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147 lines
3.1 KiB
147 lines
3.1 KiB
// Copyright 2018 fatedier, fatedier@gmail.com
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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 client
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import (
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"context"
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"sync"
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"time"
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"github.com/fatedier/frp/models/config"
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"github.com/fatedier/frp/utils/xlog"
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)
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type VisitorManager struct {
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ctl *Control
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cfgs map[string]config.VisitorConf
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visitors map[string]Visitor
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checkInterval time.Duration
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mu sync.Mutex
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ctx context.Context
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stopCh chan struct{}
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}
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func NewVisitorManager(ctx context.Context, ctl *Control) *VisitorManager {
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return &VisitorManager{
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ctl: ctl,
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cfgs: make(map[string]config.VisitorConf),
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visitors: make(map[string]Visitor),
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checkInterval: 10 * time.Second,
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ctx: ctx,
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stopCh: make(chan struct{}),
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}
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}
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func (vm *VisitorManager) Run() {
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xl := xlog.FromContextSafe(vm.ctx)
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ticker := time.NewTicker(vm.checkInterval)
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defer ticker.Stop()
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for {
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select {
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case <-vm.stopCh:
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xl.Info("gracefully shutdown visitor manager")
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return
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case <-ticker.C:
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vm.mu.Lock()
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for _, cfg := range vm.cfgs {
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name := cfg.GetBaseInfo().ProxyName
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if _, exist := vm.visitors[name]; !exist {
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xl.Info("try to start visitor [%s]", name)
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vm.startVisitor(cfg)
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}
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}
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vm.mu.Unlock()
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}
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}
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}
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// Hold lock before calling this function.
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func (vm *VisitorManager) startVisitor(cfg config.VisitorConf) (err error) {
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xl := xlog.FromContextSafe(vm.ctx)
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name := cfg.GetBaseInfo().ProxyName
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visitor := NewVisitor(vm.ctx, vm.ctl, cfg)
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err = visitor.Run()
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if err != nil {
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xl.Warn("start error: %v", err)
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} else {
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vm.visitors[name] = visitor
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xl.Info("start visitor success")
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}
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return
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}
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func (vm *VisitorManager) Reload(cfgs map[string]config.VisitorConf) {
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xl := xlog.FromContextSafe(vm.ctx)
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vm.mu.Lock()
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defer vm.mu.Unlock()
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delNames := make([]string, 0)
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for name, oldCfg := range vm.cfgs {
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del := false
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cfg, ok := cfgs[name]
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if !ok {
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del = true
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} else {
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if !oldCfg.Compare(cfg) {
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del = true
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}
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}
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if del {
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delNames = append(delNames, name)
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delete(vm.cfgs, name)
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if visitor, ok := vm.visitors[name]; ok {
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visitor.Close()
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}
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delete(vm.visitors, name)
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}
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}
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if len(delNames) > 0 {
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xl.Info("visitor removed: %v", delNames)
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}
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addNames := make([]string, 0)
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for name, cfg := range cfgs {
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if _, ok := vm.cfgs[name]; !ok {
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vm.cfgs[name] = cfg
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addNames = append(addNames, name)
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vm.startVisitor(cfg)
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}
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}
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if len(addNames) > 0 {
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xl.Info("visitor added: %v", addNames)
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}
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return
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}
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func (vm *VisitorManager) Close() {
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vm.mu.Lock()
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defer vm.mu.Unlock()
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for _, v := range vm.visitors {
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v.Close()
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}
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select {
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case <-vm.stopCh:
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default:
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close(vm.stopCh)
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}
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}
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