| <!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="generator" content="rustdoc"><meta name="description" content="Source of the Rust file `types/src/task_state.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>task_state.rs - source</title><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceSerif4-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../FiraSans-Regular.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../FiraSans-Medium.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceCodePro-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceSerif4-Bold.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceCodePro-Semibold.ttf.woff2"><link rel="stylesheet" href="../../normalize.css"><link rel="stylesheet" href="../../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" href="../../ayu.css" disabled><link rel="stylesheet" href="../../dark.css" disabled><link rel="stylesheet" href="../../light.css" id="themeStyle"><script id="default-settings" ></script><script src="../../storage.js"></script><script defer src="../../source-script.js"></script><script defer src="../../source-files.js"></script><script defer src="../../main.js"></script><noscript><link rel="stylesheet" href="../../noscript.css"></noscript><link rel="alternate icon" type="image/png" href="../../favicon-16x16.png"><link rel="alternate icon" type="image/png" href="../../favicon-32x32.png"><link rel="icon" type="image/svg+xml" href="../../favicon.svg"></head><body class="rustdoc source"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><a class="sidebar-logo" href="../../teaclave_types/index.html"><div class="logo-container"><img class="rust-logo" src="../../rust-logo.svg" alt="logo"></div></a></nav><main><div class="width-limiter"><nav class="sub"><a class="sub-logo-container" href="../../teaclave_types/index.html"><img class="rust-logo" src="../../rust-logo.svg" alt="logo"></a><form class="search-form"><div class="search-container"><span></span><input class="search-input" name="search" autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"><div id="help-button" title="help" tabindex="-1"><a href="../../help.html">?</a></div><div id="settings-menu" tabindex="-1"><a href="../../settings.html" title="settings"><img width="22" height="22" alt="Change settings" src="../../wheel.svg"></a></div></div></form></nav><section id="main-content" class="content"><div class="example-wrap"><pre class="src-line-numbers"><span id="1">1</span> |
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| </pre><pre class="rust"><code><span class="comment">// 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. |
| |
| </span><span class="kw">use crate</span>::<span class="kw-2">*</span>; |
| <span class="kw">use </span>anyhow::{bail, ensure, Error, <span class="prelude-ty">Result</span>}; |
| <span class="kw">use </span>serde::{Deserialize, Serialize}; |
| <span class="kw">use </span>std::collections::HashSet; |
| <span class="kw">use </span>std::convert::TryInto; |
| <span class="kw">use </span>uuid::Uuid; |
| |
| <span class="kw">const </span>TASK_PREFIX: <span class="kw-2">&</span>str = <span class="string">"task"</span>; |
| |
| <span class="attribute">#[derive(Debug, Clone, Default, Deserialize, Serialize)] |
| </span><span class="kw">pub struct </span>TaskState { |
| <span class="kw">pub </span>task_id: Uuid, |
| <span class="kw">pub </span>creator: UserID, |
| <span class="kw">pub </span>function_id: ExternalID, |
| <span class="kw">pub </span>function_arguments: FunctionArguments, |
| <span class="kw">pub </span>executor: Executor, |
| <span class="kw">pub </span>inputs_ownership: TaskFileOwners, |
| <span class="kw">pub </span>outputs_ownership: TaskFileOwners, |
| <span class="kw">pub </span>function_owner: UserID, |
| <span class="kw">pub </span>participants: UserList, |
| <span class="kw">pub </span>approved_users: UserList, |
| <span class="kw">pub </span>assigned_inputs: TaskFiles<TeaclaveInputFile>, |
| <span class="kw">pub </span>assigned_outputs: TaskFiles<TeaclaveOutputFile>, |
| <span class="kw">pub </span>result: TaskResult, |
| <span class="kw">pub </span>status: TaskStatus, |
| } |
| |
| <span class="kw">impl </span>Storable <span class="kw">for </span>TaskState { |
| <span class="kw">fn </span>key_prefix() -> <span class="kw-2">&</span><span class="lifetime">'static </span>str { |
| TASK_PREFIX |
| } |
| |
| <span class="kw">fn </span>uuid(<span class="kw-2">&</span><span class="self">self</span>) -> Uuid { |
| <span class="self">self</span>.task_id |
| } |
| } |
| |
| <span class="kw">impl </span>TaskState { |
| <span class="kw">pub fn </span>everyone_approved(<span class="kw-2">&</span><span class="self">self</span>) -> bool { |
| <span class="comment">// Single user task is by default approved by the creator |
| </span>(<span class="self">self</span>.participants.len() == <span class="number">1</span>) || (<span class="self">self</span>.participants == <span class="self">self</span>.approved_users) |
| } |
| |
| <span class="kw">pub fn </span>all_data_assigned(<span class="kw-2">&</span><span class="self">self</span>) -> bool { |
| <span class="kw">let </span>input_args: HashSet<<span class="kw-2">&</span>String> = <span class="self">self</span>.inputs_ownership.keys().collect(); |
| <span class="kw">let </span>assiged_inputs: HashSet<<span class="kw-2">&</span>String> = <span class="self">self</span>.assigned_inputs.keys().collect(); |
| <span class="kw">if </span>input_args != assiged_inputs { |
| <span class="kw">return </span><span class="bool-val">false</span>; |
| } |
| |
| <span class="kw">let </span>output_args: HashSet<<span class="kw-2">&</span>String> = <span class="self">self</span>.outputs_ownership.keys().collect(); |
| <span class="kw">let </span>assiged_outputs: HashSet<<span class="kw-2">&</span>String> = <span class="self">self</span>.assigned_outputs.keys().collect(); |
| <span class="kw">if </span>output_args != assiged_outputs { |
| <span class="kw">return </span><span class="bool-val">false</span>; |
| } |
| |
| <span class="bool-val">true |
| </span>} |
| |
| <span class="kw">pub fn </span>has_participant(<span class="kw-2">&</span><span class="self">self</span>, user_id: <span class="kw-2">&</span>UserID) -> bool { |
| <span class="self">self</span>.participants.contains(user_id) |
| } |
| |
| <span class="kw">pub fn </span>has_creator(<span class="kw-2">&</span><span class="self">self</span>, user_id: <span class="kw-2">&</span>UserID) -> bool { |
| <span class="kw-2">&</span><span class="self">self</span>.creator == user_id |
| } |
| |
| <span class="kw">pub fn </span>is_ended(<span class="kw-2">&</span><span class="self">self</span>) -> bool { |
| <span class="macro">matches!</span>( |
| <span class="self">self</span>.status, |
| TaskStatus::Finished | TaskStatus::Failed | TaskStatus::Canceled |
| ) |
| } |
| } |
| |
| <span class="attribute">#[derive(Debug, Clone, Default, Deserialize, Serialize)] |
| </span><span class="kw">pub struct </span>Task<S: StateTag> { |
| state: TaskState, |
| extra: S, |
| } |
| |
| <span class="kw">pub trait </span>StateTag {} |
| <span class="kw">impl </span>StateTag <span class="kw">for </span>Create {} |
| <span class="kw">impl </span>StateTag <span class="kw">for </span>Assign {} |
| <span class="kw">impl </span>StateTag <span class="kw">for </span>Approve {} |
| <span class="kw">impl </span>StateTag <span class="kw">for </span>Stage {} |
| <span class="kw">impl </span>StateTag <span class="kw">for </span>Run {} |
| <span class="kw">impl </span>StateTag <span class="kw">for </span>Finish {} |
| <span class="kw">impl </span>StateTag <span class="kw">for </span>Done {} |
| <span class="kw">impl </span>StateTag <span class="kw">for </span>Cancel {} |
| <span class="kw">impl </span>StateTag <span class="kw">for </span>Fail {} |
| |
| <span class="kw">impl </span>Task<Create> { |
| <span class="kw">pub fn </span>new( |
| requester: UserID, |
| req_executor: Executor, |
| req_func_args: FunctionArguments, |
| req_input_owners: <span class="kw">impl </span>Into<TaskFileOwners>, |
| req_output_owners: <span class="kw">impl </span>Into<TaskFileOwners>, |
| function: Function, |
| ) -> <span class="prelude-ty">Result</span><<span class="self">Self</span>> { |
| <span class="kw">let </span>req_input_owners = req_input_owners.into(); |
| <span class="kw">let </span>req_output_owners = req_output_owners.into(); |
| |
| <span class="comment">// gather all participants |
| </span><span class="kw">let </span>input_owners = req_input_owners.all_owners(); |
| <span class="kw">let </span>output_owners = req_output_owners.all_owners(); |
| <span class="kw">let </span><span class="kw-2">mut </span>participants = UserList::unions(<span class="macro">vec!</span>[input_owners, output_owners]); |
| participants.insert(requester.clone()); |
| <span class="kw">if </span>!function.public { |
| participants.insert(function.owner.clone()); |
| } |
| |
| <span class="comment">//check function compatibility |
| </span><span class="kw">let </span>fn_args_spec: HashSet<<span class="kw-2">&</span>String> = function |
| .arguments |
| .iter() |
| .filter(|arg| arg.allow_overwrite) |
| .map(|arg| <span class="kw-2">&</span>arg.key) |
| .collect(); |
| <span class="kw">let </span>req_args: HashSet<<span class="kw-2">&</span>String> = req_func_args.inner().keys().collect(); |
| <span class="macro">ensure!</span>(fn_args_spec == req_args, <span class="string">"function_arguments mismatch"</span>); |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>func_args = req_func_args; |
| <span class="kw">for </span>arg <span class="kw">in </span><span class="kw-2">&</span>function.arguments { |
| <span class="kw">if </span>!arg.allow_overwrite || !func_args.inner().contains_key(<span class="kw-2">&</span>arg.key) { |
| func_args.insert( |
| arg.key.clone(), |
| serde_json::Value::String(arg.default_value.clone()), |
| ); |
| } |
| } |
| |
| <span class="comment">// check input fkeys |
| </span><span class="kw">let </span>inputs_spec: HashSet<<span class="kw-2">&</span>String> = function.inputs.iter().map(|f| <span class="kw-2">&</span>f.name).collect(); |
| <span class="kw">let </span><span class="kw-2">mut </span>req_input_fkeys: HashSet<<span class="kw-2">&</span>String> = req_input_owners.keys().collect(); |
| <span class="comment">// If an input/output file is marked with `optional: True`, users do not need to |
| // register the file. |
| </span><span class="kw">let </span>option_inputs_spec: HashSet<<span class="kw-2">&</span>String> = function |
| .inputs |
| .iter() |
| .filter(|f| f.optional) |
| .map(|f| <span class="kw-2">&</span>f.name) |
| .collect(); |
| req_input_fkeys.extend(<span class="kw-2">&</span>option_inputs_spec); |
| |
| <span class="macro">ensure!</span>(inputs_spec == req_input_fkeys, <span class="string">"input keys mismatch"</span>); |
| |
| <span class="comment">// check output fkeys |
| </span><span class="kw">let </span>outputs_spec: HashSet<<span class="kw-2">&</span>String> = function.outputs.iter().map(|f| <span class="kw-2">&</span>f.name).collect(); |
| <span class="kw">let </span><span class="kw-2">mut </span>req_output_fkeys: HashSet<<span class="kw-2">&</span>String> = req_output_owners.keys().collect(); |
| <span class="kw">let </span>option_outputs_spec: HashSet<<span class="kw-2">&</span>String> = function |
| .outputs |
| .iter() |
| .filter(|f| f.optional) |
| .map(|f| <span class="kw-2">&</span>f.name) |
| .collect(); |
| req_output_fkeys.extend(<span class="kw-2">&</span>option_outputs_spec); |
| <span class="macro">ensure!</span>(outputs_spec == req_output_fkeys, <span class="string">"output keys mismatch"</span>); |
| |
| <span class="kw">let </span>ts = TaskState { |
| task_id: Uuid::new_v4(), |
| creator: requester, |
| executor: req_executor, |
| function_id: function.external_id(), |
| function_owner: function.owner.clone(), |
| function_arguments: func_args, |
| inputs_ownership: req_input_owners, |
| outputs_ownership: req_output_owners, |
| participants, |
| ..Default::default() |
| }; |
| |
| <span class="prelude-val">Ok</span>(Task { |
| state: ts, |
| extra: Create, |
| }) |
| } |
| } |
| |
| <span class="kw">impl </span>Task<Assign> { |
| <span class="kw">pub fn </span>new(ts: TaskState) -> <span class="prelude-ty">Result</span><<span class="self">Self</span>> { |
| <span class="kw">let </span>task = Task::<Assign> { |
| state: ts, |
| extra: Assign, |
| }; |
| <span class="prelude-val">Ok</span>(task) |
| } |
| |
| <span class="kw">pub fn </span>assign_input( |
| <span class="kw-2">&mut </span><span class="self">self</span>, |
| requester: <span class="kw-2">&</span>UserID, |
| fname: <span class="kw-2">&</span>str, |
| file: TeaclaveInputFile, |
| ) -> <span class="prelude-ty">Result</span><()> { |
| <span class="macro">ensure!</span>( |
| file.owner.contains(requester), |
| <span class="string">"Assign: requester is not in the owner list. {:?}."</span>, |
| file.external_id() |
| ); |
| |
| <span class="self">self</span>.state.inputs_ownership.check(fname, <span class="kw-2">&</span>file.owner)<span class="question-mark">?</span>; |
| <span class="self">self</span>.state.assigned_inputs.assign(fname, file)<span class="question-mark">?</span>; |
| <span class="prelude-val">Ok</span>(()) |
| } |
| |
| <span class="kw">pub fn </span>assign_output( |
| <span class="kw-2">&mut </span><span class="self">self</span>, |
| requester: <span class="kw-2">&</span>UserID, |
| fname: <span class="kw-2">&</span>str, |
| file: TeaclaveOutputFile, |
| ) -> <span class="prelude-ty">Result</span><()> { |
| <span class="macro">ensure!</span>( |
| file.owner.contains(requester), |
| <span class="string">"Assign: requester is not in the owner list. {:?}."</span>, |
| file.external_id() |
| ); |
| |
| <span class="self">self</span>.state.outputs_ownership.check(fname, <span class="kw-2">&</span>file.owner)<span class="question-mark">?</span>; |
| <span class="self">self</span>.state.assigned_outputs.assign(fname, file)<span class="question-mark">?</span>; |
| <span class="prelude-val">Ok</span>(()) |
| } |
| } |
| |
| <span class="kw">impl </span>Task<Approve> { |
| <span class="kw">pub fn </span>new(ts: TaskState) -> <span class="prelude-ty">Result</span><<span class="self">Self</span>> { |
| <span class="kw">let </span>task = Task::<Approve> { |
| state: ts, |
| extra: Approve, |
| }; |
| <span class="prelude-val">Ok</span>(task) |
| } |
| |
| <span class="kw">pub fn </span>approve(<span class="kw-2">&mut </span><span class="self">self</span>, requester: <span class="kw-2">&</span>UserID) -> <span class="prelude-ty">Result</span><()> { |
| <span class="macro">ensure!</span>( |
| <span class="self">self</span>.state.participants.contains(requester), |
| <span class="string">"Unexpected user trying to approve a task: {:?}"</span>, |
| requester |
| ); |
| |
| <span class="self">self</span>.state.approved_users.insert(requester.clone()); |
| <span class="prelude-val">Ok</span>(()) |
| } |
| } |
| |
| <span class="kw">impl </span>Task<Stage> { |
| <span class="kw">pub fn </span>new(ts: TaskState) -> <span class="prelude-ty">Result</span><<span class="self">Self</span>> { |
| <span class="kw">let </span>task = Task::<Stage> { |
| state: ts, |
| extra: Stage, |
| }; |
| <span class="prelude-val">Ok</span>(task) |
| } |
| |
| <span class="kw">pub fn </span>stage_for_running( |
| <span class="kw-2">&mut </span><span class="self">self</span>, |
| requester: <span class="kw-2">&</span>UserID, |
| function: Function, |
| ) -> <span class="prelude-ty">Result</span><StagedTask> { |
| <span class="macro">ensure!</span>( |
| <span class="self">self</span>.state.has_creator(requester), |
| <span class="string">"Requestor is not the task creater" |
| </span>); |
| |
| <span class="kw">let </span>function_arguments = <span class="self">self</span>.state.function_arguments.clone(); |
| <span class="kw">let </span>staged_task = StagedTask { |
| task_id: <span class="self">self</span>.state.task_id, |
| user_id: requester.into(), |
| executor: <span class="self">self</span>.state.executor, |
| executor_type: function.executor_type, |
| function_id: function.id, |
| function_name: function.name, |
| function_payload: function.payload, |
| function_arguments, |
| input_data: <span class="self">self</span>.state.assigned_inputs.clone().into(), |
| output_data: <span class="self">self</span>.state.assigned_outputs.clone().into(), |
| }; |
| <span class="prelude-val">Ok</span>(staged_task) |
| } |
| } |
| |
| <span class="kw">impl </span>Task<Run> { |
| <span class="kw">pub fn </span>new(ts: TaskState) -> <span class="prelude-ty">Result</span><<span class="self">Self</span>> { |
| <span class="kw">let </span>task = Task::<Run> { |
| state: ts, |
| extra: Run, |
| }; |
| <span class="prelude-val">Ok</span>(task) |
| } |
| } |
| |
| <span class="kw">impl </span>Task<Finish> { |
| <span class="kw">pub fn </span>new(ts: TaskState) -> <span class="prelude-ty">Result</span><<span class="self">Self</span>> { |
| <span class="kw">let </span>task = Task::<Finish> { |
| state: ts, |
| extra: Finish, |
| }; |
| <span class="prelude-val">Ok</span>(task) |
| } |
| |
| <span class="kw">pub fn </span>update_output_cmac( |
| <span class="kw-2">&mut </span><span class="self">self</span>, |
| fname: <span class="kw-2">&</span>str, |
| auth_tag: <span class="kw-2">&</span>FileAuthTag, |
| ) -> <span class="prelude-ty">Result</span><<span class="kw-2">&</span>TeaclaveOutputFile> { |
| <span class="self">self</span>.state.assigned_outputs.update_cmac(fname, auth_tag) |
| } |
| |
| <span class="kw">pub fn </span>update_result(<span class="kw-2">&mut </span><span class="self">self</span>, result: TaskResult) -> <span class="prelude-ty">Result</span><()> { |
| <span class="self">self</span>.state.result = result; |
| <span class="prelude-val">Ok</span>(()) |
| } |
| } |
| |
| <span class="kw">impl </span>Task<Done> { |
| <span class="kw">pub fn </span>new(ts: TaskState) -> <span class="prelude-ty">Result</span><<span class="self">Self</span>> { |
| <span class="kw">let </span>task = Task::<Done> { |
| state: ts, |
| extra: Done, |
| }; |
| <span class="prelude-val">Ok</span>(task) |
| } |
| } |
| |
| <span class="kw">impl </span>Task<Fail> { |
| <span class="kw">pub fn </span>new(ts: TaskState) -> <span class="prelude-ty">Result</span><<span class="self">Self</span>> { |
| <span class="kw">let </span>task = Task::<Fail> { |
| state: ts, |
| extra: Fail, |
| }; |
| <span class="prelude-val">Ok</span>(task) |
| } |
| |
| <span class="kw">pub fn </span>update_result(<span class="kw-2">&mut </span><span class="self">self</span>, result: TaskResult) -> <span class="prelude-ty">Result</span><()> { |
| <span class="kw">match </span><span class="kw-2">&</span>result { |
| TaskResult::Err(<span class="kw">_</span>) => { |
| <span class="self">self</span>.state.result = result; |
| <span class="prelude-val">Ok</span>(()) |
| } |
| <span class="kw">_ </span>=> <span class="prelude-val">Err</span>(Error::msg( |
| <span class="string">"TaskResult::Err(TaskFailure) is expected for failed task"</span>, |
| )), |
| } |
| } |
| } |
| |
| <span class="kw">impl </span>Task<Cancel> { |
| <span class="kw">pub fn </span>new(ts: TaskState) -> <span class="prelude-ty">Result</span><<span class="self">Self</span>> { |
| <span class="kw">let </span>task = Task::<Cancel> { |
| state: ts, |
| extra: Cancel, |
| }; |
| <span class="prelude-val">Ok</span>(task) |
| } |
| |
| <span class="kw">pub fn </span>update_result(<span class="kw-2">&mut </span><span class="self">self</span>, result: TaskResult) -> <span class="prelude-ty">Result</span><()> { |
| <span class="kw">match </span><span class="kw-2">&</span>result { |
| TaskResult::Err(<span class="kw">_</span>) => { |
| <span class="self">self</span>.state.result = result; |
| <span class="prelude-val">Ok</span>(()) |
| } |
| <span class="kw">_ </span>=> <span class="prelude-val">Err</span>(Error::msg( |
| <span class="string">"TaskResult::Err(TaskFailure) is expected for canceled task"</span>, |
| )), |
| } |
| } |
| } |
| |
| <span class="kw">trait </span>TryTransitionTo<T>: Sized { |
| <span class="kw">type </span>Error; |
| <span class="kw">fn </span>try_transition_to(<span class="self">self</span>) -> std::result::Result<T, Error>; |
| <span class="kw">fn </span>ready_for_transition(<span class="kw-2">&</span><span class="self">self</span>) -> bool { |
| <span class="bool-val">true |
| </span>} |
| } |
| |
| <span class="kw">impl </span>TryTransitionTo<Task<Approve>> <span class="kw">for </span>Task<Assign> { |
| <span class="kw">type </span>Error = Error; |
| <span class="kw">fn </span>try_transition_to(<span class="self">self</span>) -> <span class="prelude-ty">Result</span><Task<Approve>> { |
| <span class="macro">ensure!</span>(<span class="self">self</span>.ready_for_transition(), <span class="string">"Not ready: Assign -> Approve"</span>); |
| Task::<Approve>::new(<span class="self">self</span>.state) |
| } |
| |
| <span class="kw">fn </span>ready_for_transition(<span class="kw-2">&</span><span class="self">self</span>) -> bool { |
| <span class="self">self</span>.state.all_data_assigned() |
| } |
| } |
| |
| <span class="kw">impl </span>TryTransitionTo<Task<Stage>> <span class="kw">for </span>Task<Approve> { |
| <span class="kw">type </span>Error = Error; |
| <span class="kw">fn </span>try_transition_to(<span class="self">self</span>) -> <span class="prelude-ty">Result</span><Task<Stage>> { |
| <span class="macro">ensure!</span>(<span class="self">self</span>.ready_for_transition(), <span class="string">"Not ready: Apporve -> Stage"</span>); |
| Task::<Stage>::new(<span class="self">self</span>.state) |
| } |
| <span class="kw">fn </span>ready_for_transition(<span class="kw-2">&</span><span class="self">self</span>) -> bool { |
| <span class="self">self</span>.state.everyone_approved() |
| } |
| } |
| |
| <span class="kw">impl </span>TryTransitionTo<Task<Run>> <span class="kw">for </span>Task<Stage> { |
| <span class="kw">type </span>Error = Error; |
| <span class="kw">fn </span>try_transition_to(<span class="self">self</span>) -> <span class="prelude-ty">Result</span><Task<Run>> { |
| Task::<Run>::new(<span class="self">self</span>.state) |
| } |
| } |
| |
| <span class="kw">impl </span>TryTransitionTo<Task<Finish>> <span class="kw">for </span>Task<Run> { |
| <span class="kw">type </span>Error = Error; |
| <span class="kw">fn </span>try_transition_to(<span class="self">self</span>) -> <span class="prelude-ty">Result</span><Task<Finish>> { |
| Task::<Finish>::new(<span class="self">self</span>.state) |
| } |
| } |
| |
| <span class="kw">impl </span>TryTransitionTo<Task<Done>> <span class="kw">for </span>Task<Finish> { |
| <span class="kw">type </span>Error = Error; |
| <span class="kw">fn </span>try_transition_to(<span class="self">self</span>) -> <span class="prelude-ty">Result</span><Task<Done>> { |
| Task::<Done>::new(<span class="self">self</span>.state) |
| } |
| } |
| |
| <span class="kw">impl </span>std::convert::TryFrom<TaskState> <span class="kw">for </span>Task<Assign> { |
| <span class="kw">type </span>Error = Error; |
| |
| <span class="kw">fn </span>try_from(ts: TaskState) -> <span class="prelude-ty">Result</span><<span class="self">Self</span>> { |
| <span class="kw">let </span>task = <span class="kw">match </span>ts.status { |
| TaskStatus::Created => Task::<Assign>::new(ts)<span class="question-mark">?</span>, |
| <span class="kw">_ </span>=> <span class="macro">bail!</span>(<span class="string">"Cannot restore to Assign from saved state "</span>), |
| }; |
| <span class="prelude-val">Ok</span>(task) |
| } |
| } |
| |
| <span class="kw">impl </span>std::convert::TryFrom<TaskState> <span class="kw">for </span>Task<Approve> { |
| <span class="kw">type </span>Error = Error; |
| |
| <span class="kw">fn </span>try_from(ts: TaskState) -> <span class="prelude-ty">Result</span><<span class="self">Self</span>> { |
| <span class="kw">let </span>task = <span class="kw">match </span>ts.status { |
| TaskStatus::Created => { |
| <span class="kw">let </span>task: Task<Assign> = ts.try_into()<span class="question-mark">?</span>; |
| task.try_transition_to()<span class="question-mark">? |
| </span>} |
| TaskStatus::DataAssigned => Task::<Approve>::new(ts)<span class="question-mark">?</span>, |
| <span class="kw">_ </span>=> <span class="macro">bail!</span>(<span class="string">"Cannot restore to Approve from saved state"</span>), |
| }; |
| <span class="prelude-val">Ok</span>(task) |
| } |
| } |
| |
| <span class="kw">impl </span>std::convert::TryFrom<TaskState> <span class="kw">for </span>Task<Stage> { |
| <span class="kw">type </span>Error = Error; |
| |
| <span class="kw">fn </span>try_from(ts: TaskState) -> <span class="prelude-ty">Result</span><<span class="self">Self</span>> { |
| <span class="kw">let </span>task = <span class="kw">match </span>ts.status { |
| TaskStatus::Created | TaskStatus::DataAssigned => { |
| <span class="kw">let </span>task: Task<Approve> = ts.try_into()<span class="question-mark">?</span>; |
| task.try_transition_to()<span class="question-mark">? |
| </span>} |
| TaskStatus::Approved => Task::<Stage>::new(ts)<span class="question-mark">?</span>, |
| <span class="kw">_ </span>=> <span class="macro">bail!</span>(<span class="string">"Cannot restore to Stage from saved state"</span>), |
| }; |
| <span class="prelude-val">Ok</span>(task) |
| } |
| } |
| |
| <span class="kw">impl </span>std::convert::TryFrom<TaskState> <span class="kw">for </span>Task<Run> { |
| <span class="kw">type </span>Error = Error; |
| |
| <span class="kw">fn </span>try_from(ts: TaskState) -> <span class="prelude-ty">Result</span><<span class="self">Self</span>> { |
| <span class="kw">let </span>task = <span class="kw">match </span>ts.status { |
| TaskStatus::Staged => Task::<Run>::new(ts)<span class="question-mark">?</span>, |
| <span class="kw">_ </span>=> <span class="macro">bail!</span>(<span class="string">"Cannot restore to Run from saved state"</span>), |
| }; |
| <span class="prelude-val">Ok</span>(task) |
| } |
| } |
| |
| <span class="kw">impl </span>std::convert::TryFrom<TaskState> <span class="kw">for </span>Task<Finish> { |
| <span class="kw">type </span>Error = Error; |
| |
| <span class="kw">fn </span>try_from(ts: TaskState) -> <span class="prelude-ty">Result</span><<span class="self">Self</span>> { |
| <span class="kw">let </span>task = <span class="kw">match </span>ts.status { |
| TaskStatus::Running => Task::<Finish>::new(ts)<span class="question-mark">?</span>, |
| <span class="kw">_ </span>=> <span class="macro">bail!</span>(<span class="string">"Cannot restore to Finish from saved state"</span>), |
| }; |
| <span class="prelude-val">Ok</span>(task) |
| } |
| } |
| |
| <span class="kw">impl </span>std::convert::TryFrom<TaskState> <span class="kw">for </span>Task<Fail> { |
| <span class="kw">type </span>Error = Error; |
| |
| <span class="kw">fn </span>try_from(ts: TaskState) -> <span class="prelude-ty">Result</span><<span class="self">Self</span>> { |
| <span class="kw">let </span>task = <span class="kw">match </span>ts.status { |
| TaskStatus::Running | TaskStatus::Staged => Task::<Fail>::new(ts)<span class="question-mark">?</span>, |
| <span class="kw">_ </span>=> <span class="macro">bail!</span>(<span class="string">"Cannot restore to Fail from saved state"</span>), |
| }; |
| <span class="prelude-val">Ok</span>(task) |
| } |
| } |
| |
| <span class="kw">impl </span>std::convert::TryFrom<TaskState> <span class="kw">for </span>Task<Cancel> { |
| <span class="kw">type </span>Error = Error; |
| |
| <span class="kw">fn </span>try_from(ts: TaskState) -> <span class="prelude-ty">Result</span><<span class="self">Self</span>> { |
| <span class="kw">let </span>task = <span class="kw">match </span>ts.status { |
| TaskStatus::Running |
| | TaskStatus::Staged |
| | TaskStatus::Approved |
| | TaskStatus::Created |
| | TaskStatus::DataAssigned => Task::<Cancel>::new(ts)<span class="question-mark">?</span>, |
| <span class="kw">_ </span>=> <span class="macro">bail!</span>(<span class="string">"Cannot restore to Cancel from saved state"</span>), |
| }; |
| <span class="prelude-val">Ok</span>(task) |
| } |
| } |
| |
| <span class="kw">impl </span>std::convert::From<Task<Create>> <span class="kw">for </span>TaskState { |
| <span class="kw">fn </span>from(<span class="kw-2">mut </span>task: Task<Create>) -> TaskState { |
| task.state.status = TaskStatus::Created; |
| task.state |
| } |
| } |
| |
| <span class="kw">impl </span>std::convert::From<Task<Fail>> <span class="kw">for </span>TaskState { |
| <span class="kw">fn </span>from(<span class="kw-2">mut </span>task: Task<Fail>) -> TaskState { |
| task.state.status = TaskStatus::Failed; |
| task.state |
| } |
| } |
| |
| <span class="kw">impl </span>std::convert::From<Task<Cancel>> <span class="kw">for </span>TaskState { |
| <span class="kw">fn </span>from(<span class="kw-2">mut </span>task: Task<Cancel>) -> TaskState { |
| task.state.status = TaskStatus::Canceled; |
| task.state |
| } |
| } |
| |
| <span class="macro">impl_transit_and_into_task_state!</span>(Assign => Approve); |
| <span class="macro">impl_transit_and_into_task_state!</span>(Approve => Stage); |
| <span class="macro">impl_transit_and_into_task_state!</span>(Stage => Run); |
| <span class="macro">impl_transit_and_into_task_state!</span>(Run => Finish); |
| <span class="macro">impl_transit_and_into_task_state!</span>(Finish => Done); |
| |
| <span class="attribute">#[macro_export] |
| </span><span class="macro">macro_rules! </span>impl_transit_and_into_task_state { |
| ( <span class="macro-nonterminal">$cur</span>:ty => <span class="macro-nonterminal">$next</span>:ty ) => { |
| <span class="kw">impl </span>std::convert::From<Task<<span class="macro-nonterminal">$cur</span>>> <span class="kw">for </span>TaskState { |
| <span class="kw">fn </span>from(<span class="kw-2">mut </span>task: Task<<span class="macro-nonterminal">$cur</span>>) -> TaskState { |
| <span class="kw">if </span><Task<<span class="macro-nonterminal">$cur</span>> <span class="kw">as </span>TryTransitionTo<Task<<span class="macro-nonterminal">$next</span>>>>::ready_for_transition(<span class="kw-2">&</span>task) { |
| <span class="comment">// We assume that if it's ready for transistion, the result is always Ok. |
| </span><span class="kw">let </span><span class="kw-2">mut </span>nt: Task<<span class="macro-nonterminal">$next</span>> = task.try_transition_to().unwrap(); |
| nt.state.status = nt.extra.into(); |
| <span class="kw">return </span>nt.state; |
| } |
| task.state.status = task.extra.into(); |
| task.state |
| } |
| } |
| }; |
| } |
| |
| <span class="attribute">#[derive(Debug, Default, Clone, Deserialize, Serialize)] |
| </span><span class="kw">pub struct </span>Create; |
| <span class="attribute">#[derive(Debug, Default, Clone, Deserialize, Serialize)] |
| </span><span class="kw">pub struct </span>Assign; |
| <span class="attribute">#[derive(Debug, Default, Clone, Deserialize, Serialize)] |
| </span><span class="kw">pub struct </span>Approve; |
| <span class="attribute">#[derive(Debug, Default, Clone, Deserialize, Serialize)] |
| </span><span class="kw">pub struct </span>Stage; |
| <span class="attribute">#[derive(Debug, Default, Clone, Deserialize, Serialize)] |
| </span><span class="kw">pub struct </span>Run; |
| <span class="attribute">#[derive(Debug, Default, Clone, Deserialize, Serialize)] |
| </span><span class="kw">pub struct </span>Finish; |
| <span class="attribute">#[derive(Debug, Default, Clone, Deserialize, Serialize)] |
| </span><span class="kw">pub struct </span>Done; |
| <span class="attribute">#[derive(Debug, Default, Clone, Deserialize, Serialize)] |
| </span><span class="kw">pub struct </span>Cancel; |
| <span class="attribute">#[derive(Debug, Default, Clone, Deserialize, Serialize)] |
| </span><span class="kw">pub struct </span>Fail; |
| |
| <span class="kw">impl </span>std::convert::From<Create> <span class="kw">for </span>TaskStatus { |
| <span class="kw">fn </span>from(_tag: Create) -> TaskStatus { |
| TaskStatus::Created |
| } |
| } |
| |
| <span class="kw">impl </span>std::convert::From<Assign> <span class="kw">for </span>TaskStatus { |
| <span class="kw">fn </span>from(_tag: Assign) -> TaskStatus { |
| TaskStatus::Created |
| } |
| } |
| |
| <span class="kw">impl </span>std::convert::From<Approve> <span class="kw">for </span>TaskStatus { |
| <span class="kw">fn </span>from(_tag: Approve) -> TaskStatus { |
| TaskStatus::DataAssigned |
| } |
| } |
| |
| <span class="kw">impl </span>std::convert::From<Stage> <span class="kw">for </span>TaskStatus { |
| <span class="kw">fn </span>from(_tag: Stage) -> TaskStatus { |
| TaskStatus::Approved |
| } |
| } |
| |
| <span class="kw">impl </span>std::convert::From<Run> <span class="kw">for </span>TaskStatus { |
| <span class="kw">fn </span>from(_tag: Run) -> TaskStatus { |
| TaskStatus::Staged |
| } |
| } |
| |
| <span class="kw">impl </span>std::convert::From<Finish> <span class="kw">for </span>TaskStatus { |
| <span class="kw">fn </span>from(_tag: Finish) -> TaskStatus { |
| TaskStatus::Running |
| } |
| } |
| |
| <span class="kw">impl </span>std::convert::From<Done> <span class="kw">for </span>TaskStatus { |
| <span class="kw">fn </span>from(_tag: Done) -> TaskStatus { |
| TaskStatus::Finished |
| } |
| } |
| </code></pre></div> |
| </section></div></main><div id="rustdoc-vars" data-root-path="../../" data-current-crate="teaclave_types" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.66.0-nightly (5c8bff74b 2022-10-21)" ></div></body></html> |
