Tuesday, April 2, 2019

Interface vs Abstract Class in C#


Feature
Interface
Abstract Class
Definition
An interface cannot provide any code, just the signature.
An abstract class can provide complete, default code and/or just the details that have to be overridden.
Access Modifiers

Everything Public
Can have public, private, internal for any method  , function.
Adding functionality (Versioning)


If we add a new method to an Interface then we have to track down all the implementations of the interface and define implementation for the new method.
If we add a new method to an abstract class then we have the option of providing default implementation and therefore all the existing code might work properly.
When to use
If various implementations only share method signatures then it is better to use Interfaces.

If various implementations are of the same kind and use common behavior or status then abstract class is better to use.

Multiple inheritance
A class may inherit several interfaces.
A class may inherit only one abstract class.


Monday, March 11, 2019

Service Fabric Deployment via Power shell

Here is the power-shell to deploy Service fabric application. 
Just change Service Instances and Application Instances Variable as highlighted below.


clear

$sfURL = 'locahost:19080'

$AppPkgPathInImageStore = 'ProcessENTSFApp'
$sfApplicationBaseName = 'fabric:/rsoni.ENT.Process.SFApp'        
$sfApplicationName=''
$sfApplicationTypeName ='rsoni.ENT.Process.SFAppType'
$sfApplicationTypeVersion='1.0.0'
$sfAppServiceTypeName = 'rsoni.ENT.Process.Service.ProcessENTType'
$AppFolderPath = 'C:\GitMapping\ENTSolution\rsoni.ENT.Process.SFApp\pkg\Debug'
$TotalServiceInstances=5
$TotalApplicationInstances=4


$connectArgs = @{  ConnectionEndpoint = $sfURL;  WindowsCredential = $True;  }

#Connect-ServiceFabricCluster @connectArgs

Connect-ServiceFabricCluster 

#-ConnectionEndpoint $sfURL



$OnlyRemove=1






$sfAppType=Get-ServiceFabricApplicationType -ApplicationTypeName  $sfApplicationTypeName  -ApplicationTypeVersion $sfApplicationTypeVersion




if ($sfAppType)


{


   if ($OnlyRemove -eq 1)


    {


        $sfApps=  Get-ServiceFabricApplication -ApplicationTypeName $sfApplicationTypeName  


        foreach ($sfAppobj in $sfApps)


        {


             $sfApplicationName =$sfAppobj.ApplicationName


             $sfApp = Get-ServiceFabricApplication -ApplicationName $sfApplicationName




             if($sfApp)


                {


                        for ($i=1 ;$i -le $TotalServiceInstances ; $i++)


                        {


                            $sName =$sfApplicationName +'/'+ $sfAppServiceTypeName+'_'+$i


   


                            $sfAppService0=Get-ServiceFabricService -ServiceName $sName    -ApplicationName $sfApplicationName


                            if ($sfAppService0)


                            {


                                Write-Output "Removing  Service for $sName "


                                Remove-ServiceFabricService  -ServiceName $sName -ForceRemove -Force


                            }




                        }




                    #Get-ServiceFabricServiceType


           


                    Remove-ServiceFabricApplication -ApplicationName $sfApplicationName -ForceRemove -Force




                }


        }




        Unregister-ServiceFabricApplicationType $sfApplicationTypeName $sfApplicationTypeVersion -Force


        Remove-ServiceFabricApplicationPackage -ApplicationPackagePathInImageStore $AppPkgPathInImageStore


    }


}


else


{


    if ($OnlyRemove -eq 0)


    {


        #Register Application Type


        #Copy-ServiceFabricApplicationPackage -ApplicationPackagePath $AppFolderPath -CompressPackage -SkipCopy


        Copy-ServiceFabricApplicationPackage -ApplicationPackagePath $AppFolderPath -ApplicationPackagePathInImageStore   $AppPkgPathInImageStore -TimeoutSec 1800


        Register-ServiceFabricApplicationType -ApplicationPathInImageStore $AppPkgPathInImageStore




        for ($ap=1 ;$ap -le $TotalApplicationInstances ; $ap++)


        {


            $sfApplicationName =$sfApplicationBaseName+'_'+$ap




            $sfApp = Get-ServiceFabricApplication -ApplicationName $sfApplicationName


      


            Write-Output "Creating New Application"


            New-ServiceFabricApplication -ApplicationName $sfApplicationName -ApplicationTypeName $sfApplicationTypeName -ApplicationTypeVersion $sfApplicationTypeVersion




            for ($i=1 ;$i -le $TotalServiceInstances ; $i++)


                {


                    $sName =$sfApplicationName +'/'+ $sfAppServiceTypeName+'_'+$i


                    $sfAppService0=Get-ServiceFabricService -ServiceName $sName    -ApplicationName $sfApplicationName


                    if (!$sfAppService0)


                    {


                        Write-Output "Creating Service for $sName "


                        #New-ServiceFabricService -Stateless -ServiceName $sName  -ApplicationName $sfApplicationName  -ServiceTypeName $sfAppServiceTypeName -InstanceCount 1 -PartitionSchemeSingleton -ServicePackageActivationMode ExclusiveProcess


                        New-ServiceFabricService -Stateful -ServiceName $sName  -ApplicationName $sfApplicationName  -ServiceTypeName $sfAppServiceTypeName -PartitionSchemeSingleton -ServicePackageActivationMode ExclusiveProcess -TargetReplicaSetSize 1 -MinReplicaSetSize 1


                    }


                }


          }


     }




}

exit


 

Tuesday, October 23, 2018

Copy Data from Azure SQL to Azure Data Lake via Azure Data Factory




First create app Registration and give access to Azure Data Lake




Now create a new app registration



Provide details for App registration



Copy the Application ID and then Generate a key
App Id - 4f0fcf16-e148-411e-8b91-92c600d83c9e

Key



Once Key and AppId is created go back to Azure Data lake to provide permission





Go to Access and select the App Registration we created



Then Select permission for Read, Write and Execute



Now this new App Registration will have access for Azure Data Lake.





Now in Azure Data Factory  first go to Copy Data Wizard.



Now Select Source, which is SQL Server existing Connection




Create a new Azure Data Lake linked service for Destination



Provide the details of Azure Data Lake Store




Also Provide the Service Principal key to Access



Click on Test Connection - "Connection Successful" means connected.

Select Folder for Data Lake Store




Go Next  with default options








Summery before executing the pipeline.




Now you will see if Copy pipeline execution is Completed.





you can also see in Monitor tab for the Pipeline runs successfully.



Now go back to Data Lake Store  and click Data Explorer, you will see a new file created there for ADFDemo





Once you open this ADF Demo File you will see the comma separated values.




This is how we can copy data from SQL Server to Azure Data lake via Azure Data factory.






Monday, October 22, 2018

Get List of SQL Tables where Record Count is more then 100


Here is the query to run in SSMS

Select * from
(
SELECT
      QUOTENAME(SCHEMA_NAME(sOBJ.schema_id)) + '.' + QUOTENAME(sOBJ.name) AS [TableName]
      , SUM(sPTN.Rows) AS [RowsCount]
FROM
      sys.objects AS sOBJ
      INNER JOIN sys.partitions AS sPTN
            ON sOBJ.object_id = sPTN.object_id
WHERE
      sOBJ.type = 'U'
      AND sOBJ.is_ms_shipped = 0x0
      AND index_id < 2 -- 0:Heap, 1:Clustered
GROUP BY
      sOBJ.schema_id
      , sOBJ.name) x
Where x.[RowsCount]>100
ORDER BY x.TableName
GO