/// <summary>
/// Executes the <see cref="IQueryRequest"/> using HTTP POST to the Couchbase Server asynchronously.
/// </summary>
/// <typeparam name="T">The <see cref="Type"/> of each row returned by the query.</typeparam>
/// <param name="queryRequest">The query request.</param>
/// <param name="cancellationToken">Token which can cancel the query.</param>
/// <returns></returns>
/// <remarks>The format for the querying is JSON</remarks>
protected virtual async Task <IQueryResult <T> > ExecuteQueryAsync <T>(IQueryRequest queryRequest, CancellationToken cancellationToken)
{
var queryResult = new QueryResult <T>();
if (!TryGetQueryUri(out var baseUri))
{
Log.Error(ExceptionUtil.EmptyUriTryingSubmitN1qlQuery);
ProcessError(new InvalidOperationException(ExceptionUtil.EmptyUriTryingSubmitN1QlQuery), queryResult);
return(queryResult);
}
ApplyCredentials(queryRequest);
if (Log.IsDebugEnabled)
{
//need to remove the brackets or else string.format will fail in Log.Debug
var req = queryRequest.ToString();
Log.Debug(req.Replace("{", "").Replace("}", ""));
}
string body;
using (ClientConfiguration.Tracer.BuildSpan(queryRequest, CouchbaseOperationNames.RequestEncoding).Start())
{
body = queryRequest.GetFormValuesAsJson();
}
using (var content = new StringContent(body, System.Text.Encoding.UTF8, MediaType.Json))
{
try
{
using (var timer = new QueryTimer(queryRequest, new CommonLogStore(Log), ClientConfiguration.EnableQueryTiming))
{
Log.Trace("Sending query cid{0}: {1}", queryRequest.CurrentContextId, baseUri);
HttpResponseMessage response;
using (ClientConfiguration.Tracer.BuildSpan(queryRequest, CouchbaseOperationNames.DispatchToServer).Start())
{
response = await HttpClient.PostAsync(baseUri, content, cancellationToken).ContinueOnAnyContext();
}
using (var span = ClientConfiguration.Tracer.BuildSpan(queryRequest, CouchbaseOperationNames.ResponseDecoding).Start())
using (var stream = await response.Content.ReadAsStreamAsync().ContinueOnAnyContext())
{
queryResult = GetDataMapper(queryRequest).Map <QueryResultData <T> >(stream).ToQueryResult();
queryResult.Success = queryResult.Status == QueryStatus.Success;
queryResult.HttpStatusCode = response.StatusCode;
Log.Trace("Received query cid{0}: {1}", queryResult.ClientContextId, queryResult.ToString());
timer.ClusterElapsedTime = queryResult.Metrics.ElaspedTime;
span.SetPeerLatencyTag(queryResult.Metrics.ElaspedTime);
}
}
baseUri.ClearFailed();
}
catch (TaskCanceledException)
{
var operationContext = new OperationContext("n1ql", queryRequest.CurrentContextId)
{
RemoteEndpoint = baseUri.Authority
};
Log.Info(operationContext.ToString());
}
catch (HttpRequestException e)
{
Log.Info("Failed query cid{0}: {1}", queryRequest.CurrentContextId, baseUri);
baseUri.IncrementFailed();
ProcessError(e, queryResult);
Log.Error(e);
}
catch (AggregateException ae)
{
ae.Flatten().Handle(e =>
{
Log.Info("Failed query cid{0}: {1}", queryRequest.CurrentContextId, baseUri);
ProcessError(e, queryResult);
return(true);
});
}
catch (Exception e)
{
Log.Info("Failed query cid{0}: {1}", queryRequest.CurrentContextId, baseUri);
Log.Info(e);
ProcessError(e, queryResult);
}
}
UpdateLastActivity();
return(queryResult);
}
/// <summary>
/// Executes the <see cref="IQueryRequest"/> using HTTP POST to the Couchbase Server asynchronously.
/// </summary>
/// <typeparam name="T">The <see cref="Type"/> of each row returned by the query.</typeparam>
/// <param name="queryRequest">The query request.</param>
/// <param name="cancellationToken">Token which can cancel the query.</param>
/// <returns></returns>
/// <remarks>The format for the querying is JSON</remarks>
protected virtual async Task <IQueryResult <T> > ExecuteQueryAsync <T>(IQueryRequest queryRequest, CancellationToken cancellationToken)
{
var queryResult = new QueryResult <T>();
FailureCountingUri baseUri;
if (!TryGetQueryUri(out baseUri))
{
Log.Error(ExceptionUtil.EmptyUriTryingSubmitN1qlQuery);
ProcessError(new InvalidOperationException(ExceptionUtil.EmptyUriTryingSubmitN1QlQuery), queryResult);
return(queryResult);
}
ApplyCredentials(queryRequest);
if (Log.IsDebugEnabled)
{
Log.Debug(queryRequest.ToString());
}
using (var content = new StringContent(queryRequest.GetFormValuesAsJson(), System.Text.Encoding.UTF8, MediaType.Json))
{
try
{
using (var timer = new QueryTimer(queryRequest, new CommonLogStore(Log), ClientConfiguration.EnableQueryTiming))
{
Log.Trace("Sending query cid{0}: {1}", queryRequest.CurrentContextId, baseUri);
var request = await HttpClient.PostAsync(baseUri, content, cancellationToken).ContinueOnAnyContext();
using (var response = await request.Content.ReadAsStreamAsync().ContinueOnAnyContext())
{
queryResult = GetDataMapper(queryRequest).Map <QueryResultData <T> >(response).ToQueryResult();
queryResult.Success = queryResult.Status == QueryStatus.Success;
queryResult.HttpStatusCode = request.StatusCode;
Log.Trace("Received query cid{0}: {1}", queryResult.ClientContextId, queryResult.ToString());
timer.ClusterElapsedTime = queryResult.Metrics.ElaspedTime;
}
}
baseUri.ClearFailed();
}
catch (HttpRequestException e)
{
Log.Info("Failed query cid{0}: {1}", queryRequest.CurrentContextId, baseUri);
baseUri.IncrementFailed();
ProcessError(e, queryResult);
Log.Error(e);
}
catch (AggregateException ae)
{
ae.Flatten().Handle(e =>
{
Log.Info("Failed query cid{0}: {1}", queryRequest.CurrentContextId, baseUri);
ProcessError(e, queryResult);
return(true);
});
}
catch (Exception e)
{
Log.Info("Failed query cid{0}: {1}", queryRequest.CurrentContextId, baseUri);
Log.Info(e);
ProcessError(e, queryResult);
}
}
return(queryResult);
}