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feat: new sample - Tables: Copy multiple tables (#76)
* feat: new sample - Tables: Copy multiple tables

b/147141782

* update test to create new destination table for each test since existing table cannot be overwritten and would throw bigquery error

* add env vars for sample test builds

* update testing var names

* format code
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stephaniewang526 committed Jan 3, 2020
1 parent fd2dcf8 commit 2476419df9be7b2f52cdd098383c0622c669d046
@@ -30,7 +30,10 @@ mvn -v
# Setup required env variables
export GOOGLE_CLOUD_PROJECT=java-docs-samples-testing
export GOOGLE_APPLICATION_CREDENTIALS=${KOKORO_GFILE_DIR}/service-acct.json
export BIGQUERY_DATASET_NAME=bigquery_test_dataset
export GCS_BUCKET=java-docs-samples-testing
export BIGQUERY_TABLE1=table1
export BIGQUERY_TABLE2=table2

# Activate service account
gcloud auth activate-service-account \
@@ -0,0 +1,76 @@
/*
* Copyright 2019 Google LLC
*
* 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.
*/

package com.example.bigquery;

// [START bigquery_copy_table_multiple_source]
import com.google.cloud.bigquery.BigQuery;
import com.google.cloud.bigquery.BigQueryException;
import com.google.cloud.bigquery.BigQueryOptions;
import com.google.cloud.bigquery.CopyJobConfiguration;
import com.google.cloud.bigquery.Job;
import com.google.cloud.bigquery.JobInfo;
import com.google.cloud.bigquery.TableId;
import java.util.Arrays;

public class CopyMultipleTables {

public static void runCopyMultipleTables() {
// TODO(developer): Replace these variables before running the sample.
String destinationDatasetName = "MY_DATASET_NAME";
String destinationTableId = "MY_TABLE_NAME";
copyMultipleTables(destinationDatasetName, destinationTableId);
}

public static void copyMultipleTables(String destinationDatasetName, String destinationTableId) {
try {
// 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 destinationTable = TableId.of(destinationDatasetName, destinationTableId);

// For more information on CopyJobConfiguration see:
// https://googleapis.dev/java/google-cloud-clients/latest/com/google/cloud/bigquery/JobConfiguration.html
CopyJobConfiguration configuration =
CopyJobConfiguration.newBuilder(
destinationTable,
Arrays.asList(
TableId.of(destinationDatasetName, "table1"),
TableId.of(destinationDatasetName, "table2")))
.build();

// For more information on Job see:
// https://googleapis.dev/java/google-cloud-clients/latest/index.html?com/google/cloud/bigquery/package-summary.html
Job job = bigquery.create(JobInfo.of(configuration));

// Blocks until this job completes its execution, either failing or succeeding.
Job completedJob = job.waitFor();
if (completedJob == null) {
System.out.println("Job not executed since it no longer exists.");
return;
} else if (completedJob.getStatus().getError() != null) {
System.out.println(
"BigQuery was unable to copy tables due to an error: \n" + job.getStatus().getError());
return;
}
System.out.println("Table copied successfully.");
} catch (BigQueryException | InterruptedException e) {
System.out.println("Table copying job was interrupted. \n" + e.toString());
}
}
}
// [END bigquery_copy_table_multiple_source]
@@ -0,0 +1,73 @@
/*
* Copyright 2020 Google LLC
*
* 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.
*/

package com.example.bigquery;

import static com.google.common.truth.Truth.assertThat;
import static junit.framework.TestCase.assertNotNull;

import java.io.ByteArrayOutputStream;
import java.io.PrintStream;
import java.util.UUID;
import org.junit.After;
import org.junit.Before;
import org.junit.BeforeClass;
import org.junit.Test;

public class CopyMultipleTablesIT {
private ByteArrayOutputStream bout;
private PrintStream out;

private static final String BIGQUERY_DATASET_NAME = System.getenv("BIGQUERY_DATASET_NAME");
private static final String BIGQUERY_TABLE1 = System.getenv("BIGQUERY_TABLE1");
private static final String BIGQUERY_TABLE2 = System.getenv("BIGQUERY_TABLE2");

private static void requireEnvVar(String varName) {
assertNotNull(
"Environment variable " + varName + " is required to perform these tests.",
System.getenv(varName));
}

@BeforeClass
public static void checkRequirements() {
requireEnvVar("BIGQUERY_DATASET_NAME");
requireEnvVar("BIGQUERY_TABLE1");
requireEnvVar("BIGQUERY_TABLE2");
}

@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 testCopyMultipleTables() {
// Create a new destination table for each test since existing table cannot be overwritten
String generatedTableName =
"gcloud_test_table_temp_" + UUID.randomUUID().toString().replace('-', '_');
CreateTable.createTable(BIGQUERY_DATASET_NAME, generatedTableName, null);

CopyMultipleTables.copyMultipleTables(BIGQUERY_DATASET_NAME, generatedTableName);
assertThat(bout.toString()).contains("Table copied successfully.");
}
}
@@ -61,7 +61,6 @@ public void testExtractTableToJson() {
String datasetName = "samples";
String tableName = "shakespeare";
String destinationUri = "gs://" + GCS_BUCKET + "/extractTest.csv";
System.out.println(destinationUri);

// Extract table content to GCS in CSV format
ExtractTableToJson.extractTableToJson(projectId, datasetName, tableName, destinationUri);

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