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

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Here is the source code for org.openmrs.util.databasechange.MigrateDrugOrderFrequencyToCodedOrderFrequencyChangeset.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.PreparedStatement;
import java.sql.SQLException;
import java.sql.Types;
import java.util.Set;

public class MigrateDrugOrderFrequencyToCodedOrderFrequencyChangeset 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());
            migrateFrequenciesToCodedValue(connection, uniqueFrequencies);
        } catch (Exception e) {
            throw new CustomChangeException(e);
        }
    }

    private void migrateFrequenciesToCodedValue(JdbcConnection connection, Set<String> uniqueFrequencies)
            throws CustomChangeException, SQLException, DatabaseException {
        PreparedStatement updateDrugOrderStatement = null;
        Boolean autoCommit = null;
        try {
            autoCommit = connection.getAutoCommit();
            connection.setAutoCommit(false);
            updateDrugOrderStatement = connection
                    .prepareStatement("update drug_order set frequency = ? where frequency_text = ?");

            updateDrugOrderStatement.setNull(1, Types.INTEGER);
            updateDrugOrderStatement.setNull(2, Types.VARCHAR);
            updateDrugOrderStatement.executeUpdate();
            updateDrugOrderStatement.clearParameters();

            for (String frequency : uniqueFrequencies) {
                if (StringUtils.isBlank(frequency)) {
                    updateDrugOrderStatement.setNull(1, Types.INTEGER);
                } else {
                    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) {
                        throw new CustomChangeException(
                                "No order frequency found for concept " + conceptIdForFrequency);
                    }

                    updateDrugOrderStatement.setInt(1, orderFrequencyId);
                }
                updateDrugOrderStatement.setString(2, frequency);
                updateDrugOrderStatement.executeUpdate();
                updateDrugOrderStatement.clearParameters();
            }
            connection.commit();
        } catch (DatabaseException e) {
            handleError(connection, e);
        } catch (SQLException e) {
            handleError(connection, e);
        } finally {
            if (autoCommit != null) {
                connection.setAutoCommit(autoCommit);
            }
            if (updateDrugOrderStatement != null) {
                updateDrugOrderStatement.close();
            }
        }
    }

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

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

    @Override
    public void setUp() throws SetupException {
    }

    @Override
    public void setFileOpener(ResourceAccessor resourceAccessor) {
    }

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