resolver_factory.h

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//
// 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_CORE_LIB_RESOLVER_RESOLVER_FACTORY_H
#define GRPC_CORE_LIB_RESOLVER_RESOLVER_FACTORY_H
 
#include <grpc/support/port_platform.h>
 
#include <memory>
#include <string>
 
#include "absl/strings/string_view.h"
#include "absl/strings/strip.h"
 
#include <grpc/impl/codegen/grpc_types.h>
 
#include "src/core/lib/gprpp/orphanable.h"
#include "src/core/lib/iomgr/iomgr_fwd.h"
#include "src/core/lib/resolver/resolver.h"
#include "src/core/lib/uri/uri_parser.h"
 
namespace grpc_core {
 
// TODO(yashkt): Move WorkSerializer to its own Bazel target, depend on that
// target from this one, and remove this forward declaration.
class WorkSerializer;
 
struct ResolverArgs {
  URI uri;
  const grpc_channel_args* args = nullptr;
  grpc_pollset_set* pollset_set = nullptr;
  std::shared_ptr<WorkSerializer> work_serializer;
  std::unique_ptr<Resolver::ResultHandler> result_handler;
};
 
class ResolverFactory {
 public:
  virtual ~ResolverFactory() {}
 
  virtual absl::string_view scheme() const = 0;
 
  virtual bool IsValidUri(const URI& uri) const = 0;
 
  virtual OrphanablePtr<Resolver> CreateResolver(ResolverArgs args) const = 0;
 
  virtual std::string GetDefaultAuthority(const URI& uri) const {
    return std::string(absl::StripPrefix(uri.path(), "/"));
  }
};
 
}  // namespace grpc_core
 
#endif  // GRPC_CORE_LIB_RESOLVER_RESOLVER_FACTORY_H