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39 lines
794 B

package selector
import (
"context"
"git.diulo.com/mogfee/kit/errors"
"google.golang.org/grpc/balancer"
)
var ErrNoAvailable = errors.ServiceUnavailable("no_available_node", "")
type Selector interface {
Rebalancer
Select(ctx context.Context, opts ...SelectOption) (selected WeightedNode, di DoneFunc, err error)
}
type Rebalancer interface {
Apply(nodes []Node)
}
type Builder interface {
Build() Selector
}
type Node interface {
Scheme() string
Address() string
ServerName() string
InitialWeight() *int64
Version() string
Metadata() map[string]string
}
type DoneInfo struct {
Err error
ReplyMD ReplyMD
BytesSent bool
BytesReceived bool
}
type ReplyMD interface {
Get(key string) string
}
type DoneFunc func(ctx context.Context, di balancer.DoneInfo)