Merge pull request #6895 from dgquintas/async_docs_fixit

Added docs to server's shutdown docstrings
diff --git a/src/csharp/Grpc.Core/Grpc.Core.csproj b/src/csharp/Grpc.Core/Grpc.Core.csproj
index a8b7b5f..a796911 100644
--- a/src/csharp/Grpc.Core/Grpc.Core.csproj
+++ b/src/csharp/Grpc.Core/Grpc.Core.csproj
@@ -136,6 +136,8 @@
     <Compile Include="Internal\ClientSideStatus.cs" />
     <Compile Include="Internal\ClockType.cs" />
     <Compile Include="Internal\CallError.cs" />
+    <Compile Include="Logging\LogLevel.cs" />
+    <Compile Include="Logging\LogLevelFilterLogger.cs" />
   </ItemGroup>
   <ItemGroup>
     <None Include="Grpc.Core.nuspec" />
diff --git a/src/csharp/Grpc.Core/GrpcEnvironment.cs b/src/csharp/Grpc.Core/GrpcEnvironment.cs
index 0359d90..e9e4cb4 100644
--- a/src/csharp/Grpc.Core/GrpcEnvironment.cs
+++ b/src/csharp/Grpc.Core/GrpcEnvironment.cs
@@ -47,6 +47,7 @@
     /// </summary>
     public class GrpcEnvironment
     {
+        const LogLevel DefaultLogLevel = LogLevel.Info;
         const int MinDefaultThreadPoolSize = 4;
 
         static object staticLock = new object();
@@ -57,7 +58,7 @@
         static readonly HashSet<Channel> registeredChannels = new HashSet<Channel>();
         static readonly HashSet<Server> registeredServers = new HashSet<Server>();
 
-        static ILogger logger = new ConsoleLogger();
+        static ILogger logger = new LogLevelFilterLogger(new ConsoleLogger(), DefaultLogLevel);
 
         readonly object myLock = new object();
         readonly GrpcThreadPool threadPool;
diff --git a/src/csharp/Grpc.Core/Logging/LogLevel.cs b/src/csharp/Grpc.Core/Logging/LogLevel.cs
new file mode 100644
index 0000000..d64e1f5
--- /dev/null
+++ b/src/csharp/Grpc.Core/Logging/LogLevel.cs
@@ -0,0 +1,59 @@
+#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>Standard logging levels.</summary>
+    public enum LogLevel
+    {
+        /// <summary>
+        /// Debug severity.
+        /// </summary>
+        Debug = 0,
+        /// <summary>
+        /// Info severity.
+        /// </summary>
+        Info,
+        /// <summary>
+        /// Warning severity.
+        /// </summary>
+        Warning,
+        /// <summary>
+        /// Error severity.
+        /// </summary>
+        Error
+    }
+}
diff --git a/src/csharp/Grpc.Core/Logging/LogLevelFilterLogger.cs b/src/csharp/Grpc.Core/Logging/LogLevelFilterLogger.cs
new file mode 100644
index 0000000..4eeb79c
--- /dev/null
+++ b/src/csharp/Grpc.Core/Logging/LogLevelFilterLogger.cs
@@ -0,0 +1,160 @@
+#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 System.Globalization;
+using System.IO;
+using Grpc.Core.Utils;
+
+namespace Grpc.Core.Logging
+{
+    /// <summary>Logger that filters out messages below certain log level.</summary>
+    public class LogLevelFilterLogger : ILogger
+    {
+        readonly ILogger innerLogger;
+        readonly LogLevel logLevel;
+
+        /// <summary>
+        /// Creates and instance of <c>LogLevelFilter.</c>
+        /// </summary>
+        public LogLevelFilterLogger(ILogger logger, LogLevel logLevel)
+        {
+            this.innerLogger = GrpcPreconditions.CheckNotNull(logger);
+            this.logLevel = logLevel;
+        }
+
+        /// <summary>
+        /// Returns a logger associated with the specified type.
+        /// </summary>
+        public virtual ILogger ForType<T>()
+        {
+            var newInnerLogger = innerLogger.ForType<T>();
+            if (object.ReferenceEquals(this.innerLogger, newInnerLogger))
+            {
+                return this;
+            }
+            return new LogLevelFilterLogger(newInnerLogger, logLevel);
+        }
+
+        /// <summary>Logs a message with severity Debug.</summary>
+        public void Debug(string message)
+        {
+            if (logLevel <= LogLevel.Debug)
+            {
+                innerLogger.Debug(message);
+            }
+        }
+
+        /// <summary>Logs a formatted message with severity Debug.</summary>
+        public void Debug(string format, params object[] formatArgs)
+        {
+            if (logLevel <= LogLevel.Debug)
+            {
+                innerLogger.Debug(format, formatArgs);
+            }
+        }
+
+        /// <summary>Logs a message with severity Info.</summary>
+        public void Info(string message)
+        {
+            if (logLevel <= LogLevel.Info)
+            {
+                innerLogger.Info(message);
+            }
+        }
+
+        /// <summary>Logs a formatted message with severity Info.</summary>
+        public void Info(string format, params object[] formatArgs)
+        {
+            if (logLevel <= LogLevel.Info)
+            {
+                innerLogger.Info(format, formatArgs);
+            }
+        }
+
+        /// <summary>Logs a message with severity Warning.</summary>
+        public void Warning(string message)
+        {
+            if (logLevel <= LogLevel.Warning)
+            {
+                innerLogger.Warning(message);
+            }
+        }
+
+        /// <summary>Logs a formatted message with severity Warning.</summary>
+        public void Warning(string format, params object[] formatArgs)
+        {
+            if (logLevel <= LogLevel.Warning)
+            {
+                innerLogger.Warning(format, formatArgs);
+            }
+        }
+
+        /// <summary>Logs a message and an associated exception with severity Warning.</summary>
+        public void Warning(Exception exception, string message)
+        {
+            if (logLevel <= LogLevel.Warning)
+            {
+                innerLogger.Warning(exception, message);
+            }
+        }
+
+        /// <summary>Logs a message with severity Error.</summary>
+        public void Error(string message)
+        {
+            if (logLevel <= LogLevel.Error)
+            {
+                innerLogger.Error(message);
+            }
+        }
+
+        /// <summary>Logs a formatted message with severity Error.</summary>
+        public void Error(string format, params object[] formatArgs)
+        {
+            if (logLevel <= LogLevel.Error)
+            {
+                innerLogger.Error(format, formatArgs);
+            }
+        }
+
+        /// <summary>Logs a message and an associated exception with severity Error.</summary>
+        public void Error(Exception exception, string message)
+        {
+            if (logLevel <= LogLevel.Error)
+            {
+                innerLogger.Error(exception, message);
+            }
+        }
+    }
+}
diff --git a/test/distrib/cpp/run_distrib_test.sh b/test/distrib/cpp/run_distrib_test.sh
new file mode 100755
index 0000000..bc84b84
--- /dev/null
+++ b/test/distrib/cpp/run_distrib_test.sh
@@ -0,0 +1,52 @@
+#!/bin/bash
+# Copyright 2016, 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.
+
+set -ex
+
+git clone --recursive $EXTERNAL_GIT_ROOT
+cd grpc
+
+cd third_party/protobuf && ./autogen.sh && \
+./configure && make -j4 && make check && make install && ldconfig
+
+cd ../.. && make -j4 && make install
+
+cd examples/cpp/helloworld
+
+make
+
+make clean
+
+cd ../../../examples/cpp/route_guide
+
+make
+
+make clean
+
diff --git a/tools/dockerfile/distribtest/cpp_jessie_x64/Dockerfile b/tools/dockerfile/distribtest/cpp_jessie_x64/Dockerfile
new file mode 100644
index 0000000..c24b1c4
--- /dev/null
+++ b/tools/dockerfile/distribtest/cpp_jessie_x64/Dockerfile
@@ -0,0 +1,45 @@
+# Copyright 2016, 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.
+
+FROM debian:jessie
+
+# Install packages needed for gRPC and protobuf
+RUN apt-get update && apt-get install -y \
+      autoconf \
+      automake \
+      build-essential \
+      curl \
+      git \
+      g++ \
+      libtool \
+      make \
+      pkg-config \
+      unzip && apt-get clean
+
+CMD ["bash"]
diff --git a/tools/run_tests/distribtest_targets.py b/tools/run_tests/distribtest_targets.py
index ae918be..1a7aa0b 100644
--- a/tools/run_tests/distribtest_targets.py
+++ b/tools/run_tests/distribtest_targets.py
@@ -238,9 +238,37 @@
     return self.name
 
 
+class CppDistribTest(object):
+  """Tests Cpp make intall by building examples."""
+
+  def __init__(self, platform, arch, docker_suffix=None):
+    self.name = 'cpp_%s_%s_%s' % (platform, arch, docker_suffix)
+    self.platform = platform
+    self.arch = arch
+    self.docker_suffix = docker_suffix
+    self.labels = ['distribtest', 'cpp', platform, arch, docker_suffix]
+
+  def pre_build_jobspecs(self):
+    return []
+
+  def build_jobspec(self):
+    if self.platform == 'linux':
+      return create_docker_jobspec(self.name,
+                                   'tools/dockerfile/distribtest/cpp_%s_%s' % (
+                                       self.docker_suffix,
+                                       self.arch),
+                                   'test/distrib/cpp/run_distrib_test.sh')
+    else:
+      raise Exception("Not supported yet.")
+
+  def __str__(self):
+    return self.name
+
+
 def targets():
   """Gets list of supported targets"""
-  return [CSharpDistribTest('linux', 'x64', 'wheezy'),
+  return [CppDistribTest('linux', 'x64', 'jessie'),
+          CSharpDistribTest('linux', 'x64', 'wheezy'),
           CSharpDistribTest('linux', 'x64', 'jessie'),
           CSharpDistribTest('linux', 'x86', 'jessie'),
           CSharpDistribTest('linux', 'x64', 'centos7'),