| 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 | package org.springframework.batch.core.launch.support; |
| 17 | |
| 18 | import java.io.BufferedReader; |
| 19 | import java.io.IOException; |
| 20 | import java.io.InputStreamReader; |
| 21 | import java.util.ArrayList; |
| 22 | import java.util.Arrays; |
| 23 | import java.util.Collections; |
| 24 | import java.util.HashMap; |
| 25 | import java.util.HashSet; |
| 26 | import java.util.List; |
| 27 | import java.util.Map; |
| 28 | import java.util.Properties; |
| 29 | import java.util.Set; |
| 30 | |
| 31 | import org.apache.commons.logging.Log; |
| 32 | import org.apache.commons.logging.LogFactory; |
| 33 | import org.springframework.batch.core.BatchStatus; |
| 34 | import org.springframework.batch.core.ExitStatus; |
| 35 | import org.springframework.batch.core.Job; |
| 36 | import org.springframework.batch.core.JobExecution; |
| 37 | import org.springframework.batch.core.JobInstance; |
| 38 | import org.springframework.batch.core.JobParameter; |
| 39 | import org.springframework.batch.core.JobParameters; |
| 40 | import org.springframework.batch.core.JobParametersIncrementer; |
| 41 | import org.springframework.batch.core.configuration.JobLocator; |
| 42 | import org.springframework.batch.core.converter.DefaultJobParametersConverter; |
| 43 | import org.springframework.batch.core.converter.JobParametersConverter; |
| 44 | import org.springframework.batch.core.explore.JobExplorer; |
| 45 | import org.springframework.batch.core.launch.JobExecutionNotFailedException; |
| 46 | import org.springframework.batch.core.launch.JobExecutionNotRunningException; |
| 47 | import org.springframework.batch.core.launch.JobExecutionNotStoppedException; |
| 48 | import org.springframework.batch.core.launch.JobLauncher; |
| 49 | import org.springframework.batch.core.launch.JobParametersNotFoundException; |
| 50 | import org.springframework.batch.core.repository.JobRepository; |
| 51 | import org.springframework.beans.factory.BeanDefinitionStoreException; |
| 52 | import org.springframework.beans.factory.config.AutowireCapableBeanFactory; |
| 53 | import org.springframework.context.ConfigurableApplicationContext; |
| 54 | import org.springframework.context.support.ClassPathXmlApplicationContext; |
| 55 | import org.springframework.util.Assert; |
| 56 | import org.springframework.util.StringUtils; |
| 57 | |
| 58 | /** |
| 59 | * <p> |
| 60 | * Basic launcher for starting jobs from the command line. In general, it is |
| 61 | * assumed that this launcher will primarily be used to start a job via a script |
| 62 | * from an Enterprise Scheduler. Therefore, exit codes are mapped to integers so |
| 63 | * that schedulers can use the returned values to determine the next course of |
| 64 | * action. The returned values can also be useful to operations teams in |
| 65 | * determining what should happen upon failure. For example, a returned code of |
| 66 | * 5 might mean that some resource wasn't available and the job should be |
| 67 | * restarted. However, a code of 10 might mean that something critical has |
| 68 | * happened and the issue should be escalated. |
| 69 | * </p> |
| 70 | * |
| 71 | * <p> |
| 72 | * With any launch of a batch job within Spring Batch, a Spring context |
| 73 | * containing the {@link Job} and some execution context has to be created. This |
| 74 | * command line launcher can be used to load the job and its context from a |
| 75 | * single location. All dependencies of the launcher will then be satisfied by |
| 76 | * autowiring by type from the combined application context. Default values are |
| 77 | * provided for all fields except the {@link JobLauncher} and {@link JobLocator} |
| 78 | * . Therefore, if autowiring fails to set it (it should be noted that |
| 79 | * dependency checking is disabled because most of the fields have default |
| 80 | * values and thus don't require dependencies to be fulfilled via autowiring) |
| 81 | * then an exception will be thrown. It should also be noted that even if an |
| 82 | * exception is thrown by this class, it will be mapped to an integer and |
| 83 | * returned. |
| 84 | * </p> |
| 85 | * |
| 86 | * <p> |
| 87 | * Notice a property is available to set the {@link SystemExiter}. This class is |
| 88 | * used to exit from the main method, rather than calling System.exit() |
| 89 | * directly. This is because unit testing a class the calls System.exit() is |
| 90 | * impossible without kicking off the test within a new JVM, which it is |
| 91 | * possible to do, however it is a complex solution, much more so than |
| 92 | * strategizing the exiter. |
| 93 | * </p> |
| 94 | * |
| 95 | * <p> |
| 96 | * The arguments to this class can be provided on the command line (separated by |
| 97 | * spaces), or through stdin (separated by new line). They are as follows: |
| 98 | * </p> |
| 99 | * |
| 100 | * <code> |
| 101 | * jobPath <options> jobIdentifier (jobParameters)* |
| 102 | * </code> |
| 103 | * |
| 104 | * <p> |
| 105 | * The command line options are as follows |
| 106 | * <ul> |
| 107 | * <li>jobPath: the xml application context containing a {@link Job} |
| 108 | * <li>-restart: (optional) to restart the last failed execution</li> |
| 109 | * <li>-stop: (optional) to stop a running execution</li> |
| 110 | * <li>-abandon: (optional) to abandon a stopped execution</li> |
| 111 | * <li>-next: (optional) to start the next in a sequence according to the |
| 112 | * {@link JobParametersIncrementer} in the {@link Job}</li> |
| 113 | * <li>jobIdentifier: the name of the job or the id of a job execution (for |
| 114 | * -stop, -abandon or -restart). |
| 115 | * <li>jobParameters: 0 to many parameters that will be used to launch a job |
| 116 | * specified in the form of <code>key=value</code> pairs. |
| 117 | * </ul> |
| 118 | * </p> |
| 119 | * |
| 120 | * <p> |
| 121 | * If the <code>-next</code> option is used the parameters on the command line |
| 122 | * (if any) are appended to those retrieved from the incrementer, overriding any |
| 123 | * with the same key. |
| 124 | * </p> |
| 125 | * |
| 126 | * <p> |
| 127 | * The combined application context must contain only one instance of |
| 128 | * {@link JobLauncher}. The job parameters passed in to the command line will be |
| 129 | * converted to {@link Properties} by assuming that each individual element is |
| 130 | * one parameter that is separated by an equals sign. For example, |
| 131 | * "vendor.id=290232". The resulting properties instance is converted to |
| 132 | * {@link JobParameters} using a {@link JobParametersConverter} from the |
| 133 | * application context (if there is one, or a |
| 134 | * {@link DefaultJobParametersConverter} otherwise). Below is an example |
| 135 | * arguments list: " |
| 136 | * |
| 137 | * <p> |
| 138 | * <code> |
| 139 | * java org.springframework.batch.core.launch.support.CommandLineJobRunner testJob.xml |
| 140 | * testJob schedule.date=2008/01/24 vendor.id=3902483920 |
| 141 | * <code> |
| 142 | * </p> |
| 143 | * |
| 144 | * <p> |
| 145 | * Once arguments have been successfully parsed, autowiring will be used to set |
| 146 | * various dependencies. The {@JobLauncher} for example, will be |
| 147 | * loaded this way. If none is contained in the bean factory (it searches by |
| 148 | * type) then a {@link BeanDefinitionStoreException} will be thrown. The same |
| 149 | * exception will also be thrown if there is more than one present. Assuming the |
| 150 | * JobLauncher has been set correctly, the jobIdentifier argument will be used |
| 151 | * to obtain an actual {@link Job}. If a {@link JobLocator} has been set, then |
| 152 | * it will be used, if not the beanFactory will be asked, using the |
| 153 | * jobIdentifier as the bean id. |
| 154 | * </p> |
| 155 | * |
| 156 | * @author Dave Syer |
| 157 | * @author Lucas Ward |
| 158 | * @since 1.0 |
| 159 | */ |
| 160 | public class CommandLineJobRunner { |
| 161 | |
| 162 | protected static final Log logger = LogFactory.getLog(CommandLineJobRunner.class); |
| 163 | |
| 164 | private ExitCodeMapper exitCodeMapper = new SimpleJvmExitCodeMapper(); |
| 165 | |
| 166 | private JobLauncher launcher; |
| 167 | |
| 168 | private JobLocator jobLocator; |
| 169 | |
| 170 | // Package private for unit test |
| 171 | private static SystemExiter systemExiter = new JvmSystemExiter(); |
| 172 | |
| 173 | private static String message = ""; |
| 174 | |
| 175 | private JobParametersConverter jobParametersConverter = new DefaultJobParametersConverter(); |
| 176 | |
| 177 | private JobExplorer jobExplorer; |
| 178 | |
| 179 | private JobRepository jobRepository; |
| 180 | |
| 181 | private final static List<String> VALID_OPTS = Arrays.asList(new String [] {"-restart", "-next", "-stop", "-abandon"}); |
| 182 | |
| 183 | /** |
| 184 | * Injection setter for the {@link JobLauncher}. |
| 185 | * |
| 186 | * @param launcher the launcher to set |
| 187 | */ |
| 188 | public void setLauncher(JobLauncher launcher) { |
| 189 | this.launcher = launcher; |
| 190 | } |
| 191 | |
| 192 | /** |
| 193 | * @param jobRepository the jobRepository to set |
| 194 | */ |
| 195 | public void setJobRepository(JobRepository jobRepository) { |
| 196 | this.jobRepository = jobRepository; |
| 197 | } |
| 198 | |
| 199 | /** |
| 200 | * Injection setter for {@link JobExplorer}. |
| 201 | * |
| 202 | * @param jobExplorer the {@link JobExplorer} to set |
| 203 | */ |
| 204 | public void setJobExplorer(JobExplorer jobExplorer) { |
| 205 | this.jobExplorer = jobExplorer; |
| 206 | } |
| 207 | |
| 208 | /** |
| 209 | * Injection setter for the {@link ExitCodeMapper}. |
| 210 | * |
| 211 | * @param exitCodeMapper the exitCodeMapper to set |
| 212 | */ |
| 213 | public void setExitCodeMapper(ExitCodeMapper exitCodeMapper) { |
| 214 | this.exitCodeMapper = exitCodeMapper; |
| 215 | } |
| 216 | |
| 217 | /** |
| 218 | * Static setter for the {@link SystemExiter} so it can be adjusted before |
| 219 | * dependency injection. Typically overridden by |
| 220 | * {@link #setSystemExiter(SystemExiter)}. |
| 221 | * |
| 222 | * @param systemExiter |
| 223 | */ |
| 224 | public static void presetSystemExiter(SystemExiter systemExiter) { |
| 225 | CommandLineJobRunner.systemExiter = systemExiter; |
| 226 | } |
| 227 | |
| 228 | /** |
| 229 | * Retrieve the error message set by an instance of |
| 230 | * {@link CommandLineJobRunner} as it exits. Empty if the last job launched |
| 231 | * was successful. |
| 232 | * |
| 233 | * @return the error message |
| 234 | */ |
| 235 | public static String getErrorMessage() { |
| 236 | return message; |
| 237 | } |
| 238 | |
| 239 | /** |
| 240 | * Injection setter for the {@link SystemExiter}. |
| 241 | * |
| 242 | * @param systemExiter |
| 243 | */ |
| 244 | public void setSystemExiter(SystemExiter systemExiter) { |
| 245 | CommandLineJobRunner.systemExiter = systemExiter; |
| 246 | } |
| 247 | |
| 248 | /** |
| 249 | * Injection setter for {@link JobParametersConverter}. |
| 250 | * |
| 251 | * @param jobParametersConverter |
| 252 | */ |
| 253 | public void setJobParametersConverter(JobParametersConverter jobParametersConverter) { |
| 254 | this.jobParametersConverter = jobParametersConverter; |
| 255 | } |
| 256 | |
| 257 | /** |
| 258 | * Delegate to the exiter to (possibly) exit the VM gracefully. |
| 259 | * |
| 260 | * @param status |
| 261 | */ |
| 262 | public void exit(int status) { |
| 263 | systemExiter.exit(status); |
| 264 | } |
| 265 | |
| 266 | /** |
| 267 | * {@link JobLocator} to find a job to run. |
| 268 | * @param jobLocator a {@link JobLocator} |
| 269 | */ |
| 270 | public void setJobLocator(JobLocator jobLocator) { |
| 271 | this.jobLocator = jobLocator; |
| 272 | } |
| 273 | |
| 274 | /* |
| 275 | * Start a job by obtaining a combined classpath using the job launcher and |
| 276 | * job paths. If a JobLocator has been set, then use it to obtain an actual |
| 277 | * job, if not ask the context for it. |
| 278 | */ |
| 279 | int start(String jobPath, String jobIdentifier, String[] parameters, Set<String> opts) { |
| 280 | |
| 281 | ConfigurableApplicationContext context = null; |
| 282 | |
| 283 | try { |
| 284 | context = new ClassPathXmlApplicationContext(jobPath); |
| 285 | context.getAutowireCapableBeanFactory().autowireBeanProperties(this, |
| 286 | AutowireCapableBeanFactory.AUTOWIRE_BY_TYPE, false); |
| 287 | |
| 288 | Assert.state(launcher != null, "A JobLauncher must be provided. Please add one to the configuration."); |
| 289 | if (opts.contains("-restart") || opts.contains("-next")) { |
| 290 | Assert.state(jobExplorer != null, |
| 291 | "A JobExplorer must be provided for a restart or start next operation. Please add one to the configuration."); |
| 292 | } |
| 293 | |
| 294 | String jobName = jobIdentifier; |
| 295 | |
| 296 | JobParameters jobParameters = jobParametersConverter.getJobParameters(StringUtils |
| 297 | .splitArrayElementsIntoProperties(parameters, "=")); |
| 298 | Assert.isTrue(parameters == null || parameters.length == 0 || !jobParameters.isEmpty(), |
| 299 | "Invalid JobParameters " + Arrays.asList(parameters) |
| 300 | + ". If parameters are provided they should be in the form name=value (no whitespace)."); |
| 301 | |
| 302 | if (opts.contains("-stop")) { |
| 303 | List<JobExecution> jobExecutions = getRunningJobExecutions(jobIdentifier); |
| 304 | if (jobExecutions == null) { |
| 305 | throw new JobExecutionNotRunningException("No running execution found for job=" + jobIdentifier); |
| 306 | } |
| 307 | for (JobExecution jobExecution : jobExecutions) { |
| 308 | jobExecution.setStatus(BatchStatus.STOPPING); |
| 309 | jobRepository.update(jobExecution); |
| 310 | } |
| 311 | return exitCodeMapper.intValue(ExitStatus.COMPLETED.getExitCode()); |
| 312 | } |
| 313 | |
| 314 | if (opts.contains("-abandon")) { |
| 315 | List<JobExecution> jobExecutions = getStoppedJobExecutions(jobIdentifier); |
| 316 | if (jobExecutions == null) { |
| 317 | throw new JobExecutionNotStoppedException("No stopped execution found for job=" + jobIdentifier); |
| 318 | } |
| 319 | for (JobExecution jobExecution : jobExecutions) { |
| 320 | jobExecution.setStatus(BatchStatus.ABANDONED); |
| 321 | jobRepository.update(jobExecution); |
| 322 | } |
| 323 | return exitCodeMapper.intValue(ExitStatus.COMPLETED.getExitCode()); |
| 324 | } |
| 325 | |
| 326 | if (opts.contains("-restart")) { |
| 327 | JobExecution jobExecution = getLastFailedJobExecution(jobIdentifier); |
| 328 | if (jobExecution == null) { |
| 329 | throw new JobExecutionNotFailedException("No failed or stopped execution found for job=" |
| 330 | + jobIdentifier); |
| 331 | } |
| 332 | jobParameters = jobExecution.getJobParameters(); |
| 333 | jobName = jobExecution.getJobInstance().getJobName(); |
| 334 | } |
| 335 | |
| 336 | Job job; |
| 337 | if (jobLocator != null) { |
| 338 | job = jobLocator.getJob(jobName); |
| 339 | } |
| 340 | else { |
| 341 | job = (Job) context.getBean(jobName); |
| 342 | } |
| 343 | |
| 344 | if (opts.contains("-next")) { |
| 345 | JobParameters nextParameters = getNextJobParameters(job); |
| 346 | Map<String, JobParameter> map = new HashMap<String, JobParameter>(nextParameters.getParameters()); |
| 347 | map.putAll(jobParameters.getParameters()); |
| 348 | jobParameters = new JobParameters(map); |
| 349 | } |
| 350 | |
| 351 | JobExecution jobExecution = launcher.run(job, jobParameters); |
| 352 | return exitCodeMapper.intValue(jobExecution.getExitStatus().getExitCode()); |
| 353 | |
| 354 | } |
| 355 | catch (Throwable e) { |
| 356 | String message = "Job Terminated in error: " + e.getMessage(); |
| 357 | logger.error(message, e); |
| 358 | CommandLineJobRunner.message = message; |
| 359 | return exitCodeMapper.intValue(ExitStatus.FAILED.getExitCode()); |
| 360 | } |
| 361 | finally { |
| 362 | if (context != null) { |
| 363 | context.close(); |
| 364 | } |
| 365 | } |
| 366 | } |
| 367 | |
| 368 | /** |
| 369 | * @param jobIdentifier a job execution id or job name |
| 370 | * @param minStatus the highest status to exclude from the result |
| 371 | * @return |
| 372 | */ |
| 373 | private List<JobExecution> getJobExecutionsWithStatusGreaterThan(String jobIdentifier, BatchStatus minStatus) { |
| 374 | |
| 375 | Long executionId = getLongIdentifier(jobIdentifier); |
| 376 | if (executionId != null) { |
| 377 | JobExecution jobExecution = jobExplorer.getJobExecution(executionId); |
| 378 | if (jobExecution.getStatus().isGreaterThan(minStatus)) { |
| 379 | return Arrays.asList(jobExecution); |
| 380 | } |
| 381 | return Collections.emptyList(); |
| 382 | } |
| 383 | |
| 384 | int start = 0; |
| 385 | int count = 100; |
| 386 | List<JobExecution> executions = new ArrayList<JobExecution>(); |
| 387 | List<JobInstance> lastInstances = jobExplorer.getJobInstances(jobIdentifier, start, count); |
| 388 | |
| 389 | while (!lastInstances.isEmpty()) { |
| 390 | |
| 391 | for (JobInstance jobInstance : lastInstances) { |
| 392 | List<JobExecution> jobExecutions = jobExplorer.getJobExecutions(jobInstance); |
| 393 | if (jobExecutions == null || jobExecutions.isEmpty()) { |
| 394 | continue; |
| 395 | } |
| 396 | for (JobExecution jobExecution : jobExecutions) { |
| 397 | if (jobExecution.getStatus().isGreaterThan(minStatus)) { |
| 398 | executions.add(jobExecution); |
| 399 | } |
| 400 | } |
| 401 | } |
| 402 | |
| 403 | start += count; |
| 404 | lastInstances = jobExplorer.getJobInstances(jobIdentifier, start, count); |
| 405 | |
| 406 | } |
| 407 | |
| 408 | return executions; |
| 409 | |
| 410 | } |
| 411 | |
| 412 | private JobExecution getLastFailedJobExecution(String jobIdentifier) { |
| 413 | List<JobExecution> jobExecutions = getJobExecutionsWithStatusGreaterThan(jobIdentifier, BatchStatus.STOPPING); |
| 414 | if (jobExecutions.isEmpty()) { |
| 415 | return null; |
| 416 | } |
| 417 | return jobExecutions.get(0); |
| 418 | } |
| 419 | |
| 420 | private List<JobExecution> getStoppedJobExecutions(String jobIdentifier) { |
| 421 | List<JobExecution> jobExecutions = getJobExecutionsWithStatusGreaterThan(jobIdentifier, BatchStatus.STARTED); |
| 422 | if (jobExecutions.isEmpty()) { |
| 423 | return null; |
| 424 | } |
| 425 | List<JobExecution> result = new ArrayList<JobExecution>(); |
| 426 | for (JobExecution jobExecution : jobExecutions) { |
| 427 | if (jobExecution.getStatus() != BatchStatus.ABANDONED) { |
| 428 | result.add(jobExecution); |
| 429 | } |
| 430 | } |
| 431 | return result.isEmpty() ? null : result; |
| 432 | } |
| 433 | |
| 434 | private List<JobExecution> getRunningJobExecutions(String jobIdentifier) { |
| 435 | List<JobExecution> jobExecutions = getJobExecutionsWithStatusGreaterThan(jobIdentifier, BatchStatus.COMPLETED); |
| 436 | if (jobExecutions.isEmpty()) { |
| 437 | return null; |
| 438 | } |
| 439 | List<JobExecution> result = new ArrayList<JobExecution>(); |
| 440 | for (JobExecution jobExecution : jobExecutions) { |
| 441 | if (jobExecution.isRunning()) { |
| 442 | result.add(jobExecution); |
| 443 | } |
| 444 | } |
| 445 | return result.isEmpty() ? null : result; |
| 446 | } |
| 447 | |
| 448 | private Long getLongIdentifier(String jobIdentifier) { |
| 449 | try { |
| 450 | return new Long(jobIdentifier); |
| 451 | } |
| 452 | catch (NumberFormatException e) { |
| 453 | // Not an ID - must be a name |
| 454 | return null; |
| 455 | } |
| 456 | } |
| 457 | |
| 458 | /** |
| 459 | * @param job the job that we need to find the next parameters for |
| 460 | * @return the next job parameters if they can be located |
| 461 | * @throws JobParametersNotFoundException if there is a problem |
| 462 | */ |
| 463 | private JobParameters getNextJobParameters(Job job) throws JobParametersNotFoundException { |
| 464 | String jobIdentifier = job.getName(); |
| 465 | JobParameters jobParameters; |
| 466 | List<JobInstance> lastInstances = jobExplorer.getJobInstances(jobIdentifier, 0, 1); |
| 467 | |
| 468 | JobParametersIncrementer incrementer = job.getJobParametersIncrementer(); |
| 469 | if (incrementer == null) { |
| 470 | throw new JobParametersNotFoundException("No job parameters incrementer found for job=" + jobIdentifier); |
| 471 | } |
| 472 | |
| 473 | if (lastInstances.isEmpty()) { |
| 474 | jobParameters = incrementer.getNext(new JobParameters()); |
| 475 | if (jobParameters == null) { |
| 476 | throw new JobParametersNotFoundException("No bootstrap parameters found from incrementer for job=" |
| 477 | + jobIdentifier); |
| 478 | } |
| 479 | } |
| 480 | else { |
| 481 | List<JobExecution> lastExecutions = jobExplorer.getJobExecutions(lastInstances.get(0)); |
| 482 | jobParameters = incrementer.getNext(lastExecutions.get(0).getJobParameters()); |
| 483 | } |
| 484 | return jobParameters; |
| 485 | } |
| 486 | |
| 487 | /** |
| 488 | * Launch a batch job using a {@link CommandLineJobRunner}. Creates a new |
| 489 | * Spring context for the job execution, and uses a common parent for all |
| 490 | * such contexts. No exception are thrown from this method, rather |
| 491 | * exceptions are logged and an integer returned through the exit status in |
| 492 | * a {@link JvmSystemExiter} (which can be overridden by defining one in the |
| 493 | * Spring context).<br/> |
| 494 | * Parameters can be provided in the form key=value, and will be converted |
| 495 | * using the injected {@link JobParametersConverter}. |
| 496 | * |
| 497 | * @param args <p> |
| 498 | * <ul> |
| 499 | * <li>-restart: (optional) if the job has failed or stopped and the most |
| 500 | * should be restarted. If specified then the jobIdentifier parameter can be |
| 501 | * interpreted either as the name of the job or the id of teh job execution |
| 502 | * that failed.</li> |
| 503 | * <li>-next: (optional) if the job has a {@link JobParametersIncrementer} |
| 504 | * that can be used to launch the next in a sequence</li> |
| 505 | * <li>jobPath: the xml application context containing a {@link Job} |
| 506 | * <li>jobIdentifier: the bean id of the job or id of the failed execution |
| 507 | * in the case of a restart. |
| 508 | * <li>jobParameters: 0 to many parameters that will be used to launch a |
| 509 | * job. |
| 510 | * </ul> |
| 511 | * The options (<code>-restart, -next</code>) can occur anywhere in the |
| 512 | * command line. |
| 513 | * </p> |
| 514 | */ |
| 515 | public static void main(String[] args) throws Exception { |
| 516 | |
| 517 | CommandLineJobRunner command = new CommandLineJobRunner(); |
| 518 | |
| 519 | List<String> newargs = new ArrayList<String>(Arrays.asList(args)); |
| 520 | |
| 521 | try { |
| 522 | if (System.in.available() > 0) { |
| 523 | BufferedReader reader = new BufferedReader(new InputStreamReader(System.in)); |
| 524 | String line = " "; |
| 525 | while (StringUtils.hasLength(line)) { |
| 526 | if (!line.startsWith("#") && StringUtils.hasText(line)) { |
| 527 | logger.debug("Stdin arg: " + line); |
| 528 | newargs.add(line); |
| 529 | } |
| 530 | line = reader.readLine(); |
| 531 | } |
| 532 | } |
| 533 | } |
| 534 | catch (IOException e) { |
| 535 | logger.warn("Could not access stdin (maybe a platform limitation)"); |
| 536 | if (logger.isDebugEnabled()) { |
| 537 | logger.debug("Exception details", e); |
| 538 | } |
| 539 | } |
| 540 | |
| 541 | Set<String> opts = new HashSet<String>(); |
| 542 | List<String> params = new ArrayList<String>(); |
| 543 | |
| 544 | int count = 0; |
| 545 | String jobPath = null; |
| 546 | String jobIdentifier = null; |
| 547 | |
| 548 | for (String arg : newargs) { |
| 549 | if (VALID_OPTS.contains(arg)) { |
| 550 | opts.add(arg); |
| 551 | } |
| 552 | else { |
| 553 | switch (count) { |
| 554 | case 0: |
| 555 | jobPath = arg; |
| 556 | break; |
| 557 | case 1: |
| 558 | jobIdentifier = arg; |
| 559 | break; |
| 560 | default: |
| 561 | params.add(arg); |
| 562 | break; |
| 563 | } |
| 564 | count++; |
| 565 | } |
| 566 | } |
| 567 | |
| 568 | if (jobPath == null || jobIdentifier == null) { |
| 569 | String message = "At least 2 arguments are required: JobPath and jobIdentifier."; |
| 570 | logger.error(message); |
| 571 | CommandLineJobRunner.message = message; |
| 572 | command.exit(1); |
| 573 | } |
| 574 | |
| 575 | String[] parameters = params.toArray(new String[params.size()]); |
| 576 | |
| 577 | int result = command.start(jobPath, jobIdentifier, parameters, opts); |
| 578 | command.exit(result); |
| 579 | } |
| 580 | |
| 581 | } |