blob: 3ecb62fc216f8903c15a9bb9c299039f3077e34e (
plain) (
blame)
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
|
// Copyright 2019 The Abseil Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#ifndef Y_ABSL_STATUS_STATUS_PAYLOAD_PRINTER_H_
#define Y_ABSL_STATUS_STATUS_PAYLOAD_PRINTER_H_
#include <util/generic/string.h>
#include "y_absl/strings/cord.h"
#include "y_absl/strings/string_view.h"
#include "y_absl/types/optional.h"
namespace y_absl {
Y_ABSL_NAMESPACE_BEGIN
namespace status_internal {
// By default, `Status::ToString` and `operator<<(Status)` print a payload by
// dumping the type URL and the raw bytes. To help debugging, we provide an
// extension point, which is a global printer function that can be set by users
// to specify how to print payloads. The function takes the type URL and the
// payload as input, and should return a valid human-readable string on success
// or `y_absl::nullopt` on failure (in which case it falls back to the default
// approach of printing the raw bytes).
// NOTE: This is an internal API and the design is subject to change in the
// future in a non-backward-compatible way. Since it's only meant for debugging
// purpose, you should not rely on it in any critical logic.
using StatusPayloadPrinter = y_absl::optional<TString> (*)(y_absl::string_view,
const y_absl::Cord&);
// Sets the global payload printer. Only one printer should be set per process.
// If multiple printers are set, it's undefined which one will be used.
void SetStatusPayloadPrinter(StatusPayloadPrinter);
// Returns the global payload printer if previously set, otherwise `nullptr`.
StatusPayloadPrinter GetStatusPayloadPrinter();
} // namespace status_internal
Y_ABSL_NAMESPACE_END
} // namespace y_absl
#endif // Y_ABSL_STATUS_STATUS_PAYLOAD_PRINTER_H_
|
