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forgejo/modules/indexer/internal/meilisearch/indexer.go
Jason Song 1e76a824bc
Refactor and enhance issue indexer to support both searching, filtering and paging (#26012)
Fix #24662.

Replace #24822 and #25708 (although it has been merged)


## Background

In the past, Gitea supported issue searching with a keyword and
conditions in a less efficient way. It worked by searching for issues
with the keyword and obtaining limited IDs (as it is heavy to get all)
on the indexer (bleve/elasticsearch/meilisearch), and then querying with
conditions on the database to find a subset of the found IDs. This is
why the results could be incomplete.

To solve this issue, we need to store all fields that could be used as
conditions in the indexer and support both keyword and additional
conditions when searching with the indexer.

## Major changes

- Redefine `IndexerData` to include all fields that could be used as
filter conditions.
- Refactor `Search(ctx context.Context, kw string, repoIDs []int64,
limit, start int, state string)` to `Search(ctx context.Context, options
*SearchOptions)`, so it supports more conditions now.
- Change the data type stored in `issueIndexerQueue`. Use
`IndexerMetadata` instead of `IndexerData` in case the data has been
updated while it is in the queue. This also reduces the storage size of
the queue.
- Enhance searching with Bleve/Elasticsearch/Meilisearch, make them
fully support `SearchOptions`. Also, update the data versions.
- Keep most logic of database indexer, but remove
`issues.SearchIssueIDsByKeyword` in `models` to avoid confusion where is
the entry point to search issues.
- Start a Meilisearch instance to test it in unit tests.
- Add unit tests with almost full coverage to test
Bleve/Elasticsearch/Meilisearch indexer.

---------

Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
2023-07-31 06:28:53 +00:00

95 lines
1.9 KiB
Go

// Copyright 2023 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package meilisearch
import (
"context"
"fmt"
"github.com/meilisearch/meilisearch-go"
)
// Indexer represents a basic meilisearch indexer implementation
type Indexer struct {
Client *meilisearch.Client
url, apiKey string
indexName string
version int
settings *meilisearch.Settings
}
func NewIndexer(url, apiKey, indexName string, version int, settings *meilisearch.Settings) *Indexer {
return &Indexer{
url: url,
apiKey: apiKey,
indexName: indexName,
version: version,
settings: settings,
}
}
// Init initializes the indexer
func (i *Indexer) Init(_ context.Context) (bool, error) {
if i == nil {
return false, fmt.Errorf("cannot init nil indexer")
}
if i.Client != nil {
return false, fmt.Errorf("indexer is already initialized")
}
i.Client = meilisearch.NewClient(meilisearch.ClientConfig{
Host: i.url,
APIKey: i.apiKey,
})
_, err := i.Client.GetIndex(i.VersionedIndexName())
if err == nil {
return true, nil
}
_, err = i.Client.CreateIndex(&meilisearch.IndexConfig{
Uid: i.VersionedIndexName(),
PrimaryKey: "id",
})
if err != nil {
return false, err
}
i.checkOldIndexes()
_, err = i.Client.Index(i.VersionedIndexName()).UpdateSettings(i.settings)
return false, err
}
// Ping checks if the indexer is available
func (i *Indexer) Ping(ctx context.Context) error {
if i == nil {
return fmt.Errorf("cannot ping nil indexer")
}
if i.Client == nil {
return fmt.Errorf("indexer is not initialized")
}
resp, err := i.Client.Health()
if err != nil {
return err
}
if resp.Status != "available" {
// See https://docs.meilisearch.com/reference/api/health.html#status
return fmt.Errorf("status of meilisearch is not available: %s", resp.Status)
}
return nil
}
// Close closes the indexer
func (i *Indexer) Close() {
if i == nil {
return
}
if i.Client == nil {
return
}
i.Client = nil
}