strongduanmu edited a comment on issue #10699:
URL:
https://github.com/apache/shardingsphere/issues/10699#issuecomment-858515798
Hi @stelin, I used the version `4.1.1` of `Sharding-JDBC` to test the Hint
feature, and there is no problems. The following is my test demo.
```java
public class HintTest {
public static void main(String[] args) throws SQLException {
DataSource dataSource = new HintTest().getShardingDataSource();
Connection connection = dataSource.getConnection();
PreparedStatement preparedStatement =
connection.prepareStatement("SELECT * FROM t_order");
HintManager.getInstance().setDatabaseShardingValue(1);
ResultSet resultSet = preparedStatement.executeQuery();
while (resultSet.next()) {
System.out.println(resultSet.getString("ORDER_ID") + " " +
resultSet.getString("USER_ID"));
}
HintManager.getInstance().close();
resultSet.close();
preparedStatement.close();
connection.close();
}
private DataSource getShardingDataSource() throws SQLException {
ShardingRuleConfiguration shardingRuleConfig = new
ShardingRuleConfiguration();
shardingRuleConfig.getTableRuleConfigs().add(getOrderTableRuleConfiguration());
shardingRuleConfig.getTableRuleConfigs().add(getOrderItemTableRuleConfiguration());
shardingRuleConfig.getBindingTableGroups().add("t_order,
t_order_item");
shardingRuleConfig.getBroadcastTables().add("t_config");
shardingRuleConfig.setDefaultDatabaseShardingStrategyConfig(new
HintShardingStrategyConfiguration(new AnnotationHintShardingAlgorithm()));
shardingRuleConfig.setDefaultTableShardingStrategyConfig(new
InlineShardingStrategyConfiguration("order_id", "ds_${order_id % 2}"));
Properties props = new Properties();
props.setProperty("sql.show", "true");
return
ShardingDataSourceFactory.createDataSource(createDataSourceMap(),
shardingRuleConfig, props);
}
private static KeyGeneratorConfiguration getKeyGeneratorConfiguration() {
KeyGeneratorConfiguration result = new
KeyGeneratorConfiguration("SNOWFLAKE", "order_id");
return result;
}
TableRuleConfiguration getOrderTableRuleConfiguration() {
TableRuleConfiguration result = new
TableRuleConfiguration("t_order", "ds_${0..1}.t_order_${0..1}");
result.setKeyGeneratorConfig(getKeyGeneratorConfiguration());
return result;
}
TableRuleConfiguration getOrderItemTableRuleConfiguration() {
TableRuleConfiguration result = new
TableRuleConfiguration("t_order_item", "ds_${0..1}.t_order_item_${0..1}");
return result;
}
Map<String, DataSource> createDataSourceMap() {
Map<String, DataSource> result = new HashMap<>();
result.put("ds_0", DataSourceUtil.createDataSource("demo_ds_0"));
result.put("ds_1", DataSourceUtil.createDataSource("demo_ds_1"));
return result;
}
}
```
public final class DataSourceUtil {
private static final String HOST = "localhost";
private static final int PORT = 3306;
private static final String USER_NAME = "root";
private static final String PASSWORD = "123456";
public static DataSource createDataSource(final String dataSourceName) {
HikariDataSource result = new HikariDataSource();
result.setDriverClassName(com.mysql.jdbc.Driver.class.getName());
result.setJdbcUrl(String.format("jdbc:mysql://%s:%s/%s?serverTimezone=UTC&useSSL=false&useUnicode=true&characterEncoding=UTF-8",
HOST, PORT, dataSourceName));
result.setUsername(USER_NAME);
result.setPassword(PASSWORD);
return result;
}
}
public class AnnotationHintShardingAlgorithm implements
HintShardingAlgorithm<Integer> {
@Override
public Collection<String> doSharding(final Collection<String>
availableTargetNames, final HintShardingValue<Integer> shardingValue) {
for (String each : availableTargetNames) {
if
(each.endsWith(String.valueOf(shardingValue.getValues().iterator().next() %
2))) {
return Collections.singletonList(each);
}
}
return null;
}
}
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