boolean onSuccessFromCreateForm() {
// We want to tell our containing page explicitly what course we've
// created, so we trigger new event
// "successfulCreate" with a parameter. It will bubble up because we
// don't have a handler method for it.
componentResources.triggerEvent(SUCCESSFUL_CREATE, new Object[] {course.getUuid()}, null);
// We don't want "success" to bubble up, so we return true to say we've
// handled it.
mode = Mode.REVIEW;
courseUuid = course.getUuid();
return true;
}
boolean onFailureFromUpdateForm() {
versionFlash = course.getVersion();
// Rather than letting "failure" bubble up which doesn't say what you
// were trying to do, we trigger new event
// "failedUpdate". It will bubble up because we don't have a handler
// method for it.
componentResources.triggerEvent(FAILED_UPDATE, new Object[] {courseUuid}, null);
// We don't want "failure" to bubble up, so we return true to say we've
// handled it.
return true;
}
void onValidateFromCreateForm() {
if (createForm.getHasErrors()) {
// We get here only if a server-side validator detected an error.
return;
}
try {
course =
courseManagerService.createCourse(
course.getCode(), course.getName(), course.getSummary(), course.getDescription(), 1);
} catch (RestClientFailureException e) {
createForm.recordError("Internal error on server.");
createForm.recordError(e.getMessage());
// TODO: replace with exception service
LOG.debug("internal error on server during validation", e);
} catch (Exception e) {
createForm.recordError(ExceptionUtil.getRootCauseMessage(e));
// TODO: replace with exception service
LOG.info("unhandled exception during validation", e);
}
}
void onValidateFromUpdateForm() {
if (updateForm.getHasErrors()) {
// We get here only if a server-side validator detected an error.
return;
}
try {
courseManagerService.updateCourse(
course, course.getName(), course.getSummary(), course.getDescription(), 1);
} catch (RestClientFailureException e) {
updateForm.recordError("Internal error on server.");
updateForm.recordError(e.getMessage());
// TODO: replace with exception service
LOG.debug("internal error on server during validation", e);
} catch (Exception e) {
// Display the cause. In a real system we would try harder to get a
// user-friendly message.
updateForm.recordError(ExceptionUtil.getRootCauseMessage(e));
// TODO: replace with exception service
LOG.info("unhandled exception during validation", e);
}
}
void onPrepareForRenderFromUpdateForm() {
if (!StudentUtil.isPossibleUuid(courseUuid)) {
LOG.info("Invalid CourseUUID");
courseUuid = null;
course = null;
} else {
try {
course = courseFinderService.findCourseByUuid(courseUuid);
} catch (ObjectNotFoundException e) {
// Handle null course in the template.
LOG.trace("course not found: " + courseUuid);
}
}
// If the form has errors then we're redisplaying after a redirect.
// Form will restore your input values but it's up to us to restore
// Hidden values.
if (updateForm.getHasErrors()) {
if (course != null) {
course.setVersion(versionFlash);
}
}
}