Initial checkin of gRPC to third_party/

third_party/grpc/src/csharp/Grpc.Core/Logging/ConsoleLogger.cs

+#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;
+
+namespace Grpc.Core.Logging
+{
+    /// <summary>Logger that logs to System.Console.</summary>
+    public class ConsoleLogger : ILogger
+    {
+        readonly Type forType;
+        readonly string forTypeString;
+
+        /// <summary>Creates a console logger not associated to any specific type.</summary>
+        public ConsoleLogger() : this(null)
+        {
+        }
+
+        /// <summary>Creates a console logger that logs messsage specific for given type.</summary>
+        private ConsoleLogger(Type forType)
+        {
+            this.forType = forType;
+            if (forType != null)
+            {
+                var namespaceStr = forType.Namespace ?? "";
+                if (namespaceStr.Length > 0)
+                {
+                     namespaceStr += ".";
+                }
+                this.forTypeString = namespaceStr + forType.Name + " ";
+            }
+            else
+            {
+                this.forTypeString = "";
+            }
+        }
+ 
+        /// <summary>
+        /// Returns a logger associated with the specified type.
+        /// </summary>
+        public ILogger ForType<T>()
+        {
+            if (typeof(T) == forType)
+            {
+                return this;
+            }
+            return new ConsoleLogger(typeof(T));
+        }
+
+        /// <summary>Logs a message with severity Debug.</summary>
+        public void Debug(string message)
+        {
+            Log("D", message);
+        }
+
+        /// <summary>Logs a formatted message with severity Debug.</summary>
+        public void Debug(string format, params object[] formatArgs)
+        {
+            Debug(string.Format(format, formatArgs));
+        }
+
+        /// <summary>Logs a message with severity Info.</summary>
+        public void Info(string message)
+        {
+            Log("I", message);
+        }
+
+        /// <summary>Logs a formatted message with severity Info.</summary>
+        public void Info(string format, params object[] formatArgs)
+        {
+            Info(string.Format(format, formatArgs));
+        }
+
+        /// <summary>Logs a message with severity Warning.</summary>
+        public void Warning(string message)
+        {
+            Log("W", message);
+        }
+
+        /// <summary>Logs a formatted message with severity Warning.</summary>
+        public void Warning(string format, params object[] formatArgs)
+        {
+            Warning(string.Format(format, formatArgs));
+        }
+
+        /// <summary>Logs a message and an associated exception with severity Warning.</summary>
+        public void Warning(Exception exception, string message)
+        {
+            Warning(message + " " + exception);
+        }
+
+        /// <summary>Logs a message with severity Error.</summary>
+        public void Error(string message)
+        {
+            Log("E", message);
+        }
+
+        /// <summary>Logs a formatted message with severity Error.</summary>
+        public void Error(string format, params object[] formatArgs)
+        {
+            Error(string.Format(format, formatArgs));
+        }
+
+        /// <summary>Logs a message and an associated exception with severity Error.</summary>
+        public void Error(Exception exception, string message)
+        {
+            Error(message + " " + exception);
+        }
+
+        private void Log(string severityString, string message)
+        {
+            Console.Error.WriteLine("{0}{1} {2}{3}",
+                severityString,
+                DateTime.Now,
+                forTypeString,
+                message);
+        }
+    }
+}