public async Task <IReadOnlyCollection <Nerd> > GetSearchResultsAsync(string query)
{
//Try to get data in following order, should do asynchornous where
// 1st return wins
// 1: cache
// 2: Elastic Search
// 3: MongoDB
var results = new List <Task <IReadOnlyCollection <Nerd> > >();
IReadOnlyCollection <Nerd> res = new List <Nerd>();
string serializedResults;
//Let's cancel remaining tasks after we have one complete with results
//CancellationTokenSource cts = new CancellationTokenSource();
RedisSearchService redisSearch = new RedisSearchService();
results.Add(redisSearch.GetSearchResultsAsync(query));
ElasticSearchService elasticSearch = new ElasticSearchService();
results.Add(elasticSearch.GetSearchResultsAsync(query));
MongoDBSearchService mongoSearch = new MongoDBSearchService();
results.Add(mongoSearch.GetSearchResultsAsync(query));
while (results.Count > 0)
{
var result = await Task.WhenAny(results);
results.Remove(result);
res = await result;
if (res.Count > 0)
{
serializedResults = JsonConvert.SerializeObject(res);
redisSearch.CacheResultsAsync(query, serializedResults);
return(res);
}
}
return(res);
//return await Task.WhenAny(results).Results;
}
public IReadOnlyCollection <Nerd> GetSearchResults(string query)
{
//Try to get data in following order, should do asynchornous where
// 1st return wins
// 1: cache
// 2: Elastic Search
// 3: MongoDB
IReadOnlyCollection <Nerd> results = new List <Nerd>();
string serializedResults;
RedisSearchService redisSearch = new RedisSearchService();
results = redisSearch.GetSearchResults(query);
if (results.Count > 0)
{
return(results);
}
ElasticSearchService elasticSearch = new ElasticSearchService();
results = elasticSearch.GetSearchResults(query);
if (results.Count > 0)
{
serializedResults = JsonConvert.SerializeObject(results);
redisSearch.CacheResults(query, serializedResults);
return(results);
}
MongoDBSearchService mongoSearch = new MongoDBSearchService();
results = mongoSearch.GetSearchResults(query);
if (results.Count > 0)
{
serializedResults = JsonConvert.SerializeObject(results);
redisSearch.CacheResults(query, serializedResults);
return(results);
}
return(results);
}