/// <summary>
/// Run a query
/// </summary>
/// <param name="parameters">The query parameters</param>
/// <returns>matching results</returns>
public CloudSearchResults ExecuteQuery(NameValueCollection parameters)
{
CloudSearchResults result = new CloudSearchResults();
try
{
AmazonCloudSearchDomainClient client = GetCloudSearchClient();
SearchRequest request = BuildSearchRequest(parameters);
SearchResponse response = client.Search(request);
result.Items = response.Hits.Hit.Select(hit => CreateSearchResult(hit)).ToList();
result.Facets = (
from f in response.Facets
select new Facet
{
Name = f.Key,
Buckets = f.Value.Buckets.Select(b => new SI4T.Query.CloudSearch.Models.Bucket(b.Value, b.Count)).ToList()
}).ToList();
result.PageSize = Convert.ToInt32(request.Size);
result.Total = Convert.ToInt32(response.Hits.Found);
result.Start = Convert.ToInt32(request.Start);
result.QueryText = request.Query;
}
catch (Exception ex)
{
result.HasError = true;
result.ErrorDetail = ex.Message + " : " + ex.StackTrace;
}
return(result);
}
public SearchResponse SearchConnectAwsCloudsearch(string querystring, string returnFields, int returnSize = 10000, GeoCoordinate originCoords = null, AwsBoundingBox boundingBox = null)
{
var cloudSearch = new AmazonCloudSearchDomainClient(AwsAccessKeyId, AwsSecretAccessKey, AmazonSearchUrl);
var searchRequest = new SearchRequest
{
Query = querystring,
QueryParser = QueryParser.Structured,
Size = returnSize,
Return = returnFields + ",_score"
};
if (boundingBox != null)
{
searchRequest.FilterQuery = $"latlong:['{boundingBox.UpperLeftCoordinates.Lat},{boundingBox.UpperLeftCoordinates.Lng}','{boundingBox.BottomRightCoordinates.Lat},{boundingBox.BottomRightCoordinates.Lng}']";
}
if (originCoords != null)
{
searchRequest.Expr = $"{{'distance':'haversin({originCoords.Latitude},{originCoords.Longitude},latlong.latitude,latlong.longitude)'}}"; // use to sort by proximity
searchRequest.Sort = "distance asc";
searchRequest.Return += ",distance";
}
var response = cloudSearch.Search(searchRequest);
return(response);
}
public SearchResponse SearchByGroupId(string groupId)
{
var cloudSearch = new AmazonCloudSearchDomainClient(AwsAccessKeyId, AwsSecretAccessKey, AmazonSearchUrl);
var searchRequest = new SearchRequest
{
Query = "groupid: " + groupId,
QueryParser = QueryParser.Structured,
QueryOptions = "{'fields': ['groupid']}",
Size = 1,
Return = "_all_fields"
};
var response = cloudSearch.Search(searchRequest);
return(response);
}
public IResultSet Search(ISearchQuery query)
{
var amazonSearchParameters = this.GetAmazonParams();
AmazonCloudSearchDomainConfig config = new AmazonCloudSearchDomainConfig();
config.ServiceURL = amazonSearchParameters[SearchEndPoint];
AmazonCloudSearchDomainClient domainClient = new AmazonCloudSearchDomainClient(amazonSearchParameters[AccessKey], amazonSearchParameters[SecretAccessKey], config);
List <string> suggestions = new List <string>();
StringBuilder highlights = new StringBuilder();
highlights.Append("{\'");
if (query == null)
{
throw new ArgumentNullException("query");
}
foreach (var field in query.HighlightedFields)
{
if (highlights.Length > 2)
{
highlights.Append(", \'");
}
highlights.Append(field.ToLowerInvariant());
highlights.Append("\':{} ");
SuggestRequest suggestRequest = new SuggestRequest();
suggestRequest.Suggester = this.GetSuggesterName(field);
suggestRequest.Size = query.Take;
suggestRequest.Query = query.Text;
SuggestResponse suggestion = domainClient.Suggest(suggestRequest);
foreach (var suggest in suggestion.Suggest.Suggestions)
{
suggestions.Add(suggest.Suggestion);
}
}
highlights.Append("}");
SearchRequest searchRequest = new SearchRequest();
if (query.Filter != null)
{
searchRequest.FilterQuery = this.BuildQueryFilter(query.Filter);
}
if (query.OrderBy != null)
{
searchRequest.Sort = string.Join(",", query.OrderBy);
}
if (query.Take > 0)
{
searchRequest.Size = query.Take;
}
if (query.Skip > 0)
{
searchRequest.Start = query.Skip;
}
searchRequest.Highlight = highlights.ToString();
searchRequest.Query = query.Text;
searchRequest.QueryParser = QueryParser.Simple;
var result = domainClient.Search(searchRequest).SearchResult;
return(new AmazonResultSet(result, suggestions));
}
/// <summary>
/// Retrieving suggestions using a custom implementation. This implementation assumes a 'literal'
/// field type to be used as source for suggestions. This field must have lowercase values.
/// Optionally an alternate display field can be provided which can be used populate the result.
/// This implementation returns similar results as the AWS CloudSearch Suggester when populate the
/// suggest field with the same value field as display field (but in lowercase).
/// </summary>
/// <param name="parameters">Suggest request parameters</param>
/// <param name="suggestFieldName">Name of the suggest field</param>
/// <param name="displayFieldName">Name of the display field</param>
/// <returns>SuggestResults</returns>
public SuggestResults RetieveFilteredSuggestions(NameValueCollection parameters, string suggestFieldName, string displayFieldName = null)
{
SuggestResults suggestResults = new SuggestResults();
try
{
AmazonCloudSearchDomainClient client = GetCloudSearchClient();
SearchRequest request = new SearchRequest();
if (parameters["q"] != null)
{
request.QueryParser = QueryParser.Structured;
request.Query = String.Format("(prefix field={0} '{1}')", suggestFieldName, parameters["q"].ToLower());
}
if (displayFieldName == null)
{
request.Facet = String.Format("{{'{0}':{{'sort':'bucket'}}}}", suggestFieldName);
request.Return = "_no_fields";
}
else
{
request.Return = displayFieldName;
request.Sort = String.Format("{0} asc", displayFieldName);
}
if (!String.IsNullOrEmpty(parameters["fq"]))
{
string filters = string.Empty;
foreach (string filterString in parameters["fq"].Split(','))
{
if (filterString.Contains(":"))
{
filters += (String.Format(" {0}:'{1}'", filterString.Split(':')[0], filterString.Split(':')[1]));
}
}
request.FilterQuery = String.Format("(and{0})", filters);
}
request.Size = parameters["size"] != null?Convert.ToInt32(parameters["size"]) : this.DefaultPageSize;
SearchResponse response = client.Search(request);
if (displayFieldName == null)
{
if (response.Facets.Count > 0)
{
suggestResults.Matches = response.Facets[suggestFieldName].Buckets.Select(b => b.Value).ToList();
}
}
else
{
if (response.Hits.Hit.Count > 0)
{
suggestResults.Matches = response.Hits.Hit.Select(h => h.Fields[displayFieldName].FirstOrDefault()).ToList();
}
}
}
catch (Exception ex)
{
suggestResults.HasError = true;
suggestResults.ErrorDetail = ex.Message + " : " + ex.StackTrace;
}
return(suggestResults);
}
