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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_EXT_FILTERS_CLIENT_CHANNEL_RESOLVER_FACTORY_H
#define GRPC_CORE_EXT_FILTERS_CLIENT_CHANNEL_RESOLVER_FACTORY_H
#include <grpc/support/port_platform.h>
#include <grpc/support/string_util.h>
#include "src/core/ext/filters/client_channel/resolver.h"
#include "src/core/lib/gprpp/abstract.h"
#include "src/core/lib/gprpp/memory.h"
#include "src/core/lib/gprpp/orphanable.h"
#include "src/core/lib/iomgr/pollset_set.h"
#include "src/core/lib/uri/uri_parser.h"
namespace grpc_core {
struct ResolverArgs {
/// The parsed URI to resolve.
grpc_uri* uri = nullptr;
/// Channel args to be included in resolver results.
const grpc_channel_args* args = nullptr;
/// Used to drive I/O in the name resolution process.
grpc_pollset_set* pollset_set = nullptr;
/// The combiner under which all resolver calls will be run.
grpc_combiner* combiner = nullptr;
};
class ResolverFactory {
public:
/// Returns a new resolver instance.
virtual OrphanablePtr<Resolver> CreateResolver(const ResolverArgs& args) const
GRPC_ABSTRACT;
/// Returns a string representing the default authority to use for this
/// scheme.
virtual UniquePtr<char> GetDefaultAuthority(grpc_uri* uri) const {
const char* path = uri->path;
if (path[0] == '/') ++path;
return UniquePtr<char>(gpr_strdup(path));
}
/// Returns the URI scheme that this factory implements.
/// Caller does NOT take ownership of result.
virtual const char* scheme() const GRPC_ABSTRACT;
virtual ~ResolverFactory() {}
GRPC_ABSTRACT_BASE_CLASS
};
} // namespace grpc_core
#endif /* GRPC_CORE_EXT_FILTERS_CLIENT_CHANNEL_RESOLVER_FACTORY_H */
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