/
DatabaseTimestampService.java
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/
DatabaseTimestampService.java
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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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 org.apache.shardingsphere.timeservice.type.database;
import org.apache.shardingsphere.infra.database.DatabaseTypeEngine;
import org.apache.shardingsphere.infra.database.core.spi.DatabaseTypedSPILoader;
import org.apache.shardingsphere.infra.database.core.type.DatabaseType;
import org.apache.shardingsphere.infra.datasource.pool.creator.DataSourcePoolCreator;
import org.apache.shardingsphere.infra.yaml.config.swapper.resource.YamlDataSourceConfigurationSwapper;
import org.apache.shardingsphere.timeservice.spi.TimestampService;
import org.apache.shardingsphere.timeservice.type.database.exception.DatetimeLoadingException;
import org.apache.shardingsphere.timeservice.type.database.provider.TimestampLoadingSQLProvider;
import javax.sql.DataSource;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Timestamp;
import java.util.Map.Entry;
import java.util.Properties;
import java.util.stream.Collectors;
/**
* Database timestamp service.
*/
public final class DatabaseTimestampService implements TimestampService {
private DataSource dataSource;
private DatabaseType storageType;
@Override
public void init(final Properties props) {
dataSource = DataSourcePoolCreator.create(new YamlDataSourceConfigurationSwapper().swapToDataSourcePoolProperties(
props.entrySet().stream().collect(Collectors.toMap(entry -> entry.getKey().toString(), Entry::getValue))));
storageType = DatabaseTypeEngine.getStorageType(dataSource);
}
@Override
public Timestamp getTimestamp() {
try {
return loadDatetime(dataSource, DatabaseTypedSPILoader.getService(TimestampLoadingSQLProvider.class, storageType).getTimestampLoadingSQL());
} catch (final SQLException ex) {
throw new DatetimeLoadingException(ex);
}
}
private Timestamp loadDatetime(final DataSource dataSource, final String datetimeLoadingSQL) throws SQLException {
try (
Connection connection = dataSource.getConnection();
PreparedStatement preparedStatement = connection.prepareStatement(datetimeLoadingSQL)) {
try (ResultSet resultSet = preparedStatement.executeQuery()) {
resultSet.next();
return (Timestamp) resultSet.getObject(1);
}
}
}
@Override
public String getType() {
return "Database";
}
}