protected void processRequest(HttpServletRequest req, HttpServletResponse res, HTTPMethods method)
throws ServletException, IOException {
res.setHeader("Access-Control-Allow-Origin", "*");
res.setHeader("Access-Control-Allow-Origin", "*");
String pathInfo = req.getPathInfo();
// Collect all parameter
Map<String, String> params = new HashMap<>();
Map names = req.getParameterMap();
if (names != null) {
for (Object key : names.keySet()) {
params.put(
URLDecoder.decode((String) key, "UTF-8"),
URLDecoder.decode(req.getParameter((String) key), "UTF-8"));
}
}
// default template is json
String templateKey = "json";
if (params.containsKey(Helper.Keys.OutputParam)) {
String tempKey = params.get(Helper.Keys.OutputParam);
if (tempKey != null && !tempKey.equals("")) {
templateKey = tempKey;
}
}
TemplateResult result = null;
try {
if (pathInfo != null && !pathInfo.equals("")) {
// request: /{recommender-id}
pathInfo = pathInfo.substring(1);
String[] split = pathInfo.split("/");
if (split.length == 1) {
params.put(Helper.Keys.RecommenderId, split[0]);
result =
handler.process(
RecommenderController.RecommenderRequestAction.Recommend, templateKey, params);
}
}
} catch (Exception e) {
e.printStackTrace();
}
if (result == null) {
// out.println("TODO print error");
} else {
res.setContentType(result.getContentType());
res.setCharacterEncoding(result.getCharset().name());
res.setStatus(result.getStatus());
PrintWriter out = res.getWriter();
Helper.copy(out, result.getResult());
}
}
private TemplateResult getItems(
DataAccess access, DataTemplate template, Map<String, String> param) throws BaseException {
DataSource dataSource = getDataSource(access, param.get(Helper.Keys.SourceId));
if (dataSource.getState() != DataInformation.DataState.READY)
throw new NotReadyException("The datasource %s is not yet ready.", dataSource.getId());
Item[] items = dataSource.getItems();
items = Helper.applyPaging(items, param);
return template.transform(items);
}
private TemplateResult getInteraction(
DataAccess access, DataTemplate template, Map<String, String> param) throws BaseException {
DataSource dataSource = getDataSource(access, param.get(Helper.Keys.SourceId));
if (dataSource.getState() != DataInformation.DataState.READY)
throw new NotReadyException("The datasource %s is not yet ready.", dataSource.getId());
String itemId = param.get(Helper.Keys.ItemId);
String userId = param.get(Helper.Keys.UserId);
Interaction[] interaction = dataSource.getInteractions(itemId, userId);
interaction = Helper.applyPaging(interaction, param);
return template.transform(interaction);
}
