| 1 | /* |
| 2 | * Copyright 2006-2007 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.support; |
| 18 | |
| 19 | import java.util.ArrayList; |
| 20 | import java.util.Date; |
| 21 | import java.util.List; |
| 22 | |
| 23 | import org.apache.commons.logging.Log; |
| 24 | import org.apache.commons.logging.LogFactory; |
| 25 | import org.springframework.batch.core.BatchStatus; |
| 26 | import org.springframework.batch.core.JobExecution; |
| 27 | import org.springframework.batch.core.JobInstance; |
| 28 | import org.springframework.batch.core.JobParameters; |
| 29 | import org.springframework.batch.core.StepExecution; |
| 30 | import org.springframework.batch.core.repository.JobExecutionAlreadyRunningException; |
| 31 | import org.springframework.batch.core.repository.JobInstanceAlreadyCompleteException; |
| 32 | import org.springframework.batch.core.repository.JobRepository; |
| 33 | import org.springframework.batch.core.repository.JobRestartException; |
| 34 | import org.springframework.batch.core.repository.dao.ExecutionContextDao; |
| 35 | import org.springframework.batch.core.repository.dao.JobExecutionDao; |
| 36 | import org.springframework.batch.core.repository.dao.JobInstanceDao; |
| 37 | import org.springframework.batch.core.repository.dao.StepExecutionDao; |
| 38 | import org.springframework.batch.item.ExecutionContext; |
| 39 | import org.springframework.util.Assert; |
| 40 | |
| 41 | /** |
| 42 | * |
| 43 | * <p> |
| 44 | * Implementation of {@link JobRepository} that stores JobInstances, |
| 45 | * JobExecutions, and StepExecutions using the injected DAOs. |
| 46 | * <p> |
| 47 | * |
| 48 | * @author Lucas Ward |
| 49 | * @author Dave Syer |
| 50 | * @author Robert Kasanicky |
| 51 | * |
| 52 | * @see JobRepository |
| 53 | * @see JobInstanceDao |
| 54 | * @see JobExecutionDao |
| 55 | * @see StepExecutionDao |
| 56 | * |
| 57 | */ |
| 58 | public class SimpleJobRepository implements JobRepository { |
| 59 | |
| 60 | private static final Log logger = LogFactory.getLog(SimpleJobRepository.class); |
| 61 | |
| 62 | private JobInstanceDao jobInstanceDao; |
| 63 | |
| 64 | private JobExecutionDao jobExecutionDao; |
| 65 | |
| 66 | private StepExecutionDao stepExecutionDao; |
| 67 | |
| 68 | private ExecutionContextDao ecDao; |
| 69 | |
| 70 | /** |
| 71 | * Provide default constructor with low visibility in case user wants to use |
| 72 | * use aop:proxy-target-class="true" for AOP interceptor. |
| 73 | */ |
| 74 | SimpleJobRepository() { |
| 75 | } |
| 76 | |
| 77 | public SimpleJobRepository(JobInstanceDao jobInstanceDao, JobExecutionDao jobExecutionDao, |
| 78 | StepExecutionDao stepExecutionDao, ExecutionContextDao ecDao) { |
| 79 | super(); |
| 80 | this.jobInstanceDao = jobInstanceDao; |
| 81 | this.jobExecutionDao = jobExecutionDao; |
| 82 | this.stepExecutionDao = stepExecutionDao; |
| 83 | this.ecDao = ecDao; |
| 84 | } |
| 85 | |
| 86 | public boolean isJobInstanceExists(String jobName, JobParameters jobParameters) { |
| 87 | return jobInstanceDao.getJobInstance(jobName, jobParameters) != null; |
| 88 | } |
| 89 | |
| 90 | public JobExecution createJobExecution(String jobName, JobParameters jobParameters) |
| 91 | throws JobExecutionAlreadyRunningException, JobRestartException, JobInstanceAlreadyCompleteException { |
| 92 | |
| 93 | Assert.notNull(jobName, "Job name must not be null."); |
| 94 | Assert.notNull(jobParameters, "JobParameters must not be null."); |
| 95 | |
| 96 | /* |
| 97 | * Find all jobs matching the runtime information. |
| 98 | * |
| 99 | * If this method is transactional, and the isolation level is |
| 100 | * REPEATABLE_READ or better, another launcher trying to start the same |
| 101 | * job in another thread or process will block until this transaction |
| 102 | * has finished. |
| 103 | */ |
| 104 | |
| 105 | JobInstance jobInstance = jobInstanceDao.getJobInstance(jobName, jobParameters); |
| 106 | ExecutionContext executionContext; |
| 107 | |
| 108 | // existing job instance found |
| 109 | if (jobInstance != null) { |
| 110 | |
| 111 | List<JobExecution> executions = jobExecutionDao.findJobExecutions(jobInstance); |
| 112 | |
| 113 | // check for running executions and find the last started |
| 114 | for (JobExecution execution : executions) { |
| 115 | if (execution.isRunning()) { |
| 116 | throw new JobExecutionAlreadyRunningException("A job execution for this job is already running: " |
| 117 | + jobInstance); |
| 118 | } |
| 119 | |
| 120 | BatchStatus status = execution.getStatus(); |
| 121 | if (status == BatchStatus.COMPLETED || status == BatchStatus.ABANDONED) { |
| 122 | throw new JobInstanceAlreadyCompleteException( |
| 123 | "A job instance already exists and is complete for parameters=" + jobParameters |
| 124 | + ". If you want to run this job again, change the parameters."); |
| 125 | } |
| 126 | } |
| 127 | executionContext = ecDao.getExecutionContext(jobExecutionDao.getLastJobExecution(jobInstance)); |
| 128 | } |
| 129 | else { |
| 130 | // no job found, create one |
| 131 | jobInstance = jobInstanceDao.createJobInstance(jobName, jobParameters); |
| 132 | executionContext = new ExecutionContext(); |
| 133 | } |
| 134 | |
| 135 | JobExecution jobExecution = new JobExecution(jobInstance); |
| 136 | jobExecution.setExecutionContext(executionContext); |
| 137 | jobExecution.setLastUpdated(new Date(System.currentTimeMillis())); |
| 138 | |
| 139 | // Save the JobExecution so that it picks up an ID (useful for clients |
| 140 | // monitoring asynchronous executions): |
| 141 | jobExecutionDao.saveJobExecution(jobExecution); |
| 142 | ecDao.saveExecutionContext(jobExecution); |
| 143 | |
| 144 | return jobExecution; |
| 145 | |
| 146 | } |
| 147 | |
| 148 | public void update(JobExecution jobExecution) { |
| 149 | |
| 150 | Assert.notNull(jobExecution, "JobExecution cannot be null."); |
| 151 | Assert.notNull(jobExecution.getJobId(), "JobExecution must have a Job ID set."); |
| 152 | Assert.notNull(jobExecution.getId(), "JobExecution must be already saved (have an id assigned)."); |
| 153 | |
| 154 | jobExecution.setLastUpdated(new Date(System.currentTimeMillis())); |
| 155 | jobExecutionDao.updateJobExecution(jobExecution); |
| 156 | } |
| 157 | |
| 158 | public void add(StepExecution stepExecution) { |
| 159 | validateStepExecution(stepExecution); |
| 160 | |
| 161 | stepExecution.setLastUpdated(new Date(System.currentTimeMillis())); |
| 162 | stepExecutionDao.saveStepExecution(stepExecution); |
| 163 | ecDao.saveExecutionContext(stepExecution); |
| 164 | } |
| 165 | |
| 166 | public void update(StepExecution stepExecution) { |
| 167 | validateStepExecution(stepExecution); |
| 168 | Assert.notNull(stepExecution.getId(), "StepExecution must already be saved (have an id assigned)"); |
| 169 | |
| 170 | stepExecution.setLastUpdated(new Date(System.currentTimeMillis())); |
| 171 | stepExecutionDao.updateStepExecution(stepExecution); |
| 172 | checkForInterruption(stepExecution); |
| 173 | } |
| 174 | |
| 175 | private void validateStepExecution(StepExecution stepExecution) { |
| 176 | Assert.notNull(stepExecution, "StepExecution cannot be null."); |
| 177 | Assert.notNull(stepExecution.getStepName(), "StepExecution's step name cannot be null."); |
| 178 | Assert.notNull(stepExecution.getJobExecutionId(), "StepExecution must belong to persisted JobExecution"); |
| 179 | } |
| 180 | |
| 181 | public void updateExecutionContext(StepExecution stepExecution) { |
| 182 | validateStepExecution(stepExecution); |
| 183 | Assert.notNull(stepExecution.getId(), "StepExecution must already be saved (have an id assigned)"); |
| 184 | ecDao.updateExecutionContext(stepExecution); |
| 185 | } |
| 186 | |
| 187 | public void updateExecutionContext(JobExecution jobExecution) { |
| 188 | ecDao.updateExecutionContext(jobExecution); |
| 189 | } |
| 190 | |
| 191 | public StepExecution getLastStepExecution(JobInstance jobInstance, String stepName) { |
| 192 | List<JobExecution> jobExecutions = jobExecutionDao.findJobExecutions(jobInstance); |
| 193 | List<StepExecution> stepExecutions = new ArrayList<StepExecution>(jobExecutions.size()); |
| 194 | for (JobExecution jobExecution : jobExecutions) { |
| 195 | stepExecutionDao.addStepExecutions(jobExecution); |
| 196 | for (StepExecution stepExecution : jobExecution.getStepExecutions()) { |
| 197 | if (stepName.equals(stepExecution.getStepName())) { |
| 198 | stepExecutions.add(stepExecution); |
| 199 | } |
| 200 | } |
| 201 | } |
| 202 | StepExecution latest = null; |
| 203 | for (StepExecution stepExecution : stepExecutions) { |
| 204 | if (latest == null) { |
| 205 | latest = stepExecution; |
| 206 | } |
| 207 | if (latest.getStartTime().getTime() < stepExecution.getStartTime().getTime()) { |
| 208 | latest = stepExecution; |
| 209 | } |
| 210 | } |
| 211 | if (latest != null) { |
| 212 | ExecutionContext executionContext = ecDao.getExecutionContext(latest); |
| 213 | latest.setExecutionContext(executionContext); |
| 214 | } |
| 215 | return latest; |
| 216 | } |
| 217 | |
| 218 | /** |
| 219 | * @return number of executions of the step within given job instance |
| 220 | */ |
| 221 | public int getStepExecutionCount(JobInstance jobInstance, String stepName) { |
| 222 | int count = 0; |
| 223 | List<JobExecution> jobExecutions = jobExecutionDao.findJobExecutions(jobInstance); |
| 224 | for (JobExecution jobExecution : jobExecutions) { |
| 225 | stepExecutionDao.addStepExecutions(jobExecution); |
| 226 | for (StepExecution stepExecution : jobExecution.getStepExecutions()) { |
| 227 | if (stepName.equals(stepExecution.getStepName())) { |
| 228 | count++; |
| 229 | } |
| 230 | } |
| 231 | } |
| 232 | return count; |
| 233 | } |
| 234 | |
| 235 | /* |
| 236 | * Check to determine whether or not the JobExecution that is the parent of |
| 237 | * the provided StepExecution has been interrupted. If, after synchronizing |
| 238 | * the status with the database, the status has been updated to STOPPING, |
| 239 | * then the job has been interrupted. |
| 240 | * |
| 241 | * @param stepExecution |
| 242 | */ |
| 243 | private void checkForInterruption(StepExecution stepExecution) { |
| 244 | JobExecution jobExecution = stepExecution.getJobExecution(); |
| 245 | jobExecutionDao.synchronizeStatus(jobExecution); |
| 246 | if (jobExecution.isStopping()) { |
| 247 | logger.info("Parent JobExecution is stopped, so passing message on to StepExecution"); |
| 248 | stepExecution.setTerminateOnly(); |
| 249 | } |
| 250 | } |
| 251 | |
| 252 | public JobExecution getLastJobExecution(String jobName, JobParameters jobParameters) { |
| 253 | JobInstance jobInstance = jobInstanceDao.getJobInstance(jobName, jobParameters); |
| 254 | if (jobInstance == null) { |
| 255 | return null; |
| 256 | } |
| 257 | JobExecution jobExecution = jobExecutionDao.getLastJobExecution(jobInstance); |
| 258 | |
| 259 | if (jobExecution != null) { |
| 260 | jobExecution.setExecutionContext(ecDao.getExecutionContext(jobExecution)); |
| 261 | } |
| 262 | return jobExecution; |
| 263 | |
| 264 | } |
| 265 | |
| 266 | |
| 267 | } |