Move Elasticsearch to source available 🎉 🎉 (#29015)

* Move Elasticsearch to source available

server/enterprise/elasticsearch/opensearch/indexing_job.go

@@ -0,0 +1,73 @@
+// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.enterprise for license information.
+
+package opensearch
+
+import (
+	"context"
+	"io"
+	"time"
+
+	"github.com/mattermost/mattermost/server/v8/enterprise/elasticsearch/common"
+
+	"github.com/opensearch-project/opensearch-go/v4/opensearchutil"
+
+	"github.com/mattermost/mattermost/server/public/model"
+	"github.com/mattermost/mattermost/server/public/shared/mlog"
+	"github.com/mattermost/mattermost/server/v8/channels/app"
+)
+
+type OpensearchIndexerInterfaceImpl struct {
+	Server        *app.Server
+	bulkProcessor opensearchutil.BulkIndexer
+}
+
+func (esi *OpensearchIndexerInterfaceImpl) MakeWorker() model.Worker {
+	const workerName = "EnterpriseOpensearchIndexer"
+
+	// Initializing logger
+	logger := esi.Server.Jobs.Logger().With(mlog.String("worker_name", workerName))
+
+	// Creating the client
+	client, appErr := createClient(logger, esi.Server.Jobs.Config(), esi.Server.Platform().FileBackend(), true)
+	if appErr != nil {
+		logger.Error("Worker: Failed to Create Client", mlog.Err(appErr))
+		return nil
+	}
+
+	return common.NewIndexerWorker(workerName,
+		esi.Server.Jobs,
+		logger,
+		esi.Server.Platform().FileBackend(),
+		esi.Server.License,
+		func() error {
+			// Creating the bulk indexer from the client.
+			biCfg := opensearchutil.BulkIndexerConfig{
+				Client: client,
+				OnError: func(_ context.Context, err error) {
+					logger.Error("Error from opensearch bulk indexer", mlog.Err(err))
+				},
+				Timeout:    time.Duration(*esi.Server.Jobs.Config().ElasticsearchSettings.RequestTimeoutSeconds) * time.Second,
+				NumWorkers: common.NumIndexWorkers(),
+			}
+			if *esi.Server.Jobs.Config().ElasticsearchSettings.Trace == "all" {
+				biCfg.DebugLogger = common.NewBulkIndexerLogger(logger, workerName)
+			}
+			var err error
+			esi.bulkProcessor, err = opensearchutil.NewBulkIndexer(biCfg)
+			return err
+		},
+		// Function to add an item in the bulk processor
+		func(indexName, indexOp, docID string, body io.ReadSeeker) error {
+			return esi.bulkProcessor.Add(context.Background(), opensearchutil.BulkIndexerItem{
+				Index:      indexName,
+				Action:     indexOp,
+				DocumentID: docID,
+				Body:       body,
+			})
+		},
+		// Closing the bulk processor
+		func() error {
+			return esi.bulkProcessor.Close(context.Background())
+		})
+}