58 lines
1.3 KiB
Go
58 lines
1.3 KiB
Go
// Copyright 2015 CoreOS, Inc.
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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 rafthttp
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import (
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"net/url"
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"sync"
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"github.com/coreos/etcd/pkg/types"
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)
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type urlPicker struct {
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urls types.URLs
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mu sync.Mutex
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picked int
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}
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func newURLPicker(urls types.URLs) *urlPicker {
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return &urlPicker{
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urls: urls,
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}
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}
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func (p *urlPicker) update(urls types.URLs) {
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p.mu.Lock()
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defer p.mu.Unlock()
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p.urls = urls
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p.picked = 0
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}
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func (p *urlPicker) pick() url.URL {
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p.mu.Lock()
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defer p.mu.Unlock()
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return p.urls[p.picked]
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}
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// unreachable notices the picker that the given url is unreachable,
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// and it should use other possible urls.
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func (p *urlPicker) unreachable(u url.URL) {
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p.mu.Lock()
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defer p.mu.Unlock()
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if u == p.urls[p.picked] {
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p.picked = (p.picked + 1) % len(p.urls)
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}
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}
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