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// Copyright 2016 MaidSafe.net limited. // // This SAFE Network Software is licensed to you under (1) the MaidSafe.net Commercial License, // version 1.0 or later, or (2) The General Public License (GPL), version 3, depending on which // licence you accepted on initial access to the Software (the "Licences"). // // By contributing code to the SAFE Network Software, or to this project generally, you agree to be // bound by the terms of the MaidSafe Contributor Agreement. This, along with the Licenses can be // found in the root directory of this project at LICENSE, COPYING and CONTRIBUTOR. // // Unless required by applicable law or agreed to in writing, the SAFE Network Software distributed // under the GPL Licence is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY // KIND, either express or implied. // // Please review the Licences for the specific language governing permissions and limitations // relating to use of the SAFE Network Software. use messages::{Request, Response}; /// A cache that stores `Response`s keyed by `Requests`. Should be implemented /// by layers above routing. pub trait Cache: Send { /// Retrieve cached response for the given request. fn get(&self, request: &Request) -> Option<Response>; /// Cache the given response. fn put(&self, response: Response); } /// A no-op implementation of the `Cache` trait. Throws everything away on put /// and always returns `None` on get. pub struct NullCache; impl Cache for NullCache { fn get(&self, _: &Request) -> Option<Response> { None } fn put(&self, _: Response) {} }