我正在try 读取来自PubSub的消息,然后写入数据流中的BigQuery表.然而,通过使用直接流道,我遇到了"无根单位"的错误.
以下是我的代码;
package main
import (
"context"
"encoding/json"
"flag"
"fmt"
"github.com/apache/beam/sdks/v2/go/pkg/beam/io/bigqueryio"
"github.com/apache/beam/sdks/v2/go/pkg/beam/x/debug"
"github.com/apache/beam/sdks/v2/go/pkg/beam"
"github.com/apache/beam/sdks/v2/go/pkg/beam/io/pubsubio"
"github.com/apache/beam/sdks/v2/go/pkg/beam/log"
"github.com/apache/beam/sdks/v2/go/pkg/beam/x/beamx"
)
type DummyBody struct {
TaskId string `json:"id" bigquery:"id"`
}
func buildPipeline(s beam.Scope) {
rawDummyBodies := pubsubio.Read(s, "project", "topic", &pubsubio.ReadOptions{Subscription: "sub.ID"})
dummyBodies := beam.ParDo(s, func(ctx context.Context, data []byte) (DummyBody, error) {
var body DummyBody
if err := json.Unmarshal(data, &body); err != nil {
log.Error(ctx, err)
fmt.Println("Error")
return body, err
}
fmt.Println("No Error")
return body, nil
}, rawDummyBodies)
debug.Printf(s, "Task : %#v", dummyBodies)
bigqueryio.Write(s, "project", "table", dummyBodies)
}
func main() {
flag.Parse()
beam.Init()
p, s := beam.NewPipelineWithRoot()
buildPipeline(s)
ctx := context.Background()
if err := beamx.Run(ctx, p); err != nil {
log.Exitf(ctx, "Failed to execute pipeline: %v", err)
}
}
管道开始使用直接运行器执行,但由于没有根单元而失败.
2022/11/01 14:29:55无法执行管道:转换失败 由以下原因引起: 无根单位 退出状态%1