throw exception when data source build failure

package io.shardingsphere.proxy.backend.jdbc.datasource;

import io.shardingsphere.core.constant.transaction.TransactionType;

import io.shardingsphere.core.exception.ShardingException;

import io.shardingsphere.core.rule.DataSourceParameter;

import io.shardingsphere.proxy.backend.BackendDataSource;

import lombok.Getter;

import lombok.extern.slf4j.Slf4j;

import javax.sql.DataSource;

import java.sql.Connection;

 * @author zhangliang

 */

@Getter

@Slf4j

public final class JDBCBackendDataSource implements BackendDataSource {

    private final Map<String, DataSource> dataSourceMap;

            // CHECKSTYLE:OFF

            } catch (final Exception ex) {

                // CHECKSTYLE:ON

                log.warn("Can not build {} failed with {}", entry.getKey(), ex);

                throw new ShardingException(String.format("Can not build data source, name is `%s`.", entry.getKey()), ex);

            }

        }

        return result;