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Signed-off-by: coldWater <254244460@qq.com> Signed-off-by: Jiyong Huang <huangjy@emqx.io> Co-authored-by: coldWater <254244460@qq.com>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,105 @@ | ||
| // Copyright 2021-2024 EMQ Technologies Co., Ltd. | ||
| // | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
|
|
||
| //go:build parquet || full | ||
|
|
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| package reader | ||
|
|
||
| import ( | ||
| "errors" | ||
| "io" | ||
| "os" | ||
|
|
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| "github.com/parquet-go/parquet-go" | ||
|
|
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| "github.com/lf-edge/ekuiper/contract/v2/api" | ||
| "github.com/lf-edge/ekuiper/v2/pkg/modules" | ||
| ) | ||
|
|
||
| func init() { | ||
| modules.RegisterFileStreamReader("parquet", func(ctx api.StreamContext) modules.FileStreamReader { | ||
| return &ParquetReader{} | ||
| }) | ||
| } | ||
|
|
||
| type ParquetReader struct { | ||
| pf *parquet.File | ||
| groups []parquet.RowGroup | ||
| curGroup int | ||
| rowsReader parquet.Rows | ||
| } | ||
|
|
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| func (pr *ParquetReader) Provision(ctx api.StreamContext, props map[string]any) error { | ||
| return nil | ||
| } | ||
|
|
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| func (pr *ParquetReader) Bind(ctx api.StreamContext, fr io.Reader, _ int) (err error) { | ||
| f, ok := fr.(*os.File) | ||
| if !ok { | ||
| return errors.New("parquet reader needs a file") | ||
| } | ||
| info, err := f.Stat() | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
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| pr.pf, err = parquet.OpenFile(f, info.Size()) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| pr.groups = pr.pf.RowGroups() | ||
| return nil | ||
| } | ||
|
|
||
| func (pr *ParquetReader) Read(_ api.StreamContext) (any, error) { | ||
| var row [1]parquet.Row | ||
| for pr.curGroup < len(pr.groups) { | ||
| group := pr.groups[pr.curGroup] | ||
| if pr.rowsReader == nil { | ||
| pr.rowsReader = group.Rows() | ||
| } | ||
|
|
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| _, err := pr.rowsReader.ReadRows(row[:]) | ||
| switch { | ||
| case errors.Is(err, io.EOF): | ||
| pr.curGroup++ | ||
| err = pr.rowsReader.Close() | ||
| pr.rowsReader = nil | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| continue | ||
| case err != nil: | ||
| return nil, err | ||
| } | ||
|
|
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| m := make(map[string]any) | ||
| err = pr.pf.Schema().Reconstruct(&m, row[0]) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| return m, nil | ||
| } | ||
| return nil, io.EOF | ||
| } | ||
|
|
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| func (pr *ParquetReader) IsBytesReader() bool { | ||
| return false | ||
| } | ||
|
|
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| func (pr *ParquetReader) Close(_ api.StreamContext) error { | ||
| return nil | ||
| } | ||
|
|
||
| var _ modules.FileStreamReader = &ParquetReader{} |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,60 @@ | ||
| // Copyright 2024 EMQ Technologies Co., Ltd. | ||
| // | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
|
|
||
| //go:build parquet || full | ||
|
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| package file | ||
|
|
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| import ( | ||
| "os" | ||
| "path/filepath" | ||
| "testing" | ||
|
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| _ "github.com/lf-edge/ekuiper/v2/internal/io/file/reader" | ||
|
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| "github.com/lf-edge/ekuiper/contract/v2/api" | ||
| "github.com/lf-edge/ekuiper/v2/pkg/mock" | ||
| "github.com/lf-edge/ekuiper/v2/pkg/model" | ||
| "github.com/lf-edge/ekuiper/v2/pkg/timex" | ||
| ) | ||
|
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| func TestParquet(t *testing.T) { | ||
| path, err := os.Getwd() | ||
| if err != nil { | ||
| t.Fatal(err) | ||
| } | ||
| path = filepath.Join(path, "test") | ||
| meta := map[string]interface{}{ | ||
| "file": filepath.Join(path, "parquet", "simple.parq"), | ||
| } | ||
| mc := timex.Clock | ||
| exp := []api.MessageTuple{ | ||
| model.NewDefaultSourceTuple(map[string]interface{}{"id": int64(1), "name": "user1"}, meta, mc.Now()), | ||
| model.NewDefaultSourceTuple(map[string]interface{}{"id": int64(2), "name": "user2"}, meta, mc.Now()), | ||
| model.NewDefaultSourceTuple(map[string]interface{}{"id": int64(7), "name": "user7"}, meta, mc.Now()), | ||
| model.NewDefaultSourceTuple(map[string]interface{}{"id": int64(8), "name": "user8"}, meta, mc.Now()), | ||
| model.NewDefaultSourceTuple(map[string]interface{}{"id": int64(10), "name": "user10"}, meta, mc.Now()), | ||
| model.NewDefaultSourceTuple(map[string]interface{}{"id": int64(12), "name": "user12"}, meta, mc.Now()), | ||
| model.NewDefaultSourceTuple(map[string]interface{}{"id": int64(15), "name": "user15"}, meta, mc.Now()), | ||
| model.NewDefaultSourceTuple(map[string]interface{}{"id": int64(16), "name": "user16"}, meta, mc.Now()), | ||
| } | ||
| r := GetSource() | ||
| mock.TestSourceConnector(t, r, map[string]any{ | ||
| "fileType": "parquet", | ||
| "path": path, | ||
| "datasource": "parquet/simple.parq", | ||
| }, exp, func() { | ||
| // do nothing | ||
| }) | ||
| } |
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