设置 Engine 组策略

• 随机访问负载策略

• 权重随机访问负载策略

    _ "github.com/lib/pq"
    "xorm.io/xorm"
)
var eg *xorm.EngineGroup
func main() {
  conns := []string{
        "postgres://postgres:[email protected]:5432/test?sslmode=disable;",
        "postgres://postgres:[email protected]:5432/test1?sslmode=disable;",
    }
  var err error
  //此时设置的test1数据库和test2数据库的随机访问权重为2和3
    eg, err = xorm.NewEngineGroup("postgres", conns, xorm.WeightRandomPolicy([]int{2, 3}))
}

• 轮询访问负载策略

• 权重轮询访问负载策略

import (
    _ "github.com/lib/pq"
    "xorm.io/xorm"
)
var eg *xorm.EngineGroup
func main() {
        "postgres://postgres:[email protected]:5432/test?sslmode=disable;",
        "postgres://postgres:[email protected]:5432/test1?sslmode=disable;",
        "postgres://postgres:[email protected]:5432/test2?sslmode=disable",
    }
  var err error
  //此时设置的test1数据库和test2数据库的轮询访问权重为2和3
    eg, err = xorm.NewEngineGroup("postgres", conns, xorm.WeightRoundRobinPolicy([]int{2, 3}))
}

• 最小连接数访问负载策略

• 自定义负载策略

type GroupPolicy interface {
}