DacFx import/export (#728)

Adding DacFx import/export/deploy/extract functionality

src/Microsoft.SqlTools.ServiceLayer/DacFx/ExtractOperation.cs

@@ -0,0 +1,33 @@
+//
+// Copyright (c) Microsoft. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+//
+using Microsoft.SqlServer.Dac;
+using Microsoft.SqlTools.ServiceLayer.DacFx.Contracts;
+using Microsoft.SqlTools.ServiceLayer.TaskServices;
+using Microsoft.SqlTools.Utility;
+using System;
+using System.Data.SqlClient;
+using System.Diagnostics;
+
+namespace Microsoft.SqlTools.ServiceLayer.DacFx
+{
+    /// <summary>
+    /// Class to represent an in-progress extract operation
+    /// </summary>
+    class ExtractOperation : DacFxOperation
+    {
+        public ExtractParams Parameters { get; }
+
+        public ExtractOperation(ExtractParams parameters, SqlConnection sqlConnection): base(sqlConnection)
+        {
+            Validate.IsNotNull("parameters", parameters);
+            this.Parameters = parameters;
+        }
+
+        public override void Execute()
+        {
+            this.DacServices.Extract(this.Parameters.PackageFilePath, this.Parameters.DatabaseName, this.Parameters.ApplicationName, this.Parameters.ApplicationVersion, null, null, null, this.CancellationToken);
+        }
+    }
+}