Object onDelete(String courseUuid) {
if (!StudentUtil.isPossibleUuid(courseUuid)) {
LOG.info("Invalid CourseUUID");
courseUuid = null;
course = null;
return this;
}
this.courseUuid = courseUuid;
int courseVersion = 0;
try {
courseManagerService.deleteCourse(courseUuid, courseVersion);
} catch (ObjectNotFoundException e) {
// object has already been deleted.
LOG.trace("course not found: " + courseUuid);
} catch (RestClientFailureException e) {
createForm.recordError("Internal error on server.");
createForm.recordError(e.getMessage());
// Display the cause. In a real system we would try harder to get a
// user-friendly message.
deleteMessage = ExceptionUtil.getRootCauseMessage(e);
// Trigger new event "failedDelete" which will bubble up.
componentResources.triggerEvent(FAILED_DELETE, new Object[] {courseUuid}, null);
// We don't want "delete" to bubble up, so we return true to say
// we've handled it.
// TODO: replace with exception service
LOG.debug("internal error on server during validation", e);
return true;
} catch (Exception e) {
// Display the cause. In a real system we would try harder to get a
// user-friendly message.
deleteMessage = ExceptionUtil.getRootCauseMessage(e);
// Trigger new event "failedDelete" which will bubble up.
componentResources.triggerEvent(FAILED_DELETE, new Object[] {courseUuid}, null);
// We don't want "delete" to bubble up, so we return true to say
// we've handled it.
// TODO: replace with exception service
LOG.info("unhandled exception during deletion", e);
return true;
}
// Trigger new event "successfulDelete" which will bubble up.
componentResources.triggerEvent(SUCCESFUL_DELETE, new Object[] {courseUuid}, null);
// We don't want "delete" to bubble up, so we return true to say we've
// handled it.
return indexPage;
}
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 onPrepareForSubmitFromUpdateForm() {
// Get objects for the form fields to overlay.
if (!StudentUtil.isPossibleUuid(courseUuid)) {
LOG.info("Invalid CourseUUID");
courseUuid = null;
course = new Course();
} else {
try {
course = courseFinderService.findCourseByUuid(courseUuid);
} catch (ObjectNotFoundException e) {
course = new Course();
updateForm.recordError("Course has been deleted by another process.");
LOG.trace("course not found: " + courseUuid);
}
}
}
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);
}
}
}