Add SQL performance option

src/Microsoft.Health.Fhir.Api/Features/ActionResults/ResourceActionResult.cs

@@ -65,7 +65,7 @@ public override async Task ExecuteResultAsync(ActionContext context)
             }
             catch (ObjectDisposedException ode)
             {
-                throw new ServiceUnavailableException(Resources.NotAbleToCreateTheFinalResultsOfAnOperation, ode);
+                throw new ServiceUnavailableException(Api.Resources.NotAbleToCreateTheFinalResultsOfAnOperation, ode);
             }
 
             HttpResponse response = context.HttpContext.Response;

src/Microsoft.Health.Fhir.Api/Features/ActionResults/TooManyRequestsActionResult.cs

@@ -17,7 +17,7 @@ public TooManyRequestsActionResult()
                   new OperationOutcomeIssue(
                         OperationOutcomeConstants.IssueSeverity.Error,
                         OperationOutcomeConstants.IssueType.Throttled,
-                        Resources.TooManyConcurrentRequests),
+                        Api.Resources.TooManyConcurrentRequests),
                   HttpStatusCode.TooManyRequests)
         {
         }

src/Microsoft.Health.Fhir.Api/Features/Filters/QueryCacheFilterAttribute.cs

@@ -0,0 +1,61 @@
+// -------------------------------------------------------------------------------------------------
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT License (MIT). See LICENSE in the repo root for license information.
+// -------------------------------------------------------------------------------------------------
+
+using System;
+using EnsureThat;
+using Microsoft.AspNetCore.Http;
+using Microsoft.AspNetCore.Mvc.Filters;
+using Microsoft.Health.Core.Features.Context;
+using Microsoft.Health.Fhir.Api.Features.Headers;
+using Microsoft.Health.Fhir.Core.Features.Context;
+using Microsoft.Health.Fhir.Core.Registration;
+
+namespace Microsoft.Health.Fhir.Api.Features.Filters
+{
+    /// <summary>
+    /// Latency over efficiency filter.
+    /// Adds to FHIR Request Context a flag to optimize query latency over efficiency.
+    /// </summary>
+    [AttributeUsage(AttributeTargets.Class)]
+    public sealed class QueryCacheFilterAttribute : ActionFilterAttribute
+    {
+        private readonly RequestContextAccessor<IFhirRequestContext> _fhirRequestContextAccessor;
+        private readonly IFhirRuntimeConfiguration _runtimeConfiguration;
+
+        public QueryCacheFilterAttribute(RequestContextAccessor<IFhirRequestContext> fhirRequestContextAccessor, IFhirRuntimeConfiguration runtimeConfiguration)
+        {
+            EnsureArg.IsNotNull(fhirRequestContextAccessor, nameof(fhirRequestContextAccessor));
+            EnsureArg.IsNotNull(runtimeConfiguration, nameof(runtimeConfiguration));
+
+            _fhirRequestContextAccessor = fhirRequestContextAccessor;
+            _runtimeConfiguration = runtimeConfiguration;
+        }
+
+        public override void OnActionExecuting(ActionExecutingContext context)
+        {
+            EnsureArg.IsNotNull(context, nameof(context));
+
+            if (_runtimeConfiguration.IsQueryCacheSupported)
+            {
+                SetupConditionalRequestWithQueryCache(context.HttpContext, _fhirRequestContextAccessor.RequestContext);
+            }
+
+            base.OnActionExecuting(context);
+        }
+
+        private static void SetupConditionalRequestWithQueryCache(HttpContext context, IFhirRequestContext fhirRequestContext)
+        {
+            if (context?.Request?.Headers != null && fhirRequestContext != null)
+            {
+                string useQueryCache = context.GetQueryCache();
+
+                if (!string.IsNullOrEmpty(useQueryCache))
+                {
+                    fhirRequestContext.DecorateRequestContextWithQueryCache(useQueryCache);
+                }
+            }
+        }
+    }
+}

src/Microsoft.Health.Fhir.Api/Features/Filters/ValidateAsyncRequestFilterAttribute.cs

@@ -28,7 +28,7 @@ public override void OnActionExecuting(ActionExecutingContext context)
             if (!context.HttpContext.Request.Headers.TryGetValue(KnownHeaders.Prefer, out var preferHeaderValue) ||
                 !string.Equals(preferHeaderValue[0], PreferHeaderExpectedValue, StringComparison.OrdinalIgnoreCase))
             {
-                throw new RequestNotValidException(string.Format(Resources.UnsupportedHeaderValue, preferHeaderValue.FirstOrDefault(), KnownHeaders.Prefer));
+                throw new RequestNotValidException(string.Format(Api.Resources.UnsupportedHeaderValue, preferHeaderValue.FirstOrDefault(), KnownHeaders.Prefer));
             }
         }
     }

src/Microsoft.Health.Fhir.Api/Features/Filters/ValidateExportRequestFilterAttribute.cs

@@ -65,7 +65,7 @@ public override void OnActionExecuting(ActionExecutingContext context)
                 acceptHeaderValue.Count != 1 ||
                 !string.Equals(acceptHeaderValue[0], KnownContentTypes.JsonContentType, StringComparison.OrdinalIgnoreCase))
             {
-                throw new RequestNotValidException(string.Format(Resources.UnsupportedHeaderValue, acceptHeaderValue.FirstOrDefault(), HeaderNames.Accept));
+                throw new RequestNotValidException(string.Format(Api.Resources.UnsupportedHeaderValue, acceptHeaderValue.FirstOrDefault(), HeaderNames.Accept));
             }
 
             if (context.HttpContext.Request.Headers.TryGetValue(PreferHeaderName, out var preferHeaderValues))
@@ -79,7 +79,7 @@ public override void OnActionExecuting(ActionExecutingContext context)
                         || (v.Length == 1 && !(requiredHeaderValueFound = string.Equals(v[0], PreferHeaderValueRequired, StringComparison.OrdinalIgnoreCase)))
                         || (v.Length == 2 && (!string.Equals(v[0], PreferHeaderValueOptional, StringComparison.OrdinalIgnoreCase) || !Enum.TryParse<SearchParameterHandling>(v[1], true, out _))))
                     {
-                        throw new RequestNotValidException(string.Format(Resources.UnsupportedHeaderValue, value, PreferHeaderName));
+                        throw new RequestNotValidException(string.Format(Api.Resources.UnsupportedHeaderValue, value, PreferHeaderName));
                     }
                 }
 
@@ -102,14 +102,14 @@ public override void OnActionExecuting(ActionExecutingContext context)
                     continue;
                 }
 
-                throw new RequestNotValidException(string.Format(Resources.UnsupportedParameter, paramName));
+                throw new RequestNotValidException(string.Format(Api.Resources.UnsupportedParameter, paramName));
             }
 
             if (queryCollection?.Keys != null &&
                 queryCollection.Keys.Contains(KnownQueryParameterNames.TypeFilter) &&
                 !queryCollection.Keys.Contains(KnownQueryParameterNames.Type))
             {
-                throw new RequestNotValidException(Resources.TypeFilterWithoutTypeIsUnsupported);
+                throw new RequestNotValidException(Api.Resources.TypeFilterWithoutTypeIsUnsupported);
             }
 
             if (queryCollection.TryGetValue(KnownQueryParameterNames.OutputFormat, out var outputFormats))
@@ -118,7 +118,7 @@ public override void OnActionExecuting(ActionExecutingContext context)
                 {
                     if (!(outputFormat == null || SupportedOutputFormats.Contains(outputFormat)))
                     {
-                        throw new RequestNotValidException(string.Format(Resources.InvalidOutputFormat, outputFormat));
+                        throw new RequestNotValidException(string.Format(Api.Resources.InvalidOutputFormat, outputFormat));
                     }
                 }
             }

src/Microsoft.Health.Fhir.Api/Features/Filters/ValidateFormatParametersAttribute.cs

@@ -51,13 +51,13 @@ public override async Task OnActionExecutionAsync(ActionExecutingContext context
                 {
                     if (!await _parametersValidator.IsFormatSupportedAsync(headerValue[0]))
                     {
-                        throw new UnsupportedMediaTypeException(string.Format(Resources.UnsupportedHeaderValue, headerValue.FirstOrDefault(), HeaderNames.ContentType));
+                        throw new UnsupportedMediaTypeException(string.Format(Api.Resources.UnsupportedHeaderValue, headerValue.FirstOrDefault(), HeaderNames.ContentType));
                     }
                 }
                 else
                 {
                     // If no content type is supplied, then the server should respond with an unsupported media type exception.
-                    throw new UnsupportedMediaTypeException(Resources.ContentTypeHeaderRequired);
+                    throw new UnsupportedMediaTypeException(Api.Resources.ContentTypeHeaderRequired);
                 }
             }
             else if (httpContext.Request.Method.Equals(HttpMethod.Patch.Method, StringComparison.OrdinalIgnoreCase))
@@ -66,7 +66,7 @@ public override async Task OnActionExecutionAsync(ActionExecutingContext context
                 {
                     if (!await _parametersValidator.IsPatchFormatSupportedAsync(headerValue[0]))
                     {
-                        throw new UnsupportedMediaTypeException(string.Format(Resources.UnsupportedHeaderValue, headerValue.FirstOrDefault(), HeaderNames.ContentType));
+                        throw new UnsupportedMediaTypeException(string.Format(Api.Resources.UnsupportedHeaderValue, headerValue.FirstOrDefault(), HeaderNames.ContentType));
                     }
                 }
             }

src/Microsoft.Health.Fhir.Api/Features/Filters/ValidateImportRequestFilterAttribute.cs

@@ -35,7 +35,7 @@ public override void OnActionExecuting(ActionExecutingContext context)
                 preferHeaderValue.Count != 1 ||
                 !string.Equals(preferHeaderValue[0], PreferHeaderExpectedValue, StringComparison.OrdinalIgnoreCase))
             {
-                throw new RequestNotValidException(string.Format(Resources.UnsupportedHeaderValue, preferHeaderValue.FirstOrDefault(), PreferHeaderName));
+                throw new RequestNotValidException(string.Format(Api.Resources.UnsupportedHeaderValue, preferHeaderValue.FirstOrDefault(), PreferHeaderName));
             }
 
             if (string.Equals(context.HttpContext.Request.Method, "POST", StringComparison.OrdinalIgnoreCase))
@@ -44,7 +44,7 @@ public override void OnActionExecuting(ActionExecutingContext context)
                     contentTypeHeaderValue.Count != 1 ||
                     !contentTypeHeaderValue[0].Contains(ContentTypeHeaderExpectedValue, StringComparison.OrdinalIgnoreCase))
                 {
-                    throw new RequestNotValidException(string.Format(Resources.UnsupportedHeaderValue, contentTypeHeaderValue.FirstOrDefault(), HeaderNames.ContentType));
+                    throw new RequestNotValidException(string.Format(Api.Resources.UnsupportedHeaderValue, contentTypeHeaderValue.FirstOrDefault(), HeaderNames.ContentType));
                 }
             }
         }

src/Microsoft.Health.Fhir.Api/Features/Filters/ValidateParametersResourceAttribute.cs

@@ -25,12 +25,12 @@
             context.ActionArguments?.TryGetValue("inputParams", out inputResource);
             if (inputResource == null)
             {
-                throw new RequestNotValidException(Resources.MissingInputParams);
+                throw new RequestNotValidException(Api.Resources.MissingInputParams);
             }
 
             if (inputResource is not Parameters)
             {
-                throw new RequestNotValidException(string.Format(Resources.UnsupportedResourceType, inputResource.GetType().ToString()));
+                throw new RequestNotValidException(string.Format(Api.Resources.UnsupportedResourceType, inputResource.GetType().ToString()));
             }
         }
     }

src/Microsoft.Health.Fhir.Api/Features/Filters/ValidateReindexRequestFilterAttribute.cs

@@ -28,7 +28,7 @@ public override void OnActionExecuting(ActionExecutingContext context)
             if (context.HttpContext.Request.Headers.TryGetValue(PreferHeaderName, out var preferHeaderValue) &&
                 !string.Equals(preferHeaderValue[0], PreferHeaderExpectedValue, StringComparison.OrdinalIgnoreCase))
             {
-                throw new RequestNotValidException(string.Format(Resources.UnsupportedHeaderValue, preferHeaderValue.FirstOrDefault(), PreferHeaderName));
+                throw new RequestNotValidException(string.Format(Api.Resources.UnsupportedHeaderValue, preferHeaderValue.FirstOrDefault(), PreferHeaderName));
             }
         }
     }

src/Microsoft.Health.Fhir.Shared.Api/Features/Headers/HttpContextExtensions.cs → src/Microsoft.Health.Fhir.Api/Features/Headers/HttpContextExtensions.cs

@@ -48,6 +48,21 @@ public static bool IsLatencyOverEfficiencyEnabled(this HttpContext outerHttpCont
             return defaultValue;
         }
 
+        /// <summary>
+        /// Retrieves from the HTTP header information on using query caching.
+        /// </summary>
+        /// <param name="outerHttpContext">HTTP context</param>
+        /// <returns>Query cache header value</returns>
+        public static string GetQueryCache(this HttpContext outerHttpContext)
+        {
+            if (outerHttpContext != null && outerHttpContext.Request.Headers.TryGetValue(KnownHeaders.QueryCacheEnabled, out StringValues headerValues))
+            {
+                return headerValues.FirstOrDefault();
+            }
+
+            return null;
+        }
+
         /// <summary>
         /// Retrieves from the HTTP header information about the conditional-query processing logic to be adopted.
         /// </summary>
@@ -110,5 +125,15 @@ public static bool DecorateRequestContextWithOptimizedConcurrency(this IFhirRequ
 
             return requestContext.Properties.TryAdd(KnownQueryParameterNames.OptimizeConcurrency, true);
         }
+
+        public static bool DecorateRequestContextWithQueryCache(this IFhirRequestContext requestContext, string value)
+        {
+            if (requestContext == null)
+            {
+                return false;
+            }
+
+            return requestContext.Properties.TryAdd(KnownQueryParameterNames.QueryCaching, value);
+        }
     }
 }

src/Microsoft.Health.Fhir.Api/Features/Operations/Import/InitialImportLockMiddleware.cs

@@ -26,7 +26,7 @@ public sealed class InitialImportLockMiddleware
 
         // hard-coding these to minimize resource consumption for locked message
         private const string LockedContentType = "application/json; charset=utf-8";
-        private static readonly ReadOnlyMemory<byte> _lockedBody = CreateLockedBody(Resources.LockedForInitialImportMode);
+        private static readonly ReadOnlyMemory<byte> _lockedBody = CreateLockedBody(Api.Resources.LockedForInitialImportMode);
 
         public InitialImportLockMiddleware(
             RequestDelegate next,

src/Microsoft.Health.Fhir.Api/Features/Routing/SearchPostReroutingMiddleware.cs

@@ -50,7 +50,7 @@ public async Task Invoke(HttpContext context)
                 {
                     context.Response.Clear();
                     context.Response.StatusCode = (int)HttpStatusCode.BadRequest;
-                    await context.Response.WriteAsync(Resources.ContentTypeFormUrlEncodedExpected);
+                    await context.Response.WriteAsync(Api.Resources.ContentTypeFormUrlEncodedExpected);
                     return;
                 }
             }

src/Microsoft.Health.Fhir.Api/Features/Routing/UrlResolver.cs

@@ -260,7 +260,7 @@ public Uri ResolveOperationResultUrl(string operationName, string id)
                     routeName = RouteNames.GetBulkDeleteStatusById;
                     break;
                 default:
-                    throw new OperationNotImplementedException(string.Format(Resources.OperationNotImplemented, operationName));
+                    throw new OperationNotImplementedException(string.Format(Api.Resources.OperationNotImplemented, operationName));
             }
 
             var routeValues = new RouteValueDictionary()
@@ -317,7 +317,7 @@ public Uri ResolveOperationDefinitionUrl(string operationName)
                     routeName = RouteNames.SearchParameterStatusOperationDefinition;
                     break;
                 default:
-                    throw new OperationNotImplementedException(string.Format(Resources.OperationNotImplemented, operationName));
+                    throw new OperationNotImplementedException(string.Format(Api.Resources.OperationNotImplemented, operationName));
             }
 
             return GetRouteUri(

src/Microsoft.Health.Fhir.Api/Features/SMART/SmartClinicalScopesMiddleware.cs

@@ -152,14 +152,14 @@ public async Task Invoke(
                         {
                             if (authorizationConfiguration.ErrorOnMissingFhirUserClaim)
                             {
-                                throw new BadHttpRequestException(string.Format(Resources.FhirUserClaimMustBeURL, fhirUser));
+                                throw new BadHttpRequestException(string.Format(Api.Resources.FhirUserClaimMustBeURL, fhirUser));
                             }
                         }
                         catch (ArgumentNullException)
                         {
                             if (authorizationConfiguration.ErrorOnMissingFhirUserClaim)
                             {
-                                throw new BadHttpRequestException(Resources.FhirUserClaimCannotBeNull);
+                                throw new BadHttpRequestException(Api.Resources.FhirUserClaimCannotBeNull);
                             }
                         }
                     }

src/Microsoft.Health.Fhir.Api/Features/Throttling/ThrottlingMiddleware.cs

@@ -40,7 +40,7 @@ public sealed class ThrottlingMiddleware : IAsyncDisposable, IDisposable
 
         // hard-coding these to minimize resource consumption when throttling
         private const string ThrottledContentType = "application/json; charset=utf-8";
-        private static readonly ReadOnlyMemory<byte> _throttledBody = CreateThrottledBody(Resources.TooManyConcurrentRequests);
+        private static readonly ReadOnlyMemory<byte> _throttledBody = CreateThrottledBody(Api.Resources.TooManyConcurrentRequests);
 
         private readonly RequestDelegate _next;
         private readonly ILogger<ThrottlingMiddleware> _logger;
@@ -284,7 +284,7 @@ private async Task Return429(HttpContext context)
         {
             Interlocked.Increment(ref _currentPeriodRejectedCount);
 
-            _logger.LogWarning(Resources.TooManyConcurrentRequests + " Limit is {Limit}. Requests in flight {Requests}", _concurrentRequestLimit, _requestsInFlight);
+            _logger.LogWarning(Api.Resources.TooManyConcurrentRequests + " Limit is {Limit}. Requests in flight {Requests}", _concurrentRequestLimit, _requestsInFlight);
 
             context.Response.StatusCode = StatusCodes.Status429TooManyRequests;
 

src/Microsoft.Health.Fhir.Core/Features/KnownHeaders.cs

@@ -34,5 +34,7 @@ public static class KnownHeaders
 
         // #conditionalQueryParallelism - Header used to activate parallel conditional-query processing.
         public const string ConditionalQueryProcessingLogic = "x-conditionalquery-processing-logic";
+
+        public const string QueryCacheEnabled = "x-ms-query-cache-enabled";
     }
 }

src/Microsoft.Health.Fhir.Core/Features/KnownQueryParameterNames.cs

@@ -61,10 +61,18 @@ public static class KnownQueryParameterNames
         public const string Container = "_container";
 
         /// <summary>
-        /// Originally for CosmosDB workloads to hint that this request should run with a max parallel setting.
+        /// This setting is currently set by:
+        ///     x-ms-query-latency-over-efficiency
+        ///     x-conditionalquery-processing-logic
+        /// It is used to hint that the request should run with a max parallel setting.
         /// </summary>
         public const string OptimizeConcurrency = "_optimizeConcurrency";
 
+        /// <summary>
+        /// This setting is controlled by the x-ms-query-cache-enabled header. It controls whether to use the query cache or not.
+        /// </summary>
+        public const string QueryCaching = "_queryCaching";
+
         /// <summary>
         /// The anonymization configuration
         /// </summary>

src/Microsoft.Health.Fhir.Core/Registration/AzureApiForFhirRuntimeConfiguration.cs

@@ -20,5 +20,7 @@ public class AzureApiForFhirRuntimeConfiguration : IFhirRuntimeConfiguration
         public bool IsTransactionSupported => false;
 
         public bool IsLatencyOverEfficiencySupported => true;
+
+        public bool IsQueryCacheSupported => false;
     }
 }

src/Microsoft.Health.Fhir.Core/Registration/AzureHealthDataServicesRuntimeConfiguration.cs

@@ -20,5 +20,7 @@ public class AzureHealthDataServicesRuntimeConfiguration : IFhirRuntimeConfigura
         public bool IsTransactionSupported => true;
 
         public bool IsLatencyOverEfficiencySupported => false;
+
+        public bool IsQueryCacheSupported => true;
     }
 }

src/Microsoft.Health.Fhir.Core/Registration/IFhirRuntimeConfiguration.cs

@@ -33,5 +33,10 @@ public interface IFhirRuntimeConfiguration
         /// Supports the 'latency-over-efficiency' HTTP header.
         /// </summary>
         bool IsLatencyOverEfficiencySupported { get; }
+
+        /// <summary>
+        /// Supports the query cache HTTP header.
+        /// </summary>
+        bool IsQueryCacheSupported { get; }
     }
 }