public HttpResponseMessage Get(string query, [FromUri] string[] sort)
{
int results;
var keys = Search.Query(query, sort, Paging.Start, Paging.PageSize, out results);
var list = new List<FileHeader>();
Storage.Batch(accessor => list.AddRange(keys.Select(accessor.ReadFile).Where(x => x != null)));
var result = new SearchResults
{
Start = Paging.Start,
PageSize = Paging.PageSize,
Files = list,
FileCount = results
};
return this.GetMessageWithObject(result);
}
private SearchResults GetSmallest(SearchResults[] searchResults, int[] indexes, int[] originalIndexes, string[] sortFields)
{
FileHeader smallest = null;
var smallestIndex = -1;
for (var i = 0; i < searchResults.Length; i++)
{
var pos = indexes[i] - originalIndexes[i];
if (pos >= searchResults[i].FileCount)
continue;
var current = searchResults[i].Files[pos];
if (smallest != null && CompareFileInfos(current, smallest, sortFields) >= 0)
continue;
smallest = current;
smallestIndex = i;
}
if (smallestIndex != -1)
indexes[smallestIndex]++;
return new SearchResults
{
FileCount = 1,
Files = new List<FileHeader> { smallest }
};
}
public async Task<SearchResults> SearchAsync(string query, string[] sortFields = null, int pageSize = 25, ShardPagingInfo pagingInfo = null)
{
if (pagingInfo == null)
pagingInfo = new ShardPagingInfo(Clients.Count);
var indexes = pagingInfo.GetPagingInfo(pagingInfo.CurrentPage);
if (indexes == null)
{
var lastPage = pagingInfo.GetLastPageNumber();
if (pagingInfo.CurrentPage - lastPage > 10)
throw new InvalidOperationException("Not Enough info in order to calculate requested page in a timely fation, last page info is for page #" + lastPage + ", please go to a closer page");
var originalPage = pagingInfo.CurrentPage;
pagingInfo.CurrentPage = lastPage;
while (pagingInfo.CurrentPage < originalPage)
{
await SearchAsync(query, sortFields, pageSize, pagingInfo).ConfigureAwait(false);
pagingInfo.CurrentPage++;
}
indexes = pagingInfo.GetPagingInfo(pagingInfo.CurrentPage);
}
var result = new SearchResults();
var applyAsync = await Strategy.ShardAccessStrategy.ApplyAsync(
Clients.Values.ToList(), new ShardRequestData(),
(client, i) => client.SearchAsync(query, sortFields, indexes[i], pageSize))
.ConfigureAwait(false);
var originalIndexes = pagingInfo.GetPagingInfo(pagingInfo.CurrentPage);
while (result.FileCount < pageSize)
{
var item = GetSmallest(applyAsync, indexes, originalIndexes, sortFields);
if (item == null)
break;
var files = new List<FileHeader>();
if (result.Files != null)
files.AddRange(result.Files);
if (item.Files != null)
files.AddRange(item.Files);
result.FileCount++;
result.Files = files;
result.PageSize = pageSize;
result.Start = 0; //TODO: update start
}
pagingInfo.SetPagingInfo(indexes);
result.Files = result.Files.Where(info => info != null).ToList();
result.FileCount = result.Files.Count;
return result;
}
