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cmdutils.go
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cmdutils.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 cmdutils
import (
"encoding/json"
"errors"
"fmt"
"io"
"os"
"strings"
"time"
"github.com/streamnative/pulsarctl/pkg/pulsar"
"github.com/kris-nova/logger"
"github.com/spf13/cobra"
)
const IncompatibleFlags = "cannot be used at the same time"
// NewVerbCmd defines a standard resource command
func NewResourceCmd(use, short, long string, aliases ...string) *cobra.Command {
return &cobra.Command{
Use: use,
Short: short,
Long: long,
Aliases: aliases,
Run: func(cmd *cobra.Command, _ []string) {
if err := cmd.Help(); err != nil {
logger.Debug("ignoring error %q", err.Error())
}
},
}
}
var CheckNameArgError = defaultNameArgsError
var defaultNameArgsError = func(err error) {
os.Exit(1)
}
// GetNameArg tests to ensure there is only 1 name argument
func GetNameArg(args []string, errMsg string) (string, error) {
if len(args) > 1 || len(args) == 0 {
logger.Critical(errMsg)
err := errors.New(errMsg)
CheckNameArgError(err)
return "", err
}
if len(args) == 1 {
return strings.TrimSpace(args[0]), nil
}
return "", nil
}
func GetNameArgs(args []string, check func(args []string) error) ([]string, error) {
err := check(args)
if err != nil {
logger.Critical(err.Error())
CheckNameArgError(err)
//for testing
return nil, err
}
return args, nil
}
func NewPulsarClient() pulsar.Client {
return PulsarCtlConfig.Client(pulsar.V2)
}
func NewPulsarClientWithAPIVersion(version pulsar.APIVersion) pulsar.Client {
return PulsarCtlConfig.Client(version)
}
func PrintJSON(w io.Writer, obj interface{}) {
b, err := json.MarshalIndent(obj, "", " ")
if err != nil {
_, _ = fmt.Fprintf(w, "unexpected response type: %v\n", err)
return
}
_, _ = fmt.Fprintln(w, string(b))
}
func PrintError(w io.Writer, err error) {
msg := err.Error()
if pulsar.IsAdminError(err) {
ae, _ := err.(pulsar.Error)
msg = ae.Reason
}
fmt.Fprintln(w, "error:", msg)
}
func RunFuncWithTimeout(task func([]string, interface{}) bool, condition bool, timeout time.Duration,
args []string, obj interface{}) error {
ticker := time.NewTicker(1 * time.Second)
defer ticker.Stop()
result := !condition
timer := time.After(timeout)
for condition != result {
select {
case <-timer:
return errors.New("task timeout")
case <-ticker.C:
result = task(args, obj)
}
}
return nil
}