forked from ochinchina/supervisord
/
process_manager.go
212 lines (180 loc) · 4.69 KB
/
process_manager.go
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package process
import (
"fmt"
"strings"
"sync"
"github.com/ochinchina/supervisord/config"
log "github.com/sirupsen/logrus"
)
type ProcessManager struct {
procs map[string]*Process
eventListeners map[string]*Process
lock sync.Mutex
}
func NewProcessManager() *ProcessManager {
return &ProcessManager{procs: make(map[string]*Process),
eventListeners: make(map[string]*Process),
}
}
func (pm *ProcessManager) CreateProcess(supervisor_id string, config *config.ConfigEntry) *Process {
pm.lock.Lock()
defer pm.lock.Unlock()
if config.IsProgram() {
return pm.createProgram(supervisor_id, config)
} else if config.IsEventListener() {
return pm.createEventListener(supervisor_id, config)
} else {
return nil
}
}
func (pm *ProcessManager) StartAutoStartPrograms() {
pm.ForEachProcess(func(proc *Process) {
if proc.isAutoStart() {
proc.Start(false)
}
})
}
func (pm *ProcessManager) createProgram(supervisor_id string, config *config.ConfigEntry) *Process {
procName := config.GetProgramName()
proc, ok := pm.procs[procName]
if !ok {
proc = NewProcess(supervisor_id, config)
pm.procs[procName] = proc
}
log.Info("create process:", procName)
return proc
}
func (pm *ProcessManager) createEventListener(supervisor_id string, config *config.ConfigEntry) *Process {
eventListenerName := config.GetEventListenerName()
evtListener, ok := pm.eventListeners[eventListenerName]
if !ok {
evtListener = NewProcess(supervisor_id, config)
pm.eventListeners[eventListenerName] = evtListener
}
log.Info("create event listener:", eventListenerName)
return evtListener
}
func (pm *ProcessManager) Add(name string, proc *Process) {
pm.lock.Lock()
defer pm.lock.Unlock()
pm.procs[name] = proc
log.Info("add process:", name)
}
// remove the process from the manager
//
// Arguments:
// name - the name of program
//
// Return the process or nil
func (pm *ProcessManager) Remove(name string) *Process {
pm.lock.Lock()
defer pm.lock.Unlock()
proc, _ := pm.procs[name]
delete(pm.procs, name)
log.Info("remove process:", name)
return proc
}
// return process if found or nil if not found
func (pm *ProcessManager) Find(name string) *Process {
procs := pm.FindMatch(name)
if len(procs) == 1 {
if procs[0].GetName() == name || name == fmt.Sprintf("%s:%s", procs[0].GetGroup(), procs[0].GetName()) {
return procs[0]
}
}
return nil
}
func (pm *ProcessManager) FindMatch(name string) []*Process {
result := make([]*Process, 0)
if pos := strings.Index(name, ":"); pos != -1 {
groupName := name[0:pos]
programName := name[pos+1:]
pm.ForEachProcess(func(p *Process) {
if p.GetGroup() == groupName {
if programName == "*" || programName == p.GetName() {
result = append(result, p)
}
}
})
} else {
pm.lock.Lock()
defer pm.lock.Unlock()
proc, ok := pm.procs[name]
if ok {
result = append(result, proc)
}
}
if len(result) <= 0 {
log.Info("fail to find process:", name)
}
return result
}
// clear all the processes
func (pm *ProcessManager) Clear() {
pm.lock.Lock()
defer pm.lock.Unlock()
pm.procs = make(map[string]*Process)
}
// process each process in sync mode
func (pm *ProcessManager) ForEachProcess(procFunc func(p *Process)) {
pm.lock.Lock()
defer pm.lock.Unlock()
procs := pm.getAllProcess()
for _, proc := range procs {
procFunc(proc)
}
}
// handle each process in async mode
// Args:
// - procFunc, the function to handle the process
// - done, signal the process is completed
// Returns: number of total processes
func (pm *ProcessManager) AsyncForEachProcess(procFunc func(p *Process), done chan *Process) int {
pm.lock.Lock()
defer pm.lock.Unlock()
procs := pm.getAllProcess()
for _, proc := range procs {
go forOneProcess(proc, procFunc, done)
}
return len(procs)
}
func forOneProcess(proc *Process, action func(p *Process), done chan *Process) {
action(proc)
done <- proc
}
func (pm *ProcessManager) getAllProcess() []*Process {
tmpProcs := make([]*Process, 0)
for _, proc := range pm.procs {
tmpProcs = append(tmpProcs, proc)
}
return sortProcess(tmpProcs)
}
func (pm *ProcessManager) StopAllProcesses() {
var wg sync.WaitGroup
pm.ForEachProcess(func(proc *Process) {
wg.Add(1)
go func(wg *sync.WaitGroup) {
defer wg.Done()
proc.Stop(true)
}(&wg)
})
wg.Wait()
}
func sortProcess(procs []*Process) []*Process {
prog_configs := make([]*config.ConfigEntry, 0)
for _, proc := range procs {
if proc.config.IsProgram() {
prog_configs = append(prog_configs, proc.config)
}
}
result := make([]*Process, 0)
p := config.NewProcessSorter()
for _, config := range p.SortProgram(prog_configs) {
for _, proc := range procs {
if proc.config == config {
result = append(result, proc)
}
}
}
return result
}