org.openmrs.util.databasechange.CreateCodedOrderFrequencyForDrugOrderFrequencyChangeset.java Source code

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Here is the source code for org.openmrs.util.databasechange.CreateCodedOrderFrequencyForDrugOrderFrequencyChangeset.java

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/**
 * This Source Code Form is subject to the terms of the Mozilla Public License,
 * v. 2.0. If a copy of the MPL was not distributed with this file, You can
 * obtain one at http://mozilla.org/MPL/2.0/. OpenMRS is also distributed under
 * the terms of the Healthcare Disclaimer located at http://openmrs.org/license.
 *
 * Copyright (C) OpenMRS Inc. OpenMRS is a registered trademark and the OpenMRS
 * graphic logo is a trademark of OpenMRS Inc.
 */
package org.openmrs.util.databasechange;

import liquibase.change.custom.CustomTaskChange;
import liquibase.database.Database;
import liquibase.database.jvm.JdbcConnection;
import liquibase.exception.CustomChangeException;
import liquibase.exception.DatabaseException;
import liquibase.exception.SetupException;
import liquibase.exception.ValidationErrors;
import liquibase.resource.ResourceAccessor;

import org.apache.commons.lang3.StringUtils;
import org.openmrs.util.DatabaseUtil;
import org.openmrs.util.UpgradeUtil;

import java.sql.Date;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import java.util.Set;
import java.util.UUID;

public class CreateCodedOrderFrequencyForDrugOrderFrequencyChangeset implements CustomTaskChange {

    @Override
    public void execute(Database database) throws CustomChangeException {
        JdbcConnection connection = (JdbcConnection) database.getConnection();

        try {
            Set<String> uniqueFrequencies = DatabaseUtil.getUniqueNonNullColumnValues("frequency_text",
                    "drug_order", String.class, connection.getUnderlyingConnection());
            insertUniqueFrequencies(connection, uniqueFrequencies);
        } catch (Exception e) {
            throw new CustomChangeException(e);
        }
    }

    private void insertUniqueFrequencies(JdbcConnection connection, Set<String> uniqueFrequencies)
            throws CustomChangeException, SQLException, DatabaseException {
        PreparedStatement insertOrderFrequencyStatement = null;
        Boolean autoCommit = null;
        try {
            autoCommit = connection.getAutoCommit();
            connection.setAutoCommit(false);
            insertOrderFrequencyStatement = connection.prepareStatement("insert into order_frequency "
                    + "(concept_id, creator, date_created, retired, uuid) values (?, ?, ?, ?, ?)");

            Date date = new Date(new java.util.Date().getTime());

            for (String frequency : uniqueFrequencies) {
                if (StringUtils.isBlank(frequency)) {
                    continue;
                }

                Integer conceptIdForFrequency = UpgradeUtil.getConceptIdForUnits(frequency);
                if (conceptIdForFrequency == null) {
                    throw new CustomChangeException("No concept mapping found for frequency: " + frequency);
                }

                Integer orderFrequencyId = UpgradeUtil.getOrderFrequencyIdForConceptId(
                        connection.getUnderlyingConnection(), conceptIdForFrequency);
                if (orderFrequencyId != null) {
                    //a single concept is mapped to more than one text or there is an order frequency already
                    continue;
                }

                //Generating UUID for order frequency. Generated UUIDs will be the same if concepts UUIDs are the same.
                String uuid = UpgradeUtil.getConceptUuid(connection.getUnderlyingConnection(),
                        conceptIdForFrequency);
                uuid += "-6925ebb0-7c69-11e3-baa7-0800200c9a66"; //Adding random value for order frequency
                uuid = UUID.nameUUIDFromBytes(uuid.getBytes()).toString();

                insertOrderFrequencyStatement.setInt(1, conceptIdForFrequency);
                insertOrderFrequencyStatement.setInt(2, 1);
                insertOrderFrequencyStatement.setDate(3, date);
                insertOrderFrequencyStatement.setBoolean(4, false);
                insertOrderFrequencyStatement.setString(5, uuid);

                insertOrderFrequencyStatement.executeUpdate();
                insertOrderFrequencyStatement.clearParameters();
            }
            connection.commit();
        } catch (DatabaseException e) {
            handleError(connection, e);
        } catch (SQLException e) {
            handleError(connection, e);
        } finally {
            if (autoCommit != null) {
                connection.setAutoCommit(autoCommit);
            }
            if (insertOrderFrequencyStatement != null) {
                insertOrderFrequencyStatement.close();
            }
        }
    }

    private void handleError(JdbcConnection connection, Exception e)
            throws DatabaseException, CustomChangeException {
        connection.rollback();
        throw new CustomChangeException(e);
    }

    @Override
    public String getConfirmationMessage() {
        return "Finished creating coded order frequencies for drug order frequencies";
    }

    @Override
    public void setUp() throws SetupException {
    }

    @Override
    public void setFileOpener(ResourceAccessor resourceAccessor) {
    }

    @Override
    public ValidationErrors validate(Database database) {
        return null;
    }
}