github.com/m3db/m3@v1.5.0/src/msg/producer/buffer/strategy.go (about)

     1  // Copyright (c) 2018 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 buffer
    22  
    23  import "fmt"
    24  
    25  var (
    26  	validStrategies = []OnFullStrategy{
    27  		ReturnError,
    28  		DropOldest,
    29  	}
    30  )
    31  
    32  // UnmarshalYAML unmarshals OnFullStrategy from yaml.
    33  func (t *OnFullStrategy) UnmarshalYAML(unmarshal func(interface{}) error) error {
    34  	var str string
    35  	if err := unmarshal(&str); err != nil {
    36  		return err
    37  	}
    38  	var validStrings []string
    39  	for _, validStrategy := range validStrategies {
    40  		validString := string(validStrategy)
    41  		if validString == str {
    42  			*t = validStrategy
    43  			return nil
    44  		}
    45  		validStrings = append(validStrings, validString)
    46  	}
    47  
    48  	return fmt.Errorf("invalid strategy %s, valid strategies are: %v", str, validStrings)
    49  }