Groovy Liferay Document Library find

Groovy Liferay

############### generates 
Caused by: java.lang.Exception: java.lang.OutOfMemoryError: Java heap space
	at com.liferay.portal.kernel.messaging.proxy.ProxyRequest.execute(ProxyRequest.java:66)
##############	



import com.liferay.portal.service.ServiceContext;
import com.liferay.portal.kernel.util.DateUtil;
import com.liferay.portal.kernel.util.OrderByComparator;
import com.liferay.portal.kernel.util.OrderByComparatorFactoryUtil;
import com.liferay.portal.kernel.util.OrderByComparatorFactory;
import com.liferay.portlet.documentlibrary.model.*;
import com.liferay.portlet.documentlibrary.service.*;
import com.liferay.portlet.documentlibrary.service.persistence.*;

// long companyId
companyId = 10154
// long groupId
groupId = 193310
def parentFolderId1 = 0
def start = -1 
def end = -1
def OrderByComparatorFactory orderByComparatorFactory = OrderByComparatorFactoryUtil.getOrderByComparatorFactory()
def OrderByComparator obcFolder= orderByComparatorFactory.create('DLFolder', 'name', true)
def OrderByComparator obcFile= orderByComparatorFactory.create('DLFileEntry', 'title', true)

def getMyFolders
getMyFolders = { groupId, parentFolderId, depth ->

	def folders = DLFolderLocalServiceUtil.getFolders(groupId, parentFolderId, start, end, obcFolder)
	println(parentFolderId+' folders found:'+ folders.size() )

	for( i=0; i<folders.size();i++){
		def folder = folders[i]
		println('folder depth:'+depth)
		println('folder:'+folder.getName()+' uuid='+folder.getUuid() + ' folderId=' + folder.getFolderId() )
		
		def files = DLFileEntryLocalServiceUtil.getFileEntries(groupId, folder.getFolderId(), start, end, obcFile)
		println('>> files found:'+ files.size())
		for( i=0; i<files.size();i++){
			def file = files[i]
			println('file:'+file.getTitle()+ ' title:' +file.getTitle()+' uuid='+folder.getUuid())
		}	
		def newParentFolderId  = folder.getFolderId(); 
		getMyFolders(groupId, newParentFolderId, depth++);
	}	

}


try{
	getMyFolders(groupId, parentFolderId1,0)

} catch (Exception e) {
	println(e)
}