cherry.foundation.etl.ExtractorImpl.java Source code

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Here is the source code for cherry.foundation.etl.ExtractorImpl.java

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/*
 * Copyright 2012,2015 agwlvssainokuni
 *
 * 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.
 */

package cherry.foundation.etl;

import java.io.IOException;
import java.util.Map;

import javax.sql.DataSource;

import org.springframework.jdbc.core.ResultSetExtractor;
import org.springframework.jdbc.core.namedparam.NamedParameterJdbcTemplate;

/**
 * 
 */
public class ExtractorImpl implements Extractor {

    /**
     * ?
     * 
     * @param dataSource 
     * @param sql SQL
     * @param paramMap ?
     * @param consumer ??
     * @param limiter ?
     * @return ????
     * @throws LimiterException ??
     * @throws IOException ?
     */
    @Override
    public long extract(DataSource dataSource, String sql, Map<String, ?> paramMap, Consumer consumer,
            Limiter limiter) throws LimiterException, IOException {

        NamedParameterJdbcTemplate template = new NamedParameterJdbcTemplate(dataSource);
        ResultSetExtractor<Long> extractor = new ExtractorResultSetExtractor(consumer, limiter);

        limiter.start();
        try {
            return template.query(sql, paramMap, extractor);
        } catch (IllegalStateException ex) {
            throw (IOException) ex.getCause();
        } finally {
            limiter.stop();
        }
    }

}