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Fix concurrency in ES client message buffer #54

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Fix concurrency in ES client message buffer #54

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6 changes: 6 additions & 0 deletions plugins/application/elasticsearch/main.go
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Original file line number Diff line number Diff line change
Expand Up @@ -3,6 +3,7 @@ package main
import (
"bytes"
"context"
"sync"
"time"

"github.com/infrawatch/apputils/logging"
Expand Down Expand Up @@ -52,6 +53,7 @@ type Elasticsearch struct {
logger *logging.Logger
client *lib.Client
buffer map[string][]string
bufferMutex sync.RWMutex
dump chan esIndex
}

Expand Down Expand Up @@ -88,19 +90,23 @@ func (es *Elasticsearch) ReceiveEvent(event data.Event) {
// buffer or index record
var recordList []string
if es.configuration.BufferSize > 1 {
es.bufferMutex.Lock()
if _, ok := es.buffer[event.Index]; !ok {
es.buffer[event.Index] = make([]string, 0, es.configuration.BufferSize)
}

es.buffer[event.Index] = append(es.buffer[event.Index], record)
if len(es.buffer[event.Index]) < es.configuration.BufferSize {
es.bufferMutex.Unlock()
// buffer is not full, don't send
es.logger.Metadata(logging.Metadata{"plugin": appname, "record": record})
es.logger.Debug("buffering record")
return
}
recordList = es.buffer[event.Index]
delete(es.buffer, event.Index)
es.bufferMutex.Unlock()

} else {
recordList = []string{record}
}
Expand Down