I am fetching Group member from my active directory in which there are lot of records. I wanted to add Pagination support while retrieving it. is there any way unboundid support it.
Or i have manually add pagination.
I assume you are referring to the maxRangeValue
constraints within Microsoft Active Directory. We are using code similar to:
package com.willeke.ldap.microsoft;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Iterator;
import java.util.List;
import org.apache.log4j.Logger;
import com.unboundid.ldap.sdk.Attribute;
import com.unboundid.ldap.sdk.LDAPConnection;
import com.unboundid.ldap.sdk.LDAPException;
import com.unboundid.ldap.sdk.SearchRequest;
import com.unboundid.ldap.sdk.SearchResultEntry;
import com.unboundid.ldap.sdk.SearchScope;
/**
* @author jim@willeke.com
*
*/
public class RangeBasedSearch
{
static String thisClass = RangeBasedSearch.class.getName();
static Logger log = Logger.getLogger(thisClass);
/**
* We can dynamically get the range step value if we get retrieve all attribute names. The range step will be in an attribute like: member;range=0-1499
*
* @param idv_searchldc
* @param basedn
* @param filter
* @param return_attribute
* @return
* @throws LDAPException
*/
public static int getRangeStepValue(LDAPConnection idv_searchldc, String basedn, String filter, String return_attribute) throws LDAPException {
SearchRequest searchRequest = new SearchRequest(basedn, SearchScope.BASE, filter, SearchRequest.ALL_USER_ATTRIBUTES);
List<SearchResultEntry> rangedEntries = idv_searchldc.search(searchRequest).getSearchEntries();
for (Iterator<SearchResultEntry> iterator = rangedEntries.iterator(); iterator.hasNext();) {
SearchResultEntry searchResultEntry = iterator.next();
Collection<Attribute> allAttribute = searchResultEntry.getAttributes();
for (Iterator<Attribute> attributeIterator = allAttribute.iterator(); attributeIterator.hasNext();) {
Attribute attribute = attributeIterator.next();
log.debug("---> " + attribute.getName());
String rangeCheckAttribute = return_attribute + ";range=0-";
if (attribute.getName().contains(rangeCheckAttribute)) {
int rangeStep = Integer.parseInt(attribute.getName().substring(attribute.getName().lastIndexOf(rangeCheckAttribute) + rangeCheckAttribute.length()));
log.debug("Range Step is: " + rangeStep);
return rangeStep;
} else {
return 0; //rangebasedSearchNot Needed
}
}
}
return 0;
}
public static List<String> getAttributeRangeBasedSearch(LDAPConnection ldc, String basedn, String filter, String return_attribute) throws LDAPException {
int step = getRangeStepValue(ldc, basedn, filter, return_attribute);
return getAttributeRangeBasedSearch(ldc, basedn, filter, return_attribute, step);
}
/**
*
* @param ldc
* @param basedn
* @param filter
* @param step
* - How can we dynamically determine the step?
* @param return_attribute
* @return
* @throws LDAPException
*/
public static List<String> getAttributeRangeBasedSearch(LDAPConnection ldc, String basedn, String filter, String return_attribute, int step) throws LDAPException {
int initialStep = step;
List<String> allValues = new ArrayList<String>();
// initialize counter to total the return_attribute values and range values
int start = 0;
int finish = step;
boolean finallyFinished = false;
String range;
// loop through the query until we have all the results
while (!finallyFinished) {
range = start + "-" + finish;
String currentRange = null;
if(step==0) {
currentRange = return_attribute;
} else {
currentRange = return_attribute + ";Range=" + range;
}
String range_returnedAtts[] = { currentRange };
SearchRequest searchRequest = new SearchRequest(basedn, SearchScope.BASE, filter, range_returnedAtts);
List<SearchResultEntry> rangedEntries = ldc.search(searchRequest).getSearchEntries();
for (Iterator<SearchResultEntry> iterator = rangedEntries.iterator(); iterator.hasNext();) {
SearchResultEntry searchResultEntry = iterator.next();
Collection<Attribute> allAttribute = searchResultEntry.getAttributes();
for (Iterator<Attribute> attributeIterator = allAttribute.iterator(); attributeIterator.hasNext();) {
Attribute attribute = attributeIterator.next();
log.debug("---> " + attribute.getName());
// The last batch returns this as member;range=28500-*
if (attribute.getName().endsWith("*")||step==0) {
currentRange = attribute.getName();
finallyFinished = true;
}
String[] attributeBatch = searchResultEntry.getAttributeValues(currentRange);
for (int i = 0; i < attributeBatch.length; i++) {
allValues.add(attributeBatch[i]);
// log.debug("-- " + allvalues++ + " " + attribute.getName() + ":" + attributeBatch[i]);
}
}
}// for SearchResultEntry
start = finish + 1;
finish = finish + step;
}// finallyFinished
log.info("Total " + return_attribute + " Entries found: " + allValues.size() + " ( initialStep=" + initialStep + ")");
return allValues;
}
}
-jim