Shifting handler-running methods to shared location (#1851)

* Shifting helper methods to shared location

* widening scope

src/Microsoft.SqlTools.ServiceLayer/SqlProjects/SqlProjectsService.cs

@@ -18,7 +18,7 @@ namespace Microsoft.SqlTools.ServiceLayer.SqlProjects
     /// <summary>
     /// Main class for SqlProjects service
     /// </summary>
-    class SqlProjectsService
+    public sealed class SqlProjectsService : BaseService
     {
         private static readonly Lazy<SqlProjectsService> instance = new Lazy<SqlProjectsService>(() => new SqlProjectsService());
 
@@ -216,74 +216,6 @@ namespace Microsoft.SqlTools.ServiceLayer.SqlProjects
 
         #region Helper methods
 
-        /// <summary>
-        /// Synchronous action with standard ResultStatus
-        /// </summary>
-        /// <param name="action"></param>
-        /// <param name="requestContext"></param>
-        /// <returns></returns>
-        private async Task RunWithErrorHandling(Action action, RequestContext<ResultStatus> requestContext)
-        {
-            await RunWithErrorHandling(async () => await Task.Run(action), requestContext);
-        }
-
-        /// <summary>
-        /// Asynchronous action with standard ResultStatus
-        /// </summary>
-        /// <param name="action"></param>
-        /// <param name="requestContext"></param>
-        /// <returns></returns>
-        private async Task RunWithErrorHandling(Func<Task> action, RequestContext<ResultStatus> requestContext)
-        {
-            await RunWithErrorHandling<ResultStatus>(async () =>
-            {
-                await action();
-
-                return new ResultStatus()
-                {
-                    Success = true,
-                    ErrorMessage = null
-                };
-            }, requestContext);
-        }
-
-
-        /// <summary>
-        /// Synchronous action with custom result
-        /// </summary>
-        /// <typeparam name="T"></typeparam>
-        /// <param name="action"></param>
-        /// <param name="requestContext"></param>
-        /// <returns></returns>
-        private async Task RunWithErrorHandling<T>(Func<T> action, RequestContext<T> requestContext) where T : ResultStatus, new()
-        {
-            await RunWithErrorHandling<T>(async () => await Task.Run(action), requestContext);
-        }
-
-        /// <summary>
-        /// Asynchronous action with custom result
-        /// </summary>
-        /// <typeparam name="T"></typeparam>
-        /// <param name="action"></param>
-        /// <param name="requestContext"></param>
-        /// <returns></returns>
-        private async Task RunWithErrorHandling<T>(Func<Task<T>> action, RequestContext<T> requestContext) where T : ResultStatus, new()
-        {
-            try
-            {
-                T result = await action();
-                await requestContext.SendResult(result);
-            }
-            catch (Exception ex)
-            {
-                await requestContext.SendResult(new T()
-                {
-                    Success = false,
-                    ErrorMessage = ex.Message
-                });
-            }
-        }
-
         private SqlProject GetProject(string projectUri)
         {
             if (!Projects.ContainsKey(projectUri))

src/Microsoft.SqlTools.ServiceLayer/Utility/BaseService.cs

@@ -0,0 +1,89 @@
+//
+// Copyright (c) Microsoft. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+//
+
+using System;
+using System.Threading.Tasks;
+using Microsoft.SqlTools.Hosting.Protocol;
+
+namespace Microsoft.SqlTools.ServiceLayer.Utility
+{
+    /// <summary>
+    /// Base class for services that contains helpful methods
+    /// </summary>
+    public abstract class BaseService
+    {
+        #region Runners with error handling
+
+        /// <summary>
+        /// Synchronous action with standard ResultStatus
+        /// </summary>
+        /// <param name="action"></param>
+        /// <param name="requestContext"></param>
+        /// <returns></returns>
+        public static async Task RunWithErrorHandling(Action action, RequestContext<ResultStatus> requestContext)
+        {
+            await RunWithErrorHandling(async () => await Task.Run(action), requestContext);
+        }
+
+        /// <summary>
+        /// Asynchronous action with standard ResultStatus
+        /// </summary>
+        /// <param name="action"></param>
+        /// <param name="requestContext"></param>
+        /// <returns></returns>
+        public static async Task RunWithErrorHandling(Func<Task> action, RequestContext<ResultStatus> requestContext)
+        {
+            await RunWithErrorHandling<ResultStatus>(async () =>
+            {
+                await action();
+
+                return new ResultStatus()
+                {
+                    Success = true,
+                    ErrorMessage = null
+                };
+            }, requestContext);
+        }
+
+
+        /// <summary>
+        /// Synchronous action with custom result
+        /// </summary>
+        /// <typeparam name="T"></typeparam>
+        /// <param name="action"></param>
+        /// <param name="requestContext"></param>
+        /// <returns></returns>
+        public static async Task RunWithErrorHandling<T>(Func<T> action, RequestContext<T> requestContext) where T : ResultStatus, new()
+        {
+            await RunWithErrorHandling<T>(async () => await Task.Run(action), requestContext);
+        }
+
+        /// <summary>
+        /// Asynchronous action with custom result
+        /// </summary>
+        /// <typeparam name="T"></typeparam>
+        /// <param name="action"></param>
+        /// <param name="requestContext"></param>
+        /// <returns></returns>
+        public static async Task RunWithErrorHandling<T>(Func<Task<T>> action, RequestContext<T> requestContext) where T : ResultStatus, new()
+        {
+            try
+            {
+                T result = await action();
+                await requestContext.SendResult(result);
+            }
+            catch (Exception ex)
+            {
+                await requestContext.SendResult(new T()
+                {
+                    Success = false,
+                    ErrorMessage = ex.Message
+                });
+            }
+        }
+
+        #endregion
+    }
+}