Check if the vault has registered servers before removing it

Author: NehaRaje

src/ServiceManagement/RecoveryServices/Commands.RecoveryServices/Properties/Resources.Designer.cs

@@ -274,4 +274,7 @@ Please provide a storage account with the same location as that of the vault.</v
   <data name="VaultDeletionSuccessMessage" xml:space="preserve">
     <value>Vault has been deleted</value>
   </data>
+  <data name="VaultCannotBeDeleted" xml:space="preserve">
+    <value>Vault {0} cannot be deleted as it contains registered servers. Unregister them and then retry the operation.</value>
+  </data>
 </root>

src/ServiceManagement/RecoveryServices/Commands.RecoveryServices/Properties/Resources.resx

@@ -18,6 +18,7 @@
 using Microsoft.Azure.Commands.RecoveryServices.Properties;
 using Microsoft.Azure.Commands.RecoveryServices.SiteRecovery;
 using Microsoft.WindowsAzure.Management.RecoveryServices.Models;
+using Microsoft.WindowsAzure.Management.SiteRecovery.Models;
 
 namespace Microsoft.Azure.Commands.RecoveryServices
 {
@@ -58,6 +59,20 @@ public override void ExecuteCmdlet()
             try
             {
                 // Check if vault has servers registered to it - prevent the operation.
+                // Invocation of the api directly will result in a call similar to purge
+                // But here we can't modify at service level.
+                // Impact of this check on user is that the vault settings file has to be imported for this to work
+                ServerListResponse serverListResponse =
+                    RecoveryServicesClient.GetAzureSiteRecoveryServer();
+
+                if (serverListResponse.Servers.Count != 0)
+                {
+                    throw new InvalidOperationException(
+                        string.Format(
+                        Properties.Resources.VaultCannotBeDeleted,
+                        this.Vault.Name));
+                }
+
                 this.ConfirmAction(
                 this.Force.IsPresent,
                 string.Format(Properties.Resources.RemoveVaultWarning, this.Vault.Name),