github.com/m3db/m3@v1.5.0/src/metrics/rules/view/changes/mapping.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
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     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 changes
    22  
    23  import "github.com/m3db/m3/src/metrics/rules/view"
    24  
    25  // MappingRuleChange is a mapping rule diff.
    26  type MappingRuleChange struct {
    27  	Op       Op                `json:"op"`
    28  	RuleID   *string           `json:"ruleID,omitempty"`
    29  	RuleData *view.MappingRule `json:"ruleData,omitempty"`
    30  }
    31  
    32  type mappingRuleChangesByOpAscNameAscIDAsc []MappingRuleChange
    33  
    34  func (a mappingRuleChangesByOpAscNameAscIDAsc) Len() int      { return len(a) }
    35  func (a mappingRuleChangesByOpAscNameAscIDAsc) Swap(i, j int) { a[i], a[j] = a[j], a[i] }
    36  func (a mappingRuleChangesByOpAscNameAscIDAsc) Less(i, j int) bool {
    37  	if a[i].Op < a[j].Op {
    38  		return true
    39  	}
    40  	if a[i].Op > a[j].Op {
    41  		return false
    42  	}
    43  	// For adds and changes.
    44  	if a[i].RuleData != nil && a[j].RuleData != nil {
    45  		return a[i].RuleData.Name < a[j].RuleData.Name
    46  	}
    47  	// For deletes.
    48  	if a[i].RuleID != nil && a[j].RuleID != nil {
    49  		return *a[i].RuleID < *a[j].RuleID
    50  	}
    51  	// This should not happen
    52  	return false
    53  }