1 /* 2 * Copyright 2023 Google LLC 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef FCP_AGGREGATION_PROTOCOL_RESOURCE_RESOLVER_H_ 18 #define FCP_AGGREGATION_PROTOCOL_RESOURCE_RESOLVER_H_ 19 20 #include <memory> 21 #include <string> 22 23 #include "absl/status/statusor.h" 24 #include "absl/strings/cord.h" 25 26 namespace fcp::aggregation { 27 28 // Describes an abstract interface for resolving a resource from a given client 29 // and uri. 30 class ResourceResolver { 31 public: 32 virtual ~ResourceResolver() = default; 33 34 // Retrieves a resource for the given `client_id` and `uri` combination. 35 // The resource can be accessed exactly once and must be deleted (best-effort) 36 // after it is returned. 37 virtual absl::StatusOr<absl::Cord> RetrieveResource( 38 int64_t client_id, const std::string& uri) = 0; 39 }; 40 } // namespace fcp::aggregation 41 42 #endif // FCP_AGGREGATION_PROTOCOL_RESOURCE_RESOLVER_H_ 43