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main.go
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main.go
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/*
* 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.
*/
package main
import (
"fmt"
"github.com/qshuai/rocketmq-client-go/v2/rlog"
"os"
)
type command interface {
usage()
run(args []string)
}
var (
cmds = map[string]command{}
)
func registerCommand(name string, cmd command) {
if cmd == nil {
panic("empty command")
}
_, ok := cmds[name]
if ok {
panic(fmt.Sprintf("%s command existed", name))
}
cmds[name] = cmd
}
func usage() {
rlog.Info("Command", map[string]interface{}{
"name": os.Args[0],
})
for _, cmd := range cmds {
cmd.usage()
}
}
// go run *.go [command name] [command args]
func main() {
if len(os.Args) < 2 {
rlog.Error("Lack Command Name", nil)
usage()
return
}
name := os.Args[1]
cmd, ok := cmds[name]
if !ok {
rlog.Error("Command Isn't Supported", map[string]interface{}{
"command": name,
})
usage()
return
}
cmd.run(os.Args[2:])
}