89 lines
1.9 KiB
Go
89 lines
1.9 KiB
Go
package service
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import (
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"bufio"
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"context"
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"fmt"
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"log"
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"os"
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"os/exec"
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"os/signal"
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"syscall"
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"github.com/spf13/viper"
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)
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func RunService() {
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args := viper.GetStringSlice("java.args")
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args = append(args, "-jar")
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args = append(args, viper.GetString("server.jar"))
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args = append(args, "--nogui")
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log.Println("Java: ", viper.GetString("java.path"), " Args: ", args)
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cmd := exec.Command(viper.GetString("java.path"), args...)
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// Open all three pipes
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stdin, err := cmd.StdinPipe()
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if err != nil {
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log.Fatal(err)
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}
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stdout, err := cmd.StdoutPipe()
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if err != nil {
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log.Fatal(err)
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}
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stderr, err := cmd.StderrPipe()
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if err != nil {
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log.Fatal(err)
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}
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// Start process
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if err := cmd.Start(); err != nil {
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log.Fatal(err)
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}
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// forward stdout and stderr
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go func() {
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sc := bufio.NewScanner(stdout)
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for sc.Scan() {
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fmt.Fprintln(os.Stdout, sc.Text())
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}
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}()
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go func() {
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sc := bufio.NewScanner(stderr)
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for sc.Scan() {
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fmt.Fprintln(os.Stderr, sc.Text())
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}
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}()
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// Separate Channel for handling SIGHUP
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hupCh := make(chan os.Signal, 1)
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signal.Notify(hupCh, syscall.SIGHUP)
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ctx, stop := signal.NotifyContext(context.Background(), syscall.SIGINT, syscall.SIGTERM)
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defer stop()
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<- ctx.Done()
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for {
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select {
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case <-hupCh:
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log.Println("Sending reload signal to Server Process")
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if _, err := stdin.Write([]byte("reload\n")); err != nil {
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log.Printf("write error: %v", err)
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}
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case <-ctx.Done():
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log.Println("Sending stop signal to Server Process")
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if _, err := stdin.Write([]byte("stop\n")); err != nil {
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log.Printf("write error: %v", err)
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}
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if err := cmd.Wait(); err != nil {
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log.Printf("child exit: %v", err)
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}
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log.Println("Shutdown completed")
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return
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}
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}
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}
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