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
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
|
//
//
// Copyright 2015 gRPC 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
//
// http://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.
//
//
#include <grpc/support/port_platform.h>
#include "src/core/lib/surface/lame_client.h"
#include <memory>
#include <utility>
#include "absl/status/statusor.h"
#include <grpc/grpc.h>
#include <grpc/impl/connectivity_state.h>
#include <grpc/status.h>
#include <grpc/support/log.h>
#include "src/core/lib/channel/channel_args.h"
#include "src/core/lib/channel/channel_args_preconditioning.h"
#include "src/core/lib/channel/channel_stack.h"
#include "src/core/lib/channel/promise_based_filter.h"
#include "src/core/lib/config/core_configuration.h"
#include "src/core/lib/debug/trace.h"
#include "src/core/lib/gpr/useful.h"
#include "src/core/lib/gprpp/debug_location.h"
#include "src/core/lib/gprpp/ref_counted_ptr.h"
#include "src/core/lib/gprpp/sync.h"
#include "src/core/lib/iomgr/exec_ctx.h"
#include "src/core/lib/promise/pipe.h"
#include "src/core/lib/promise/promise.h"
#include "src/core/lib/surface/api_trace.h"
#include "src/core/lib/surface/channel.h"
#include "src/core/lib/surface/channel_stack_type.h"
#include "src/core/lib/transport/connectivity_state.h"
#include "src/core/lib/transport/metadata_batch.h"
#include "src/core/lib/transport/transport.h"
// Avoid some IWYU confusion:
// IWYU pragma: no_include "src/core/lib/gprpp/orphanable.h"
#define GRPC_ARG_LAME_FILTER_ERROR "grpc.lame_filter_error"
namespace grpc_core {
const grpc_channel_filter LameClientFilter::kFilter =
MakePromiseBasedFilter<LameClientFilter, FilterEndpoint::kClient,
kFilterIsLast>("lame-client");
absl::StatusOr<LameClientFilter> LameClientFilter::Create(
const ChannelArgs& args, ChannelFilter::Args) {
return LameClientFilter(
*args.GetPointer<absl::Status>(GRPC_ARG_LAME_FILTER_ERROR));
}
LameClientFilter::LameClientFilter(absl::Status error)
: error_(std::move(error)), state_(std::make_unique<State>()) {}
LameClientFilter::State::State()
: state_tracker("lame_client", GRPC_CHANNEL_SHUTDOWN) {}
ArenaPromise<ServerMetadataHandle> LameClientFilter::MakeCallPromise(
CallArgs args, NextPromiseFactory) {
// TODO(ctiller): remove if check once promise_based_filter is removed (Close
// is still needed)
if (args.server_to_client_messages != nullptr) {
args.server_to_client_messages->CloseWithError();
}
if (args.client_to_server_messages != nullptr) {
args.client_to_server_messages->CloseWithError();
}
if (args.server_initial_metadata != nullptr) {
args.server_initial_metadata->CloseWithError();
}
args.client_initial_metadata_outstanding.Complete(true);
return Immediate(ServerMetadataFromStatus(error_));
}
bool LameClientFilter::GetChannelInfo(const grpc_channel_info*) { return true; }
bool LameClientFilter::StartTransportOp(grpc_transport_op* op) {
{
MutexLock lock(&state_->mu);
if (op->start_connectivity_watch != nullptr) {
state_->state_tracker.AddWatcher(op->start_connectivity_watch_state,
std::move(op->start_connectivity_watch));
}
if (op->stop_connectivity_watch != nullptr) {
state_->state_tracker.RemoveWatcher(op->stop_connectivity_watch);
}
}
if (op->send_ping.on_initiate != nullptr) {
ExecCtx::Run(DEBUG_LOCATION, op->send_ping.on_initiate,
GRPC_ERROR_CREATE("lame client channel"));
}
if (op->send_ping.on_ack != nullptr) {
ExecCtx::Run(DEBUG_LOCATION, op->send_ping.on_ack,
GRPC_ERROR_CREATE("lame client channel"));
}
if (op->on_consumed != nullptr) {
ExecCtx::Run(DEBUG_LOCATION, op->on_consumed, absl::OkStatus());
}
return true;
}
namespace {
// Channel arg vtable for a grpc_error_handle.
void* ErrorCopy(void* p) {
return new absl::Status(*static_cast<absl::Status*>(p));
}
void ErrorDestroy(void* p) { delete static_cast<absl::Status*>(p); }
int ErrorCompare(void* p, void* q) { return QsortCompare(p, q); }
const grpc_arg_pointer_vtable kLameFilterErrorArgVtable = {
ErrorCopy, ErrorDestroy, ErrorCompare};
} // namespace
grpc_arg MakeLameClientErrorArg(grpc_error_handle* error) {
return grpc_channel_arg_pointer_create(
const_cast<char*>(GRPC_ARG_LAME_FILTER_ERROR), error,
&kLameFilterErrorArgVtable);
}
} // namespace grpc_core
grpc_channel* grpc_lame_client_channel_create(const char* target,
grpc_status_code error_code,
const char* error_message) {
grpc_core::ExecCtx exec_ctx;
GRPC_API_TRACE(
"grpc_lame_client_channel_create(target=%s, error_code=%d, "
"error_message=%s)",
3, (target, (int)error_code, error_message));
if (error_code == GRPC_STATUS_OK) error_code = GRPC_STATUS_UNKNOWN;
grpc_core::ChannelArgs args =
grpc_core::CoreConfiguration::Get()
.channel_args_preconditioning()
.PreconditionChannelArgs(nullptr)
.Set(GRPC_ARG_LAME_FILTER_ERROR,
grpc_core::ChannelArgs::Pointer(
new absl::Status(static_cast<absl::StatusCode>(error_code),
error_message),
&grpc_core::kLameFilterErrorArgVtable));
auto channel = grpc_core::Channel::Create(target, std::move(args),
GRPC_CLIENT_LAME_CHANNEL, nullptr);
GPR_ASSERT(channel.ok());
return channel->release()->c_ptr();
}
|
