google.golang.org/grpc@v1.62.1/xds/internal/balancer/clusterimpl/config.go (about)

     1  /*
     2   *
     3   * Copyright 2020 gRPC authors.
     4   *
     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
     8   *
     9   *     http://www.apache.org/licenses/LICENSE-2.0
    10   *
    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.
    16   *
    17   */
    18  
    19  package clusterimpl
    20  
    21  import (
    22  	"encoding/json"
    23  
    24  	internalserviceconfig "google.golang.org/grpc/internal/serviceconfig"
    25  	"google.golang.org/grpc/serviceconfig"
    26  	"google.golang.org/grpc/xds/internal/xdsclient/bootstrap"
    27  )
    28  
    29  // DropConfig contains the category, and drop ratio.
    30  type DropConfig struct {
    31  	Category           string
    32  	RequestsPerMillion uint32
    33  }
    34  
    35  // LBConfig is the balancer config for cluster_impl balancer.
    36  type LBConfig struct {
    37  	serviceconfig.LoadBalancingConfig `json:"-"`
    38  
    39  	Cluster        string `json:"cluster,omitempty"`
    40  	EDSServiceName string `json:"edsServiceName,omitempty"`
    41  	// LoadReportingServer is the LRS server to send load reports to. If not
    42  	// present, load reporting will be disabled.
    43  	LoadReportingServer   *bootstrap.ServerConfig               `json:"lrsLoadReportingServer,omitempty"`
    44  	MaxConcurrentRequests *uint32                               `json:"maxConcurrentRequests,omitempty"`
    45  	DropCategories        []DropConfig                          `json:"dropCategories,omitempty"`
    46  	ChildPolicy           *internalserviceconfig.BalancerConfig `json:"childPolicy,omitempty"`
    47  }
    48  
    49  func parseConfig(c json.RawMessage) (*LBConfig, error) {
    50  	var cfg LBConfig
    51  	if err := json.Unmarshal(c, &cfg); err != nil {
    52  		return nil, err
    53  	}
    54  	return &cfg, nil
    55  }
    56  
    57  func equalDropCategories(a, b []DropConfig) bool {
    58  	if len(a) != len(b) {
    59  		return false
    60  	}
    61  	for i := range a {
    62  		if a[i] != b[i] {
    63  			return false
    64  		}
    65  	}
    66  	return true
    67  }