fbthrift_git/
exceptions.rs

1/*
2 * Copyright (c) Meta Platforms, Inc. and affiliates.
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//! Helpers for generated code using exceptions
18
19use crate::thrift_protocol::MessageType;
20
21/// This trait should be implemented for each individual exception type. It will typically be generated.
22pub trait ExceptionInfo {
23    /// Exception name
24    fn exn_name(&self) -> &'static str {
25        std::any::type_name::<Self>()
26    }
27
28    // Exception value
29    fn exn_value(&self) -> String;
30
31    /// Is a declared exception
32    fn exn_is_declared(&self) -> bool;
33}
34
35/// An extension of ExceptionInfo that also includes successful results.
36/// This is implemented on generated *Exn types.
37pub trait ResultInfo: ExceptionInfo {
38    fn result_type(&self) -> ResultType;
39}
40
41/// Classify a result from a specific method call.
42#[derive(Debug, Clone, Copy, Eq, PartialEq)]
43pub enum ResultType {
44    /// A successful return
45    Return,
46    /// A declared exception
47    Error,
48    /// Some other exception (eg ApplicationException)
49    Exception,
50}
51
52impl ResultType {
53    pub fn message_type(&self) -> MessageType {
54        match self {
55            ResultType::Return | ResultType::Error => MessageType::Reply,
56            ResultType::Exception => MessageType::Exception,
57        }
58    }
59}
fbthrift_git/exceptions.rs

fbthrift_git/
exceptions.rs
