From 2da7f2fdfc8c0c1ec924da48e7f2bd89ff55ea14 Mon Sep 17 00:00:00 2001
From: Leonid Bugaev <leonsbox@gmail.com>
Date: Tue, 5 Nov 2019 15:19:12 +0300
Subject: [PATCH] Add a way to generate ES id (#169)

Added new `generate_id` config option
---
 pumps/elasticsearch.go | 27 +++++++++++++++++++--------
 1 file changed, 19 insertions(+), 8 deletions(-)

diff --git a/pumps/elasticsearch.go b/pumps/elasticsearch.go
index 7f199c38e..115490789 100644
--- a/pumps/elasticsearch.go
+++ b/pumps/elasticsearch.go
@@ -3,6 +3,7 @@ package pumps
 import (
 	"context"
 	"errors"
+	"fmt"
 	"time"
 
 	"github.com/mitchellh/mapstructure"
@@ -11,6 +12,7 @@ import (
 	elasticv6 "gopkg.in/olivere/elastic.v6"
 
 	"github.com/TykTechnologies/logrus"
+	"github.com/TykTechnologies/murmur3"
 	"github.com/TykTechnologies/tyk-pump/analytics"
 )
 
@@ -28,6 +30,7 @@ type ElasticsearchConf struct {
 	DocumentType       string `mapstructure:"document_type"`
 	RollingIndex       bool   `mapstructure:"rolling_index"`
 	ExtendedStatistics bool   `mapstructure:"extended_stats"`
+	GenerateID         bool   `mapstructure:"generate_id"`
 	Version            string `mapstructure:"version"`
 }
 
@@ -178,7 +181,7 @@ func getIndexName(esConf *ElasticsearchConf) string {
 	return indexName
 }
 
-func getMapping(datum analytics.AnalyticsRecord, extendedStatistics bool) map[string]interface{} {
+func getMapping(datum analytics.AnalyticsRecord, extendedStatistics bool, generateID bool) (map[string]interface{}, string) {
 	record := datum
 
 	mapping := map[string]interface{}{
@@ -202,7 +205,15 @@ func getMapping(datum analytics.AnalyticsRecord, extendedStatistics bool) map[st
 		mapping["raw_response"] = record.RawResponse
 		mapping["user_agent"] = record.UserAgent
 	}
-	return mapping
+
+	if generateID {
+		hasher := murmur3.New64()
+		hasher.Write([]byte(fmt.Sprintf("%d%s%s%s%s%s%d%s", record.TimeStamp.UnixNano(), record.Method, record.Path, record.IPAddress, record.APIID, record.OauthID, record.RequestTime, record.Alias)))
+
+		return mapping, string(hasher.Sum(nil))
+	}
+
+	return mapping, ""
 }
 
 func (e Elasticsearch3Operator) processData(data []interface{}, esConf *ElasticsearchConf) error {
@@ -217,9 +228,9 @@ func (e Elasticsearch3Operator) processData(data []interface{}, esConf *Elastics
 			continue
 		}
 
-		mapping := getMapping(d, esConf.ExtendedStatistics)
+		mapping, id := getMapping(d, esConf.ExtendedStatistics, esConf.GenerateID)
 
-		_, err := index.BodyJson(mapping).Type(esConf.DocumentType).Do()
+		_, err := index.BodyJson(mapping).Type(esConf.DocumentType).Id(id).Do()
 		if err != nil {
 			log.WithFields(logrus.Fields{
 				"prefix": elasticsearchPrefix,
@@ -242,9 +253,9 @@ func (e Elasticsearch5Operator) processData(data []interface{}, esConf *Elastics
 			continue
 		}
 
-		mapping := getMapping(d, esConf.ExtendedStatistics)
+		mapping, id := getMapping(d, esConf.ExtendedStatistics, esConf.GenerateID)
 
-		_, err := index.BodyJson(mapping).Type(esConf.DocumentType).Do(context.TODO())
+		_, err := index.BodyJson(mapping).Type(esConf.DocumentType).Id(id).Do(context.TODO())
 		if err != nil {
 			log.WithFields(logrus.Fields{
 				"prefix": elasticsearchPrefix,
@@ -267,9 +278,9 @@ func (e Elasticsearch6Operator) processData(data []interface{}, esConf *Elastics
 			continue
 		}
 
-		mapping := getMapping(d, esConf.ExtendedStatistics)
+		mapping, id := getMapping(d, esConf.ExtendedStatistics, esConf.GenerateID)
 
-		_, err := index.BodyJson(mapping).Type(esConf.DocumentType).Do(context.Background())
+		_, err := index.BodyJson(mapping).Type(esConf.DocumentType).Id(id).Do(context.Background())
 		if err != nil {
 			log.WithFields(logrus.Fields{
 				"prefix": elasticsearchPrefix,