public async Task <ElasticSearchResponse <TEntity> > SearchAsync <TEntity>(ElasticSearchRequest <TEntity> elasticSearchRequest)
where TEntity : class
{
var result = new ElasticSearchResponse <TEntity>();
var indexName = ElasticSearchExtensions.GetIndexNameFrom <TEntity>();
var searchResponse = await _elasticClient.SearchAsync <TEntity>(s => CreateSearchDescriptor(elasticSearchRequest, s, indexName))
.ConfigureAwait(false);
if (!searchResponse.IsValid)
{
result.IsOk = false;
result.ErrorMessage = searchResponse.OriginalException?.Message;
result.Exception = searchResponse.OriginalException;
return(result);
}
result.SearchResults = searchResponse;
return(result);
}
public AnswerCollection Answer(Question question)
{
string queryString = $"source={this.envInfo.SearchSource}&locale={question.Locale}&query={HttpUtility.UrlEncode(question.QuestionText)}&count={question.ResultCount}";
HttpWebRequest request = (HttpWebRequest)WebRequest.Create($"{this.envInfo.SearchUrl}?{queryString}");
request.Method = "GET";
ElasticSearchResponse response = null;
try
{
using (HttpWebResponse webResponse = request.GetResponse() as HttpWebResponse)
{
using (StreamReader reader = new StreamReader(webResponse.GetResponseStream()))
{
string responseString = reader.ReadToEnd();
response = JsonConvert.DeserializeObject <ElasticSearchResponse>(responseString);
}
}
}
catch (Exception ex)
{
throw new ElasticSearchException(
this.envInfo.SearchUrl,
this.envInfo.SearchSource,
question.QuestionText,
question.ResultCount,
question.Locale,
"Failed to get answers from Elastic Search.",
ex);
}
if (response == null)
{
throw new ElasticSearchException(
this.envInfo.SearchUrl,
this.envInfo.SearchSource,
question.QuestionText,
question.ResultCount,
question.Locale,
"Elastic Search returns null.",
null);
}
if (response.Error != null)
{
StringBuilder message = new StringBuilder();
message.AppendLine("Elastic Search returns error.");
message.AppendLine($" Error code: {response.Error.Code}");
message.AppendLine($" Error message: {response.Error.Message}");
throw new ElasticSearchException(
this.envInfo.SearchUrl,
this.envInfo.SearchSource,
question.QuestionText,
question.ResultCount,
question.Locale,
message.ToString(),
null);
}
List <Answer> answers = new List <Core.DomainModels.Answer>();
foreach (ElasticSearchResult result in response.Results)
{
answers.Add(new Answer()
{
Question = result.Question,
AnswerText = result.Answer,
Type = result.Type,
Url = result.Url
});
}
return(new AnswerCollection()
{
TotalCount = response.TotalCount,
ResultCount = response.ResultCount,
Answers = answers
});
}