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index.go
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index.go
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package es
import (
"context"
"database/sql"
"encoding/json"
"fmt"
log "github.com/Sirupsen/logrus"
"github.com/pkg/errors"
"gopkg.in/olivere/elastic.v6"
"github.com/Bnei-Baruch/archive-backend/bindata"
"github.com/Bnei-Baruch/archive-backend/consts"
)
type Scope struct {
ContentUnitUID string
FileUID string
CollectionUID string
TagUID string
SourceUID string
PersonUID string
PublisherUID string
TweetTID string
BlogPostWPID string
}
type Index interface {
ReindexAll() error
Update(scope Scope) error
CreateIndex() error
DeleteIndex() error
RefreshIndex() error
ResultType() string
}
type BaseIndex struct {
resultType string
namespace string
baseName string
indexDate string
db *sql.DB
esc *elastic.Client
}
func IndexAliasName(namespace string, name string, lang string) string {
if namespace == "" || name == "" || lang == "" {
panic(fmt.Sprintf("Not expecting empty parameter for IndexName, provided: (%s, %s, %s)", namespace, name, lang))
}
return fmt.Sprintf("%s_%s_%s", namespace, name, lang)
}
func IndexName(namespace string, name string, lang string, date string) string {
if date == "" {
panic(fmt.Sprintf("Not expecting empty parameter for IndexName, provided: (%s, %s, %s, %s)", namespace, name, lang, date))
}
return fmt.Sprintf("%s_%s", IndexAliasName(namespace, name, lang), date)
}
func (index *BaseIndex) ResultType() string {
return index.resultType
}
func (index *BaseIndex) indexName(lang string) string {
if index.namespace == "" || index.baseName == "" || index.indexDate == "" {
panic("Index namespace, baseName and indexDate should be set.")
}
return IndexName(index.namespace, index.baseName, lang, index.indexDate)
}
func (index *BaseIndex) indexAliasName(lang string) string {
if index.namespace == "" || index.baseName == "" {
panic("Index namespace and baseName should be set.")
}
return IndexAliasName(index.namespace, index.baseName, lang)
}
func (index *BaseIndex) CreateIndex() error {
for _, lang := range consts.ALL_KNOWN_LANGS {
name := index.indexName(lang)
// Do nothing if index already exists.
exists, err := index.esc.IndexExists(name).Do(context.TODO())
log.Debugf("Create index, exists: %t.", exists)
if err != nil {
return err
}
if exists {
log.Debugf("Index already exists (%+v), skipping.", name)
continue
}
definition := fmt.Sprintf("data/es/mappings/%s/%s-%s.json", index.baseName, index.baseName, lang)
// Read mappings and create index
mappings, err := bindata.Asset(definition)
if err != nil {
return errors.Wrapf(err, "Failed loading mapping %s", definition)
}
var bodyJson map[string]interface{}
if err = json.Unmarshal(mappings, &bodyJson); err != nil {
return errors.Wrap(err, "json.Unmarshal")
}
// Create index.
res, err := index.esc.CreateIndex(name).BodyJson(bodyJson).Do(context.TODO())
if err != nil {
return errors.Wrap(err, "Create index")
}
if !res.Acknowledged {
return errors.Errorf("Index creation wasn't acknowledged: %s", name)
}
log.Debugf("Created index: %+v", name)
}
return nil
}
func (index *BaseIndex) DeleteIndex() error {
for _, lang := range consts.ALL_KNOWN_LANGS {
if err := index.deleteIndexByLang(lang); err != nil {
return err
}
}
return nil
}
func (index *BaseIndex) deleteIndexByLang(lang string) error {
i18nName := index.indexName(lang)
exists, err := index.esc.IndexExists(i18nName).Do(context.TODO())
if err != nil {
return err
}
if exists {
res, err := index.esc.DeleteIndex(i18nName).Do(context.TODO())
if err != nil {
return errors.Wrap(err, "Delete index")
}
if !res.Acknowledged {
return errors.Errorf("Index deletion wasn't acknowledged: %s", i18nName)
}
}
return nil
}
func (index *BaseIndex) RefreshIndex() error {
for _, lang := range consts.ALL_KNOWN_LANGS {
if err := index.RefreshIndexByLang(lang); err != nil {
return err
}
}
return nil
}
func (index *BaseIndex) RefreshIndexByLang(lang string) error {
_, err := index.esc.Refresh(index.indexName(lang)).Do(context.TODO())
// fmt.Printf("\n\n\nShards: %+v \n\n\n", shards)
return err
}
func (index *BaseIndex) FilterByResultTypeQuery(resultType string) *elastic.BoolQuery {
return elastic.NewBoolQuery().Filter(elastic.NewTermsQuery(consts.ES_RESULT_TYPE, resultType))
}
func (index *BaseIndex) RemoveFromIndexQuery(elasticScope elastic.Query) ([]string, error) {
source, err := elasticScope.Source()
if err != nil {
return []string{}, err
}
jsonBytes, err := json.Marshal(source)
if err != nil {
return []string{}, err
}
log.Infof("Results Index - Removing from index. Scope: %s", string(jsonBytes))
removed := make(map[string]bool)
for _, lang := range consts.ALL_KNOWN_LANGS {
indexName := index.indexName(lang)
searchRes, err := index.esc.Search(indexName).Query(elasticScope).Do(context.TODO())
if err != nil {
return []string{}, err
}
for _, h := range searchRes.Hits.Hits {
var cu ContentUnit
err := json.Unmarshal(*h.Source, &cu)
if err != nil {
return []string{}, err
}
removed[cu.MDB_UID] = true
}
delRes, err := index.esc.DeleteByQuery(indexName).
Query(elasticScope).
Do(context.TODO())
if err != nil {
return []string{}, errors.Wrapf(err, "Results Index - Remove from index %s %+v\n", indexName, elasticScope)
}
if delRes.Deleted > 0 {
fmt.Printf("Results Index - Deleted %d documents from %s.\n", delRes.Deleted, indexName)
}
}
if len(removed) == 0 {
fmt.Println("Results Index - Nothing was delete.")
return []string{}, nil
}
keys := make([]string, 0)
for k := range removed {
keys = append(keys, k)
}
return keys, nil
}