chromium/third_party/grpc/src/src/core/lib/resolver/resolver.h

//
// 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_LIB_RESOLVER_RESOLVER_H
#define GRPC_SRC_CORE_LIB_RESOLVER_RESOLVER_H

#include <grpc/support/port_platform.h>

#include <functional>
#include <string>

#include "absl/status/status.h"
#include "absl/status/statusor.h"

#include "src/core/lib/channel/channel_args.h"
#include "src/core/lib/debug/trace.h"
#include "src/core/lib/gprpp/orphanable.h"
#include "src/core/lib/gprpp/ref_counted_ptr.h"
#include "src/core/lib/resolver/server_address.h"
#include "src/core/lib/service_config/service_config.h"

extern grpc_core::DebugOnlyTraceFlag grpc_trace_resolver_refcount;

// Name associated with individual address, if available.
#define GRPC_ARG_ADDRESS_NAME …

namespace grpc_core {

/// Interface for name resolution.
///
/// This interface is designed to support both push-based and pull-based
/// mechanisms.  A push-based mechanism is one where the resolver will
/// subscribe to updates for a given name, and the name service will
/// proactively send new data to the resolver whenever the data associated
/// with the name changes.  A pull-based mechanism is one where the resolver
/// needs to query the name service again to get updated information (e.g.,
/// DNS).
///
/// Note: All methods with a "Locked" suffix must be called from the
/// work_serializer passed to the constructor.
class Resolver : public InternallyRefCounted<Resolver> { … };

}  // namespace grpc_core

#endif  // GRPC_SRC_CORE_LIB_RESOLVER_RESOLVER_H