/*
* Copyright 1999-2015 dangdang.com.
* <p>
* 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.
* </p>
*/
package com.dangdang.ddframe.rdb.sharding.example.jdbc.masterslave;
import com.dangdang.ddframe.rdb.sharding.api.HintManager;
import com.dangdang.ddframe.rdb.sharding.api.MasterSlaveDataSourceFactory;
import com.dangdang.ddframe.rdb.sharding.api.rule.BindingTableRule;
import com.dangdang.ddframe.rdb.sharding.api.rule.DataSourceRule;
import com.dangdang.ddframe.rdb.sharding.api.rule.ShardingRule;
import com.dangdang.ddframe.rdb.sharding.api.rule.TableRule;
import com.dangdang.ddframe.rdb.sharding.api.strategy.database.DatabaseShardingStrategy;
import com.dangdang.ddframe.rdb.sharding.api.strategy.table.TableShardingStrategy;
import com.dangdang.ddframe.rdb.sharding.example.jdbc.masterslave.algorithm.ModuloDatabaseShardingAlgorithm;
import com.dangdang.ddframe.rdb.sharding.example.jdbc.masterslave.algorithm.ModuloTableShardingAlgorithm;
import com.dangdang.ddframe.rdb.sharding.jdbc.ShardingDataSource;
import org.apache.commons.dbcp.BasicDataSource;
import javax.sql.DataSource;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.Arrays;
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;
public final class Main {
// CHECKSTYLE:OFF
public static void main(final String[] args) throws SQLException {
// CHECKSTYLE:ON
DataSource dataSource = getShardingDataSource();
printSimpleSelect(dataSource);
System.out.println("--------------");
printGroupBy(dataSource);
System.out.println("--------------");
printHintSimpleSelect(dataSource);
}
private static void printSimpleSelect(final DataSource dataSource) throws SQLException {
String sql = "SELECT i.* FROM t_order o JOIN t_order_item i ON o.order_id=i.order_id WHERE o.user_id=? AND o.order_id=?";
try (
Connection conn = dataSource.getConnection();
PreparedStatement preparedStatement = conn.prepareStatement(sql)) {
preparedStatement.setInt(1, 10);
preparedStatement.setInt(2, 1001);
try (ResultSet rs = preparedStatement.executeQuery()) {
while (rs.next()) {
System.out.println(rs.getInt(1));
System.out.println(rs.getInt(2));
System.out.println(rs.getInt(3));
}
}
}
}
private static void printGroupBy(final DataSource dataSource) throws SQLException {
String sql = "SELECT o.user_id, COUNT(*) FROM t_order o JOIN t_order_item i ON o.order_id=i.order_id GROUP BY o.user_id";
try (
Connection conn = dataSource.getConnection();
PreparedStatement preparedStatement = conn.prepareStatement(sql)
) {
ResultSet rs = preparedStatement.executeQuery();
while (rs.next()) {
System.out.println("user_id: " + rs.getInt(1) + ", count: " + rs.getInt(2));
}
}
}
private static void printHintSimpleSelect(final DataSource dataSource) throws SQLException {
String sql = "SELECT i.* FROM t_order o JOIN t_order_item i ON o.order_id=i.order_id";
try (
HintManager hintManager = HintManager.getInstance();
Connection conn = dataSource.getConnection();
PreparedStatement preparedStatement = conn.prepareStatement(sql)) {
hintManager.addDatabaseShardingValue("t_order", "user_id", 10);
hintManager.addTableShardingValue("t_order", "order_id", 1001);
try (ResultSet rs = preparedStatement.executeQuery()) {
while (rs.next()) {
System.out.println(rs.getInt(1));
System.out.println(rs.getInt(2));
System.out.println(rs.getInt(3));
}
}
}
}
private static ShardingDataSource getShardingDataSource() {
DataSourceRule dataSourceRule = new DataSourceRule(createDataSourceMap());
TableRule orderTableRule = TableRule.builder("t_order").actualTables(Arrays.asList("t_order_0", "t_order_1")).dataSourceRule(dataSourceRule).build();
TableRule orderItemTableRule = TableRule.builder("t_order_item").actualTables(Arrays.asList("t_order_item_0", "t_order_item_1")).dataSourceRule(dataSourceRule).build();
ShardingRule shardingRule = ShardingRule.builder().dataSourceRule(dataSourceRule).tableRules(Arrays.asList(orderTableRule, orderItemTableRule))
.bindingTableRules(Collections.singletonList(new BindingTableRule(Arrays.asList(orderTableRule, orderItemTableRule))))
.databaseShardingStrategy(new DatabaseShardingStrategy("user_id", new ModuloDatabaseShardingAlgorithm()))
.tableShardingStrategy(new TableShardingStrategy("order_id", new ModuloTableShardingAlgorithm())).build();
return new ShardingDataSource(shardingRule);
}
private static Map<String, DataSource> createDataSourceMap() {
Map<String, DataSource> result = new HashMap<>(2);
result.put("ds_0", MasterSlaveDataSourceFactory.createDataSource("ds_0", createDataSource("ds_0_master"), createDataSource("ds_0_slave_0"), createDataSource("ds_0_slave_1")));
result.put("ds_1", MasterSlaveDataSourceFactory.createDataSource("ds_1", createDataSource("ds_1_master"), createDataSource("ds_1_slave_0"), createDataSource("ds_1_slave_1")));
return result;
}
private static DataSource createDataSource(final String dataSourceName) {
BasicDataSource result = new BasicDataSource();
result.setDriverClassName(com.mysql.jdbc.Driver.class.getName());
result.setUrl(String.format("jdbc:mysql://localhost:3306/%s", dataSourceName));
result.setUsername("root");
result.setPassword("");
return result;
}
}