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redshift.go
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redshift.go
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package main
import (
"encoding/json"
"errors"
"fmt"
s "github.com/andrew-sledge/redshift/sends"
"github.com/fzzy/radix/extra/cluster"
"github.com/fzzy/radix/redis"
"menteslibres.net/gosexy/yaml"
"os"
"reflect"
"strings"
"time"
)
func StringInSlice(a string, list []string) bool {
for _, b := range list {
if b == a {
return true
}
}
return false
}
func Send(ts string, data []byte, settings *yaml.Yaml, senders []string) error {
debug := settings.Get("debug").(bool)
var message s.Message
err := json.Unmarshal(data, &message)
if err != nil {
e := fmt.Sprintf("[%s] ERROR Error received: %s\n", ts, err)
return errors.New(e)
}
// Fan out to sends
var sr s.SendRunner
var payload s.Payload
payload.Message = message
payload.ProcessTime = ts
payload.Settings = *settings
var payloads []s.Payload
payloads = append(payloads, payload)
in := make([]reflect.Value, len(payloads))
for i, param := range payloads {
in[i] = reflect.ValueOf(param)
}
for _, send_func := range senders {
reflect.ValueOf(&sr).MethodByName(send_func).Call(in)
if debug {
fmt.Printf("[%s] INFO Message %+v successfully sent to %s.", ts, message, send_func)
}
}
return nil
}
func PullNode(settings *yaml.Yaml) (rc *redis.Client) {
redis_connection := settings.Get("redis_connection").(string)
rc, err := redis.DialTimeout("tcp", redis_connection, time.Duration(10)*time.Second)
s.CheckError(err, true)
return rc
}
func PullCluster(settings *yaml.Yaml) (rc *cluster.Cluster) {
redis_connection := settings.Get("redis_connection").(string)
rc, err := cluster.NewClusterTimeout(redis_connection, time.Duration(10)*time.Second)
s.CheckError(err, true)
return rc
}
func main() {
var yml_config_file string
y_c, e := os.LookupEnv("REDSHIFT_CONFIG")
if e == false {
yml_config_file = "config.yml"
} else {
yml_config_file = y_c
}
settings, err := yaml.Open(yml_config_file)
s.CheckError(err, true)
debug := settings.Get("debug").(bool)
senders := make([]string, 0)
k := settings.Get("sends")
for m, _ := range k.(map[interface{}]interface{}) {
n := fmt.Sprintf("%sGo", strings.Title(m.(string)))
senders = append(senders, n)
}
// There's probably a better way to do this
redis_is_cluster := settings.Get("redis_is_cluster").(bool)
redis_list := settings.Get("redis_list").(string)
redis_watch_interval := settings.Get("redis_watch_interval").(int)
t := time.Now()
ts := t.Format("Mon Jan 2 15:04:05 -0700 MST 2006")
var rClient *redis.Client
var rCluster *cluster.Cluster
if redis_is_cluster {
if debug {
fmt.Printf("[%s] INFO Starting up in cluster mode\n", ts)
}
rCluster = PullCluster(settings)
defer rCluster.Close()
} else {
redis_db := settings.Get("redis_db").(int)
if debug {
fmt.Printf("[%s] INFO Starting up in single node mode\n", ts)
}
rClient = PullNode(settings)
defer rClient.Close()
rClient.Cmd("SELECT", redis_db)
}
var r *redis.Reply
if redis_is_cluster {
r = rCluster.Cmd("RPOP", redis_list)
} else {
r = rClient.Cmd("RPOP", redis_list)
}
for {
if redis_is_cluster {
r = rCluster.Cmd("RPOP", redis_list)
} else {
r = rClient.Cmd("RPOP", redis_list)
}
t = time.Now()
ts = t.Format("Mon Jan 2 15:04:05 -0700 MST 2006")
// If the response from redis is actual data, process and then pop another response off
// If not, who cares, go through the old switch case
for (r.Type == redis.BulkReply) {
t = time.Now()
ts = t.Format("Mon Jan 2 15:04:05 -0700 MST 2006")
data, err := r.Bytes()
if debug {
fmt.Printf("[%s] INFO BulkReply reply received. Data length %d\n", ts, len(data))
}
if err != nil {
fmt.Printf("[%s] ERROR Error received: %s\n", ts, err)
} else {
err := Send(ts, data, settings, senders)
if err != nil {
fmt.Printf(err.Error())
}
}
if redis_is_cluster {
r = rCluster.Cmd("RPOP", redis_list)
} else {
r = rClient.Cmd("RPOP", redis_list)
}
}
switch r.Type {
case redis.ErrorReply:
fmt.Printf("[%s] ERROR ErrorReply received: %s\n", ts, r.Err.Error())
case redis.NilReply:
if debug {
fmt.Printf("[%s] INFO NilReply reply received\n", ts)
}
case redis.StatusReply:
if debug {
fmt.Printf("[%s] INFO StatusReply reply received: not processing\n", ts)
}
case redis.MultiReply:
if debug {
fmt.Printf("[%s] INFO MultiReply reply received: not processing\n", ts)
}
case redis.IntegerReply:
if debug {
fmt.Printf("[%s] INFO IntegerReply reply received: not processing\n", ts)
}
default:
if debug {
fmt.Printf("[%s] INFO Unknown reply received: not processing\n", ts)
}
}
time.Sleep(time.Duration(redis_watch_interval) * time.Millisecond)
}
}