internal GroupCollectorWrapper(int numHits, Collector collector, GroupCollectorField groupCollectorField)
: this(numHits)
{
this._groupCollectorField = groupCollectorField;
this._collector = collector;
}
/// <summary>
/// 字段分组统计(支持分页)
/// </summary>
/// <param name="indexSearcher"></param>
/// <param name="pageSize"></param>
/// <param name="pageIndex"></param>
/// <param name="query"></param>
/// <param name="recordCount"></param>
/// <param name="groupKeyValueList">分组结果</param>
/// <param name="filter"></param>
/// <param name="sortFields"></param>
/// <returns></returns>
public static Dictionary <Document, ScoreDoc> SelectGroup(IndexSearcher indexSearcher, int pageSize, int pageIndex, Query query, out int recordCount, out GroupKeyValueList groupKeyValueList, Filter filter = null, params SortField[] sortFields)
{
recordCount = 0;
groupKeyValueList = null;
Dictionary <Document, ScoreDoc> dictPager = new Dictionary <Document, ScoreDoc>();
int maxDoc = indexSearcher.IndexReader.MaxDoc;
if (maxDoc == 0)
{//返回索引可用的最大的索引ID
return(dictPager);
}
TopDocs docs = null;
string key = string.Format(CACHE_KEY, query.ToString(), string.Join("_", sortFields.Select(item => item.ToString())), filter == null ? string.Empty : filter.ToString());
string listKey = key + string.Format(",PAGE_INDEX:{0},PAGE_SIZE:{1}", pageIndex, pageSize);
string groupKey = "GROUP:::" + key;
docs = MemCache.MemoryCacheBus.Get(listKey) as TopDocs;
groupKeyValueList = MemCache.MemoryCacheBus.Get(groupKey) as GroupKeyValueList;
if (docs == null || groupKeyValueList == null)
{
//https://searchcode.com/codesearch/view/7233825/
int start = pageIndex * pageSize;
start = Math.Min(start, maxDoc);
using (GroupCollectorField groupCollectorField = new GroupCollectorField("NameValue"))
{
if (sortFields.Length > 0)
{//先排序，后分页
Sort sort = new Sort();
sort.SetSort(sortFields);
TopFieldCollector topFieldCollector = TopFieldCollector.Create(sort, start, true, false, false, !query.CreateWeight(indexSearcher).GetScoresDocsOutOfOrder());
GroupCollectorWrapper groupCollectorWrapper = new GroupCollectorWrapper(start, topFieldCollector, groupCollectorField);
indexSearcher.Search(query, filter, groupCollectorWrapper);
start = start - pageSize;
if (start < 0)
{
start = 0;
}
docs = topFieldCollector.TopDocs(start, pageSize);//只返回前start条记录
}
else
{//不支持排序，只有分页
TopScoreDocCollector topScoreDocCollector = TopScoreDocCollector.Create(start + 1, !query.CreateWeight(indexSearcher).GetScoresDocsOutOfOrder());
GroupCollectorWrapper groupCollectorWrapper = new GroupCollectorWrapper(start, topScoreDocCollector, groupCollectorField);
indexSearcher.Search(query, filter, groupCollectorWrapper);
start = start - pageSize;
if (start < 0)
{
start = 0;
}
docs = topScoreDocCollector.TopDocs(start, pageSize); //只返回前start条记录
}
groupCollectorField.GroupKeyValueDocCountList.Sort(); //排序
groupKeyValueList = ObjectExtensions.Clone(groupCollectorField.GroupKeyValueDocCountList);
if (docs != null && groupKeyValueList != null)
{
TimeSpan timeSpan = TimeSpan.FromMinutes(CACHE_TIME);
MemCache.MemoryCacheBus.Insert(groupKey, groupKeyValueList, timeSpan);
MemCache.MemoryCacheBus.Insert(listKey, docs, timeSpan);
}
}
}
#region 返回搜索的结果集合
if (docs != null)
{
recordCount = docs.TotalHits; //搜索结果总数量
ScoreDoc[] scoreDocs = docs.ScoreDocs; //搜索的结果集合
if (scoreDocs != null)
{
foreach (ScoreDoc scoreDoc in scoreDocs)
{
if (scoreDoc.Doc != int.MaxValue && scoreDoc.Score != System.Single.NegativeInfinity)
{
dictPager.Add(indexSearcher.Doc(scoreDoc.Doc), scoreDoc);
}
}
}
}
if (dictPager.Count == 0)
{//如果没有取出符合条件的结果删除缓存。wyp
MemCache.MemoryCacheBus.Delete(listKey);
}
if (groupKeyValueList.Count == 0)
{//如果没有取出符合条件的结果删除缓存。wyp
MemCache.MemoryCacheBus.Delete(groupKey);
}
#endregion
groupKeyValueList = groupKeyValueList ?? new GroupKeyValueList(0);
return(dictPager);
}
