| /* |
| * |
| * 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_REGISTRY_H |
| #define GRPC_CORE_EXT_FILTERS_CLIENT_CHANNEL_RESOLVER_REGISTRY_H |
| |
| #include <grpc/support/port_platform.h> |
| |
| #include "src/core/ext/filters/client_channel/resolver_factory.h" |
| #include "src/core/lib/gprpp/inlined_vector.h" |
| #include "src/core/lib/gprpp/memory.h" |
| #include "src/core/lib/gprpp/orphanable.h" |
| #include "src/core/lib/iomgr/pollset_set.h" |
| |
| namespace grpc_core { |
| |
| class ResolverRegistry { |
| public: |
| /// Methods used to create and populate the ResolverRegistry. |
| /// NOT THREAD SAFE -- to be used only during global gRPC |
| /// initialization and shutdown. |
| class Builder { |
| public: |
| /// Global initialization and shutdown hooks. |
| static void InitRegistry(); |
| static void ShutdownRegistry(); |
| |
| /// Sets the default URI prefix to \a default_prefix. |
| /// Calls InitRegistry() if it has not already been called. |
| static void SetDefaultPrefix(const char* default_prefix); |
| |
| /// Registers a resolver factory. The factory will be used to create a |
| /// resolver for any URI whose scheme matches that of the factory. |
| /// Calls InitRegistry() if it has not already been called. |
| static void RegisterResolverFactory(UniquePtr<ResolverFactory> factory); |
| }; |
| |
| /// Creates a resolver given \a target. |
| /// First tries to parse \a target as a URI. If this succeeds, tries |
| /// to locate a registered resolver factory based on the URI scheme. |
| /// If parsing fails or there is no factory for the URI's scheme, |
| /// prepends default_prefix to target and tries again. |
| /// If a resolver factory is found, uses it to instantiate a resolver and |
| /// returns it; otherwise, returns nullptr. |
| /// \a args, \a pollset_set, and \a combiner are passed to the factory's |
| /// \a CreateResolver() method. |
| /// \a args are the channel args to be included in resolver results. |
| /// \a pollset_set is used to drive I/O in the name resolution process. |
| /// \a combiner is the combiner under which all resolver calls will be run. |
| static OrphanablePtr<Resolver> CreateResolver(const char* target, |
| const grpc_channel_args* args, |
| grpc_pollset_set* pollset_set, |
| grpc_combiner* combiner); |
| |
| /// Returns the default authority to pass from a client for \a target. |
| static UniquePtr<char> GetDefaultAuthority(const char* target); |
| |
| /// Returns \a target with the default prefix prepended, if needed. |
| static UniquePtr<char> AddDefaultPrefixIfNeeded(const char* target); |
| |
| /// Returns the resolver factory for \a scheme. |
| /// Caller does NOT own the return value. |
| static ResolverFactory* LookupResolverFactory(const char* scheme); |
| }; |
| |
| } // namespace grpc_core |
| |
| #endif /* GRPC_CORE_EXT_FILTERS_CLIENT_CHANNEL_RESOLVER_REGISTRY_H */ |