mirror of https://github.com/grpc/grpc.git
Juanli Shen
6 years ago
parent
b1d4583a51
commit
a802b14be6
19 changed files with 154 additions and 28 deletions
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/*
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* |
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* Copyright 2019 gRPC authors. |
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* |
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* Licensed under the Apache License, Version 2.0 (the "License"); |
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* you may not use this file except in compliance with the License. |
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* You may obtain a copy of the License at |
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* |
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* http://www.apache.org/licenses/LICENSE-2.0
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* |
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* Unless required by applicable law or agreed to in writing, software |
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* distributed under the License is distributed on an "AS IS" BASIS, |
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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* See the License for the specific language governing permissions and |
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* limitations under the License. |
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* |
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*/ |
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#include <grpc/support/port_platform.h> |
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#include "src/core/ext/filters/client_channel/resolver_registry.h" |
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namespace grpc_core { |
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namespace { |
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class XdsResolver : public Resolver { |
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public: |
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explicit XdsResolver(ResolverArgs args) |
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: Resolver(args.combiner, std::move(args.result_handler)), |
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args_(grpc_channel_args_copy(args.args)) {} |
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~XdsResolver() override { grpc_channel_args_destroy(args_); } |
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void StartLocked() override; |
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void ShutdownLocked() override{}; |
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private: |
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const grpc_channel_args* args_; |
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}; |
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void XdsResolver::StartLocked() { |
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static const char* service_config = |
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"{\n" |
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" \"loadBalancingConfig\":[\n" |
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" { \"xds_experimental\":{} }\n" |
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" ]\n" |
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"}"; |
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Result result; |
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result.args = args_; |
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args_ = nullptr; |
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grpc_error* error = GRPC_ERROR_NONE; |
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result.service_config = ServiceConfig::Create(service_config, &error); |
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result_handler()->ReturnResult(std::move(result)); |
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} |
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//
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// Factory
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//
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class XdsResolverFactory : public ResolverFactory { |
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public: |
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bool IsValidUri(const grpc_uri* uri) const override { |
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if (GPR_UNLIKELY(0 != strcmp(uri->authority, ""))) { |
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gpr_log(GPR_ERROR, "URI authority not supported"); |
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return false; |
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} |
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return true; |
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} |
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OrphanablePtr<Resolver> CreateResolver(ResolverArgs args) const override { |
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if (!IsValidUri(args.uri)) return nullptr; |
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return OrphanablePtr<Resolver>(New<XdsResolver>(std::move(args))); |
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} |
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const char* scheme() const override { return "xds-experimental"; } |
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}; |
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} // namespace
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} // namespace grpc_core
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void grpc_resolver_xds_init() { |
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grpc_core::ResolverRegistry::Builder::RegisterResolverFactory( |
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grpc_core::UniquePtr<grpc_core::ResolverFactory>( |
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grpc_core::New<grpc_core::XdsResolverFactory>())); |
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} |
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void grpc_resolver_xds_shutdown() {} |
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