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workmanager.go
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workmanager.go
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package gowork
import (
"errors"
"fmt"
"sync"
)
type WorkManager struct {
goworks map[string]*gowork
mutex sync.Mutex
}
const (
worker_not_exist = "goworker: %s not exist."
)
func NewWorkManager() *WorkManager {
return &WorkManager{
goworks: make(map[string]*gowork),
}
}
func (w *WorkManager) register(name string, gtnum int, f WorkFunction) error {
w.mutex.Lock()
defer w.mutex.Unlock()
if _, ok := w.goworks[name]; ok {
return errors.New(fmt.Sprintf(worker_not_exist, name))
}
work := &gowork{
routinenum: gtnum,
goworker: f,
exceptionHandler: exception{
handler: defaultExceptionHandler,
res: nil,
},
request: make(chan interface{}),
wg: new(sync.WaitGroup),
timeout: 30,
}
w.goworks[name] = work
return nil
}
func (w *WorkManager) unregister(name string) error {
w.mutex.Lock()
defer w.mutex.Unlock()
if _, ok := w.goworks[name]; !ok {
return errors.New(fmt.Sprintf(worker_not_exist, name))
}
delete(w.goworks, name)
return nil
}
/*******************************************************************************
Function: create a new goroutine
Parameters: name [IN] the worker name
gtnum [IN] the goroutine number
f [IN] worker function
res [OUT] store the worker result
********************************************************************************/
func (w *WorkManager) NewGoroutine(name string, gtnum int, f WorkFunction, res interface{}) error {
err := w.register(name, gtnum, f)
if err != nil {
return err
}
w.goworks[name].workerpool(res)
return nil
}
/*******************************************************************************
Function: add a request param to the specified worker
Parameters: name [IN] the worker name
req [IN] the request param
********************************************************************************/
func (w *WorkManager) AddRequest(name string, req interface{}) error {
w.mutex.Lock()
if _, ok := w.goworks[name]; !ok {
w.mutex.Unlock()
return errors.New(fmt.Sprintf(worker_not_exist, name))
}
w.mutex.Unlock()
w.goworks[name].addrequest(req)
return nil
}
/*******************************************************************************
Function: close the specified worker and unregister it
Parameters: name [IN] the worker name
********************************************************************************/
func (w *WorkManager) Done(name string) error {
w.mutex.Lock()
if _, ok := w.goworks[name]; !ok {
w.mutex.Unlock()
return errors.New(fmt.Sprintf(worker_not_exist, name))
}
w.mutex.Unlock()
w.goworks[name].close()
w.goworks[name].waitgroupWait()
return w.unregister(name)
}
/*******************************************************************************
Function: set a goroutine timeout, default 30s
Parameters: name [IN] the worker name
timeout [IN] a goroutine timeout
********************************************************************************/
func (w *WorkManager) SetTimeout(name string, timeout int) error {
w.mutex.Lock()
defer w.mutex.Unlock()
if _, ok := w.goworks[name]; !ok {
return errors.New(fmt.Sprintf(worker_not_exist, name))
}
w.goworks[name].timeout = timeout
return nil
}
/*******************************************************************************
Function: a func call when the exception happen
Parameters: name [IN] the worker name
handler [IN] a function deal the exception
res [IN/OUT] store the exception handler result
********************************************************************************/
func (w *WorkManager) SetExecptionHandler(name string, handler WorkFunction, res interface{}) error {
w.mutex.Lock()
defer w.mutex.Unlock()
if _, ok := w.goworks[name]; !ok {
return errors.New(fmt.Sprintf(worker_not_exist, name))
}
w.goworks[name].exceptionHandler.handler = handler
w.goworks[name].exceptionHandler.res = res
return nil
}