Example 1. PersonController
The person controller still handles delete and search.
@Controller
public class PersonController {
final Logger logger = LoggerFactory.getLogger(PersonController.class);
static final String SEARCH_VIEW_PATH_KEY = "/person/search";
private static final String SEARCH_VIEW_KEY = "redirect:search.html";
private static final String SEARCH_MODEL_KEY = "persons";
@Autowired
protected PersonDao personDao = null;
/**
* <p>Deletes a person.</p>
*
* <p>Expected HTTP POST and request '/person/delete'.</p>
*/
@RequestMapping(value="/person/delete", method=RequestMethod.POST)
public String delete(Person person) {
personDao.delete(person);
return SEARCH_VIEW_KEY;
}
/**
* <p>Searches for all persons and returns them in a
* <code>Collection</code>.</p>
*
* <p>Expected HTTP GET and request '/person/search'.</p>
*/
@RequestMapping(value="/person/search", method=RequestMethod.GET)
public @ModelAttribute(SEARCH_MODEL_KEY) Collection<Person> search() {
return personDao.findPersons();
}
}
Example 2. PersonFlowHandler
At the end of the flow and when exception occurs that the flow doesn't handle, the PersonFlowHandler redirects to the search page.
@Component
public class PersonFlowHandler extends AbstractFlowHandler {
/**
* Where the flow should go when it ends.
*/
@Override
public String handleExecutionOutcome(FlowExecutionOutcome outcome,
HttpServletRequest request, HttpServletResponse response) {
return getContextRelativeUrl(PersonController.SEARCH_VIEW_PATH_KEY);
}
/**
* Where to redirect if there is an exception not handled by the flow.
*/
@Override
public String handleException(FlowException e,
HttpServletRequest request, HttpServletResponse response) {
if (e instanceof NoSuchFlowExecutionException) {
return getContextRelativeUrl(PersonController.SEARCH_VIEW_PATH_KEY);
} else {
throw e;
}
}
/**
* Gets context relative url with an '.html' extension.
*/
private String getContextRelativeUrl(String view) {
return "contextRelative:" + view + ".html";
}
}