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NativeImageSpannerSample.java
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NativeImageSpannerSample.java
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/*
* Copyright 2022 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.spanner;
import com.google.cloud.spanner.DatabaseAdminClient;
import com.google.cloud.spanner.DatabaseClient;
import com.google.cloud.spanner.DatabaseId;
import com.google.cloud.spanner.InstanceAdminClient;
import com.google.cloud.spanner.ResultSet;
import com.google.cloud.spanner.Spanner;
import com.google.cloud.spanner.SpannerOptions;
/** Sample Spanner application compiled with Native Image. */
public class NativeImageSpannerSample {
private static final String TEST_INSTANCE_ID = "test-instance";
private static final String TEST_DATABASE_ID = "test-database";
/**
* Runs the Spanner sample application.
*
* <p>This application should be run with the Spanner emulator for testing purposes.
*/
public static void main(String[] args) throws Exception {
System.out.println("Running the Spanner Sample.");
SpannerOptions options = SpannerOptions.newBuilder().build();
Spanner spanner = options.getService();
// Setup the Spanner environment.
InstanceAdminClient instanceAdminClient = spanner.getInstanceAdminClient();
DatabaseAdminClient databaseAdminClient = spanner.getDatabaseAdminClient();
InstanceOperations.createTestInstance(
instanceAdminClient, options.getProjectId(), TEST_INSTANCE_ID);
DatabaseOperations.createDatabase(databaseAdminClient, TEST_INSTANCE_ID, TEST_DATABASE_ID);
// Insert data
DatabaseClient dbClient =
spanner.getDatabaseClient(
DatabaseId.of(options.getProjectId(), TEST_INSTANCE_ID, TEST_DATABASE_ID));
DatabaseOperations.insertUsingDml(dbClient);
DatabaseOperations.insertUsingMutation(dbClient);
// Run some queries.
ResultSet resultSet = DatabaseOperations.performRead(dbClient);
System.out.println("Singers Registered in Spanner:");
while (resultSet.next()) {
System.out.println(resultSet.getString("FirstName") + " " + resultSet.getString("LastName"));
}
if (DatabaseOperations.databaseExists(
databaseAdminClient, TEST_INSTANCE_ID, TEST_DATABASE_ID)) {
DatabaseOperations.deleteDatabase(dbClient);
}
}
}