/
redis.go
69 lines (54 loc) · 1.38 KB
/
redis.go
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package main
import (
"fmt"
dmetrics "github.com/cloudfoundry/dropsonde/metrics"
redis "github.com/garyburd/redigo/redis"
"strings"
)
type Client interface {
Disconnect() error
Info() (map[string]string, error)
InfoField(fieldName string) (string, error)
EmitMetric(m *metric) error
Address() string
}
func (c *client) EmitMetric(m *metric) error {
err := dmetrics.SendValue(m.Name, m.Value, m.Unit)
if err != nil {
return fmt.Errorf("Error emitting metric %v", m)
}
return nil
}
func (c *client) Address() string {
return fmt.Sprintf("%s:%d", c.Host, c.Port)
}
func (c *client) Disconnect() error {
return c.Connection.Close()
}
func (client *client) Info() (map[string]string, error) {
info := map[string]string{}
response, err := redis.String(client.Connection.Do("info"))
if err != nil {
return nil, err
}
for _, entry := range strings.Split(response, "\n") {
trimmedEntry := strings.TrimSpace(entry)
if trimmedEntry == "" || trimmedEntry[0] == '#' {
continue
}
pair := strings.Split(trimmedEntry, ":")
info[pair[0]] = pair[1]
}
return info, nil
}
func (client *client) InfoField(fieldName string) (string, error) {
info, err := client.Info()
if err != nil {
return "", fmt.Errorf("Error during redis info: %s" + err.Error())
}
value, ok := info[fieldName]
if !ok {
return "", fmt.Errorf("Unknown field: %s", fieldName)
}
return value, nil
}