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//
// Copyright 2022 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_XDS_XDS_CLUSTER_SPECIFIER_PLUGIN_H
#define GRPC_CORE_EXT_XDS_XDS_CLUSTER_SPECIFIER_PLUGIN_H
#include <grpc/support/port_platform.h>
#include <memory>
#include <set>
#include <string>
#include "absl/status/statusor.h"
#include "absl/strings/str_cat.h"
#include "absl/strings/string_view.h"
#include "google/protobuf/any.upb.h"
#include "upb/def.h"
#include <grpc/grpc.h>
#include "src/core/lib/channel/channel_stack.h"
#include "src/core/lib/json/json.h"
namespace grpc_core {
class XdsClusterSpecifierPluginImpl {
public:
virtual ~XdsClusterSpecifierPluginImpl() = default;
// Loads the proto message into the upb symtab.
virtual void PopulateSymtab(upb_DefPool* symtab) const = 0;
// Returns the LB policy config in JSON form.
virtual absl::StatusOr<std::string> GenerateLoadBalancingPolicyConfig(
upb_StringView serialized_plugin_config, upb_Arena* arena,
upb_DefPool* symtab) const = 0;
};
class XdsRouteLookupClusterSpecifierPlugin
: public XdsClusterSpecifierPluginImpl {
void PopulateSymtab(upb_DefPool* symtab) const override;
absl::StatusOr<std::string> GenerateLoadBalancingPolicyConfig(
upb_StringView serialized_plugin_config, upb_Arena* arena,
upb_DefPool* symtab) const override;
};
class XdsClusterSpecifierPluginRegistry {
public:
static void RegisterPlugin(
std::unique_ptr<XdsClusterSpecifierPluginImpl> plugin,
absl::string_view config_proto_type_name);
static void PopulateSymtab(upb_DefPool* symtab);
static const XdsClusterSpecifierPluginImpl* GetPluginForType(
absl::string_view config_proto_type_name);
// Global init and shutdown.
static void Init();
static void Shutdown();
};
} // namespace grpc_core
#endif // GRPC_CORE_EXT_XDS_XDS_CLUSTER_SPECIFIER_PLUGIN_H
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