org.gridobservatory.greencomputing.dao.TimeseriesDao.java Source code

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Here is the source code for org.gridobservatory.greencomputing.dao.TimeseriesDao.java

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/**
 * Copyright (C) 2013 Alessandro <alessandro dot leite at alessandro dot cc>
 *
 * 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 org.gridobservatory.greencomputing.dao;

import java.math.BigDecimal;
import java.math.BigInteger;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import java.sql.Timestamp;
import java.sql.Types;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

import org.gridobservatory.greencomputing.xml.types.TimeseriesAcquisitionType;
import org.gridobservatory.greencomputing.xml.types.TimeseriesType;
import org.springframework.jdbc.core.BatchPreparedStatementSetter;
import org.springframework.jdbc.core.PreparedStatementCreator;
import org.springframework.jdbc.core.PreparedStatementCreatorFactory;
import org.springframework.jdbc.support.GeneratedKeyHolder;
import org.springframework.jdbc.support.KeyHolder;

public abstract class TimeseriesDao<T extends TimeseriesType> extends DaoSupport {

    private ExecutorService executor = Executors.newCachedThreadPool();

    public BigInteger insert(T timeseriesType) {
        KeyHolder keyHolder = new GeneratedKeyHolder();

        PreparedStatementCreatorFactory preparedStatementCreatorFactory = new PreparedStatementCreatorFactory(
                "insert into time_series (constant_value,start_date,end_date,acquisition_count ) "
                        + "values (?, ?, ?, ?)",
                new int[] { Types.VARCHAR, Types.TIMESTAMP, Types.TIMESTAMP, Types.BIGINT });

        PreparedStatementCreator newPreparedStatementCreator = preparedStatementCreatorFactory
                .newPreparedStatementCreator(new Object[] {
                        timeseriesType.getConstantValue() != null ? timeseriesType.getConstantValue().getValue()
                                : "",
                        new Date(timeseriesType.getStartDate().longValue() * 1000),
                        new Date(timeseriesType.getEndDate().longValue() * 1000),
                        timeseriesType.getAcquisitionCount() });

        preparedStatementCreatorFactory.setReturnGeneratedKeys(true);
        this.getJdbcTemplate().update(newPreparedStatementCreator, keyHolder);
        BigInteger timeSeriesId = BigInteger.valueOf(keyHolder.getKey().longValue());

        insertTimeSeriesAcquisitions(timeSeriesId, timeseriesType.getA());

        return timeSeriesId;
    }

    public List<BigInteger> insert(Iterable<T> timeseries) {
        List<BigInteger> ids = new ArrayList<>();
        for (T timeseriesType : timeseries) {
            ids.add(this.insert(timeseriesType));
        }
        return ids;
    }

    protected void insertTimeSeriesAcquisitions(final BigInteger timeSeriesId,
            final List<TimeseriesAcquisitionType> acquisitions) {
        executor.submit(new Runnable() {
            @Override
            public void run() {
                if (acquisitions != null) {
                    getJdbcTemplate().batchUpdate(
                            "insert into time_series_acquisition (time_series_id, ts, value) values (?,?,?)",
                            new BatchPreparedStatementSetter() {

                                @Override
                                public void setValues(PreparedStatement ps, int i) throws SQLException {
                                    ps.setLong(1, timeSeriesId.longValue());
                                    long dateInMilis = acquisitions.get(i).getTs()
                                            .multiply(BigInteger.valueOf(1000l)).longValue();
                                    ps.setTimestamp(2, new Timestamp(dateInMilis));
                                    ps.setBigDecimal(3, new BigDecimal(acquisitions.get(i).getV()));
                                }

                                @Override
                                public int getBatchSize() {
                                    return acquisitions.size();
                                }
                            });
                }
            }
        });
    }
}