github.com/m3db/m3@v1.5.0/src/x/instrument/sanitize.go (about)

     1  // Copyright (c) 2017 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 instrument
    22  
    23  import (
    24  	"fmt"
    25  	"strings"
    26  
    27  	"github.com/uber-go/tally"
    28  	"github.com/uber-go/tally/m3"
    29  	"github.com/uber-go/tally/prometheus"
    30  )
    31  
    32  // MetricSanitizationType is a type of sanitizer to use for metrics.
    33  type MetricSanitizationType int
    34  
    35  const (
    36  	// NoMetricSanitization performs no metric sanitization.
    37  	NoMetricSanitization MetricSanitizationType = iota
    38  
    39  	// M3MetricSanitization performs M3 metric sanitization.
    40  	M3MetricSanitization
    41  
    42  	// PrometheusMetricSanitization performs Prometheus metric sanitization.
    43  	PrometheusMetricSanitization
    44  
    45  	// defaultMetricSanitization is the default metric sanitization.
    46  	defaultMetricSanitization = NoMetricSanitization
    47  )
    48  
    49  var (
    50  	validMetricSanitizationTypes = []MetricSanitizationType{
    51  		NoMetricSanitization,
    52  		M3MetricSanitization,
    53  		PrometheusMetricSanitization,
    54  	}
    55  )
    56  
    57  func (t MetricSanitizationType) String() string {
    58  	switch t {
    59  	case NoMetricSanitization:
    60  		return "none"
    61  	case M3MetricSanitization:
    62  		return "m3"
    63  	case PrometheusMetricSanitization:
    64  		return "prometheus"
    65  	}
    66  	return "unknown"
    67  }
    68  
    69  // UnmarshalYAML unmarshals a MetricSanitizationType into a valid type from string.
    70  func (t *MetricSanitizationType) UnmarshalYAML(unmarshal func(interface{}) error) error {
    71  	var str string
    72  	if err := unmarshal(&str); err != nil {
    73  		return err
    74  	}
    75  	if str == "" {
    76  		*t = defaultMetricSanitization
    77  		return nil
    78  	}
    79  	strs := make([]string, 0, len(validMetricSanitizationTypes))
    80  	for _, valid := range validMetricSanitizationTypes {
    81  		if str == valid.String() {
    82  			*t = valid
    83  			return nil
    84  		}
    85  		strs = append(strs, "'"+valid.String()+"'")
    86  	}
    87  	return fmt.Errorf("invalid MetricSanitizationType '%s' valid types are: %s",
    88  		str, strings.Join(strs, ", "))
    89  }
    90  
    91  // NewOptions returns a new set of sanitization options for the sanitization type.
    92  func (t *MetricSanitizationType) NewOptions() *tally.SanitizeOptions {
    93  	switch *t {
    94  	case NoMetricSanitization:
    95  		return nil
    96  	case M3MetricSanitization:
    97  		return &m3.DefaultSanitizerOpts
    98  	case PrometheusMetricSanitization:
    99  		return &prometheus.DefaultSanitizerOpts
   100  	}
   101  	return nil
   102  }