/
run_unix.go
65 lines (58 loc) · 2.47 KB
/
run_unix.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
// Licensed to the Apache Software Foundation (ASF) under one or more
// contributor license agreements. See the NOTICE file distributed with
// this work for additional information regarding copyright ownership.
// The ASF licenses this file to You under the Apache License, Version 2.0
// (the "License"); you may not use this file except in compliance with
// the License. You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// Match build constraints of imported package golang.org/x/sys/unix.
//go:build aix || darwin || dragonfly || freebsd || linux || netbsd || openbsd || solaris || zos
// +build aix darwin dragonfly freebsd linux netbsd openbsd solaris zos
package jars
import (
"fmt"
"os/exec"
"time"
)
// getTimeoutRunner is an OS-specific branch for determining what behavior to use for Run. This
// Unix specific version handles timeout.
func getTimeoutRunner() runCallback {
_, err := exec.LookPath("timeout")
if err != nil {
// Wrap run with Unix-specific error handling for missing timeout command.
return func(dur time.Duration, jar string, args ...string) (Process, error) {
// Currently, we hard-fail here if a duration is provided but timeout is unsupported. If
// we ever decide to soft-fail instead, this is the code to change.
if dur != 0 {
return nil, fmt.Errorf("cannot run jar: duration parameter provided but 'timeout' command not installed: %w", err)
}
return run(dur, jar, args...)
}
}
// Path for a supported timeout, just use the default run function.
return run
}
// run starts up a jar, and wraps it in "timeout" only if a duration is provided. Processes are
// returned wrapped as Unix processes that provide graceful shutdown for unix specifically.
func run(dur time.Duration, jar string, args ...string) (Process, error) {
var cmdArr []string
if dur != 0 {
durStr := fmt.Sprintf("%.2fm", dur.Minutes())
cmdArr = append(cmdArr, "timeout", durStr)
}
cmdArr = append(cmdArr, "java", "-jar", jar)
cmdArr = append(cmdArr, args...)
cmd := exec.Command(cmdArr[0], cmdArr[1:]...)
err := cmd.Start()
if err != nil {
return nil, err
}
return &UnixProcess{proc: cmd.Process}, nil
}