client_channel.h | Explore in Territory

//
// 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.
//

#ifndef GRPC_SRC_CORE_EXT_FILTERS_CLIENT_CHANNEL_CLIENT_CHANNEL_H
#define GRPC_SRC_CORE_EXT_FILTERS_CLIENT_CHANNEL_CLIENT_CHANNEL_H

#include <grpc/support/port_platform.h>

#include <stddef.h>

#include <atomic>
#include <map>
#include <memory>
#include <string>

#include "absl/base/thread_annotations.h"
#include "absl/container/flat_hash_set.h"
#include "absl/status/status.h"
#include "absl/strings/string_view.h"
#include "absl/types/optional.h"

#include <grpc/grpc.h>
#include <grpc/impl/connectivity_state.h>

#include "src/core/ext/filters/client_channel/client_channel_factory.h"
#include "src/core/ext/filters/client_channel/config_selector.h"
#include "src/core/ext/filters/client_channel/dynamic_filters.h"
#include "src/core/ext/filters/client_channel/lb_policy/backend_metric_data.h"
#include "src/core/ext/filters/client_channel/subchannel.h"
#include "src/core/ext/filters/client_channel/subchannel_pool_interface.h"
#include "src/core/lib/channel/call_tracer.h"
#include "src/core/lib/channel/channel_args.h"
#include "src/core/lib/channel/channel_fwd.h"
#include "src/core/lib/channel/channel_stack.h"
#include "src/core/lib/channel/channelz.h"
#include "src/core/lib/channel/context.h"
#include "src/core/lib/gpr/time_precise.h"
#include "src/core/lib/gprpp/orphanable.h"
#include "src/core/lib/gprpp/ref_counted.h"
#include "src/core/lib/gprpp/ref_counted_ptr.h"
#include "src/core/lib/gprpp/sync.h"
#include "src/core/lib/gprpp/time.h"
#include "src/core/lib/gprpp/work_serializer.h"
#include "src/core/lib/iomgr/call_combiner.h"
#include "src/core/lib/iomgr/closure.h"
#include "src/core/lib/iomgr/error.h"
#include "src/core/lib/iomgr/iomgr_fwd.h"
#include "src/core/lib/iomgr/polling_entity.h"
#include "src/core/lib/load_balancing/lb_policy.h"
#include "src/core/lib/resolver/resolver.h"
#include "src/core/lib/resource_quota/arena.h"
#include "src/core/lib/service_config/service_config.h"
#include "src/core/lib/slice/slice_buffer.h"
#include "src/core/lib/surface/channel.h"
#include "src/core/lib/transport/connectivity_state.h"
#include "src/core/lib/transport/metadata_batch.h"
#include "src/core/lib/transport/transport.h"

//
// Client channel filter
//

// A client channel is a channel that begins disconnected, and can connect
// to some endpoint on demand. If that endpoint disconnects, it will be
// connected to again later.
//
// Calls on a disconnected client channel are queued until a connection is
// established.

// Channel arg key for server URI string.
#define GRPC_ARG_SERVER_URI …

// Channel arg containing a pointer to the ClientChannel object.
#define GRPC_ARG_CLIENT_CHANNEL …

// Max number of batches that can be pending on a call at any given
// time.  This includes one batch for each of the following ops:
//   recv_initial_metadata
//   send_initial_metadata
//   recv_message
//   send_message
//   recv_trailing_metadata
//   send_trailing_metadata
#define MAX_PENDING_BATCHES …

namespace grpc_core {

class ClientChannel { … };

//
// ClientChannel::LoadBalancedCall
//

// TODO(roth): As part of simplifying cancellation in the filter stack,
// this should no longer need to be ref-counted.
class ClientChannel::LoadBalancedCall
    : public InternallyRefCounted<LoadBalancedCall, kUnrefCallDtor> { … };

class ClientChannel::FilterBasedLoadBalancedCall
    : public ClientChannel::LoadBalancedCall { … };

}  // namespace grpc_core

#endif  // GRPC_SRC_CORE_EXT_FILTERS_CLIENT_CHANNEL_CLIENT_CHANNEL_H
chromium/third_party/grpc/src/src/core/ext/filters/client_channel/client_channel.h
