1 /* 2 * 3 * Copyright 2015 gRPC authors. 4 * 5 * Licensed under the Apache License, Version 2.0 (the "License"); 6 * you may not use this file except in compliance with the License. 7 * You may obtain a copy of the License at 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0 10 * 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * See the License for the specific language governing permissions and 15 * limitations under the License. 16 * 17 */ 18 19 #ifndef GRPC_CORE_EXT_FILTERS_CLIENT_CHANNEL_CLIENT_CHANNEL_H 20 #define GRPC_CORE_EXT_FILTERS_CLIENT_CHANNEL_CLIENT_CHANNEL_H 21 22 #include <grpc/support/port_platform.h> 23 24 #include "src/core/ext/filters/client_channel/client_channel_channelz.h" 25 #include "src/core/ext/filters/client_channel/client_channel_factory.h" 26 #include "src/core/ext/filters/client_channel/resolver.h" 27 #include "src/core/lib/channel/channel_stack.h" 28 29 extern grpc_core::TraceFlag grpc_client_channel_trace; 30 31 // Channel arg key for server URI string. 32 #define GRPC_ARG_SERVER_URI "grpc.server_uri" 33 34 /* A client channel is a channel that begins disconnected, and can connect 35 to some endpoint on demand. If that endpoint disconnects, it will be 36 connected to again later. 37 38 Calls on a disconnected client channel are queued until a connection is 39 established. */ 40 41 extern const grpc_channel_filter grpc_client_channel_filter; 42 43 void grpc_client_channel_populate_child_refs( 44 grpc_channel_element* elem, grpc_core::ChildRefsList* child_subchannels, 45 grpc_core::ChildRefsList* child_channels); 46 47 grpc_connectivity_state grpc_client_channel_check_connectivity_state( 48 grpc_channel_element* elem, int try_to_connect); 49 50 int grpc_client_channel_num_external_connectivity_watchers( 51 grpc_channel_element* elem); 52 53 void grpc_client_channel_watch_connectivity_state( 54 grpc_channel_element* elem, grpc_polling_entity pollent, 55 grpc_connectivity_state* state, grpc_closure* on_complete, 56 grpc_closure* watcher_timer_init); 57 58 /* Debug helper: pull the subchannel call from a call stack element */ 59 grpc_subchannel_call* grpc_client_channel_get_subchannel_call( 60 grpc_call_element* elem); 61 62 #endif /* GRPC_CORE_EXT_FILTERS_CLIENT_CHANNEL_CLIENT_CHANNEL_H */ 63
