gitlab.com/aquachain/aquachain@v1.17.16-rc3.0.20221018032414-e3ddf1e1c055/common/metrics/json.go (about)

     1  // Copyright 2018 The aquachain Authors
     2  // This file is part of the aquachain library.
     3  //
     4  // The aquachain library is free software: you can redistribute it and/or modify
     5  // it under the terms of the GNU Lesser General Public License as published by
     6  // the Free Software Foundation, either version 3 of the License, or
     7  // (at your option) any later version.
     8  //
     9  // The aquachain library is distributed in the hope that it will be useful,
    10  // but WITHOUT ANY WARRANTY; without even the implied warranty of
    11  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    12  // GNU Lesser General Public License for more details.
    13  //
    14  // You should have received a copy of the GNU Lesser General Public License
    15  // along with the aquachain library. If not, see <http://www.gnu.org/licenses/>.
    16  
    17  package metrics
    18  
    19  import (
    20  	"encoding/json"
    21  	"io"
    22  	"time"
    23  )
    24  
    25  // MarshalJSON returns a byte slice containing a JSON representation of all
    26  // the metrics in the Registry.
    27  func (r *StandardRegistry) MarshalJSON() ([]byte, error) {
    28  	return json.Marshal(r.GetAll())
    29  }
    30  
    31  // WriteJSON writes metrics from the given registry  periodically to the
    32  // specified io.Writer as JSON.
    33  func WriteJSON(r Registry, d time.Duration, w io.Writer) {
    34  	for range time.Tick(d) {
    35  		WriteJSONOnce(r, w)
    36  	}
    37  }
    38  
    39  // WriteJSONOnce writes metrics from the given registry to the specified
    40  // io.Writer as JSON.
    41  func WriteJSONOnce(r Registry, w io.Writer) {
    42  	json.NewEncoder(w).Encode(r)
    43  }
    44  
    45  func (p *PrefixedRegistry) MarshalJSON() ([]byte, error) {
    46  	return json.Marshal(p.GetAll())
    47  }