added handler for oe refresh and close session requests (#332)

* added handler for oe refresh and close session requests

src/Microsoft.SqlTools.ServiceLayer/ObjectExplorer/Contracts/CloseSessionRequest.cs

@@ -0,0 +1,53 @@
+//
+// Copyright (c) Microsoft. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+//
+
+using Microsoft.SqlTools.Hosting.Protocol.Contracts;
+using Microsoft.SqlTools.ServiceLayer.Connection.Contracts;
+
+namespace Microsoft.SqlTools.ServiceLayer.ObjectExplorer.Contracts
+{
+    /// <summary>
+    /// Information returned from a <see cref="CloseSessionRequest"/>.
+    /// Contains success information, a <see cref="SessionId"/> to be used when
+    /// requesting closing an existing session.
+    /// </summary>
+    public class CloseSessionResponse
+    {
+        /// <summary>
+        /// Boolean indicating if the session was closed successfully 
+        /// </summary>
+        public bool Success { get; set; }
+
+        /// <summary>
+        /// Unique ID to use when sending any requests for objects in the
+        /// tree under the node
+        /// </summary>
+        public string SessionId { get; set; }
+    }
+
+    /// <summary>
+    /// Parameters to the <see cref="CloseSessionRequest"/>.
+    /// </summary>
+    public class CloseSessionParams
+    {
+        /// <summary>
+        /// The Id returned from a <see cref="CreateSessionRequest"/>. This
+        /// is used to disambiguate between different trees. 
+        /// </summary>
+        public string SessionId { get; set; }
+    }
+
+    /// <summary>
+    /// Establishes an Object Explorer tree session for a specific connection.
+    /// This will create a connection to a specific server or database, register
+    /// it for use in the 
+    /// </summary>
+    public class CloseSessionRequest
+    {
+        public static readonly
+            RequestType<CloseSessionParams, CloseSessionResponse> Type =
+            RequestType<CloseSessionParams, CloseSessionResponse>.Create("objectexplorer/closesession");
+    }
+}

src/Microsoft.SqlTools.ServiceLayer/ObjectExplorer/Contracts/RefreshRequest.cs

@@ -1,39 +1,56 @@
-//
-// Copyright (c) Microsoft. All rights reserved.
-// Licensed under the MIT license. See LICENSE file in the project root for full license information.
-//
-
+//
+// Copyright (c) Microsoft. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+//
+
 using Microsoft.SqlTools.Hosting.Protocol.Contracts;
-
-namespace Microsoft.SqlTools.ServiceLayer.ObjectExplorer.Contracts
-{
-    /// <summary>
-    /// Parameters to the <see cref="ExpandRequest"/>.
-    /// </summary>
-    public class RefreshParams
-    {
-        /// <summary>
-        /// The Id returned from a <see cref="CreateSessionRequest"/>. This
-        /// is used to disambiguate between different trees. 
-        /// </summary>
-        public string SessionId { get; set; }
-
-        /// <summary>
-        /// Path identifying the node to expand. See <see cref="NodeInfo.NodePath"/> for details
-        /// </summary>
-        public string[] NodePath { get; set; }
-    }
-
-    /// <summary>
-    /// A request to expand a 
-    /// </summary>
-    public class RefreshRequest
-    {
-        /// <summary>
-        /// Returns children of a given node as a <see cref="NodeInfo"/> array.
-        /// </summary>
-        public static readonly
-            RequestType<ExpandParams, NodeInfo[]> Type =
-            RequestType<ExpandParams, NodeInfo[]>.Create("objectexplorer/refresh");
-    }
-}
+
+namespace Microsoft.SqlTools.ServiceLayer.ObjectExplorer.Contracts
+{
+    /// <summary>
+    /// Information returned from a <see cref="RefreshRequest"/>.
+    /// </summary>
+    public class RefreshResponse
+    {
+        /// <summary>
+        /// Unique ID to use when sending any requests for objects in the
+        /// tree under the node
+        /// </summary>
+        public string SessionId { get; set; }
+
+        /// <summary>
+        /// Information describing the expanded nodes in the tree
+        /// </summary>
+        public NodeInfo[] Nodes { get; set; }
+    }
+
+    /// <summary>
+    /// Parameters to the <see cref="ExpandRequest"/>.
+    /// </summary>
+    public class RefreshParams
+    {
+        /// <summary>
+        /// The Id returned from a <see cref="CreateSessionRequest"/>. This
+        /// is used to disambiguate between different trees. 
+        /// </summary>
+        public string SessionId { get; set; }
+
+        /// <summary>
+        /// Path identifying the node to refresh. See <see cref="NodeInfo.NodePath"/> for details
+        /// </summary>
+        public string NodePath { get; set; }
+    }
+
+    /// <summary>
+    /// A request to expand a 
+    /// </summary>
+    public class RefreshRequest
+    {
+        /// <summary>
+        /// Returns children of a given node as a <see cref="NodeInfo"/> array.
+        /// </summary>
+        public static readonly
+            RequestType<RefreshParams, RefreshResponse> Type =
+            RequestType<RefreshParams, RefreshResponse>.Create("objectexplorer/refresh");
+    }
+}