go.etcd.io/etcd@v3.3.27+incompatible/etcdctl/ctlv3/command/printer_json.go (about)

     1  // Copyright 2016 The etcd Authors
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package command
    16  
    17  import (
    18  	"encoding/json"
    19  	"fmt"
    20  	"os"
    21  )
    22  
    23  type jsonPrinter struct{ printer }
    24  
    25  func newJSONPrinter() printer {
    26  	return &jsonPrinter{
    27  		&printerRPC{newPrinterUnsupported("json"), printJSON},
    28  	}
    29  }
    30  
    31  func (p *jsonPrinter) EndpointHealth(r []epHealth) { printJSON(r) }
    32  func (p *jsonPrinter) EndpointStatus(r []epStatus) { printJSON(r) }
    33  func (p *jsonPrinter) EndpointHashKV(r []epHashKV) { printJSON(r) }
    34  func (p *jsonPrinter) DBStatus(r dbstatus)         { printJSON(r) }
    35  
    36  func printJSON(v interface{}) {
    37  	b, err := json.Marshal(v)
    38  	if err != nil {
    39  		fmt.Fprintf(os.Stderr, "%v\n", err)
    40  		return
    41  	}
    42  	fmt.Println(string(b))
    43  }