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indexer.go
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indexer.go
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package es
import (
"context"
"database/sql"
"fmt"
"regexp"
"strings"
log "github.com/Sirupsen/logrus"
"github.com/pkg/errors"
"gopkg.in/olivere/elastic.v6"
"github.com/Bnei-Baruch/archive-backend/consts"
"github.com/Bnei-Baruch/archive-backend/utils"
)
type Indexer struct {
indices []Index
}
func MakeProdIndexer(date string, mdb *sql.DB, esc *elastic.Client) (*Indexer, error) {
return MakeIndexer("prod", date, consts.ES_ALL_RESULT_TYPES, mdb, esc)
}
func MakeFakeIndexer(mdb *sql.DB, esc *elastic.Client) (*Indexer, error) {
return MakeIndexer("fake", "fake-date", []string{}, mdb, esc)
}
// Receives namespace and list of indexes names.
func MakeIndexer(namespace string, date string, names []string, mdb *sql.DB, esc *elastic.Client) (*Indexer, error) {
log.Infof("Indexer - Make indexer - %s - %s", namespace, strings.Join(names, ", "))
indexer := new(Indexer)
indexer.indices = make([]Index, len(names))
for i, name := range names {
if name == consts.ES_RESULT_TYPE_UNITS {
indexer.indices[i] = MakeContentUnitsIndex(namespace, date, mdb, esc)
} else if name == consts.ES_RESULT_TYPE_SOURCES {
indexer.indices[i] = MakeSourcesIndex(namespace, date, mdb, esc)
} else if name == consts.ES_RESULT_TYPE_TAGS {
indexer.indices[i] = MakeTagsIndex(namespace, date, mdb, esc)
} else if name == consts.ES_RESULT_TYPE_COLLECTIONS {
indexer.indices[i] = MakeCollectionsIndex(namespace, date, mdb, esc)
} else if name == consts.ES_RESULT_TYPE_BLOG_POSTS {
indexer.indices[i] = MakeBlogIndex(namespace, date, mdb, esc)
} else if name == consts.ES_RESULT_TYPE_TWEETS {
indexer.indices[i] = MakeTweeterIndex(namespace, date, mdb, esc)
} else {
return nil, errors.New(fmt.Sprintf("MakeIndexer - Invalid index name: %+v", name))
}
}
return indexer, nil
}
func ProdAliasedIndexDate(esc *elastic.Client) (error, string) {
return aliasedIndexDate(esc, "prod", consts.ES_RESULTS_INDEX)
}
func aliasedIndexDate(esc *elastic.Client, namespace string, name string) (error, string) {
aliasesService := elastic.NewAliasesService(esc)
prevIndicesByAlias := make(map[string]string)
aliasesRes, err := aliasesService.Do(context.TODO())
if err != nil {
return err, ""
}
for indexName, indexResult := range aliasesRes.Indices {
matched, err := regexp.MatchString(IndexName(namespace, name, ".*", ".*"), indexName)
if err != nil {
return err, ""
}
if matched {
if len(indexResult.Aliases) > 1 {
return errors.New(fmt.Sprintf("Expected no more then one alias for %s, got %d", indexName, len(indexResult.Aliases))), ""
}
if len(indexResult.Aliases) == 1 {
prevIndicesByAlias[indexResult.Aliases[0].AliasName] = indexName
}
}
}
date := ""
indicesExist := false
for _, lang := range consts.ALL_KNOWN_LANGS {
alias := IndexAliasName(namespace, name, lang)
prevIndex, ok := prevIndicesByAlias[alias]
if ok {
indicesExist = true
parts := strings.Split(prevIndex, "_")
if len(parts) != 4 {
return errors.New(fmt.Sprintf("Expected 4 parts in index name %s, got %d.", prevIndex, len(parts))), ""
}
if date == "" {
date = parts[len(parts)-1]
}
if date != parts[len(parts)-1] {
return errors.New(fmt.Sprintf("Expected index date to be %s got %s at index %s", date, parts[len(parts)], prevIndex)), ""
}
} else {
if indicesExist {
log.Warnf("Indexer - Did not find index name for %s", alias)
}
}
}
if date == "" && indicesExist {
return errors.New("At least one aliased index should have date specified."), ""
}
return nil, date
}
func SwitchProdAliasToCurrentIndex(date string, esc *elastic.Client) error {
return SwitchAliasToCurrentIndex("prod", consts.ES_RESULTS_INDEX, date, esc)
}
func SwitchAliasToCurrentIndex(namespace string, name string, date string, esc *elastic.Client) error {
err, prevDate := aliasedIndexDate(esc, namespace, name)
if err != nil {
return err
}
for _, lang := range consts.ALL_KNOWN_LANGS {
aliasService := elastic.NewAliasService(esc)
indexName := IndexName(namespace, name, lang, date)
alias := IndexAliasName(namespace, name, lang)
if prevDate != "" {
prevIndex := IndexName(namespace, name, lang, prevDate)
aliasService = aliasService.Remove(prevIndex, alias)
}
aliasService.Add(indexName, alias)
res, err := aliasService.Do(context.TODO())
if err != nil || !res.Acknowledged {
err = utils.JoinErrors(err, errors.Wrap(err, "Failed due to error or Acknowledged is false."))
continue
}
}
return err
}
func (indexer *Indexer) ReindexAll() error {
log.Info("Indexer - Re-Indexing everything")
if err := indexer.CreateIndexes(); err != nil {
return err
}
done := make(chan string)
errs := make([]error, len(indexer.indices))
for i := range indexer.indices {
go func(i int) {
errs[i] = indexer.indices[i].ReindexAll()
done <- indexer.indices[i].ResultType()
}(i)
}
for _ = range indexer.indices {
name := <-done
log.Infof("Finished: %s", name)
}
for _, err := range errs {
if err != nil {
return err
}
}
return nil
}
func (indexer *Indexer) RefreshAll() error {
log.Info("Indexer - Refresh (sync new indexed documents) all indices.")
for _, index := range indexer.indices {
index.RefreshIndex()
}
return nil
}
func (indexer *Indexer) CreateIndexes() error {
log.Infof("Indexer - Create new indices in elastic: %+v", indexer.indices)
for _, index := range indexer.indices {
if err := index.CreateIndex(); err != nil {
return err
}
}
return nil
}
func (indexer *Indexer) DeleteIndexes() error {
log.Info("Indexer - Delete indices from elastic.")
for _, index := range indexer.indices {
if err := index.DeleteIndex(); err != nil {
return err
}
}
return nil
}
func (indexer *Indexer) Update(scope Scope) error {
err := (error)(nil)
for _, index := range indexer.indices {
err = utils.JoinErrors(err, index.Update(scope))
}
return err
}
// Set of MDB event handlers to incrementally change all indexes.
func (indexer *Indexer) CollectionUpdate(uid string) error {
log.Infof("Indexer - Index collection upadate event: %s", uid)
return indexer.Update(Scope{CollectionUID: uid})
}
func (indexer *Indexer) ContentUnitUpdate(uid string) error {
log.Infof("Indexer - Index content unit update event: %s", uid)
return indexer.Update(Scope{ContentUnitUID: uid})
}
func (indexer *Indexer) FileUpdate(uid string) error {
log.Infof("Indexer - Index file update event: %s", uid)
return indexer.Update(Scope{FileUID: uid})
}
func (indexer *Indexer) SourceUpdate(uid string) error {
log.Infof("Indexer - Index source update event: %s", uid)
return indexer.Update(Scope{SourceUID: uid})
}
func (indexer *Indexer) TagUpdate(uid string) error {
log.Infof("Indexer - Index tag update event: %s", uid)
return indexer.Update(Scope{TagUID: uid})
}
func (indexer *Indexer) PersonUpdate(uid string) error {
log.Infof("Indexer - Index person update event: %s", uid)
return indexer.Update(Scope{PersonUID: uid})
}
func (indexer *Indexer) PublisherUpdate(uid string) error {
log.Infof("Indexer - Index publisher update event: %s", uid)
return indexer.Update(Scope{PublisherUID: uid})
}
func (indexer *Indexer) BlogPostUpdate(id string) error {
log.Infof("Indexer - Index blog post update event: %v", id)
return indexer.Update(Scope{BlogPostWPID: id})
}
func (indexer *Indexer) TweetUpdate(tid string) error {
log.Infof("Indexer - Index tweet update event: %v", tid)
return indexer.Update(Scope{TweetTID: tid})
}