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"; } }