/// <summary>
/// 保存数据更改并同步索引
/// </summary>
/// <returns></returns>
public int SaveChanges(bool index = true)
{
int result = 0;
if (Context.ChangeTracker.HasChanges())
{
// 获取要变更的实体集
var changes = GetChangeset();
result = Context.SaveChanges();
if (changes.HasChanges && index)
{
LuceneIndexer.Update(changes);
}
}
return(result);
}
/// <summary>
/// 保存数据更改并同步索引
/// </summary>
/// <param name="index">是否需要被重新索引</param>
/// <returns></returns>
public async Task <int> SaveChangesAsync(bool index = true)
{
int result = 0;
if (Context.ChangeTracker.HasChanges())
{
// 获取要变更的结果集
var changes = GetChangeset();
result = await Context.SaveChangesAsync();
if (changes.HasChanges && index)
{
LuceneIndexer.Update(changes);
}
}
return(result);
}
/// <summary>
/// 创建指定数据表的索引
/// </summary>
public void CreateIndex(List <string> tables)
{
if (LuceneIndexer == null)
{
return;
}
var index = new List <ILuceneIndexable>();
var properties = Context.GetType().GetProperties();
foreach (var pi in properties)
{
if (typeof(IEnumerable <ILuceneIndexable>).IsAssignableFrom(pi.PropertyType) && tables.Contains(pi.Name))
{
var entities = Context.GetType().GetProperty(pi.Name).GetValue(Context, null);
index.AddRange(entities as IEnumerable <ILuceneIndexable>);
}
}
if (index.Any())
{
LuceneIndexer.CreateIndex(index);
}
}
/// <summary>
/// 搜索引擎
/// </summary>
/// <param name="context">数据库上下文</param>
/// <param name="directory"></param>
/// <param name="analyzer"></param>
/// <param name="memoryCache"></param>
public SearchEngine(TContext context, Directory directory, Analyzer analyzer, IMemoryCache memoryCache)
{
Context = context;
LuceneIndexer = new LuceneIndexer(directory, analyzer);
LuceneIndexSearcher = new LuceneIndexSearcher(directory, analyzer, memoryCache);
}
/// <summary>
/// 删除索引
/// </summary>
public void DeleteIndex()
{
LuceneIndexer?.DeleteAll();
}
