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				|  |  | +#region Copyright notice and license
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				|  |  | +
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				|  |  | +// Copyright 2015, Google Inc.
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				|  |  | +// All rights reserved.
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				|  |  | +//
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				|  |  | +// Redistribution and use in source and binary forms, with or without
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				|  |  | +// modification, are permitted provided that the following conditions are
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				|  |  | +// met:
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				|  |  | +//
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				|  |  | +//     * Redistributions of source code must retain the above copyright
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				|  |  | +// notice, this list of conditions and the following disclaimer.
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				|  |  | +//     * Redistributions in binary form must reproduce the above
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				|  |  | +// copyright notice, this list of conditions and the following disclaimer
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				|  |  | +// in the documentation and/or other materials provided with the
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				|  |  | +// distribution.
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				|  |  | +//     * Neither the name of Google Inc. nor the names of its
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				|  |  | +// contributors may be used to endorse or promote products derived from
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				|  |  | +// this software without specific prior written permission.
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				|  |  | +//
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				|  |  | +// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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				|  |  | +// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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				|  |  | +// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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				|  |  | +// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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				|  |  | +// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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				|  |  | +// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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				|  |  | +// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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				|  |  | +// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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				|  |  | +// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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				|  |  | +// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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				|  |  | +// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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				|  |  | +
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				|  |  | +#endregion
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				|  |  | +
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				|  |  | +using System;
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				|  |  | +using System.Collections.Generic;
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				|  |  | +
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				|  |  | +namespace Grpc.Core.Logging
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				|  |  | +{
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				|  |  | +    /// <summary>Logger that logs to System.Console.</summary>
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				|  |  | +    public class ConsoleLogger : ILogger
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				|  |  | +    {
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				|  |  | +        readonly Type forType;
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				|  |  | +        readonly string forTypeString;
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				|  |  | +
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				|  |  | +        public ConsoleLogger() : this(null)
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				|  |  | +        {
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				|  |  | +        }
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				|  |  | +
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				|  |  | +        private ConsoleLogger(Type forType)
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				|  |  | +        {
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				|  |  | +            this.forType = forType;
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				|  |  | +            this.forTypeString = forType != null ? forType.FullName + " " : "";
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				|  |  | +        }
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				|  |  | +
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				|  |  | +        public ILogger ForType<T>()
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				|  |  | +        {
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				|  |  | +            if (typeof(T) == forType)
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				|  |  | +            {
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				|  |  | +                return this;
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				|  |  | +            }
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				|  |  | +            return new ConsoleLogger(typeof(T));
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				|  |  | +        }
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				|  |  | +
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				|  |  | +        public void Debug(string message, params object[] formatArgs)
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				|  |  | +        {
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				|  |  | +            Log("D", message, formatArgs);
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				|  |  | +        }
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				|  |  | +
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				|  |  | +        public void Info(string message, params object[] formatArgs)
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				|  |  | +        {
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				|  |  | +            Log("I", message, formatArgs);
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				|  |  | +        }
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				|  |  | +
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				|  |  | +        public void Warning(string message, params object[] formatArgs)
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				|  |  | +        {
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				|  |  | +            Log("W", message, formatArgs);
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				|  |  | +        }
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				|  |  | +
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				|  |  | +        public void Warning(Exception exception, string message, params object[] formatArgs)
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				|  |  | +        {
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				|  |  | +            Log("W", message + " " + exception, formatArgs);
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				|  |  | +        }
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				|  |  | +
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				|  |  | +        public void Error(string message, params object[] formatArgs)
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				|  |  | +        {
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				|  |  | +            Log("E", message, formatArgs);
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				|  |  | +        }
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				|  |  | +
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				|  |  | +        public void Error(Exception exception, string message, params object[] formatArgs)
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				|  |  | +        {
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				|  |  | +            Log("E", message + " " + exception, formatArgs);
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				|  |  | +        }
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				|  |  | +
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				|  |  | +        private void Log(string severityString, string message, object[] formatArgs)
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				|  |  | +        {
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				|  |  | +            Console.Error.WriteLine("{0}{1} {2}{3}",
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				|  |  | +                severityString,
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				|  |  | +                DateTime.Now,
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				|  |  | +                forTypeString,
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				|  |  | +                string.Format(message, formatArgs));
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				|  |  | +        }
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				|  |  | +    }
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				|  |  | +}
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