94 lines
1.8 KiB
Go
94 lines
1.8 KiB
Go
package numpin
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import (
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"encoding/json"
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"errors"
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"time"
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"github.com/ipfs/ipfs-cluster/config"
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"github.com/kelseyhightower/envconfig"
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)
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const configKey = "numpin"
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const envConfigKey = "cluster_numpin"
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// These are the default values for a Config.
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const (
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DefaultMetricTTL = 10 * time.Second
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)
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// Config allows to initialize an Informer.
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type Config struct {
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config.Saver
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MetricTTL time.Duration
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}
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type jsonConfig struct {
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MetricTTL string `json:"metric_ttl"`
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}
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// ConfigKey returns a human-friendly identifier for this
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// Config's type.
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func (cfg *Config) ConfigKey() string {
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return configKey
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}
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// Default initializes this Config with sensible values.
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func (cfg *Config) Default() error {
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cfg.MetricTTL = DefaultMetricTTL
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return nil
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}
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// ApplyEnvVars fills in any Config fields found
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// as environment variables.
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func (cfg *Config) ApplyEnvVars() error {
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jcfg := &jsonConfig{}
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err := envconfig.Process(envConfigKey, jcfg)
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if err != nil {
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return err
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}
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return cfg.applyJSONConfig(jcfg)
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}
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// Validate checks that the fields of this configuration have
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// sensible values.
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func (cfg *Config) Validate() error {
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if cfg.MetricTTL <= 0 {
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return errors.New("disk.metric_ttl is invalid")
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}
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return nil
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}
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// LoadJSON parses a raw JSON byte-slice as generated by ToJSON().
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func (cfg *Config) LoadJSON(raw []byte) error {
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jcfg := &jsonConfig{}
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err := json.Unmarshal(raw, jcfg)
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if err != nil {
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return err
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}
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cfg.Default()
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return cfg.applyJSONConfig(jcfg)
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}
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func (cfg *Config) applyJSONConfig(jcfg *jsonConfig) error {
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t, _ := time.ParseDuration(jcfg.MetricTTL)
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cfg.MetricTTL = t
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return cfg.Validate()
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}
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// ToJSON generates a human-friendly JSON representation of this Config.
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func (cfg *Config) ToJSON() ([]byte, error) {
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jcfg := &jsonConfig{}
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jcfg.MetricTTL = cfg.MetricTTL.String()
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return config.DefaultJSONMarshal(jcfg)
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}
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