| 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; |
| 18 | |
| 19 | import java.io.IOException; |
| 20 | import java.io.ObjectInputStream; |
| 21 | import java.util.ArrayList; |
| 22 | import java.util.Collection; |
| 23 | import java.util.Collections; |
| 24 | import java.util.Date; |
| 25 | import java.util.HashSet; |
| 26 | import java.util.List; |
| 27 | import java.util.Set; |
| 28 | import java.util.concurrent.CopyOnWriteArrayList; |
| 29 | import java.util.concurrent.CopyOnWriteArraySet; |
| 30 | |
| 31 | import org.springframework.batch.item.ExecutionContext; |
| 32 | |
| 33 | /** |
| 34 | * Batch domain object representing the execution of a job. |
| 35 | * |
| 36 | * @author Lucas Ward |
| 37 | * |
| 38 | */ |
| 39 | public class JobExecution extends Entity { |
| 40 | |
| 41 | private JobInstance jobInstance; |
| 42 | |
| 43 | private volatile Collection<StepExecution> stepExecutions = new CopyOnWriteArraySet<StepExecution>(); |
| 44 | |
| 45 | private volatile BatchStatus status = BatchStatus.STARTING; |
| 46 | |
| 47 | private volatile Date startTime = null; |
| 48 | |
| 49 | private volatile Date createTime = new Date(System.currentTimeMillis()); |
| 50 | |
| 51 | private volatile Date endTime = null; |
| 52 | |
| 53 | private volatile Date lastUpdated = null; |
| 54 | |
| 55 | private volatile ExitStatus exitStatus = ExitStatus.UNKNOWN; |
| 56 | |
| 57 | private volatile ExecutionContext executionContext = new ExecutionContext(); |
| 58 | |
| 59 | private transient volatile List<Throwable> failureExceptions = new CopyOnWriteArrayList<Throwable>(); |
| 60 | |
| 61 | /** |
| 62 | * Because a JobExecution isn't valid unless the job is set, this |
| 63 | * constructor is the only valid one from a modelling point of view. |
| 64 | * |
| 65 | * @param job the job of which this execution is a part |
| 66 | */ |
| 67 | public JobExecution(JobInstance job, Long id) { |
| 68 | super(id); |
| 69 | this.jobInstance = job; |
| 70 | } |
| 71 | |
| 72 | /** |
| 73 | * Constructor for transient (unsaved) instances. |
| 74 | * |
| 75 | * @param job the enclosing {@link JobInstance} |
| 76 | */ |
| 77 | public JobExecution(JobInstance job) { |
| 78 | this(job, null); |
| 79 | } |
| 80 | |
| 81 | public JobExecution(Long id) { |
| 82 | super(id); |
| 83 | } |
| 84 | |
| 85 | public Date getEndTime() { |
| 86 | return endTime; |
| 87 | } |
| 88 | |
| 89 | public void setJobInstance(JobInstance jobInstance) { |
| 90 | this.jobInstance = jobInstance; |
| 91 | } |
| 92 | |
| 93 | public void setEndTime(Date endTime) { |
| 94 | this.endTime = endTime; |
| 95 | } |
| 96 | |
| 97 | public Date getStartTime() { |
| 98 | return startTime; |
| 99 | } |
| 100 | |
| 101 | public void setStartTime(Date startTime) { |
| 102 | this.startTime = startTime; |
| 103 | } |
| 104 | |
| 105 | public BatchStatus getStatus() { |
| 106 | return status; |
| 107 | } |
| 108 | |
| 109 | /** |
| 110 | * Set the value of the status field. |
| 111 | * |
| 112 | * @param status the status to set |
| 113 | */ |
| 114 | public void setStatus(BatchStatus status) { |
| 115 | this.status = status; |
| 116 | } |
| 117 | |
| 118 | /** |
| 119 | * Upgrade the status field if the provided value is greater than the |
| 120 | * existing one. Clients using this method to set the status can be sure |
| 121 | * that they don't overwrite a failed status with an successful one. |
| 122 | * |
| 123 | * @param status the new status value |
| 124 | */ |
| 125 | public void upgradeStatus(BatchStatus status) { |
| 126 | this.status = this.status.upgradeTo(status); |
| 127 | } |
| 128 | |
| 129 | /** |
| 130 | * Convenience getter for for the id of the enclosing job. Useful for DAO |
| 131 | * implementations. |
| 132 | * |
| 133 | * @return the id of the enclosing job |
| 134 | */ |
| 135 | public Long getJobId() { |
| 136 | if (jobInstance != null) { |
| 137 | return jobInstance.getId(); |
| 138 | } |
| 139 | return null; |
| 140 | } |
| 141 | |
| 142 | /** |
| 143 | * @param exitStatus |
| 144 | */ |
| 145 | public void setExitStatus(ExitStatus exitStatus) { |
| 146 | this.exitStatus = exitStatus; |
| 147 | } |
| 148 | |
| 149 | /** |
| 150 | * @return the exitCode |
| 151 | */ |
| 152 | public ExitStatus getExitStatus() { |
| 153 | return exitStatus; |
| 154 | } |
| 155 | |
| 156 | /** |
| 157 | * @return the Job that is executing. |
| 158 | */ |
| 159 | public JobInstance getJobInstance() { |
| 160 | return jobInstance; |
| 161 | } |
| 162 | |
| 163 | /** |
| 164 | * Accessor for the step executions. |
| 165 | * |
| 166 | * @return the step executions that were registered |
| 167 | */ |
| 168 | public Collection<StepExecution> getStepExecutions() { |
| 169 | return Collections.unmodifiableList(new ArrayList<StepExecution>(stepExecutions)); |
| 170 | } |
| 171 | |
| 172 | /** |
| 173 | * Register a step execution with the current job execution. |
| 174 | * @param stepName the name of the step the new execution is associated with |
| 175 | */ |
| 176 | public StepExecution createStepExecution(String stepName) { |
| 177 | StepExecution stepExecution = new StepExecution(stepName, this); |
| 178 | this.stepExecutions.add(stepExecution); |
| 179 | return stepExecution; |
| 180 | } |
| 181 | |
| 182 | /** |
| 183 | * Test if this {@link JobExecution} indicates that it is running. It should |
| 184 | * be noted that this does not necessarily mean that it has been persisted |
| 185 | * as such yet. |
| 186 | * @return true if the end time is null |
| 187 | */ |
| 188 | public boolean isRunning() { |
| 189 | return endTime == null; |
| 190 | } |
| 191 | |
| 192 | /** |
| 193 | * Test if this {@link JobExecution} indicates that it has been signalled to |
| 194 | * stop. |
| 195 | * @return true if the status is {@link BatchStatus#STOPPING} |
| 196 | */ |
| 197 | public boolean isStopping() { |
| 198 | return status == BatchStatus.STOPPING; |
| 199 | } |
| 200 | |
| 201 | /** |
| 202 | * Signal the {@link JobExecution} to stop. Iterates through the associated |
| 203 | * {@link StepExecution}s, calling {@link StepExecution#setTerminateOnly()}. |
| 204 | * |
| 205 | */ |
| 206 | public void stop() { |
| 207 | for (StepExecution stepExecution : stepExecutions) { |
| 208 | stepExecution.setTerminateOnly(); |
| 209 | } |
| 210 | status = BatchStatus.STOPPING; |
| 211 | } |
| 212 | |
| 213 | /** |
| 214 | * Sets the {@link ExecutionContext} for this execution |
| 215 | * |
| 216 | * @param executionContext the context |
| 217 | */ |
| 218 | public void setExecutionContext(ExecutionContext executionContext) { |
| 219 | this.executionContext = executionContext; |
| 220 | } |
| 221 | |
| 222 | /** |
| 223 | * Returns the {@link ExecutionContext} for this execution. The content is |
| 224 | * expected to be persisted after each step completion (successful or not). |
| 225 | * |
| 226 | * @return the context |
| 227 | */ |
| 228 | public ExecutionContext getExecutionContext() { |
| 229 | return executionContext; |
| 230 | } |
| 231 | |
| 232 | /** |
| 233 | * @return the time when this execution was created. |
| 234 | */ |
| 235 | public Date getCreateTime() { |
| 236 | return createTime; |
| 237 | } |
| 238 | |
| 239 | /** |
| 240 | * @param createTime creation time of this execution. |
| 241 | */ |
| 242 | public void setCreateTime(Date createTime) { |
| 243 | this.createTime = createTime; |
| 244 | } |
| 245 | |
| 246 | /** |
| 247 | * Package private method for re-constituting the step executions from |
| 248 | * existing instances. |
| 249 | * @param stepExecution |
| 250 | */ |
| 251 | void addStepExecution(StepExecution stepExecution) { |
| 252 | stepExecutions.add(stepExecution); |
| 253 | } |
| 254 | |
| 255 | /** |
| 256 | * Get the date representing the last time this JobExecution was updated in |
| 257 | * the JobRepository. |
| 258 | * |
| 259 | * @return Date representing the last time this JobExecution was updated. |
| 260 | */ |
| 261 | public Date getLastUpdated() { |
| 262 | return lastUpdated; |
| 263 | } |
| 264 | |
| 265 | /** |
| 266 | * Set the last time this JobExecution was updated. |
| 267 | * |
| 268 | * @param lastUpdated |
| 269 | */ |
| 270 | public void setLastUpdated(Date lastUpdated) { |
| 271 | this.lastUpdated = lastUpdated; |
| 272 | } |
| 273 | |
| 274 | public List<Throwable> getFailureExceptions() { |
| 275 | return failureExceptions; |
| 276 | } |
| 277 | |
| 278 | /** |
| 279 | * Add the provided throwable to the failure exception list. |
| 280 | * |
| 281 | * @param t |
| 282 | */ |
| 283 | public synchronized void addFailureException(Throwable t) { |
| 284 | this.failureExceptions.add(t); |
| 285 | } |
| 286 | |
| 287 | /** |
| 288 | * Return all failure causing exceptions for this JobExecution, including |
| 289 | * step executions. |
| 290 | * |
| 291 | * @return List<Throwable> containing all exceptions causing failure for |
| 292 | * this JobExecution. |
| 293 | */ |
| 294 | public synchronized List<Throwable> getAllFailureExceptions() { |
| 295 | |
| 296 | Set<Throwable> allExceptions = new HashSet<Throwable>(failureExceptions); |
| 297 | for (StepExecution stepExecution : stepExecutions) { |
| 298 | allExceptions.addAll(stepExecution.getFailureExceptions()); |
| 299 | } |
| 300 | |
| 301 | return new ArrayList<Throwable>(allExceptions); |
| 302 | } |
| 303 | |
| 304 | /** |
| 305 | * Deserialise and ensure transient fields are re-instantiated when read |
| 306 | * back |
| 307 | */ |
| 308 | private void readObject(ObjectInputStream stream) throws IOException, ClassNotFoundException { |
| 309 | stream.defaultReadObject(); |
| 310 | failureExceptions = new ArrayList<Throwable>(); |
| 311 | } |
| 312 | |
| 313 | /* |
| 314 | * (non-Javadoc) |
| 315 | * |
| 316 | * @see org.springframework.batch.core.domain.Entity#toString() |
| 317 | */ |
| 318 | public String toString() { |
| 319 | return super.toString() |
| 320 | + String.format(", startTime=%s, endTime=%s, lastUpdated=%s, status=%s, exitStatus=%s, job=[%s]", |
| 321 | startTime, endTime, lastUpdated, status, exitStatus, jobInstance); |
| 322 | } |
| 323 | |
| 324 | /** |
| 325 | * Add some step executions. For internal use only. |
| 326 | * @param stepExecutions step executions to add to the current list |
| 327 | */ |
| 328 | public void addStepExecutions(List<StepExecution> stepExecutions) { |
| 329 | if (stepExecutions!=null) { |
| 330 | this.stepExecutions.removeAll(stepExecutions); |
| 331 | this.stepExecutions.addAll(stepExecutions); |
| 332 | } |
| 333 | } |
| 334 | |
| 335 | } |