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#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.Runtime.InteropServices;
using System.Threading;
using System.Threading.Tasks;
using Grpc.Core.Internal;
using Grpc.Core.Utils;
namespace Grpc.Core
{
/// <summary>
/// Channel option specified when creating a channel.
/// Corresponds to grpc_channel_args from grpc/grpc.h.
/// </summary>
public sealed class ChannelOption
{
/// <summary>
/// Type of <c>ChannelOption</c>.
/// </summary>
public enum OptionType
{
/// <summary>
/// Channel option with integer value.
/// </summary>
Integer,
/// <summary>
/// Channel option with string value.
/// </summary>
String
}
private readonly OptionType type;
private readonly string name;
private readonly int intValue;
private readonly string stringValue;
/// <summary>
/// Creates a channel option with a string value.
/// </summary>
/// <param name="name">Name.</param>
/// <param name="stringValue">String value.</param>
public ChannelOption(string name, string stringValue)
{
this.type = OptionType.String;
this.name = Preconditions.CheckNotNull(name, "name");
this.stringValue = Preconditions.CheckNotNull(stringValue, "stringValue");
}
/// <summary>
/// Creates a channel option with an integer value.
/// </summary>
/// <param name="name">Name.</param>
/// <param name="intValue">Integer value.</param>
public ChannelOption(string name, int intValue)
{
this.type = OptionType.Integer;
this.name = Preconditions.CheckNotNull(name, "name");
this.intValue = intValue;
}
/// <summary>
/// Gets the type of the <c>ChannelOption</c>.
/// </summary>
public OptionType Type
{
get
{
return type;
}
}
/// <summary>
/// Gets the name of the <c>ChannelOption</c>.
/// </summary>
public string Name
{
get
{
return name;
}
}
/// <summary>
/// Gets the integer value the <c>ChannelOption</c>.
/// </summary>
public int IntValue
{
get
{
Preconditions.CheckState(type == OptionType.Integer);
return intValue;
}
}
/// <summary>
/// Gets the string value the <c>ChannelOption</c>.
/// </summary>
public string StringValue
{
get
{
Preconditions.CheckState(type == OptionType.String);
return stringValue;
}
}
}
/// <summary>
/// Defines names of supported channel options.
/// </summary>
public static class ChannelOptions
{
/// <summary>Override SSL target check. Only to be used for testing.</summary>
public const string SslTargetNameOverride = "grpc.ssl_target_name_override";
/// <summary>Enable census for tracing and stats collection</summary>
public const string Census = "grpc.census";
/// <summary>Maximum number of concurrent incoming streams to allow on a http2 connection</summary>
public const string MaxConcurrentStreams = "grpc.max_concurrent_streams";
/// <summary>Maximum message length that the channel can receive</summary>
public const string MaxMessageLength = "grpc.max_message_length";
/// <summary>Initial sequence number for http2 transports</summary>
public const string Http2InitialSequenceNumber = "grpc.http2.initial_sequence_number";
/// <summary>Default authority for calls.</summary>
public const string DefaultAuthority = "grpc.default_authority";
/// <summary>Primary user agent: goes at the start of the user-agent metadata</summary>
public const string PrimaryUserAgentString = "grpc.primary_user_agent";
/// <summary>Secondary user agent: goes at the end of the user-agent metadata</summary>
public const string SecondaryUserAgentString = "grpc.secondary_user_agent";
/// <summary>
/// Creates native object for a collection of channel options.
/// </summary>
/// <returns>The native channel arguments.</returns>
internal static ChannelArgsSafeHandle CreateChannelArgs(List<ChannelOption> options)
{
if (options == null || options.Count == 0)
{
return ChannelArgsSafeHandle.CreateNull();
}
ChannelArgsSafeHandle nativeArgs = null;
try
{
nativeArgs = ChannelArgsSafeHandle.Create(options.Count);
for (int i = 0; i < options.Count; i++)
{
var option = options[i];
if (option.Type == ChannelOption.OptionType.Integer)
{
nativeArgs.SetInteger(i, option.Name, option.IntValue);
}
else if (option.Type == ChannelOption.OptionType.String)
{
nativeArgs.SetString(i, option.Name, option.StringValue);
}
else
{
throw new InvalidOperationException("Unknown option type");
}
}
return nativeArgs;
}
catch (Exception)
{
if (nativeArgs != null)
{
nativeArgs.Dispose();
}
throw;
}
}
}
}
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