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docs(samples): add create scheduled query with service account (#322)
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Praful Makani committed Sep 3, 2020
1 parent b62ee9d commit 35552a60e2036a7767ed4caa39d71aa808f565d1
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/*
* 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.bigquerydatatransfer;

// [START bigquerydatatransfer_create_scheduled_query_with_service_account]
import com.google.api.gax.rpc.ApiException;
import com.google.cloud.bigquery.datatransfer.v1.CreateTransferConfigRequest;
import com.google.cloud.bigquery.datatransfer.v1.DataTransferServiceClient;
import com.google.cloud.bigquery.datatransfer.v1.ProjectName;
import com.google.cloud.bigquery.datatransfer.v1.TransferConfig;
import com.google.protobuf.Struct;
import com.google.protobuf.Value;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;

// Sample to create a scheduled query with service account
public class CreateScheduledQueryWithServiceAccount {

public static void main(String[] args) throws IOException {
// TODO(developer): Replace these variables before running the sample.
final String projectId = "MY_PROJECT_ID";
final String datasetId = "MY_DATASET_ID";
final String serviceAccount = "MY_SERVICE_ACCOUNT";
final String query =
"SELECT CURRENT_TIMESTAMP() as current_time, @run_time as intended_run_time, "
+ "@run_date as intended_run_date, 17 as some_integer";
Map<String, Value> params = new HashMap<>();
params.put("query", Value.newBuilder().setStringValue(query).build());
params.put(
"destination_table_name_template",
Value.newBuilder().setStringValue("my_destination_table_{run_date}").build());
params.put("write_disposition", Value.newBuilder().setStringValue("WRITE_TRUNCATE").build());
params.put("partitioning_field", Value.newBuilder().build());
TransferConfig transferConfig =
TransferConfig.newBuilder()
.setDestinationDatasetId(datasetId)
.setDisplayName("Your Scheduled Query Name")
.setDataSourceId("scheduled_query")
.setParams(Struct.newBuilder().putAllFields(params).build())
.setSchedule("every 24 hours")
.build();
createScheduledQueryWithServiceAccount(projectId, transferConfig, serviceAccount);
}

public static void createScheduledQueryWithServiceAccount(
String projectId, TransferConfig transferConfig, String serviceAccount) throws IOException {
try (DataTransferServiceClient dataTransferServiceClient = DataTransferServiceClient.create()) {
ProjectName parent = ProjectName.of(projectId);
CreateTransferConfigRequest request =
CreateTransferConfigRequest.newBuilder()
.setParent(parent.toString())
.setTransferConfig(transferConfig)
.setServiceAccountName(serviceAccount)
.build();
TransferConfig config = dataTransferServiceClient.createTransferConfig(request);
System.out.println(
"\nScheduled query with service account created successfully :" + config.getName());
} catch (ApiException ex) {
System.out.print("\nScheduled query with service account was not created." + ex.toString());
}
}
}
// [END bigquerydatatransfer_create_scheduled_query_with_service_account]
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/*
* 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.bigquerydatatransfer;

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

import com.google.auth.oauth2.ServiceAccountCredentials;
import com.google.cloud.bigquery.BigQuery;
import com.google.cloud.bigquery.BigQueryOptions;
import com.google.cloud.bigquery.DatasetInfo;
import com.google.cloud.bigquery.datatransfer.v1.TransferConfig;
import com.google.cloud.bigquery.datatransfer.v1.TransferState;
import com.google.protobuf.Struct;
import com.google.protobuf.Value;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.PrintStream;
import java.util.HashMap;
import java.util.Map;
import java.util.UUID;
import java.util.logging.Level;
import java.util.logging.Logger;
import org.junit.After;
import org.junit.Before;
import org.junit.BeforeClass;
import org.junit.Test;

public class CreateScheduledQueryWithServiceAccountIT {

private final Logger log = Logger.getLogger(this.getClass().getName());
private BigQuery bigquery;
private ByteArrayOutputStream bout;
private String name;
private String displayName;
private String datasetName;
private PrintStream out;
private PrintStream originalPrintStream;

private static final String PROJECT_ID = requireEnvVar("GOOGLE_CLOUD_PROJECT");

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

@BeforeClass
public static void checkRequirements() {
requireEnvVar("GOOGLE_CLOUD_PROJECT");
}

@Before
public void setUp() {
displayName = "MY_SCHEDULE_NAME_TEST_" + UUID.randomUUID().toString().substring(0, 8);
datasetName = "MY_DATASET_NAME_TEST_" + UUID.randomUUID().toString().substring(0, 8);
// create a temporary dataset
bigquery = BigQueryOptions.getDefaultInstance().getService();
bigquery.create(DatasetInfo.of(datasetName));

bout = new ByteArrayOutputStream();
out = new PrintStream(bout);
originalPrintStream = System.out;
System.setOut(out);
}

@After
public void tearDown() throws IOException {
// Clean up
DeleteScheduledQuery.deleteScheduledQuery(name);
// delete a temporary dataset
bigquery.delete(datasetName, BigQuery.DatasetDeleteOption.deleteContents());
// restores print statements in the original method
System.out.flush();
System.setOut(originalPrintStream);
log.log(Level.INFO, bout.toString());
}

@Test
public void testCreateScheduledQueryWithServiceAccount() throws IOException {
String query =
"SELECT CURRENT_TIMESTAMP() as current_time, @run_time as intended_run_time, "
+ "@run_date as intended_run_date, 17 as some_integer";
String destinationTableName =
"MY_DESTINATION_TABLE_" + UUID.randomUUID().toString().substring(0, 8) + "_{run_date}";
Map<String, Value> params = new HashMap<>();
params.put("query", Value.newBuilder().setStringValue(query).build());
params.put(
"destination_table_name_template",
Value.newBuilder().setStringValue(destinationTableName).build());
params.put("write_disposition", Value.newBuilder().setStringValue("WRITE_TRUNCATE").build());
params.put("partitioning_field", Value.newBuilder().setStringValue("").build());
TransferConfig transferConfig =
TransferConfig.newBuilder()
.setDestinationDatasetId(datasetName)
.setDisplayName(displayName)
.setDataSourceId("scheduled_query")
.setParams(Struct.newBuilder().putAllFields(params).build())
.setSchedule("every 24 hours")
.setState(TransferState.CANCELLED)
.build();
ServiceAccountCredentials credentials =
(ServiceAccountCredentials) ServiceAccountCredentials.getApplicationDefault();
CreateScheduledQueryWithServiceAccount.createScheduledQueryWithServiceAccount(
PROJECT_ID, transferConfig, credentials.getClientEmail());
String result = bout.toString();
name = result.substring(result.indexOf(":") + 1, result.length() - 1);
assertThat(result).contains("Scheduled query with service account created successfully");
}
}

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