos, payloadMappingPropertyDtos
-                        , basicOutputAdapterPropertyDtos, customMapping
+                            , basicOutputAdapterPropertyDtos, true
                             , eventStreamWithVersion);
                 }
+            } else {
+                deployPublisherWithoutMapping(publisherName, eventStreamWithVersion, adapterType
+                        , eventPublisherAdminServiceStub, basicOutputAdapterPropertyDtos);
+            }
 
         } finally {
             cleanup(eventPublisherAdminServiceStub);
         }
     }
 
+    /**
+     * To deploy publisher if custom mapping is false
+     *
+     * @param publisherName                  Name of the publisher
+     * @param eventStreamWithVersion         Attached event stream of the publisher
+     * @param adapterType                    Adapter type name
+     * @param eventPublisherAdminServiceStub Stub to deploy publisher
+     * @param basicOutputAdapterPropertyDtos DTO to attach publisher data
+     * @throws RemoteException Exception that may occur during a remote method call
+     */
+    private void deployPublisherWithoutMapping(String publisherName, String eventStreamWithVersion
+            , String adapterType, EventPublisherAdminServiceStub eventPublisherAdminServiceStub
+            , BasicOutputAdapterPropertyDto[] basicOutputAdapterPropertyDtos)
+            throws RemoteException {
+        switch (adapterType) {
+            case "wso2event":
+            case "ui":
+            case "secured-websocket":
+                eventPublisherAdminServiceStub.deployWSO2EventPublisherConfiguration(publisherName
+                        , eventStreamWithVersion, adapterType, null
+                        , null, null, basicOutputAdapterPropertyDtos
+                        , false, eventStreamWithVersion);
+                break;
+            case "soap":
+                eventPublisherAdminServiceStub.deployXmlEventPublisherConfiguration(publisherName
+                        , eventStreamWithVersion, adapterType, null
+                        , basicOutputAdapterPropertyDtos, eventStreamWithVersion
+                        , false);
+                break;
+            case "cassandra":
+            case "rdbms":
+                eventPublisherAdminServiceStub.deployMapEventPublisherConfiguration(publisherName
+                        , eventStreamWithVersion, adapterType, null
+                        , basicOutputAdapterPropertyDtos, false);
+                break;
+            default:
+                eventPublisherAdminServiceStub.deployTextEventPublisherConfiguration(publisherName
+                        , eventStreamWithVersion, adapterType, null
+                        , basicOutputAdapterPropertyDtos, eventStreamWithVersion
+                        , false);
+        }
+    }
+
     /**
      * Publish a siddhi execution plan using a stub
      *
@@ -516,9 +620,9 @@ public class AnalyticsArtifactsManagementServiceImpl
      * @throws JWTClientException            Exception that may occur during connecting to client store
      * @throws InvalidExecutionPlanException Exception that may occur if execution plan validation fails
      */
-    private void publishSiddhiExecutionPlan(String name, boolean isEdited,
+    private void deploySiddhiExecutionPlan(String name, boolean isEdited, String plan)
-                                            String plan)
+            throws RemoteException, UserStoreException, JWTClientException,
-            throws RemoteException, UserStoreException, JWTClientException {
+                   InvalidExecutionPlanException {
         EventProcessorAdminServiceStub eventProcessorAdminServiceStub = null;
         try {
             eventProcessorAdminServiceStub = DeviceMgtAPIUtils.getEventProcessorAdminServiceStub();
@@ -532,7 +636,6 @@ public class AnalyticsArtifactsManagementServiceImpl
             } else {
                 ErrorDTO errorDTO = new ErrorDTO();
                 errorDTO.setMessage(validationResponse);
-                log.error(validationResponse);
                 throw new InvalidExecutionPlanException(errorDTO);
             }
         } finally {
@@ -541,20 +644,21 @@ public class AnalyticsArtifactsManagementServiceImpl
     }
 
     /**
-     * This will set payload of event attribute's mapping to the DTO
+     * Validate stream properties
      *
-     * @param attributes list of event attributes
+     * @param stream EventStream object
-     * @return DTO with all the event attributes
      */
-    private EventStreamAttributeDto[] addEventAttributesToDto(List<Attribute> attributes) {
+    private void validateStreamProperties(EventStream stream) throws BadRequestException {
-        EventStreamAttributeDto[] eventStreamAttributeDtos = new EventStreamAttributeDto[attributes.size()];
+        if ((stream.getMetaData() == null || stream.getMetaData().isEmpty()) &&
-        for (Attribute attribute : attributes) {
+            (stream.getCorrelationData() == null || stream.getCorrelationData().isEmpty()) &&
-            EventStreamAttributeDto eventStreamAttributeDto = new EventStreamAttributeDto();
+            (stream.getPayloadData() == null || stream.getPayloadData().isEmpty())) {
-            eventStreamAttributeDto.setAttributeName(attribute.getName());
+            String errMsg = String.format("Failed to validate Stream property attributes of %s:%s. " +
-            eventStreamAttributeDto.setAttributeType(attribute.getType().toString());
+                                          "Stream mapping can't be null or empty",
-
+                                          stream.getName(), stream.getVersion());
+            ErrorDTO errorDTO = new ErrorDTO();
+            errorDTO.setMessage(errMsg);
+            throw new BadRequestException(errorDTO);
         }
-        return eventStreamAttributeDtos;
     }
 
     /**
@@ -562,13 +666,13 @@ public class AnalyticsArtifactsManagementServiceImpl
      *
      * @param adapterProperties Adapter payload attributes
      */
-    private void validateAdapterProperties(List<AdapterProperty> adapterProperties) {
+    private void validateAdapterProperties(List<AdapterProperty> adapterProperties)
-        if (adapterProperties.isEmpty()) {
+            throws BadRequestException {
-            String errMsg = "Invalid payload: event property attributes invalid!!!";
+        if (adapterProperties == null) {
-            ErrorResponse errorResponse = new ErrorResponse();
+            String errMsg = "Failed to validate adapter attributes. Adapter attributes can't be null";
-            errorResponse.setMessage(errMsg);
+            ErrorDTO errorDTO = new ErrorDTO();
-            log.error(errMsg);
+            errorDTO.setMessage(errMsg);
-            throw new BadRequestException(errorResponse);
+            throw new BadRequestException(errorDTO);
         }
     }
 
@@ -583,23 +687,51 @@ public class AnalyticsArtifactsManagementServiceImpl
      *
      * @param adapterMappingConfiguration Adapter mapping attributes
      */
-    private void validateAdapterMapping(AdapterMappingConfiguration adapterMappingConfiguration) {
+    private void validateAdapterMapping(AdapterMappingConfiguration adapterMappingConfiguration)
+            throws BadRequestException {
+        if (adapterMappingConfiguration == null) {
+            String errMsg = "Failed to validate adapter mapping attributes. " +
+                            "Adapter mapping configuration can't be null";
+            ErrorDTO errorDTO = new ErrorDTO();
+            errorDTO.setMessage(errMsg);
+            throw new BadRequestException(errorDTO);
+        } else if (adapterMappingConfiguration.getMessageFormat() == null ||
+                   ((adapterMappingConfiguration.getInputMappingString() == null)
+                    && (adapterMappingConfiguration.getInputMappingProperties() == null ||
+                        adapterMappingConfiguration.getInputMappingProperties().isEmpty())
+                    && (adapterMappingConfiguration.getNamespaceMappingProperties() == null ||
+                        adapterMappingConfiguration.getNamespaceMappingProperties().isEmpty()))
+                   &&
+                   ((adapterMappingConfiguration.getCorrelationMappingProperties() == null ||
+                     adapterMappingConfiguration.getCorrelationMappingProperties().isEmpty())
+                    && (adapterMappingConfiguration.getPayloadMappingProperties() == null ||
+                        adapterMappingConfiguration.getPayloadMappingProperties().isEmpty())
+                    && (adapterMappingConfiguration.getMetaMappingProperties() == null ||
+                        adapterMappingConfiguration.getMetaMappingProperties().isEmpty()))
+        ) {
+            String errMsg = "Failed to validate adapter mapping attributes. " +
+                            "Adapter mapping configuration invalid";
+            ErrorDTO errorDTO = new ErrorDTO();
+            errorDTO.setMessage(errMsg);
+            throw new BadRequestException(errorDTO);
+        }
+    }
 
-        if (adapterMappingConfiguration.getInputMappingString() == null &&
+    /**
-            (adapterMappingConfiguration.getInputMappingProperties().isEmpty() &&
+     * This will set payload of event attribute's mapping to the DTO
-             adapterMappingConfiguration.getNamespaceMappingProperties().isEmpty()) &&
+     *
-            (
+     * @param attributes list of event attributes
-                    adapterMappingConfiguration.getCorrelationMappingProperties().isEmpty() &&
+     * @return DTO with all the event attributes
-                    adapterMappingConfiguration.getPayloadMappingProperties().isEmpty() &&
+     */
-                    adapterMappingConfiguration.getMetaMappingProperties().isEmpty()
+    private EventStreamAttributeDto[] addEventAttributesToDto(List<Attribute> attributes) {
-            )
+        EventStreamAttributeDto[] eventStreamAttributeDtos = new EventStreamAttributeDto[attributes.size()];
-            || adapterMappingConfiguration.getMessageFormat() == null) {
+        for (int i = 0; i < attributes.size(); i++) {
-            String errMsg = "Invalid payload: event mapping attributes invalid!!!";
+            EventStreamAttributeDto eventStreamAttributeDto = new EventStreamAttributeDto();
-            ErrorResponse errorResponse = new ErrorResponse();
+            eventStreamAttributeDto.setAttributeName(attributes.get(i).getName());
-            errorResponse.setMessage(errMsg);
+            eventStreamAttributeDto.setAttributeType(attributes.get(i).getType().toString());
-            log.error(errMsg);
+            eventStreamAttributeDtos[i] = eventStreamAttributeDto;
-            throw new BadRequestException(errorResponse);
         }
+        return eventStreamAttributeDtos;
     }
 
     /**