All, So far I've had a very good experience working with the LDAP API. I have used it as part of a service-oriented application that does passes data between an RDB and Active Directory (via its LDAP interface).
I have just begun attempting to utilize the Paging logic, but am running into a problem. It seems that I am able to get a "Paged" result just fine. When the result is only 1 page long, there is no issue. However, I'm obviously missing the mechanism by which the Page is advanced to the next collection of AD results. Thus, when there are multiple pages, I just keep processing the first page over, and over... I haven't been able to find much information anywhere on the internet. This SO post seems reasonably close: https://stackoverflow.com/questions/17963975/apache-directory-ldap-paged-searches ...but fails to advance the page. What follows is a somewhat abbreviated version of what I've got--can someone tell me what I'm missing?? // form up the search request SearchRequest searchRequest = new SearchRequestImpl(); ... // set the interface-level search parameters for the (initial) search PagedResults pagedResultsDecorator = new PagedResultsDecorator(ldc.getCodecService()); pagedResultsDecorator.setSize(REQUESTED_PAGE_SIZE); searchRequest.addControl(pagedResultsDecorator); SearchCursor searchCursor = null; try { int pageNum = 0; // set the interface-level search parameters for the initial search SearchRequest searchRequest = createSearchRequest(ldc, filterString); while (true) { // Search for the next page of results searchCursor = ldc.search(searchRequest); pageNum++; LOG.debug("Now processing page [{}] of AD search results", pageNum); // pull all results from the current batch of results that the cursor points to while (searchCursor.next()) { Response response = searchCursor.get(); if (response instanceof SearchResultEntry) { Entry resultEntry = ((SearchResultEntry) response).getEntry(); entriesQ.put(resultEntry); } else { LOG.trace("element of response is NOT instanceof SearchResultEntry, it is [{}]", response.getClass()); } } // IF PAGING is supported ... if (ldc.isControlSupported(PagedResults.OID)) { SearchResultDone searchResultDoneObject = searchCursor.getSearchResultDone(); // AND IF we received a valid search completion object in the results if (null != searchResultDoneObject) { ResultCodeEnum resultCode = searchResultDoneObject.getLdapResult().getResultCode(); // IF the search was SUCCESSFUL... if (ResultCodeEnum.SUCCESS == resultCode) { PagedResults pagedResults = (PagedResults) searchResultDoneObject.getControl(PagedResults.OID); // if we've just processed the last PAGE of data, then exit the loop // FIXME: hackish/non-obvious, but not sure if better way exists... byte[] cookie = pagedResults.getCookie(); if ((null == cookie) || (0 == pagedResults.getCookie().length)) { LOG.trace("Final PAGE of data processed"); break; } else { // otherwise, re-set the decorator for next page of results // // ASSUME I SHOULD BE SETTING SOMETHING HERE . . . // pagedResults.setSize(REQUESTED_PAGE_SIZE); pagedResults.setCookie(cookie); <-------------CAN/SHOULD THE COOKIE BE MANIPULATED? } // sleep to meter results, moderate memory utilization try { Thread.sleep(2000L); } catch (InterruptedException ie) { LOG.warn("Failed to pause between pages of AD records!", ie); } } // ELSE IF the server curtailed our search results due to some restriction, throw an exception else if (ResultCodeEnum.UNWILLING_TO_PERFORM == resultCode) { // error handling... } // OTHERWISE - unknown error else { // error handling... } } // The search failed else { // error handling... } } // ELSE - we are processing a NON-PAGED result set else { LOG.error("We should never get here, as we are requesting PAGED results!"); } } } catch ( various exceptions) { // error handling... } finally { // close the cursor & ensure the connection has been closed } Thanks, Hans
