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get_command.go 1.83 KB
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// Copyright 2015 CoreOS, Inc.
//
// Licensed 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 command
import (
"errors"
"fmt"
"os"
"github.com/coreos/etcd/Godeps/_workspace/src/github.com/codegangsta/cli"
"github.com/coreos/etcd/Godeps/_workspace/src/github.com/coreos/go-etcd/etcd"
)
// NewGetCommand returns the CLI command for "get".
func NewGetCommand() cli.Command {
return cli.Command{
Name: "get",
Usage: "retrieve the value of a key",
Flags: []cli.Flag{
cli.BoolFlag{Name: "sort", Usage: "returns result in sorted order"},
},
Action: func(c *cli.Context) {
handleGet(c, getCommandFunc)
},
}
}
// handleGet handles a request that intends to do get-like operations.
func handleGet(c *cli.Context, fn handlerFunc) {
handlePrint(c, fn, printGet)
}
// printGet writes error message when getting the value of a directory.
func printGet(resp *etcd.Response, format string) {
if resp.Node.Dir {
fmt.Fprintln(os.Stderr, fmt.Sprintf("%s: is a directory", resp.Node.Key))
os.Exit(1)
}
printKey(resp, format)
}
// getCommandFunc executes the "get" command.
func getCommandFunc(c *cli.Context, client *etcd.Client) (*etcd.Response, error) {
if len(c.Args()) == 0 {
return nil, errors.New("Key required")
}
key := c.Args()[0]
sorted := c.Bool("sort")
// Retrieve the value from the server.
return client.Get(key, sorted, false)
}
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shanmenghao
etcd
etcd
v2.0.5

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