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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_LB_POLICY_REGISTRY_H
#define GRPC_CORE_EXT_FILTERS_CLIENT_CHANNEL_LB_POLICY_REGISTRY_H
#include <grpc/support/port_platform.h>
#include "src/core/ext/filters/client_channel/lb_policy_factory.h"
#include "src/core/lib/gprpp/memory.h"
#include "src/core/lib/gprpp/orphanable.h"
namespace grpc_core {
class LoadBalancingPolicyRegistry {
public:
/// Methods used to create and populate the LoadBalancingPolicyRegistry.
/// 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();
/// Registers an LB policy factory. The factory will be used to create an
/// LB policy whose name matches that of the factory.
static void RegisterLoadBalancingPolicyFactory(
std::unique_ptr<LoadBalancingPolicyFactory> factory);
};
/// Creates an LB policy of the type specified by \a name.
static OrphanablePtr<LoadBalancingPolicy> CreateLoadBalancingPolicy(
const char* name, LoadBalancingPolicy::Args args);
/// Returns true if the LB policy factory specified by \a name exists in this
/// registry. If the load balancing policy requires a config to be specified
/// then sets \a requires_config to true.
static bool LoadBalancingPolicyExists(const char* name,
bool* requires_config);
/// Returns a parsed object of the load balancing policy to be used from a
/// LoadBalancingConfig array \a json.
static RefCountedPtr<LoadBalancingPolicy::Config> ParseLoadBalancingConfig(
const Json& json, grpc_error_handle* error);
};
} // namespace grpc_core
#endif /* GRPC_CORE_EXT_FILTERS_CLIENT_CHANNEL_LB_POLICY_REGISTRY_H */
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