Merge branch 'master' of github.com:grpc/grpc into str_join_with_sep

1 files changed, 94 insertions, 0 deletions

diff --git a/src/csharp/Grpc.Core/ClientBase.cs b/src/csharp/Grpc.Core/ClientBase.cs
new file mode 100644
index 0000000000..a099f96aea
--- /dev/null
+++ b/src/csharp/Grpc.Core/ClientBase.cs
@@ -0,0 +1,94 @@
+#region Copyright notice and license
+
+// Copyright 2015, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#endregion
+
+using System;
+using System.Collections.Generic;
+
+using Grpc.Core.Internal;
+
+namespace Grpc.Core
+{
+    public delegate void MetadataInterceptorDelegate(Metadata metadata);
+
+    /// <summary>
+    /// Base class for client-side stubs.
+    /// </summary>
+    public abstract class ClientBase
+    {
+        readonly Channel channel;
+
+        public ClientBase(Channel channel)
+        {
+            this.channel = channel;
+        }
+
+        /// <summary>
+        /// Can be used to register a custom header (initial metadata) interceptor.
+        /// The delegate each time before a new call on this client is started.
+        /// </summary>
+        public MetadataInterceptorDelegate HeaderInterceptor
+        {
+            get;
+            set;
+        }
+
+        /// <summary>
+        /// Channel associated with this client.
+        /// </summary>
+        public Channel Channel
+        {
+            get
+            {
+                return this.channel;
+            }
+        }
+
+        /// <summary>
+        /// Creates a new call to given method.
+        /// </summary>
+        protected Call<TRequest, TResponse> CreateCall<TRequest, TResponse>(string serviceName, Method<TRequest, TResponse> method, Metadata metadata)
+            where TRequest : class
+            where TResponse : class
+        {
+            var interceptor = HeaderInterceptor;
+            if (interceptor != null)
+            {
+                metadata = metadata ?? new Metadata();
+                interceptor(metadata);
+                metadata.Freeze();
+            }
+            metadata = metadata ?? Metadata.Empty;
+            return new Call<TRequest, TResponse>(serviceName, method, channel, metadata);
+        }
+    }
+}