2-3 minutes ? There must be something seriously wrong because there is no way it should take so long to populate a CellTable.
1.) Profile your web-app. What does take so long (serialization or rendering)? use Chrome Dev Tools to do that. 2.) Use paging. From a UX point of view it doesn't make sense to show all rows at once. 3.) Transfer chunks of data (using AsyncDataProvider) because as of point 2 the user doesn't need to see all rows at once. On Monday, July 1, 2013 7:58:02 PM UTC+2, [email protected] wrote: > > Hi everybody, > I'm creating a website with GWT. I want to add CellTable into my project. > The problem is that I have a lot of data to put into the tables. So, my > website freeze and show my table after 2-3 minutes. > > I find on internet that multi-threads are impossible with GWT. So, what is > the solution? Even if the user have to wait 2-3 minutes, I want to avoid > the fact that it's freezing. > > Any Ideas? > > Thank you. > > My code, maybe I can optimize it simply? > > public void refreshTable(final ArrayList<String> arrListFilters, final > ArrayList<String> arrListAll, String url) { > > // Get the CQ result > RequestBuilder builder = new RequestBuilder(RequestBuilder.GET, url); > > try { > Request response = builder.sendRequest(null, new RequestCallback() { > public void onError(Request request, Throwable exception) { > } > > public void onResponseReceived(Request request, Response response) { > final json json = JsonUtils.unsafeEval(response.getText()); > > int i = 0; > int j = 0; > int tot; > > // If there are too many results > if (json.getResultslength() > 10000) { > tot = 10000; > } else { > tot = json.getResultslength(); > } > > // Fill the list of rows > while (j < tot) { > i = 1; > List<String> rowTemp = new ArrayList<String>(); > rowTemp.add(json.getDate(j)); > // Get the data to get a price result for a specific > // customer query > arrListLnNb.add(json.getLineNb(j)); > arrListId.add(json.getId(j)); > arrListCqid.add(json.getCqid(j)); > while (i < arrListFilters.size()) { > rowTemp.add(json.getResults(j, arrListAll.indexOf(arrListFilters.get(i)))); > > i = i + 1; > } > rowTemp.add(""); > rows.add(rowTemp); > j = j + 1; > > } > > // Provide rows to the table > table.setRowCount(rows.size(), true); > table.setRowData(0, rows); > > final ListDataProvider<List<String>> provider = new > ListDataProvider<List<String>>(rows); > > provider.addDataDisplay(table); > > // Handler to sort the columns > List<List<String>> list1 = provider.getList(); > > ListHandler<List<String>> columnSortHandler = new > ListHandler<List<String>>(list1); > i = 0; > while (i < table.getColumnCount()) { > final int columnIndex = i; > columnSortHandler.setComparator(table.getColumn(i), new > Comparator<List<String>>() { > public int compare(List<String> o1, List<String> o2) { > > if (o1 == o2) { > return 0; > } > > // Compare the name columns. > if (o1 != null) { > return (o2 != null) ? o1.get(columnIndex).compareTo(o2.get(columnIndex)) : > 1; > } > return -1; > > } > }); > > i = i + 1; > } > > table.addColumnSortHandler(columnSortHandler); > > i = 0; > while (i < table.getColumnCount()) { > table.getColumnSortList().push(table.getColumn(i)); > i = i + 1; > } > } > > }); > } catch (RequestException e) { > } > } > -- You received this message because you are subscribed to the Google Groups "Google Web Toolkit" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/google-web-toolkit. For more options, visit https://groups.google.com/groups/opt_out.
