Examples of org.exist.storage.SystemTask

org.exist.storage.SystemTask
Interface to be implemented by tasks used for system maintenance. System tasks require the database to be in a consistent state. All database operations will be stopped until the {@link #execute(DBBroker)} method returnedor throws an exception. Any exception will be caught and a warning written to the log. A task can be scheduled for execution via {@link BrokerPool#triggerSystemTask(SystemTask)} or{@link org.exist.scheduler.Scheduler}. IMPORTANT: SystemTask implementations should avoid to acquire locks on collections! Doing so may lead to a deadlock situation. The system task runs in a privileged mode. Locking collections and resources is not required as no other transactions will be taking place. @author wolf


    @Override
    public final void execute(final JobExecutionContext jec) throws JobExecutionException {
        final JobDataMap jobDataMap = jec.getJobDetail().getJobDataMap();
        final BrokerPool pool = (BrokerPool)jobDataMap.get("brokerpool");
        final SystemTask task = ( SystemTask )jobDataMap.get("systemtask");


        //if invalid arguments then abort
        if((pool == null) || (task == null)) {


            //abort all triggers for this job

View Full Code Here

                try {
                    final Class<?> jobClass = Class.forName(jobConfig.getResourceName());
                    final Object jobObject = jobClass.newInstance();
                    if(jobConfig.getType().equals(JobType.SYSTEM)) {
                        if(jobObject instanceof SystemTask) {
                            final SystemTask task = (SystemTask)jobObject;
                            task.configure(config, jobConfig.getParameters());
                            job = new SystemTaskJobImpl(jobConfig.getJobName(), task);
                        } else {
                            LOG.error("System jobs must extend SystemTask");
                            // throw exception? will be handled nicely
                        }

View Full Code Here


    @Override
    public void triggerCheck(String output, String backup, String incremental) {
        try {
            this.output = output;
            final SystemTask task = new ConsistencyCheckTask();
            final Properties properties = parseParameter(output, backup, incremental);
            task.configure(pool.getConfiguration(), properties);
            pool.triggerSystemTask(task);


        } catch (final EXistException existException) {
            taskstatus.setStatus(TaskStatus.Status.STOPPED_ERROR);

View Full Code Here

                final XPathException xPathException = new XPathException(this, className + " is not an instance of org.exist.storage.SystemTask");
                logger.error("Java classname is not a SystemTask", xPathException);
        throw xPathException;
            }


            final SystemTask task = (SystemTask) taskObject;
            task.configure(context.getBroker().getConfiguration(), properties);
            LOG.info("Triggering SystemTask: " + className);
            context.getBroker().getBrokerPool().triggerSystemTask(task);


        } catch (final ClassNotFoundException e) {
            final String message = "system task class '" + className + "' not found";

View Full Code Here

TOP

Related Classes of org.exist.storage.SystemTask

org.exist.management.impl.SanityReport

org.exist.scheduler.impl.QuartzSchedulerImpl

org.exist.scheduler.impl.SystemTaskJobImpl

org.exist.xquery.functions.system.TriggerSystemTask

All source code are property of their respective owners. Java is a trademark of Sun Microsystems, Inc and owned by ORACLE Inc. Contact coftware#gmail.com.