public async Task <FindResults <TResult> > FindAsAsync <TResult>(IRepositoryQuery query, ICommandOptions options = null) where TResult : class, new()
{
if (query == null)
{
query = new RepositoryQuery();
}
bool useSnapshotPaging = options.ShouldUseSnapshotPaging();
// don't use caching with snapshot paging.
bool allowCaching = IsCacheEnabled && useSnapshotPaging == false;
options = ConfigureOptions(options);
await OnBeforeQueryAsync(query, options, typeof(TResult)).AnyContext();
Func <FindResults <TResult>, Task <FindResults <TResult> > > getNextPageFunc = async r => {
var previousResults = r;
if (previousResults == null)
{
throw new ArgumentException(nameof(r));
}
if (!String.IsNullOrEmpty(previousResults.GetScrollId()))
{
var scrollResponse = await _client.ScrollAsync <TResult>(options.GetSnapshotLifetime(), previousResults.GetScrollId()).AnyContext();
_logger.Trace(() => scrollResponse.GetRequest());
var results = scrollResponse.ToFindResults();
results.Page = previousResults.Page + 1;
results.HasMore = scrollResponse.Hits.Count() >= options.GetLimit();
return(results);
}
if (options == null)
{
return(new FindResults <TResult>());
}
options?.PageNumber(!options.HasPageNumber() ? 2 : options.GetPage() + 1);
return(await FindAsAsync <TResult>(query, options).AnyContext());
};
string cacheSuffix = options?.HasPageLimit() == true?String.Concat(options.GetPage().ToString(), ":", options.GetLimit().ToString()) : null;
FindResults <TResult> result;
if (allowCaching)
{
result = await GetCachedQueryResultAsync <FindResults <TResult> >(options, cacheSuffix : cacheSuffix).AnyContext();
if (result != null)
{
((IGetNextPage <TResult>)result).GetNextPageFunc = async r => await getNextPageFunc(r).AnyContext();
return(result);
}
}
ISearchResponse <TResult> response = null;
if (useSnapshotPaging == false || !options.HasSnapshotScrollId())
{
var searchDescriptor = await CreateSearchDescriptorAsync(query, options).AnyContext();
if (useSnapshotPaging)
{
searchDescriptor.Scroll(options.GetSnapshotLifetime());
}
response = await _client.SearchAsync <TResult>(searchDescriptor).AnyContext();
}
else
{
response = await _client.ScrollAsync <TResult>(options.GetSnapshotLifetime(), options.GetSnapshotScrollId()).AnyContext();
}
_logger.Trace(() => response.GetRequest());
if (!response.IsValid)
{
if (response.ApiCall.HttpStatusCode.GetValueOrDefault() == 404)
{
return(new FindResults <TResult>());
}
string message = response.GetErrorMessage();
_logger.Error().Exception(response.OriginalException).Message(message).Property("request", response.GetRequest()).Write();
throw new ApplicationException(message, response.OriginalException);
}
if (useSnapshotPaging)
{
result = response.ToFindResults();
// TODO: Is there a better way to figure out if you are done scrolling?
result.HasMore = response.Hits.Count() >= options.GetLimit();
((IGetNextPage <TResult>)result).GetNextPageFunc = getNextPageFunc;
}
else if (options.HasPageLimit() == true)
{
result = response.ToFindResults(options.GetLimit());
result.HasMore = response.Hits.Count() > options.GetLimit();
((IGetNextPage <TResult>)result).GetNextPageFunc = getNextPageFunc;
}
else
{
result = response.ToFindResults();
}
result.Page = options.GetPage();
if (!allowCaching)
{
return(result);
}
var nextPageFunc = ((IGetNextPage <TResult>)result).GetNextPageFunc;
((IGetNextPage <TResult>)result).GetNextPageFunc = null;
await SetCachedQueryResultAsync(options, result, cacheSuffix : cacheSuffix).AnyContext();
((IGetNextPage <TResult>)result).GetNextPageFunc = nextPageFunc;
return(result);
}
protected async Task <FindResults <TResult> > FindAsAsync <TResult>(IRepositoryQuery query) where TResult : class, new()
{
if (query == null)
{
throw new ArgumentNullException(nameof(query));
}
var pagableQuery = query as IPagableQuery;
var pagingOptions = pagableQuery?.Options as IPagingOptions;
var elasticPagingOptions = pagableQuery?.Options as ElasticPagingOptions;
bool useSnapshotPaging = elasticPagingOptions?.UseSnapshotPaging ?? false;
// don't use caching with snapshot paging.
bool allowCaching = IsCacheEnabled && useSnapshotPaging == false;
var queryOptions = GetQueryOptions();
await OnBeforeQueryAsync(query, queryOptions, typeof(TResult)).AnyContext();
Func <FindResults <TResult>, Task <FindResults <TResult> > > getNextPageFunc = async r => {
var previousResults = r;
if (previousResults == null)
{
throw new ArgumentException(nameof(r));
}
if (!String.IsNullOrEmpty(previousResults.GetScrollId()))
{
var scrollResponse = await _client.ScrollAsync <TResult>(pagableQuery.GetLifetime(), previousResults.GetScrollId()).AnyContext();
_logger.Trace(() => scrollResponse.GetRequest());
var results = scrollResponse.ToFindResults();
results.Page = previousResults.Page + 1;
results.HasMore = scrollResponse.Hits.Count() >= pagableQuery.GetLimit();
return(results);
}
if (pagableQuery == null)
{
return(new FindResults <TResult>());
}
if (pagingOptions != null)
{
pagingOptions.Page = pagingOptions.Page == null ? 2 : pagingOptions.Page + 1;
}
return(await FindAsAsync <TResult>(query).AnyContext());
};
string cacheSuffix = pagableQuery?.ShouldUseLimit() == true?String.Concat(pagingOptions.Page?.ToString() ?? "1", ":", pagableQuery.GetLimit().ToString()) : String.Empty;
FindResults <TResult> result;
if (allowCaching)
{
result = await GetCachedQueryResultAsync <FindResults <TResult> >(query, cacheSuffix : cacheSuffix).AnyContext();
if (result != null)
{
((IGetNextPage <TResult>)result).GetNextPageFunc = async r => await getNextPageFunc(r).AnyContext();
return(result);
}
}
ISearchResponse <TResult> response = null;
if (useSnapshotPaging == false || String.IsNullOrEmpty(elasticPagingOptions?.ScrollId))
{
SearchDescriptor <T> searchDescriptor = await CreateSearchDescriptorAsync(query, queryOptions).AnyContext();
if (useSnapshotPaging)
{
searchDescriptor.SearchType(SearchType.Scan).Scroll(pagableQuery.GetLifetime());
}
response = await _client.SearchAsync <TResult>(searchDescriptor).AnyContext();
_logger.Trace(() => response.GetRequest());
if (!response.IsValid)
{
if (response.ConnectionStatus.HttpStatusCode.GetValueOrDefault() == 404)
{
return(new FindResults <TResult>());
}
string message = response.GetErrorMessage();
_logger.Error().Exception(response.ConnectionStatus.OriginalException).Message(message).Property("request", response.GetRequest()).Write();
throw new ApplicationException(message, response.ConnectionStatus.OriginalException);
}
}
if (useSnapshotPaging)
{
// The response might have returned 0 search results.
if (response?.Total == 0)
{
return(response.ToFindResults());
}
var scrollResponse = await _client.ScrollAsync <TResult>(pagableQuery.GetLifetime(), response?.ScrollId ?? elasticPagingOptions?.ScrollId).AnyContext();
_logger.Trace(() => scrollResponse.GetRequest());
if (!scrollResponse.IsValid)
{
string message = scrollResponse.GetErrorMessage();
_logger.Error().Exception(scrollResponse.ConnectionStatus.OriginalException).Message(message).Property("request", scrollResponse.GetRequest()).Write();
throw new ApplicationException(message, scrollResponse.ConnectionStatus.OriginalException);
}
result = scrollResponse.ToFindResults();
result.HasMore = scrollResponse.Hits.Count() >= pagableQuery.GetLimit();
((IGetNextPage <TResult>)result).GetNextPageFunc = getNextPageFunc;
}
else if (pagableQuery?.ShouldUseLimit() == true)
{
result = response.ToFindResults(pagableQuery.GetLimit());
result.HasMore = response.Hits.Count() > pagableQuery.GetLimit();
((IGetNextPage <TResult>)result).GetNextPageFunc = getNextPageFunc;
}
else
{
result = response.ToFindResults();
}
result.Page = pagingOptions?.Page ?? 1;
if (!allowCaching)
{
return(result);
}
var nextPageFunc = ((IGetNextPage <TResult>)result).GetNextPageFunc;
((IGetNextPage <TResult>)result).GetNextPageFunc = null;
await SetCachedQueryResultAsync(query, result, cacheSuffix : cacheSuffix).AnyContext();
((IGetNextPage <TResult>)result).GetNextPageFunc = nextPageFunc;
return(result);
}
