mirror of
https://github.com/etcd-io/etcd.git
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50 lines
1.4 KiB
Go
50 lines
1.4 KiB
Go
// Copyright 2018 The etcd Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package picker
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import "fmt"
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// Policy defines balancer picker policy.
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type Policy uint8
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const (
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// TODO: custom picker is not supported yet.
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// custom defines custom balancer picker.
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custom Policy = iota
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// RoundrobinBalanced balance loads over multiple endpoints
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// and implements failover in roundrobin fashion.
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RoundrobinBalanced Policy = iota
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// TODO: only send loads to pinned address "RoundrobinFailover"
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// just like how 3.3 client works
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//
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// TODO: priotize leader
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// TODO: health-check
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// TODO: weighted roundrobin
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// TODO: power of two random choice
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)
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func (p Policy) String() string {
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switch p {
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case custom:
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panic("'custom' picker policy is not supported yet")
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case RoundrobinBalanced:
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return "etcd-client-roundrobin-balanced"
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default:
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panic(fmt.Errorf("invalid balancer picker policy (%d)", p))
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}
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}
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