| // Licensed to the Apache Software Foundation (ASF) under one |
| // or more contributor license agreements. See the NOTICE file |
| // distributed with this work for additional information |
| // regarding copyright ownership. The ASF licenses this file |
| // to you under the Apache License, Version 2.0 (the |
| // "License"); you may not use this file except in compliance |
| // with the License. You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, |
| // software distributed under the License is distributed on an |
| // "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| // KIND, either express or implied. See the License for the |
| // specific language governing permissions and limitations |
| // under the License. |
| |
| use serde::{Deserialize, Serialize}; |
| use std::collections::HashMap; |
| use std::prelude::v1::*; |
| |
| #[derive(Debug, Serialize, Deserialize, Clone)] |
| pub struct Request<T> { |
| #[serde(skip_serializing_if = "HashMap::is_empty")] |
| #[serde(default)] |
| pub metadata: HashMap<String, String>, |
| #[serde(flatten)] |
| pub message: T, |
| } |
| |
| impl<T> Request<T> { |
| pub fn new(message: T) -> Self { |
| Request { |
| metadata: HashMap::<String, String>::default(), |
| message, |
| } |
| } |
| |
| pub fn map<F, U>(self, f: F) -> Request<U> |
| where |
| F: FnOnce(T) -> U, |
| { |
| let message = f(self.message); |
| |
| Request { |
| metadata: self.metadata, |
| message, |
| } |
| } |
| |
| pub fn metadata(&self) -> &HashMap<String, String> { |
| &self.metadata |
| } |
| |
| pub fn metadata_mut(&mut self) -> &mut HashMap<String, String> { |
| &mut self.metadata |
| } |
| } |
| |
| pub trait IntoRequest<T> { |
| fn into_request(self) -> Request<T>; |
| } |
| |
| impl<T> IntoRequest<T> for T { |
| fn into_request(self) -> Request<Self> { |
| Request::new(self) |
| } |
| } |