Package base defines a balancer base that can be used to build balancers with different picking algorithms.

    The base balancer creates a new SubConn for each resolved address. The provided picker will only be notified about READY SubConns.

    This package is the base of round_robin balancer, its purpose is to be used to build round_robin like balancers with complex picking algorithms. Balancers with more complicated logic should try to implement a balancer builder from scratch.

    All APIs in this package are experimental.



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    func NewBalancerBuilder

    func NewBalancerBuilder(name string, pb PickerBuilder) balancer.Builder

      NewBalancerBuilder returns a balancer builder. The balancers built by this builder will use the picker builder to build pickers.

      func NewErrPicker

      func NewErrPicker(err error) balancer.Picker

        NewErrPicker returns a picker that always returns err on Pick().


        type PickerBuilder

        type PickerBuilder interface {
        	// Build takes a slice of ready SubConns, and returns a picker that will be
        	// used by gRPC to pick a SubConn.
        	Build(readySCs map[resolver.Address]balancer.SubConn) balancer.Picker

          PickerBuilder creates balancer.Picker.