Github user tgravescs commented on a diff in the pull request: https://github.com/apache/spark/pull/21688#discussion_r232735802 --- Diff: core/src/main/scala/org/apache/spark/status/api/v1/StagesResource.scala --- @@ -102,4 +103,120 @@ private[v1] class StagesResource extends BaseAppResource { withUI(_.store.taskList(stageId, stageAttemptId, offset, length, sortBy)) } + // This api needs to stay formatted exactly as it is below, since, it is being used by the + // datatables for the stages page. + @GET + @Path("{stageId: \\d+}/{stageAttemptId: \\d+}/taskTable") + def taskTable( + @PathParam("stageId") stageId: Int, + @PathParam("stageAttemptId") stageAttemptId: Int, + @QueryParam("details") @DefaultValue("true") details: Boolean, + @Context uriInfo: UriInfo): + HashMap[String, Object] = { + withUI { ui => + val uriQueryParameters = uriInfo.getQueryParameters(true) + val totalRecords = uriQueryParameters.getFirst("numTasks") + var isSearch = false + var searchValue: String = null + var filteredRecords = totalRecords + var _tasksToShow: Seq[TaskData] = null + // The datatables client API sends a list of query parameters to the server which contain + // information like the columns to be sorted, search value typed by the user in the search + // box, pagination index etc. For more information on these query parameters, + // refer https://datatables.net/manual/server-side. + if (uriQueryParameters.getFirst("search[value]") != null && + uriQueryParameters.getFirst("search[value]").length > 0) { + _tasksToShow = doPagination(uriQueryParameters, stageId, stageAttemptId, true, + totalRecords.toInt) + isSearch = true + searchValue = uriQueryParameters.getFirst("search[value]") + } else { + _tasksToShow = doPagination(uriQueryParameters, stageId, stageAttemptId, false, + totalRecords.toInt) + } + val ret = new HashMap[String, Object]() + if (_tasksToShow.nonEmpty) { + // Performs server-side search based on input from user + if (isSearch) { + val filteredTaskList = filterTaskList(_tasksToShow, searchValue) + filteredRecords = filteredTaskList.length.toString + if (filteredTaskList.length > 0) { + val pageStartIndex = uriQueryParameters.getFirst("start").toInt + val pageLength = uriQueryParameters.getFirst("length").toInt + ret.put("aaData", filteredTaskList.slice(pageStartIndex, pageStartIndex + pageLength)) + } else { + ret.put("aaData", filteredTaskList) + } + } else { + ret.put("aaData", _tasksToShow) + } + } else { + ret.put("aaData", _tasksToShow) + } + ret.put("recordsTotal", totalRecords) + ret.put("recordsFiltered", filteredRecords) + ret + } + } + + // Performs pagination on the server side + def doPagination(queryParameters: MultivaluedMap[String, String], stageId: Int, + stageAttemptId: Int, isSearch: Boolean, totalRecords: Int): Seq[TaskData] = { + val queryParams = queryParameters.keySet() + var columnNameToSort = queryParameters.getFirst("columnNameToSort") + if (columnNameToSort.equalsIgnoreCase("Logs")) { + columnNameToSort = "Index" + } + val isAscendingStr = queryParameters.getFirst("order[0][dir]") + var pageStartIndex = 0 + var pageLength = totalRecords + if (!isSearch) { --- End diff -- lets add comment about not trimming since search wants to look at all results
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