Example usage for org.springframework.batch.core.launch.support JobRegistryBackgroundJobRunner register

Introduction

In this page you can find the example usage for org.springframework.batch.core.launch.support JobRegistryBackgroundJobRunner register.

Prototype

private void register(String[] paths) throws DuplicateJobException, IOException 

Source Link

Usage

From source file:org.springframework.batch.core.launch.support.JobRegistryBackgroundJobRunner.java

/**
 * Supply a list of application context locations, starting with the parent
 * context, and followed by the children. The parent must contain a
 * {@link JobRegistry} and the child contexts are expected to contain
 * {@link Job} definitions, each of which will be registered wit the
 * registry./*from   w  ww .j  a va 2  s  .com*/
 *
 * Example usage:
 *
 * <pre>
 * $ java -classpath ... JobRegistryBackgroundJobRunner job-registry-context.xml job1.xml job2.xml ...
 * </pre>
 *
 * The child contexts are created only when needed though the
 * {@link JobFactory} interface (but the XML is validated on startup by
 * using it to create a {@link BeanFactory} which is then discarded).
 *
 * The parent context is created in a separate thread, and the program will
 * pause for input in an infinite loop until the user hits any key.
 *
 * @param args the context locations to use (first one is for parent)
 * @throws Exception if anything goes wrong with the context creation
 */
public static void main(String... args) throws Exception {

    Assert.state(args.length >= 1, "At least one argument (the parent context path) must be provided.");

    final JobRegistryBackgroundJobRunner launcher = new JobRegistryBackgroundJobRunner(args[0]);
    errors.clear();

    logger.info("Starting job registry in parent context from XML at: [" + args[0] + "]");

    new Thread(new Runnable() {
        @Override
        public void run() {
            try {
                launcher.run();
            } catch (RuntimeException e) {
                errors.add(e);
                throw e;
            }
        }
    }).start();

    logger.info("Waiting for parent context to start.");
    while (launcher.parentContext == null && errors.isEmpty()) {
        Thread.sleep(100L);
    }

    synchronized (errors) {
        if (!errors.isEmpty()) {
            logger.info(errors.size() + " errors detected on startup of parent context.  Rethrowing.");
            throw errors.get(0);
        }
    }
    errors.clear();

    // Paths to individual job configurations.
    final String[] paths = new String[args.length - 1];
    System.arraycopy(args, 1, paths, 0, paths.length);

    logger.info("Parent context started.  Registering jobs from paths: " + Arrays.asList(paths));
    launcher.register(paths);

    if (System.getProperty(EMBEDDED) != null) {
        launcher.destroy();
        return;
    }

    synchronized (JobRegistryBackgroundJobRunner.class) {
        System.out.println(
                "Started application.  Interrupt (CTRL-C) or call JobRegistryBackgroundJobRunner.stop() to exit.");
        JobRegistryBackgroundJobRunner.class.wait();
    }
    launcher.destroy();

}

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