private PauseBean getPauseBean(String submissionQueueName) {
IQueueReader<PauseBean> qr = null;
try {
qr = eservice.createQueueReader(getUri(), EventConstants.CMD_SET);
qr.setBeanClass(PauseBean.class);
List<PauseBean> pausedList = qr.getQueue();
// The most recent bean in the queue is the latest
for (PauseBean pauseBean : pausedList) {
if (submissionQueueName.equals(pauseBean.getQueueName())) return pauseBean;
}
} catch (Exception ne) {
logger.error("Cannot get queue " + EventConstants.CMD_SET, ne);
return null;
} finally {
try {
if (qr != null) qr.disconnect();
} catch (EventException e) {
logger.error("Cannot get disconnect " + EventConstants.CMD_SET, e);
}
}
return null;
}
protected void togglePausedConsumer(IAction pauseConsumer) {
// The button can get out of sync if two clients are used.
final boolean currentState = queueConnection.isQueuePaused(getSubmissionQueueName());
try {
pauseConsumer.setChecked(!currentState); // We are toggling it.
IPublisher<PauseBean> pauser = service.createPublisher(getUri(), IEventService.CMD_TOPIC);
pauser.setStatusSetName(IEventService.CMD_SET); // The set that other clients may check
pauser.setStatusSetAddRequired(true);
PauseBean pbean = new PauseBean();
pbean.setQueueName(getSubmissionQueueName()); // The queue we are pausing
pbean.setPause(pauseConsumer.isChecked());
pauser.broadcast(pbean);
} catch (Exception e) {
ErrorDialog.openError(
getViewSite().getShell(),
"Cannot pause queue " + getSubmissionQueueName(),
"Cannot pause queue "
+ getSubmissionQueueName()
+ "\n\nPlease contact your support representative.",
new Status(IStatus.ERROR, "org.eclipse.scanning.event.ui", e.getMessage()));
}
pauseConsumer.setChecked(queueConnection.isQueuePaused(getSubmissionQueueName()));
}
protected void processPause(PauseBean bean) {
try {
if (bean.isPause()) {
pause();
} else {
resume();
}
} catch (Exception ne) {
ne.printStackTrace();
logger.error(
"Unable to process pause command on consumer '" + getName() + "'. Consumer will stop.",
ne);
try {
stop();
disconnect();
} catch (EventException e) {
logger.error(
"An internal error occurred trying to terminate the consumer "
+ getName()
+ " "
+ getConsumerId());
}
}
}
