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selector.go
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selector.go
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// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
// Original source: github.com/micro/go-micro/v3/selector/selector.go
// Package selector is for node selection and load balancing
package selector
import (
"errors"
)
var (
// ErrNoneAvailable is returned by select when no routes were provided to select from
ErrNoneAvailable = errors.New("none available")
)
// Selector selects a route from a pool
type Selector interface {
// Select a route from the pool using the strategy
Select([]string, ...SelectOption) (Next, error)
// Record the error returned from a route to inform future selection
Record(string, error) error
// Reset the selector
Reset() error
// String returns the name of the selector
String() string
}
// Next returns the next node
type Next func() string