3 * Copyright 2015 gRPC authors.
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
9 * http://www.apache.org/licenses/LICENSE-2.0
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
19 #ifndef GRPC_CORE_EXT_FILTERS_CLIENT_CHANNEL_LB_POLICY_FACTORY_H
20 #define GRPC_CORE_EXT_FILTERS_CLIENT_CHANNEL_LB_POLICY_FACTORY_H
22 #include <grpc/support/port_platform.h>
24 #include "src/core/ext/filters/client_channel/lb_policy.h"
25 #include "src/core/lib/gprpp/abstract.h"
26 #include "src/core/lib/gprpp/orphanable.h"
30 class LoadBalancingPolicyFactory {
32 /// Returns a new LB policy instance.
33 virtual OrphanablePtr<LoadBalancingPolicy> CreateLoadBalancingPolicy(
34 LoadBalancingPolicy::Args) const GRPC_ABSTRACT;
36 /// Returns the LB policy name that this factory provides.
37 /// Caller does NOT take ownership of result.
38 virtual const char* name() const GRPC_ABSTRACT;
40 virtual RefCountedPtr<ParsedLoadBalancingConfig> ParseLoadBalancingConfig(
41 const grpc_json* json, grpc_error** error) const GRPC_ABSTRACT;
43 virtual ~LoadBalancingPolicyFactory() {}
45 GRPC_ABSTRACT_BASE_CLASS;
48 } // namespace grpc_core
50 #endif /* GRPC_CORE_EXT_FILTERS_CLIENT_CHANNEL_LB_POLICY_FACTORY_H */