/
config.go
107 lines (96 loc) · 3.03 KB
/
config.go
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package silicon
import (
"fmt"
"github.com/kless/goconfig/config"
"github.com/robyoung/go-whisper"
"regexp"
)
/*
storageSchemas, err := ParseStorageSchemas(path)
retentions, err := storageSchemas.Retentions(key)
carbonConf, err := ParseCarbonConf(path)
carbonConf.Get("CARBON_PATH")
*/
/*
Retrieve Whisper configuration details for a given key from a file.
*/
type fileStorageResolver struct {
schemas *config.Config
aggregation *config.Config
}
func NewFileStorageResolver(schemasPath, aggregationPath string) (*fileStorageResolver, error) {
resolver := new(fileStorageResolver)
schemas, err := config.ReadDefault(schemasPath)
if err != nil {
return nil, err
}
resolver.schemas = schemas
aggregation, err := config.ReadDefault(aggregationPath)
if err != nil {
return nil, err
}
resolver.aggregation = aggregation
return resolver, nil
}
func (resolver *fileStorageResolver) Find(key string) (retentions whisper.Retentions, aggregationMethod whisper.AggregationMethod, xFilesFactor float32, err error) {
retentions, err = resolver.findRetentions(key)
if err != nil {
return nil, 0, 0, err
}
aggregationMethod, xFilesFactor, err = resolver.findAggregation(key)
if err != nil {
return nil, 0, 0, err
}
return
}
func (resolver *fileStorageResolver) findRetentions(key string) (whisper.Retentions, error) {
for _, section := range resolver.schemas.Sections()[1:] {
pattern, err := resolver.schemas.String(section, "pattern")
if err == nil {
if regexp.MustCompile(pattern).MatchString(key) {
retentionDef, err := resolver.schemas.String(section, "retentions")
if err != nil {
return nil, fmt.Errorf("Could not find retentions option for %v", section)
}
return whisper.ParseRetentionDefs(retentionDef)
}
}
}
return nil, fmt.Errorf("Could not find retention defs for '%v'", key)
}
func (resolver *fileStorageResolver) findAggregation(key string) (whisper.AggregationMethod, float32, error) {
for _, section := range resolver.aggregation.Sections()[1:] {
pattern, err := resolver.aggregation.String(section, "pattern")
if err == nil {
if regexp.MustCompile(pattern).MatchString(key) {
aggregationMethodS, err := resolver.aggregation.String(section, "aggregationMethod")
if err != nil {
return 0, 0, err
}
aggregationMethod, err := resolver.parseAggregationMethod(aggregationMethodS)
if err != nil {
return 0, 0, err
}
xFilesFactor, err := resolver.aggregation.Float(section, "xFilesFactor")
if err != nil {
return 0, 0, err
}
return aggregationMethod, float32(xFilesFactor), nil
}
}
}
return 0, 0, fmt.Errorf("Could not find aggregation defs for '%v'", key)
}
func (resolver *fileStorageResolver) parseAggregationMethod(aggregationMethod string) (whisper.AggregationMethod, error) {
switch aggregationMethod {
case "average":
return whisper.Average, nil
case "sum":
return whisper.Sum, nil
case "max":
return whisper.Max, nil
case "min":
return whisper.Min, nil
}
return 0, fmt.Errorf("Invalid aggregation method '%v'", aggregationMethod)
}