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worker.go
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worker.go
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package consumerLibrary
import (
"github.com/aliyun/aliyun-log-go-sdk"
"github.com/go-kit/kit/log"
"github.com/go-kit/kit/log/level"
lumberjack "gopkg.in/natefinch/lumberjack.v2"
"os"
"sync"
"time"
)
type ConsumerWorker struct {
consumerHeatBeat *ConsumerHeatBeat
client *ConsumerClient
workerShutDownFlag bool
shardConsumer map[int]*ShardConsumerWorker
do func(shard int, logGroup *sls.LogGroupList) string
waitGroup sync.WaitGroup
Logger log.Logger
}
func InitConsumerWorker(option LogHubConfig, do func(int, *sls.LogGroupList) string) *ConsumerWorker {
logger := logConfig(option)
consumerClient := initConsumerClient(option, logger)
consumerHeatBeat := initConsumerHeatBeat(consumerClient, logger)
consumerWorker := &ConsumerWorker{
consumerHeatBeat: consumerHeatBeat,
client: consumerClient,
workerShutDownFlag: false,
shardConsumer: make(map[int]*ShardConsumerWorker),
do: do,
Logger: logger,
}
consumerClient.createConsumerGroup()
return consumerWorker
}
func (consumerWorker *ConsumerWorker) Start() {
consumerWorker.waitGroup.Add(1)
go consumerWorker.run()
}
func (consumerWorker *ConsumerWorker) StopAndWait() {
level.Info(consumerWorker.Logger).Log("msg", "*** try to exit ***")
consumerWorker.workerShutDownFlag = true
consumerWorker.consumerHeatBeat.shutDownHeart()
consumerWorker.waitGroup.Wait()
level.Info(consumerWorker.Logger).Log("msg", "consumer worker %v stopped", "consumer name", consumerWorker.client.option.ConsumerName)
}
func (consumerWorker *ConsumerWorker) run() {
level.Info(consumerWorker.Logger).Log("msg", "consumer worker start", "worker name", consumerWorker.client.option.ConsumerName)
defer consumerWorker.waitGroup.Done()
go consumerWorker.consumerHeatBeat.heartBeatRun()
for !consumerWorker.workerShutDownFlag {
heldShards := consumerWorker.consumerHeatBeat.getHeldShards()
lastFetchTime := time.Now().UnixNano() / 1000 / 1000
for _, shard := range heldShards {
if consumerWorker.workerShutDownFlag {
break
}
shardConsumer := consumerWorker.getShardConsumer(shard)
if shardConsumer.getConsumerIsCurrentDoneStatus() == true {
shardConsumer.consume()
} else {
continue
}
}
consumerWorker.cleanShardConsumer(heldShards)
TimeToSleepInMillsecond(consumerWorker.client.option.DataFetchIntervalInMs, lastFetchTime, consumerWorker.workerShutDownFlag)
}
level.Info(consumerWorker.Logger).Log("msg", "consumer worker try to cleanup consumers", "worker name", consumerWorker.client.option.ConsumerName)
consumerWorker.shutDownAndWait()
}
func (consumerWorker *ConsumerWorker) shutDownAndWait() {
for {
time.Sleep(500 * time.Millisecond)
for shard, consumer := range consumerWorker.shardConsumer {
if !consumer.isShutDownComplete() {
consumer.consumerShutDown()
} else if consumer.isShutDownComplete() {
delete(consumerWorker.shardConsumer, shard)
}
}
if len(consumerWorker.shardConsumer) == 0 {
break
}
}
}
func (consumerWorker *ConsumerWorker) getShardConsumer(shardId int) *ShardConsumerWorker {
consumer := consumerWorker.shardConsumer[shardId]
if consumer != nil {
return consumer
}
consumer = initShardConsumerWorker(shardId, consumerWorker.client, consumerWorker.do, consumerWorker.Logger)
consumerWorker.shardConsumer[shardId] = consumer
return consumer
}
func (consumerWorker *ConsumerWorker) cleanShardConsumer(owned_shards []int) {
for shard, consumer := range consumerWorker.shardConsumer {
if !Contain(shard, owned_shards) {
level.Info(consumerWorker.Logger).Log("msg", "try to call shut down for unassigned consumer shard", "shardId", shard)
consumer.consumerShutDown()
level.Info(consumerWorker.Logger).Log("msg", "Complete call shut down for unassigned consumer shard", "shardId", shard)
}
if consumer.isShutDownComplete() {
isDeleteShard := consumerWorker.consumerHeatBeat.removeHeartShard(shard)
if isDeleteShard {
level.Info(consumerWorker.Logger).Log("msg", "Remove an assigned consumer shard", "shardId", shard)
delete(consumerWorker.shardConsumer, shard)
} else {
level.Info(consumerWorker.Logger).Log("msg", "Remove an assigned consumer shard failed", "shardId", shard)
}
}
}
}
// This function is used to initialize the global log configuration
func logConfig(option LogHubConfig) log.Logger {
var logger log.Logger
if option.LogFileName == "" {
if option.IsJsonType {
logger = log.NewJSONLogger(log.NewSyncWriter(os.Stdout))
} else {
logger = log.NewLogfmtLogger(log.NewSyncWriter(os.Stdout))
}
} else {
if option.IsJsonType {
logger = log.NewLogfmtLogger(initLogFlusher(option))
} else {
logger = log.NewJSONLogger(initLogFlusher(option))
}
}
switch option.AllowLogLevel {
case "debug":
logger = level.NewFilter(logger, level.AllowDebug())
case "info":
logger = level.NewFilter(logger, level.AllowInfo())
case "warn":
logger = level.NewFilter(logger, level.AllowWarn())
case "error":
logger = level.NewFilter(logger, level.AllowError())
default:
logger = level.NewFilter(logger, level.AllowInfo())
}
logger = log.With(logger, "time", log.DefaultTimestampUTC, "caller", log.DefaultCaller)
return logger
}
func initLogFlusher(option LogHubConfig) *lumberjack.Logger {
if option.LogMaxSize == 0 {
option.LogMaxSize = 10
}
if option.LogMaxBackups == 0 {
option.LogMaxBackups = 10
}
return &lumberjack.Logger{
Filename: option.LogFileName,
MaxSize: option.LogMaxSize,
MaxBackups: option.LogMaxBackups,
Compress: option.LogCompass,
}
}