vendor/github.com/influxdata/influxdb/models/statistic.go


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package models

// Statistic is the representation of a statistic used by the monitoring service.
type Statistic struct {
    Name   string                 `json:"name"`
    Tags   map[string]string      `json:"tags"`
    Values map[string]interface{} `json:"values"`
}

// NewStatistic returns an initialized Statistic.
func NewStatistic(name string) Statistic {
    return Statistic{
        Name:   name,
        Tags:   make(map[string]string),
        Values: make(map[string]interface{}),
    }
}

// StatisticTags is a map that can be merged with others without causing
// mutations to either map.
type StatisticTags map[string]string

// Merge creates a new map containing the merged contents of tags and t.
// If both tags and the receiver map contain the same key, the value in tags
// is used in the resulting map.
//
// Merge always returns a usable map.
func (t StatisticTags) Merge(tags map[string]string) map[string]string {
    // Add everything in tags to the result.
    out := make(map[string]string, len(tags))
    for k, v := range tags {
        out[k] = v
    }

    // Only add values from t that don't appear in tags.
    for k, v := range t {
        if _, ok := tags[k]; !ok {
            out[k] = v
        }
    }
    return out
}