001package ca.uhn.fhir.jpa.migrate.taskdef;
002
003/*-
004 * #%L
005 * HAPI FHIR Server - SQL Migration
006 * %%
007 * Copyright (C) 2014 - 2022 Smile CDR, Inc.
008 * %%
009 * Licensed under the Apache License, Version 2.0 (the "License");
010 * you may not use this file except in compliance with the License.
011 * You may obtain a copy of the License at
012 *
013 *      http://www.apache.org/licenses/LICENSE-2.0
014 *
015 * Unless required by applicable law or agreed to in writing, software
016 * distributed under the License is distributed on an "AS IS" BASIS,
017 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
018 * See the License for the specific language governing permissions and
019 * limitations under the License.
020 * #L%
021 */
022
023import ca.uhn.fhir.jpa.migrate.JdbcUtils;
024import org.apache.commons.lang3.Validate;
025import org.apache.commons.lang3.builder.EqualsBuilder;
026import org.apache.commons.lang3.builder.HashCodeBuilder;
027import org.slf4j.Logger;
028import org.slf4j.LoggerFactory;
029
030import java.sql.SQLException;
031import java.util.Set;
032import java.util.stream.Collectors;
033
034import static org.apache.commons.lang3.StringUtils.isNotBlank;
035
036public class AddIdGeneratorTask extends BaseTask {
037
038        private static final Logger ourLog = LoggerFactory.getLogger(AddIdGeneratorTask.class);
039        private final String myGeneratorName;
040
041        public AddIdGeneratorTask(String theProductVersion, String theSchemaVersion, String theGeneratorName) {
042                super(theProductVersion, theSchemaVersion);
043                myGeneratorName = theGeneratorName;
044        }
045
046        @Override
047        public void validate() {
048                Validate.notBlank(myGeneratorName);
049                setDescription("Add id generator " + myGeneratorName);
050        }
051
052        @Override
053        public void doExecute() throws SQLException {
054                Set<String> tableNames = JdbcUtils.getTableNames(getConnectionProperties());
055                String sql = null;
056
057                switch (getDriverType()) {
058                        case MARIADB_10_1:
059                        case MYSQL_5_7:
060                                // These require a separate table
061                                if (!tableNames.contains(myGeneratorName)) {
062
063                                        String creationSql = "create table " + myGeneratorName + " ( next_val bigint ) engine=InnoDB";
064                                        executeSql(myGeneratorName, creationSql);
065
066                                        String initSql = "insert into " + myGeneratorName + " values ( 1 )";
067                                        executeSql(myGeneratorName, initSql);
068
069                                }
070                                break;
071                        case DERBY_EMBEDDED:
072                        case H2_EMBEDDED:
073                                sql = "create sequence " + myGeneratorName + " start with 1 increment by 50";
074                                break;
075                        case POSTGRES_9_4:
076                                sql = "create sequence " + myGeneratorName + " start 1 increment 50";
077                                break;
078                        case ORACLE_12C:
079                                sql = "create sequence " + myGeneratorName + " start with 1 increment by 50";
080                                break;
081                        case MSSQL_2012:
082                                sql = "create sequence " + myGeneratorName + " start with 1 increment by 50";
083                                break;
084                        default:
085                                throw new IllegalStateException();
086                }
087
088                if (isNotBlank(sql)) {
089                        Set<String> sequenceNames =
090                                JdbcUtils.getSequenceNames(getConnectionProperties())
091                                        .stream()
092                                        .map(String::toLowerCase)
093                                        .collect(Collectors.toSet());
094                        ourLog.debug("Currently have sequences: {}", sequenceNames);
095                        if (sequenceNames.contains(myGeneratorName.toLowerCase())) {
096                                logInfo(ourLog, "Sequence {} already exists - No action performed", myGeneratorName);
097                                return;
098                        }
099
100                        executeSql(myGeneratorName, sql);
101                }
102
103        }
104
105        @Override
106        protected void generateEquals(EqualsBuilder theBuilder, BaseTask theOtherObject) {
107                AddIdGeneratorTask otherObject = (AddIdGeneratorTask) theOtherObject;
108                theBuilder.append(myGeneratorName, otherObject.myGeneratorName);
109        }
110
111        @Override
112        protected void generateHashCode(HashCodeBuilder theBuilder) {
113                theBuilder.append(myGeneratorName);
114        }
115}