/// <inheritdoc />
public Task <HttpResponseMessage> DeleteAsync(string path, IRequestSpan parentSpan, IRequestSpan encodeSpan, CancellationToken token)
{
var requestUri = GetUri(path);
parentSpan.WithRemoteAddress(requestUri);
encodeSpan.Dispose();
using var dispatchSpan = parentSpan.DispatchSpan();
return(HttpClient.DeleteAsync(requestUri, token));
}
/// <inheritdoc />
public Task <HttpResponseMessage> PostAsync(string path, IRequestSpan parentSpan, IRequestSpan encodeSpan, CancellationToken token, EventingFunction eventingFunction = null)
{
var requestUri = GetUri(path);
parentSpan.WithRemoteAddress(requestUri);
var content = eventingFunction != null ?
new StringContent(eventingFunction.ToJson()) :
new StringContent(string.Empty);
encodeSpan.Dispose();
using var dispatchSpan = parentSpan.DispatchSpan();
return(HttpClient.PostAsync(requestUri, content, token));
}
private async Task <IQueryResult <T> > ExecuteQuery <T>(QueryOptions options, ITypeSerializer serializer, IRequestSpan span)
{
var currentContextId = options.CurrentContextId ?? DefaultClientContextId;
QueryErrorContext ErrorContextFactory(QueryResultBase <T> failedQueryResult, HttpStatusCode statusCode)
{
// We use a local function to capture context like options and currentContextId
return(new()
{
ClientContextId = options.CurrentContextId,
Parameters = options.GetAllParametersAsJson(),
Statement = options.ToString(),
Message = GetErrorMessage(failedQueryResult, currentContextId, statusCode),
Errors = failedQueryResult.Errors,
HttpStatus = statusCode,
QueryStatus = failedQueryResult.MetaData?.Status ?? QueryStatus.Fatal
});
}
// try get Query node
var queryUri = _serviceUriProvider.GetRandomQueryUri();
span.WithRemoteAddress(queryUri);
using var encodingSpan = span.EncodingSpan();
var body = options.GetFormValuesAsJson();
encodingSpan.Dispose();
_logger.LogDebug("Sending query {contextId} to node {endpoint}.", options.CurrentContextId, queryUri);
QueryResultBase <T> queryResult;
using var content = new StringContent(body, System.Text.Encoding.UTF8, MediaType.Json);
try
{
using var dispatchSpan = span.DispatchSpan(options);
var response = await HttpClient.PostAsync(queryUri, content, options.Token).ConfigureAwait(false);
dispatchSpan.Dispose();
var stream = await response.Content.ReadAsStreamAsync().ConfigureAwait(false);
if (serializer is IStreamingTypeDeserializer streamingDeserializer)
{
queryResult = new StreamingQueryResult <T>(stream, streamingDeserializer, ErrorContextFactory);
}
else
{
queryResult = new BlockQueryResult <T>(stream, serializer);
}
queryResult.HttpStatusCode = response.StatusCode;
queryResult.Success = response.StatusCode == HttpStatusCode.OK;
//read the header and stop when we reach the queried rows
await queryResult.InitializeAsync(options.Token).ConfigureAwait(false);
if (response.StatusCode != HttpStatusCode.OK || queryResult.MetaData?.Status != QueryStatus.Success)
{
_logger.LogDebug("Request {currentContextId} has failed because {status}.",
currentContextId, queryResult.MetaData?.Status);
if (queryResult.ShouldRetry(EnhancedPreparedStatementsEnabled))
{
if (queryResult.Errors.Any(x => x.Code == 4040 && EnhancedPreparedStatementsEnabled))
{
//clear the cache of stale query plan
var statement = options.StatementValue ?? string.Empty;
if (_queryCache.TryRemove(statement, out var queryPlan))
{
_logger.LogDebug("Query plan is stale for {currentContextId}. Purging plan {queryPlanName}.", currentContextId, queryPlan.Name);
}
;
}
_logger.LogDebug("Request {currentContextId} is being retried.", currentContextId);
return(queryResult);
}
var context = ErrorContextFactory(queryResult, response.StatusCode);
if (queryResult.MetaData?.Status == QueryStatus.Timeout)
{
if (options.IsReadOnly)
{
throw new AmbiguousTimeoutException
{
Context = context
};
}
throw new UnambiguousTimeoutException
{
Context = context
};
}
queryResult.ThrowExceptionOnError(context);
}
}
catch (OperationCanceledException e)
{
var context = new QueryErrorContext
{
ClientContextId = options.CurrentContextId,
Parameters = options.GetAllParametersAsJson(),
Statement = options.ToString(),
HttpStatus = HttpStatusCode.RequestTimeout,
QueryStatus = QueryStatus.Fatal
};
_logger.LogDebug(LoggingEvents.QueryEvent, e, "Request timeout.");
if (options.IsReadOnly)
{
throw new UnambiguousTimeoutException("The query was timed out via the Token.", e)
{
Context = context
};
}
throw new AmbiguousTimeoutException("The query was timed out via the Token.", e)
{
Context = context
};
}
catch (HttpRequestException e)
{
_logger.LogDebug(LoggingEvents.QueryEvent, e, "Request canceled");
var context = new QueryErrorContext
{
ClientContextId = options.CurrentContextId,
Parameters = options.GetAllParametersAsJson(),
Statement = options.ToString(),
HttpStatus = HttpStatusCode.RequestTimeout,
QueryStatus = QueryStatus.Fatal
};
throw new RequestCanceledException("The query was canceled.", e)
{
Context = context
};
}
_logger.LogDebug($"Request {options.CurrentContextId} has succeeded.");
return(queryResult);
}