Created
February 17, 2019 21:35
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Test for SO question 54638963
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package com.dataflow.samples; | |
import java.time.Instant; | |
import java.util.ArrayList; | |
import java.util.List; | |
import org.apache.beam.sdk.Pipeline; | |
import org.apache.beam.sdk.io.gcp.bigquery.BigQueryIO; | |
import org.apache.beam.sdk.io.gcp.bigquery.BigQueryIO.Write.Method; | |
import org.apache.beam.sdk.io.TextIO; | |
import org.apache.beam.sdk.options.Default; | |
import org.apache.beam.sdk.options.Description; | |
import org.apache.beam.sdk.options.PipelineOptions; | |
import org.apache.beam.sdk.options.PipelineOptionsFactory; | |
import org.apache.beam.sdk.transforms.DoFn; | |
import org.apache.beam.sdk.transforms.ParDo; | |
import com.google.api.services.bigquery.model.TableFieldSchema; | |
import com.google.api.services.bigquery.model.TableRow; | |
import com.google.api.services.bigquery.model.TableSchema; | |
public class NonStandardDelimiters { | |
public static interface MyOptions extends PipelineOptions { | |
@Description("Output BigQuery table <PROJECT_ID>:<DATASET>.<TABLE>") | |
String getOutput(); | |
void setOutput(String s); | |
@Description("Input file, gs://path/to/file") | |
String getInput(); | |
void setInput(String s); | |
} | |
@SuppressWarnings("serial") | |
public static void main(String[] args) { | |
MyOptions options = PipelineOptionsFactory.fromArgs(args).withValidation().as(MyOptions.class); | |
Pipeline p = Pipeline.create(options); | |
String file = options.getInput(); | |
String output = options.getOutput(); | |
// Build the table schema for the output table. | |
List<TableFieldSchema> fields = new ArrayList<>(); | |
fields.add(new TableFieldSchema().setName("data").setType("STRING")); | |
TableSchema schema = new TableSchema().setFields(fields); | |
p | |
.apply("GetMessages", TextIO.read().from(file)) | |
.apply("ExtractRows", ParDo.of(new DoFn<String, String>() { | |
@ProcessElement | |
public void processElement(ProcessContext c) { | |
for (String line : c.element().split("\\\\x01\\\\n")) { | |
if (!line.isEmpty()) { | |
c.output(line); | |
} | |
} | |
} | |
})) | |
.apply("ToBQRow", ParDo.of(new DoFn<String, TableRow>() { | |
@ProcessElement | |
public void processElement(ProcessContext c) throws Exception { | |
TableRow row = new TableRow(); | |
row.set("data", c.element()); | |
c.output(row); | |
} | |
})) | |
.apply(BigQueryIO.writeTableRows().to(output) | |
.withSchema(schema) | |
.withMethod(Method.FILE_LOADS) | |
.withWriteDisposition(BigQueryIO.Write.WriteDisposition.WRITE_TRUNCATE) | |
.withCreateDisposition(BigQueryIO.Write.CreateDisposition.CREATE_IF_NEEDED)); | |
p.run(); | |
} | |
} |
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