subchannel_stream_client.h | Explore in Territory

//
// Copyright 2018 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_SUBCHANNEL_STREAM_CLIENT_H
#define GRPC_SRC_CORE_EXT_FILTERS_CLIENT_CHANNEL_SUBCHANNEL_STREAM_CLIENT_H

#include <grpc/support/port_platform.h>

#include <atomic>
#include <memory>

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

#include <grpc/event_engine/event_engine.h>
#include <grpc/event_engine/memory_allocator.h>
#include <grpc/slice.h>
#include <grpc/status.h>

#include "src/core/ext/filters/client_channel/subchannel.h"
#include "src/core/lib/backoff/backoff.h"
#include "src/core/lib/channel/context.h"
#include "src/core/lib/gprpp/orphanable.h"
#include "src/core/lib/gprpp/ref_counted_ptr.h"
#include "src/core/lib/gprpp/sync.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/resource_quota/arena.h"
#include "src/core/lib/resource_quota/memory_quota.h"
#include "src/core/lib/slice/slice.h"
#include "src/core/lib/slice/slice_buffer.h"
#include "src/core/lib/transport/metadata_batch.h"
#include "src/core/lib/transport/transport.h"

namespace grpc_core {

// Represents a streaming call on a subchannel that should be maintained
// open at all times.
// If the call fails with UNIMPLEMENTED, no further attempts are made.
// If the call fails with any other status (including OK), we retry the
// call with appropriate backoff.
// The backoff state is reset when we receive a message on a stream.
//
// Currently, this assumes server-side streaming, but it could be extended
// to support full bidi streaming if there is a need in the future.
class SubchannelStreamClient
    : public InternallyRefCounted<SubchannelStreamClient> { … };

}  // namespace grpc_core

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