mirror of
https://gitee.com/rainbond/Rainbond.git
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114 lines
2.5 KiB
Go
114 lines
2.5 KiB
Go
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// RAINBOND, Application Management Platform
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// Copyright (C) 2014-2017 Goodrain Co., Ltd.
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version. For any non-GPL usage of Rainbond,
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// one or multiple Commercial Licenses authorized by Goodrain Co., Ltd.
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// must be obtained first.
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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package event
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import (
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"fmt"
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"os"
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"os/signal"
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"reflect"
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"syscall"
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)
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const (
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EXIT = "exit"
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WAIT = "wait"
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)
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var (
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Events = make(map[string][]func(interface{}), 2)
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)
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func On(name string, fs ...func(interface{})) error {
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evs, ok := Events[name]
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if !ok {
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evs = make([]func(interface{}), 0, len(fs))
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}
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for _, f := range fs {
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fp := reflect.ValueOf(f).Pointer()
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for i := 0; i < len(evs); i++ {
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if reflect.ValueOf(evs[i]).Pointer() == fp {
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return fmt.Errorf("func[%v] already exists in event[%s]", fp, name)
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}
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}
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evs = append(evs, f)
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}
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Events[name] = evs
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return nil
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}
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func Emit(name string, arg interface{}) {
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evs, ok := Events[name]
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if !ok {
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return
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}
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for _, f := range evs {
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f(arg)
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}
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}
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func EmitAll(arg interface{}) {
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for _, fs := range Events {
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for _, f := range fs {
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f(arg)
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}
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}
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return
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}
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func Off(name string, f func(interface{})) error {
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evs, ok := Events[name]
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if !ok || len(evs) == 0 {
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return fmt.Errorf("envet[%s] doesn't have any funcs", name)
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}
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fp := reflect.ValueOf(f).Pointer()
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for i := 0; i < len(evs); i++ {
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if reflect.ValueOf(evs[i]).Pointer() == fp {
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evs = append(evs[:i], evs[i+1:]...)
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Events[name] = evs
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return nil
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}
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}
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return fmt.Errorf("%v func dones't exist in event[%s]", fp, name)
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}
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func OffAll(name string) error {
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Events[name] = nil
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return nil
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}
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// 等待信号
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// 如果信号参数为空，则会等待常见的终止信号
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// SIGINT 2 A 键盘中断（如break键被按下）
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// SIGTERM 15 A 终止信号
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func Wait(sig ...os.Signal) os.Signal {
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c := make(chan os.Signal, 1)
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if len(sig) == 0 {
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signal.Notify(c, syscall.SIGINT, syscall.SIGTERM)
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} else {
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signal.Notify(c, sig...)
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}
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return <-c
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}
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