| /* |
| * |
| * 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, nullptr, |
| nullptr); |
| } |
| 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() {} |