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package java.sql;

A builder created from a DataSource or XADataSource object, used to create a ShardingKey with sub-keys of supported data types. Implementations must support JDBCType.VARCHAR and may also support additional data types.

The following example illustrates the use of ShardingKeyBuilder to create a ShardingKey:


    DataSource ds = new MyDataSource();
    ShardingKey shardingKey = ds.createShardingKeyBuilder()
                          .subkey("abc", JDBCType.VARCHAR)
                          .subkey(94002, JDBCType.INTEGER)
                          .build();
 
Since:9
/** * A builder created from a {@code DataSource} or {@code XADataSource} object, * used to create a {@link ShardingKey} with sub-keys of supported data types. * Implementations must * support JDBCType.VARCHAR and may also support additional data types. * <p> * The following example illustrates the use of {@code ShardingKeyBuilder} to * create a {@link ShardingKey}: * <pre> * {@code * * DataSource ds = new MyDataSource(); * ShardingKey shardingKey = ds.createShardingKeyBuilder() * .subkey("abc", JDBCType.VARCHAR) * .subkey(94002, JDBCType.INTEGER) * .build(); * } * </pre> * * @since 9 */
public interface ShardingKeyBuilder {
This method will be called to add a subkey into a Sharding Key object being built. The order in which subkey method is called is important as it indicates the order of placement of the subkey within the Sharding Key.
Params:
  • subkey – contains the object that needs to be part of shard sub key
  • subkeyType – sub-key data type of type java.sql.SQLType
Returns:this builder object
/** * This method will be called to add a subkey into a Sharding Key object being * built. The order in which subkey method is called is important as it * indicates the order of placement of the subkey within the Sharding Key. * * @param subkey contains the object that needs to be part of shard sub key * @param subkeyType sub-key data type of type java.sql.SQLType * @return this builder object */
ShardingKeyBuilder subkey(Object subkey, SQLType subkeyType);
Returns an instance of the object defined by this builder.
Throws:
Returns:The built object
/** * Returns an instance of the object defined by this builder. * * @return The built object * @throws java.sql.SQLException If an error occurs building the object */
ShardingKey build() throws SQLException; }