github.com/m3db/m3@v1.5.0/src/cmd/services/m3comparator/main/series_load_handler.go (about)

     1  // Copyright (c) 2020 Uber Technologies, Inc.
     2  //
     3  // Permission is hereby granted, free of charge, to any person obtaining a copy
     4  // of this software and associated documentation files (the "Software"), to deal
     5  // in the Software without restriction, including without limitation the rights
     6  // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
     7  // copies of the Software, and to permit persons to whom the Software is
     8  // furnished to do so, subject to the following conditions:
     9  //
    10  // The above copyright notice and this permission notice shall be included in
    11  // all copies or substantial portions of the Software.
    12  //
    13  // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
    14  // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
    15  // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
    16  // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
    17  // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
    18  // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
    19  // THE SOFTWARE.
    20  
    21  package main
    22  
    23  import (
    24  	"net/http"
    25  	"sync"
    26  
    27  	"github.com/m3db/m3/src/cmd/services/m3comparator/main/parser"
    28  	"github.com/m3db/m3/src/dbnode/encoding"
    29  	xhttp "github.com/m3db/m3/src/x/net/http"
    30  
    31  	"go.uber.org/zap"
    32  )
    33  
    34  type seriesLoadHandler interface {
    35  	getSeriesIterators(string) (encoding.SeriesIterators, error)
    36  }
    37  
    38  type httpSeriesLoadHandler struct {
    39  	sync.RWMutex
    40  	reader   parser.SeriesReader
    41  	iterOpts parser.Options
    42  }
    43  
    44  var (
    45  	_ http.Handler      = (*httpSeriesLoadHandler)(nil)
    46  	_ seriesLoadHandler = (*httpSeriesLoadHandler)(nil)
    47  )
    48  
    49  // newHTTPSeriesLoadHandler builds a handler that can load series
    50  // to the comparator via an http endpoint.
    51  func newHTTPSeriesLoadHandler(iterOpts parser.Options) *httpSeriesLoadHandler {
    52  	return &httpSeriesLoadHandler{
    53  		iterOpts: iterOpts,
    54  		reader:   parser.NewSeriesReader(iterOpts),
    55  	}
    56  }
    57  
    58  func (l *httpSeriesLoadHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
    59  	logger := l.iterOpts.InstrumentOptions.Logger()
    60  	err := l.serveHTTP(r)
    61  	if err != nil {
    62  		logger.Error("unable to fetch data", zap.Error(err))
    63  		xhttp.WriteError(w, err)
    64  		return
    65  	}
    66  
    67  	w.WriteHeader(http.StatusOK)
    68  }
    69  
    70  func (l *httpSeriesLoadHandler) getSeriesIterators(
    71  	name string) (encoding.SeriesIterators, error) {
    72  	return l.reader.SeriesIterators(name)
    73  }
    74  
    75  func (l *httpSeriesLoadHandler) serveHTTP(r *http.Request) error {
    76  	if r.Method == http.MethodDelete {
    77  		l.reader.Clear()
    78  		return nil
    79  	}
    80  
    81  	body := r.Body
    82  	defer body.Close()
    83  	return l.reader.Load(body)
    84  }