| 1 | /* |
| 2 | * Copyright 2006-2013 the original author or authors. |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | package org.springframework.batch.core.repository.dao; |
| 18 | |
| 19 | import java.sql.ResultSet; |
| 20 | import java.sql.SQLException; |
| 21 | import java.sql.Types; |
| 22 | import java.util.ArrayList; |
| 23 | import java.util.List; |
| 24 | |
| 25 | import org.springframework.batch.core.DefaultJobKeyGenerator; |
| 26 | import org.springframework.batch.core.JobExecution; |
| 27 | import org.springframework.batch.core.JobInstance; |
| 28 | import org.springframework.batch.core.JobKeyGenerator; |
| 29 | import org.springframework.batch.core.JobParameters; |
| 30 | import org.springframework.beans.factory.InitializingBean; |
| 31 | import org.springframework.dao.DataAccessException; |
| 32 | import org.springframework.dao.EmptyResultDataAccessException; |
| 33 | import org.springframework.jdbc.core.ResultSetExtractor; |
| 34 | import org.springframework.jdbc.core.simple.ParameterizedRowMapper; |
| 35 | import org.springframework.jdbc.support.incrementer.DataFieldMaxValueIncrementer; |
| 36 | import org.springframework.util.Assert; |
| 37 | import org.springframework.util.StringUtils; |
| 38 | |
| 39 | /** |
| 40 | * JDBC implementation of {@link JobInstanceDao}. Uses sequences (via Spring's |
| 41 | * {@link DataFieldMaxValueIncrementer} abstraction) to create all primary keys |
| 42 | * before inserting a new row. Objects are checked to ensure all mandatory |
| 43 | * fields to be stored are not null. If any are found to be null, an |
| 44 | * IllegalArgumentException will be thrown. This could be left to JdbcTemplate, |
| 45 | * however, the exception will be fairly vague, and fails to highlight which |
| 46 | * field caused the exception. |
| 47 | * |
| 48 | * @author Lucas Ward |
| 49 | * @author Dave Syer |
| 50 | * @author Robert Kasanicky |
| 51 | * @author Michael Minella |
| 52 | */ |
| 53 | public class JdbcJobInstanceDao extends AbstractJdbcBatchMetadataDao implements |
| 54 | JobInstanceDao, InitializingBean { |
| 55 | |
| 56 | private static final String CREATE_JOB_INSTANCE = "INSERT into %PREFIX%JOB_INSTANCE(JOB_INSTANCE_ID, JOB_NAME, JOB_KEY, VERSION)" |
| 57 | + " values (?, ?, ?, ?)"; |
| 58 | |
| 59 | private static final String FIND_JOBS_WITH_NAME = "SELECT JOB_INSTANCE_ID, JOB_NAME from %PREFIX%JOB_INSTANCE where JOB_NAME = ?"; |
| 60 | |
| 61 | private static final String FIND_JOBS_WITH_KEY = FIND_JOBS_WITH_NAME |
| 62 | + " and JOB_KEY = ?"; |
| 63 | |
| 64 | private static final String FIND_JOBS_WITH_EMPTY_KEY = "SELECT JOB_INSTANCE_ID, JOB_NAME from %PREFIX%JOB_INSTANCE where JOB_NAME = ? and (JOB_KEY = ? OR JOB_KEY is NULL)"; |
| 65 | |
| 66 | private static final String GET_JOB_FROM_ID = "SELECT JOB_INSTANCE_ID, JOB_NAME, JOB_KEY, VERSION from %PREFIX%JOB_INSTANCE where JOB_INSTANCE_ID = ?"; |
| 67 | |
| 68 | private static final String GET_JOB_FROM_EXECUTION_ID = "SELECT ji.JOB_INSTANCE_ID, JOB_NAME, JOB_KEY, ji.VERSION from %PREFIX%JOB_INSTANCE ji, " |
| 69 | + "%PREFIX%JOB_EXECUTION je where JOB_EXECUTION_ID = ? and ji.JOB_INSTANCE_ID = je.JOB_INSTANCE_ID"; |
| 70 | |
| 71 | private static final String FIND_JOB_NAMES = "SELECT distinct JOB_NAME from %PREFIX%JOB_INSTANCE order by JOB_NAME"; |
| 72 | |
| 73 | private static final String FIND_LAST_JOBS_BY_NAME = "SELECT JOB_INSTANCE_ID, JOB_NAME from %PREFIX%JOB_INSTANCE where JOB_NAME = ? order by JOB_INSTANCE_ID desc"; |
| 74 | |
| 75 | private DataFieldMaxValueIncrementer jobIncrementer; |
| 76 | |
| 77 | private JobKeyGenerator<JobParameters> jobKeyGenerator = new DefaultJobKeyGenerator(); |
| 78 | |
| 79 | /** |
| 80 | * In this jdbc implementation a job id is obtained by asking the |
| 81 | * jobIncrementer (which is likely a sequence) for the next long value, and |
| 82 | * then passing the Id and parameter values into an INSERT statement. |
| 83 | * |
| 84 | * @see JobInstanceDao#createJobInstance(String, JobParameters) |
| 85 | * @throws IllegalArgumentException |
| 86 | * if any {@link JobParameters} fields are null. |
| 87 | */ |
| 88 | @Override |
| 89 | public JobInstance createJobInstance(String jobName, |
| 90 | JobParameters jobParameters) { |
| 91 | |
| 92 | Assert.notNull(jobName, "Job name must not be null."); |
| 93 | Assert.notNull(jobParameters, "JobParameters must not be null."); |
| 94 | |
| 95 | Assert.state(getJobInstance(jobName, jobParameters) == null, |
| 96 | "JobInstance must not already exist"); |
| 97 | |
| 98 | Long jobId = jobIncrementer.nextLongValue(); |
| 99 | |
| 100 | JobInstance jobInstance = new JobInstance(jobId, jobName); |
| 101 | jobInstance.incrementVersion(); |
| 102 | |
| 103 | Object[] parameters = new Object[] { jobId, jobName, |
| 104 | jobKeyGenerator.generateKey(jobParameters), jobInstance.getVersion() }; |
| 105 | getJdbcTemplate().update( |
| 106 | getQuery(CREATE_JOB_INSTANCE), |
| 107 | parameters, |
| 108 | new int[] { Types.BIGINT, Types.VARCHAR, Types.VARCHAR, |
| 109 | Types.INTEGER }); |
| 110 | |
| 111 | return jobInstance; |
| 112 | } |
| 113 | |
| 114 | /** |
| 115 | * The job table is queried for <strong>any</strong> jobs that match the |
| 116 | * given identifier, adding them to a list via the RowMapper callback. |
| 117 | * |
| 118 | * @see JobInstanceDao#getJobInstance(String, JobParameters) |
| 119 | * @throws IllegalArgumentException |
| 120 | * if any {@link JobParameters} fields are null. |
| 121 | */ |
| 122 | @Override |
| 123 | public JobInstance getJobInstance(final String jobName, |
| 124 | final JobParameters jobParameters) { |
| 125 | |
| 126 | Assert.notNull(jobName, "Job name must not be null."); |
| 127 | Assert.notNull(jobParameters, "JobParameters must not be null."); |
| 128 | |
| 129 | String jobKey = jobKeyGenerator.generateKey(jobParameters); |
| 130 | |
| 131 | ParameterizedRowMapper<JobInstance> rowMapper = new JobInstanceRowMapper(); |
| 132 | |
| 133 | List<JobInstance> instances; |
| 134 | if (StringUtils.hasLength(jobKey)) { |
| 135 | instances = getJdbcTemplate().query(getQuery(FIND_JOBS_WITH_KEY), |
| 136 | rowMapper, jobName, jobKey); |
| 137 | } else { |
| 138 | instances = getJdbcTemplate().query( |
| 139 | getQuery(FIND_JOBS_WITH_EMPTY_KEY), rowMapper, jobName, |
| 140 | jobKey); |
| 141 | } |
| 142 | |
| 143 | if (instances.isEmpty()) { |
| 144 | return null; |
| 145 | } else { |
| 146 | Assert.state(instances.size() == 1); |
| 147 | return instances.get(0); |
| 148 | } |
| 149 | } |
| 150 | |
| 151 | /* |
| 152 | * (non-Javadoc) |
| 153 | * |
| 154 | * @see |
| 155 | * org.springframework.batch.core.repository.dao.JobInstanceDao#getJobInstance |
| 156 | * (java.lang.Long) |
| 157 | */ |
| 158 | @Override |
| 159 | public JobInstance getJobInstance(Long instanceId) { |
| 160 | |
| 161 | try { |
| 162 | return getJdbcTemplate().queryForObject(getQuery(GET_JOB_FROM_ID), |
| 163 | new JobInstanceRowMapper(), instanceId); |
| 164 | } catch (EmptyResultDataAccessException e) { |
| 165 | return null; |
| 166 | } |
| 167 | |
| 168 | } |
| 169 | |
| 170 | /* |
| 171 | * (non-Javadoc) |
| 172 | * |
| 173 | * @see |
| 174 | * org.springframework.batch.core.repository.dao.JobInstanceDao#getJobNames |
| 175 | * () |
| 176 | */ |
| 177 | @Override |
| 178 | public List<String> getJobNames() { |
| 179 | return getJdbcTemplate().query(getQuery(FIND_JOB_NAMES), |
| 180 | new ParameterizedRowMapper<String>() { |
| 181 | @Override |
| 182 | public String mapRow(ResultSet rs, int rowNum) |
| 183 | throws SQLException { |
| 184 | return rs.getString(1); |
| 185 | } |
| 186 | }); |
| 187 | } |
| 188 | |
| 189 | /* |
| 190 | * (non-Javadoc) |
| 191 | * |
| 192 | * @seeorg.springframework.batch.core.repository.dao.JobInstanceDao# |
| 193 | * getLastJobInstances(java.lang.String, int) |
| 194 | */ |
| 195 | @Override |
| 196 | @SuppressWarnings("rawtypes") |
| 197 | public List<JobInstance> getJobInstances(String jobName, final int start, |
| 198 | final int count) { |
| 199 | |
| 200 | ResultSetExtractor extractor = new ResultSetExtractor() { |
| 201 | |
| 202 | private List<JobInstance> list = new ArrayList<JobInstance>(); |
| 203 | |
| 204 | @Override |
| 205 | public Object extractData(ResultSet rs) throws SQLException, |
| 206 | DataAccessException { |
| 207 | int rowNum = 0; |
| 208 | while (rowNum < start && rs.next()) { |
| 209 | rowNum++; |
| 210 | } |
| 211 | while (rowNum < start + count && rs.next()) { |
| 212 | ParameterizedRowMapper<JobInstance> rowMapper = new JobInstanceRowMapper(); |
| 213 | list.add(rowMapper.mapRow(rs, rowNum)); |
| 214 | rowNum++; |
| 215 | } |
| 216 | return list; |
| 217 | } |
| 218 | |
| 219 | }; |
| 220 | |
| 221 | @SuppressWarnings("unchecked") |
| 222 | List<JobInstance> result = (List<JobInstance>) getJdbcTemplate().query(getQuery(FIND_LAST_JOBS_BY_NAME), |
| 223 | new Object[] { jobName }, extractor); |
| 224 | |
| 225 | return result; |
| 226 | } |
| 227 | |
| 228 | /* |
| 229 | * (non-Javadoc) |
| 230 | * |
| 231 | * @see |
| 232 | * org.springframework.batch.core.repository.dao.JobInstanceDao#getJobInstance |
| 233 | * (org.springframework.batch.core.JobExecution) |
| 234 | */ |
| 235 | @Override |
| 236 | public JobInstance getJobInstance(JobExecution jobExecution) { |
| 237 | |
| 238 | try { |
| 239 | return getJdbcTemplate().queryForObject( |
| 240 | getQuery(GET_JOB_FROM_EXECUTION_ID), |
| 241 | new JobInstanceRowMapper(), jobExecution.getId()); |
| 242 | } catch (EmptyResultDataAccessException e) { |
| 243 | return null; |
| 244 | } |
| 245 | } |
| 246 | |
| 247 | /** |
| 248 | * Setter for {@link DataFieldMaxValueIncrementer} to be used when |
| 249 | * generating primary keys for {@link JobInstance} instances. |
| 250 | * |
| 251 | * @param jobIncrementer |
| 252 | * the {@link DataFieldMaxValueIncrementer} |
| 253 | */ |
| 254 | public void setJobIncrementer(DataFieldMaxValueIncrementer jobIncrementer) { |
| 255 | this.jobIncrementer = jobIncrementer; |
| 256 | } |
| 257 | |
| 258 | @Override |
| 259 | public void afterPropertiesSet() throws Exception { |
| 260 | super.afterPropertiesSet(); |
| 261 | Assert.notNull(jobIncrementer); |
| 262 | } |
| 263 | |
| 264 | /** |
| 265 | * @author Dave Syer |
| 266 | * |
| 267 | */ |
| 268 | private final class JobInstanceRowMapper implements |
| 269 | ParameterizedRowMapper<JobInstance> { |
| 270 | |
| 271 | public JobInstanceRowMapper() { |
| 272 | } |
| 273 | |
| 274 | @Override |
| 275 | public JobInstance mapRow(ResultSet rs, int rowNum) throws SQLException { |
| 276 | JobInstance jobInstance = new JobInstance(rs.getLong(1), rs.getString(2)); |
| 277 | // should always be at version=0 because they never get updated |
| 278 | jobInstance.incrementVersion(); |
| 279 | return jobInstance; |
| 280 | } |
| 281 | } |
| 282 | } |