public NoShardsException(string message, ElasticSearchQuery query)
: base(message)
{
if (query == null)
{
throw new ArgumentNullException("query");
}
Query = query;
}
private static string BuildRequestUri(ElasticSearchQuery query, string operationName, params GetParam[] additionalGetParams)
{
string additionalParams = "";
if (additionalGetParams.Length != 0)
{
additionalParams = "?" + String.Join("&", additionalGetParams.Select(p => String.Concat(p.Key, "=", p.Value)));
}
string concatedShardNames = String.Join(",", query.LookupIndexes);
string requestUrl = concatedShardNames + "/" + operationName + additionalParams;
return(requestUrl);
}
private string ExecuteQueryRawInner(ElasticSearchQuery query, params GetParam[] additionalGetParams)
{
if (query.LookupIndexes.Length == 0)
{
throw new NoShardsException(
"No matching indexes by provided query",
query
);
}
string requestUrl = BuildRequestUri(query, "_search", additionalGetParams);
string jsonResponse = _httpRequest.MakePostJsonRequest(requestUrl, query.QueryJson);
return(jsonResponse);
}
private ElasticSearchQuery RemoveInexistingShards(ElasticSearchQuery query)
{
string requestUrl = BuildRequestUri(query, "_aliases", new GetParam("ignore_unavailable", "true"));
string jsonResponse = _httpRequest.MakeGetRequest(requestUrl);
var parsedResponse = JsonConvert.DeserializeObject <IDictionary <string, object> >(jsonResponse);
List <string> existingShards = new List <string>(query.LookupIndexes.Length);
foreach (string shardName in parsedResponse.Keys)
{
existingShards.Add(shardName);
}
return(new ElasticSearchQuery(query.QueryJson, existingShards.ToArray()));
}
private SearchResult <TResultModel> ExecuteQueryInner <TResultModel>(ElasticSearchQuery query, params GetParam[] additionalGetParams)
{
string jsonResponse = ExecuteQueryRawInner(query, additionalGetParams);
dynamic deserializedResponse = JsonConvert.DeserializeObject(jsonResponse);
var result = new SearchResult <TResultModel>(deserializedResponse);
if (result.TimedOut)
{
throw new TimeoutException("There was a timeout while getting data from ElasticSearch");
}
if (result.Shards.Total != 0 && result.Shards.Failed == result.Shards.Total)
{
throw new Exception(string.Format("All shards returned failure [{0}]", BuildRequestUri(query, "_search", additionalGetParams)));
}
return(result);
}
public string ExecuteQueryRaw(ElasticSearchQuery query, params GetParam[] additionalGetParams)
{
// First, try to execute query by quering all shards (try to save one http request for getting shard names)
try
{
return(ExecuteQueryRawInner(query, additionalGetParams));
}
catch (Exception ex)
{
// If full request throws 404 error, then request list of existing shards
if (ex.Message.Contains("(404) Not Found"))
{
query = RemoveInexistingShards(query);
return(ExecuteQueryRawInner(query, additionalGetParams));
}
throw;
}
}