feat: es7 read data(scroll => search_after)

internal/cmd/run.go

@@ -208,7 +208,11 @@ func executeData(ctx context.Context, input, output interfaces.DumpIO) error {
 	log.Info("Query: got queries=%d", len(queries))
 
 Loop:
-	for _, query := range queries {
+	for qi, query := range queries {
+		bs, _ := json.Marshal(query)
+
+		log.Debug("Query[%d]: %s", qi, string(bs))
+
 		dch, ech = input.ReadData(ctx, f_limit, query, sources, []string{f_sort})
 
 		for {

internal/util/min.go

@@ -0,0 +1,11 @@
+package util
+
+import "cmp"
+
+func Min[T cmp.Ordered](a, b T) T {
+	if a <= b {
+		return a
+	}
+
+	return b
+}

internal/xes/xes7.go

@@ -70,63 +70,8 @@ func (c *client) Close() error {
 	return nil
 }
 
-//func (c *client) WriteData(ctx context.Context, docs []*model.ESSource) (int, error) {
-//	var (
-//		err     error
-//		indexer esutil.BulkIndexer
-//		count   int
-//		be      error
-//	)
-//	if indexer, err = esutil.NewBulkIndexer(esutil.BulkIndexerConfig{
-//		Client:     c.client,
-//		Index:      c.index,
-//		ErrorTrace: true,
-//		OnError: func(ctx context.Context, err error) {
-//
-//		},
-//	}); err != nil {
-//		return 0, err
-//	}
-//
-//	for _, doc := range docs {
-//		var bs []byte
-//
-//		if bs, err = json.Marshal(doc.Content); err != nil {
-//			return 0, err
-//		}
-//
-//		if err = indexer.Add(context.Background(), esutil.BulkIndexerItem{
-//			Action:     "index",
-//			Index:      c.index,
-//			DocumentID: doc.DocId,
-//			Body:       bytes.NewReader(bs),
-//			OnFailure: func(ctx context.Context, item esutil.BulkIndexerItem, item2 esutil.BulkIndexerResponseItem, bulkErr error) {
-//				be = bulkErr
-//			},
-//		}); err != nil {
-//			return 0, err
-//		}
-//		count++
-//	}
-//
-//	if err = indexer.Close(util.TimeoutCtx(ctx, opt.Timeout)); err != nil {
-//		return 0, err
-//	}
-//
-//	if be != nil {
-//		return 0, be
-//	}
-//
-//	stats := indexer.Stats()
-//	if stats.NumFailed > 0 {
-//		return count, fmt.Errorf("write to xes failed_count=%d bulk_count=%d", stats.NumFailed, count)
-//	}
-//
-//	return count, nil
-//}
-
 func (c *client) ReadData(ctx context.Context, size int, query map[string]any, source []string, sort []string) (<-chan []*model.ESSource, <-chan error) {
-	dch, ech := es7.ReadData(ctx, c.client, c.index, size, 0, query, source, sort)
+	dch, ech := es7.ReadDataV2(ctx, c.client, c.index, size, 0, query, source, sort)
 
 	return dch, ech
 }

model/es.go

@@ -4,6 +4,7 @@ type ESSource struct {
 	DocId   string         `json:"_id"`
 	Index   string         `json:"_index"`
 	Content map[string]any `json:"_source"`
+	Sort    []any          `json:"sort"`
 }
 
 type ESResponse struct {

xes/es7/read.go

@@ -14,7 +14,8 @@ import (
 	"time"
 )
 
-// ReadData es7 read data
+// ReadData
+// Deprecated
 // @param[source]: a list of include fields to extract and return from the _source field.
 // @param[sort]:   a list of <field>:<direction> pairs.
 func ReadData(ctx context.Context, client *elastic.Client, index string, size, max int, query map[string]any, source []string, sort []string) (<-chan []*model.ESSource, <-chan error) {
@@ -148,3 +149,113 @@ func ReadData(ctx context.Context, client *elastic.Client, index string, size, m
 
 	return dataCh, errCh
 }
+
+// ReadDataV2 es7 read data
+/*
+	- @param[source]: a list of include fields to extract and return from the _source field.
+    - @param[sort]:   a list of <field>:<direction> pairs.
+*/
+func ReadDataV2(
+	ctx context.Context,
+	client *elastic.Client,
+	index string,
+	size, max int,
+	query map[string]any,
+	source []string,
+	sort []string,
+) (<-chan []*model.ESSource, <-chan error) {
+	var (
+		dataCh = make(chan []*model.ESSource)
+		errCh  = make(chan error)
+	)
+
+	go func() {
+		var (
+			err         error
+			bs          []byte
+			resp        *esapi.Response
+			searchAfter = make([]any, 0)
+			total       = 0
+			body        = make(map[string]any)
+			qs          []func(request *esapi.SearchRequest)
+		)
+
+		if sort == nil {
+			sort = []string{}
+		}
+
+		if query != nil && len(query) > 0 {
+			body["query"] = query
+		}
+
+		sort = append(sort, "_id:ASC")
+
+		sorts := lo.Filter(sort, func(item string, index int) bool {
+			return item != ""
+		})
+
+		defer func() {
+			close(dataCh)
+			close(errCh)
+		}()
+
+		for {
+			qs = []func(*esapi.SearchRequest){
+				client.Search.WithContext(util.TimeoutCtx(ctx, 30)),
+				client.Search.WithIndex(index),
+				client.Search.WithSize(util.Min(size, max-total)),
+				client.Search.WithSort(sorts...),
+			}
+
+			if len(source) > 0 {
+				qs = append(qs, client.Search.WithSourceIncludes(source...))
+			}
+
+			delete(body, "search_after")
+			if len(searchAfter) > 0 {
+				body["search_after"] = searchAfter
+			}
+
+			if bs, err = json.Marshal(body); err != nil {
+				errCh <- err
+				return
+			}
+
+			qs = append(qs, client.Search.WithBody(bytes.NewReader(bs)))
+			if resp, err = client.Search(qs...); err != nil {
+				errCh <- err
+				return
+			}
+
+			if resp.StatusCode != 200 {
+				errCh <- fmt.Errorf("resp status=%d, resp=%s", resp.StatusCode, resp.String())
+				return
+			}
+
+			var result = new(model.ESResponse)
+			decoder := json.NewDecoder(resp.Body)
+			if err = decoder.Decode(result); err != nil {
+				errCh <- err
+				return
+			}
+
+			if resp.StatusCode != 200 {
+				errCh <- fmt.Errorf("resp status=%d, resp=%s", resp.StatusCode, resp.String())
+				return
+			}
+
+			dataCh <- result.Hits.Hits
+			total += len(result.Hits.Hits)
+
+			if len(result.Hits.Hits) < size || (max > 0 && total >= max) {
+				break
+			}
+
+			searchAfter = result.Hits.Hits[len(result.Hits.Hits)-1].Sort
+		}
+
+	}()
+
+	return dataCh, errCh
+
+}