refactor JDBCTransactionConfiguration & ProxyTransactionConfiguration

 * @author zhaojun

 */

@NoArgsConstructor(access = AccessLevel.PRIVATE)

public class JDBCTransactionConfiguration extends TransactionConfigurationAdapter {

public final class JDBCTransactionConfiguration extends TransactionConfigurationAdapter {

    private static final JDBCTransactionConfiguration CONFIG = new JDBCTransactionConfiguration();

    private static final JDBCTransactionConfiguration INSTANCE = new JDBCTransactionConfiguration();

    /**

     * Get singleton instance of {@code JDBCTransactionConfiguration}.

     * @return JDBC transaction configuration

     */

    public static JDBCTransactionConfiguration getInstance() {

        return CONFIG;

        return INSTANCE;

    }

    @Override

 * @author zhaojun

 */

@NoArgsConstructor(access = AccessLevel.PRIVATE)

public class ProxyTransactionConfiguration extends TransactionConfigurationAdapter {

public final class ProxyTransactionConfiguration extends TransactionConfigurationAdapter {

    private static final ProxyTransactionConfiguration CONFIG = new ProxyTransactionConfiguration();

    private static final ProxyTransactionConfiguration INSTANCE = new ProxyTransactionConfiguration();

    /**

     * Get singleton instance of {@code ProxyTransactionConfiguration}.

     * @return proxy transaction configuration

     */

    public static ProxyTransactionConfiguration getInstance() {

        return CONFIG;

        return INSTANCE;

    }

    @Override

import lombok.NoArgsConstructor;

/**

 * Create TransactionEvent for current thread.

 * Transaction event factory.

 *

 * @author zhaojun

 */