private async Task <IEnumerable <Message> > getCrossShard(LogChronicleFilter filter)
{
filter.CrossShard = false; //stop recursion, each shard should return just its own data
var shards = m_Server.GetEndpointsForAllShards(LogServiceAddress, nameof(ILogChronicle));
var calls = shards.Select(shard => shard.Call((http, ct) => http.Client.PostAndGetJsonMapAsync("filter", filter)));
var responses = await Task.WhenAll(calls.Select(async call => {
try
{
return(await call);
}
catch (Exception error)
{
WriteLog(MessageType.Warning, nameof(getCrossShard), "Shard fetch error: " + error.ToMessageWithType(), error);
return(null);
}
}));
var result = responses.SelectMany(response => response.UnwrapPayloadArray()
.OfType <JsonDataMap>()
.Select(imap => JsonReader.ToDoc <Message>(imap)))
.OrderBy(m => m.UTCTimeStamp)
.ToArray();
return(result);
}
private async Task <IEnumerable <Message> > getOneShard(LogChronicleFilter filter)
{
var response = await m_Server.Call(LogServiceAddress,
nameof(ILogChronicle),
0,
(http, ct) => http.Client.PostAndGetJsonMapAsync("filter", filter));
var result = response.UnwrapPayloadArray()
.OfType <JsonDataMap>()
.Select(imap => JsonReader.ToDoc <Message>(imap));
return(result);
}
public async Task <IEnumerable <Message> > GetAsync(LogChronicleFilter filter)
=> await(filter.NonNull(nameof(filter)).CrossShard ? getCrossShard(filter)
: getOneShard(filter));