shengxiang
9 years ago
parent
98dcff54bb
commit
0b1c5e6b7a
@ -0,0 +1,142 @@
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package main
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import (
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"errors"
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"io"
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"os"
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"os/exec"
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"path/filepath"
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"sync"
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"github.com/codeskyblue/kproc"
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"github.com/qiniu/log"
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)
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func GoFunc(f func() error) chan error {
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ch := make(chan error)
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go func() {
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ch <- f()
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}()
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return ch
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}
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const (
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ST_PENDING = "pending"
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ST_RUNNING = "running"
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ST_STOPPED = "stopped"
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ST_FATAL = "fatal"
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)
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type Program struct {
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*kproc.Process `json:"-"`
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Status string `json:"state"`
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Sig chan os.Signal `json:"-"`
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Info *ProgramInfo `json:"info"`
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}
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func NewProgram(cmd *exec.Cmd, info *ProgramInfo) *Program {
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return &Program{
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Process: kproc.ProcCommand(cmd),
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Status: ST_PENDING,
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Sig: make(chan os.Signal),
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Info: info,
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}
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}
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func (p *Program) createLog() (*os.File, error) {
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logDir := os.ExpandEnv("$HOME/.gosuv/logs")
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os.MkdirAll(logDir, 0755) // just do it, err ignore it
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logFile := filepath.Join(logDir, p.Info.Name+".output.log")
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return os.Create(logFile)
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}
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func (p *Program) Run() error {
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if err := p.Start(); err != nil {
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p.Status = ST_FATAL
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return err
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}
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return p.Wait()
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}
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func (p *Program) Start() error {
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logFd, err := p.createLog()
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if err != nil {
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return err
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}
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p.Cmd.Stdout = logFd
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p.Cmd.Stderr = logFd
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return p.Cmd.Start()
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}
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// wait func finish, also accept signal
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func (p *Program) Wait() (err error) {
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log.Println("Wait program to finish")
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p.Status = ST_RUNNING
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defer func() {
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if out, ok := p.Cmd.Stdout.(io.Closer); ok {
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out.Close()
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}
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if err != nil {
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log.Warnf("program finish: %v", err)
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p.Status = ST_FATAL
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} else {
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p.Status = ST_STOPPED
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}
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}()
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ch := GoFunc(p.Cmd.Wait)
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for {
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select {
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case err = <-ch:
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return err
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case sig := <-p.Sig:
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p.Terminate(sig)
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}
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}
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}
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type ProgramInfo struct {
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Name string `json:"name"`
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Command []string `json:"command"`
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Dir string `json:"dir"`
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Environ []string `json:"environ"`
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}
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var programTable *ProgramTable
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func init() {
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programTable = &ProgramTable{
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table: make(map[string]*Program, 10),
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ch: make(chan string),
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}
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}
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type ProgramTable struct {
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table map[string]*Program
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ch chan string
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mu sync.Mutex
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}
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var (
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ErrProgramDuplicate = errors.New("program duplicate")
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)
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func (pt *ProgramTable) AddProgram(p *Program) error {
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pt.mu.Lock()
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defer pt.mu.Unlock()
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name := p.Info.Name
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if _, exists := pt.table[name]; exists {
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return ErrProgramDuplicate
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}
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pt.table[name] = p
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return nil
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}
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func (pt *ProgramTable) Programs() []*Program {
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pt.mu.Lock()
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defer pt.mu.Unlock()
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ps := make([]*Program, 0, len(pt.table))
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for _, p := range pt.table {
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ps = append(ps, p)
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}
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return ps
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}
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