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
|
/*
*
* Copyright 2016 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 <limits.h>
#include <string.h>
#include <grpc/load_reporting.h>
#include <grpc/support/alloc.h>
#include <grpc/support/sync.h>
#include "src/core/ext/filters/load_reporting/server_load_reporting_filter.h"
#include "src/core/ext/filters/load_reporting/server_load_reporting_plugin.h"
#include "src/core/lib/channel/channel_stack_builder.h"
#include "src/core/lib/slice/slice_internal.h"
#include "src/core/lib/surface/call.h"
#include "src/core/lib/surface/channel_init.h"
static bool is_load_reporting_enabled(const grpc_channel_args* a) {
return grpc_channel_arg_get_bool(
grpc_channel_args_find(a, GRPC_ARG_ENABLE_LOAD_REPORTING), false);
}
static bool maybe_add_server_load_reporting_filter(
grpc_exec_ctx* exec_ctx, grpc_channel_stack_builder* builder, void* arg) {
const grpc_channel_args* args =
grpc_channel_stack_builder_get_channel_arguments(builder);
const grpc_channel_filter* filter = (const grpc_channel_filter*)arg;
grpc_channel_stack_builder_iterator* it =
grpc_channel_stack_builder_iterator_find(builder, filter->name);
const bool already_has_load_reporting_filter =
!grpc_channel_stack_builder_iterator_is_end(it);
grpc_channel_stack_builder_iterator_destroy(it);
if (is_load_reporting_enabled(args) && !already_has_load_reporting_filter) {
return grpc_channel_stack_builder_prepend_filter(builder, filter, NULL,
NULL);
}
return true;
}
grpc_arg grpc_load_reporting_enable_arg() {
return grpc_channel_arg_integer_create((char*)GRPC_ARG_ENABLE_LOAD_REPORTING,
1);
}
/* Plugin registration */
extern "C" void grpc_server_load_reporting_plugin_init(void) {
grpc_channel_init_register_stage(GRPC_SERVER_CHANNEL, INT_MAX,
maybe_add_server_load_reporting_filter,
(void*)&grpc_server_load_reporting_filter);
}
extern "C" void grpc_server_load_reporting_plugin_shutdown() {}
|
