1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
|
#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.Threading.Tasks;
namespace Grpc.Core.Utils
{
/// <summary>
/// Extension methods that simplify work with gRPC streaming calls.
/// </summary>
public static class AsyncStreamExtensions
{
/// <summary>
/// Reads the entire stream and executes an async action for each element.
/// </summary>
public static async Task ForEachAsync<T>(this IAsyncStreamReader<T> streamReader, Func<T, Task> asyncAction)
where T : class
{
while (await streamReader.MoveNext().ConfigureAwait(false))
{
await asyncAction(streamReader.Current).ConfigureAwait(false);
}
}
/// <summary>
/// Reads the entire stream and creates a list containing all the elements read.
/// </summary>
public static async Task<List<T>> ToListAsync<T>(this IAsyncStreamReader<T> streamReader)
where T : class
{
var result = new List<T>();
while (await streamReader.MoveNext().ConfigureAwait(false))
{
result.Add(streamReader.Current);
}
return result;
}
/// <summary>
/// Writes all elements from given enumerable to the stream.
/// Completes the stream afterwards unless close = false.
/// </summary>
public static async Task WriteAllAsync<T>(this IClientStreamWriter<T> streamWriter, IEnumerable<T> elements, bool complete = true)
where T : class
{
foreach (var element in elements)
{
await streamWriter.WriteAsync(element).ConfigureAwait(false);
}
if (complete)
{
await streamWriter.CompleteAsync().ConfigureAwait(false);
}
}
/// <summary>
/// Writes all elements from given enumerable to the stream.
/// </summary>
public static async Task WriteAllAsync<T>(this IServerStreamWriter<T> streamWriter, IEnumerable<T> elements)
where T : class
{
foreach (var element in elements)
{
await streamWriter.WriteAsync(element).ConfigureAwait(false);
}
}
}
}
|
