зеркало из https://github.com/github/vitess-gh.git
87 строки
2.1 KiB
Go
87 строки
2.1 KiB
Go
/*
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Copyright 2019 The Vitess Authors.
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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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http://www.apache.org/licenses/LICENSE-2.0
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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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*/
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package servenv
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import (
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"fmt"
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"net"
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"net/http"
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"net/url"
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"os"
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"os/signal"
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"syscall"
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"time"
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"vitess.io/vitess/go/event"
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"vitess.io/vitess/go/vt/log"
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)
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var (
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onCloseHooks event.Hooks
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// ExitChan waits for a signal that tells the process to terminate
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ExitChan chan os.Signal
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)
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// Run starts listening for RPC and HTTP requests,
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// and blocks until it the process gets a signal.
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func Run(port int) {
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populateListeningURL(int32(port))
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createGRPCServer()
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onRunHooks.Fire()
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serveGRPC()
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serveSocketFile()
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l, err := net.Listen("tcp", fmt.Sprintf(":%v", port))
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if err != nil {
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log.Exit(err)
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}
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go http.Serve(l, nil)
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ExitChan = make(chan os.Signal, 1)
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signal.Notify(ExitChan, syscall.SIGTERM, syscall.SIGINT)
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// Wait for signal
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<-ExitChan
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l.Close()
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startTime := time.Now()
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log.Infof("Entering lameduck mode for at least %v", *lameduckPeriod)
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log.Infof("Firing asynchronous OnTerm hooks")
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go onTermHooks.Fire()
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fireOnTermSyncHooks(*onTermTimeout)
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if remain := *lameduckPeriod - time.Since(startTime); remain > 0 {
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log.Infof("Sleeping an extra %v after OnTermSync to finish lameduck period", remain)
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time.Sleep(remain)
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}
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log.Info("Shutting down gracefully")
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fireOnCloseHooks(*onCloseTimeout)
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}
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// Close runs any registered exit hooks in parallel.
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func Close() {
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onCloseHooks.Fire()
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ListeningURL = url.URL{}
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}
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// OnClose registers f to be run at the end of the app lifecycle.
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// This happens after the lameduck period just before the program exits.
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// All hooks are run in parallel.
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func OnClose(f func()) {
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onCloseHooks.Add(f)
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}
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