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docs(samples): add get connection (#156)
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Praful Makani committed Oct 7, 2020
1 parent a25731c commit 0cdb6ce95bcb22084dfaf6a562783466398a3847
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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.bigqueryconnection;

// [START bigqueryconnection_get_connection]
import com.google.cloud.bigquery.connection.v1.Connection;
import com.google.cloud.bigquery.connection.v1.ConnectionName;
import com.google.cloud.bigquery.connection.v1.GetConnectionRequest;
import com.google.cloud.bigqueryconnection.v1.ConnectionServiceClient;
import java.io.IOException;

// Sample to get connection
public class GetConnection {

public static void main(String[] args) throws IOException {
// TODO(developer): Replace these variables before running the sample.
String projectId = "MY_PROJECT_ID";
String location = "MY_LOCATION";
String connectionId = "MY_CONNECTION_ID";
getConnection(projectId, location, connectionId);
}

public static void getConnection(String projectId, String location, String connectionId)
throws IOException {
try (ConnectionServiceClient client = ConnectionServiceClient.create()) {
ConnectionName name = ConnectionName.of(projectId, location, connectionId);
GetConnectionRequest request =
GetConnectionRequest.newBuilder().setName(name.toString()).build();
Connection response = client.getConnection(request);
System.out.println("Connection info retrieved successfully :" + response.getName());
}
}
}
// [END bigqueryconnection_get_connection]
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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.bigqueryconnection;

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

import com.google.cloud.bigquery.connection.v1.CloudSqlCredential;
import com.google.cloud.bigquery.connection.v1.CloudSqlProperties;
import com.google.cloud.bigquery.connection.v1.Connection;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.PrintStream;
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 GetConnectionIT {

private static final Logger LOG = Logger.getLogger(GetConnectionIT.class.getName());
private static final String LOCATION = "US";
private static final String REGION = "us-central1";
private static final String PROJECT_ID = requireEnvVar("GOOGLE_CLOUD_PROJECT");
private static final String MY_SQL_DATABASE = requireEnvVar("MY_SQL_DATABASE");
private static final String MY_SQL_INSTANCE = requireEnvVar("MY_SQL_INSTANCE");
private static final String DB_USER = requireEnvVar("DB_USER");
private static final String DB_PWD = requireEnvVar("DB_PWD");

private String connectionId;
private ByteArrayOutputStream bout;
private PrintStream out;
private PrintStream originalPrintStream;

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");
requireEnvVar("MY_SQL_DATABASE");
requireEnvVar("MY_SQL_INSTANCE");
requireEnvVar("DB_USER");
requireEnvVar("DB_PWD");
}

@Before
public void setUp() throws IOException {
bout = new ByteArrayOutputStream();
out = new PrintStream(bout);
originalPrintStream = System.out;
System.setOut(out);
// create a temporary connection
connectionId = "MY_CONNECTION_TEST_" + UUID.randomUUID().toString().substring(0, 8);
String instanceId = String.format("%s:%s:%s", PROJECT_ID, REGION, MY_SQL_INSTANCE);
CloudSqlCredential cloudSqlCredential =
CloudSqlCredential.newBuilder().setUsername(DB_USER).setPassword(DB_PWD).build();
CloudSqlProperties cloudSqlProperties =
CloudSqlProperties.newBuilder()
.setType(CloudSqlProperties.DatabaseType.MYSQL)
.setDatabase(MY_SQL_DATABASE)
.setInstanceId(instanceId)
.setCredential(cloudSqlCredential)
.build();
Connection connection = Connection.newBuilder().setCloudSql(cloudSqlProperties).build();
CreateConnection.createConnection(PROJECT_ID, LOCATION, connectionId, connection);
}

@After
public void tearDown() throws IOException {
// Clean up
DeleteConnection.deleteConnection(PROJECT_ID, LOCATION, connectionId);
// restores print statements in the original method
System.out.flush();
System.setOut(originalPrintStream);
LOG.log(Level.INFO, bout.toString());
}

@Test
public void testGetConnection() throws IOException {
GetConnection.getConnection(PROJECT_ID, LOCATION, connectionId);
assertThat(bout.toString()).contains("Connection info retrieved successfully :");
}
}

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