forked from googleapis/java-bigquery
/
ExtractTableToJSONIT.java
76 lines (64 loc) · 2.62 KB
/
ExtractTableToJSONIT.java
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package com.example.bigquery;
import static com.google.common.truth.Truth.assertThat;
import com.google.cloud.bigquery.BigQuery;
import com.google.cloud.bigquery.BigQueryException;
import com.google.cloud.bigquery.BigQueryOptions;
import com.google.cloud.bigquery.Field;
import com.google.cloud.bigquery.LegacySQLTypeName;
import com.google.cloud.bigquery.Schema;
import com.google.cloud.bigquery.StandardTableDefinition;
import com.google.cloud.bigquery.Table;
import com.google.cloud.bigquery.TableDefinition;
import com.google.cloud.bigquery.TableId;
import com.google.cloud.bigquery.TableInfo;
import com.google.cloud.bigquery.testing.RemoteBigQueryHelper;
import java.io.ByteArrayOutputStream;
import java.io.PrintStream;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
public class ExtractTableToJSONIT {
private ByteArrayOutputStream bout;
private PrintStream out;
@Before
public void setUp() throws Exception {
bout = new ByteArrayOutputStream();
out = new PrintStream(bout);
System.setOut(out);
}
@After
public void tearDown() {
System.setOut(null);
}
@Test
public void testExtractTableToJSON() {
String generatedDatasetName = RemoteBigQueryHelper.generateDatasetName();
// Create a new dataset to create a new table in
CreateDataset.createDataset(generatedDatasetName);
// Create a new table to extract to GCS for
String tableName = "MY_TABLE_NAME";
Schema schema =
Schema.of(
Field.of("stringField", LegacySQLTypeName.STRING),
Field.of("booleanField", LegacySQLTypeName.BOOLEAN));
Table table = createTableHelper(generatedDatasetName, tableName, schema);
// Extract table content to GCS in CSV format
ExtractTableToJSON.extractTableToJSON(table, "CSV", "gs://my-bucket/extractTest.csv");
assertThat(bout.toString()).contains("Table extraction job completed successfully");
}
private static Table createTableHelper(String datasetName, String tableName, Schema schema) {
// Initialize client that will be used to send requests. This client only needs to be created
// once, and can be reused for multiple requests.
BigQuery bigquery = BigQueryOptions.getDefaultInstance().getService();
TableId tableId = TableId.of(datasetName, tableName);
TableDefinition tableDefinition = StandardTableDefinition.of(schema);
TableInfo tableInfo = TableInfo.newBuilder(tableId, tableDefinition).build();
try {
Table table = bigquery.create(tableInfo);
return table;
} catch (BigQueryException e) {
System.out.println("Table was not created. \n" + e.toString());
return null;
}
}
}