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普通の macro でちょっとボイラープレートをなくす
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use crate::domain::repository::task::{MixInTaskRepository, TaskRepository}; | |
use crate::infra::mysql::mysqlcon::{ | |
MixInMySqlConnection, MySqlConnection, MySqlConnectionDependencies, | |
}; | |
use crate::infra::redis::pool_ctxt::{MixInRedisContext, RedisContext, RedisContextDependencies}; | |
use crate::infra::repository::task::TaskRepositoryDependencies; | |
use crate::{add_deps, add_mixin_impl}; | |
pub struct TaskBootstrap {} | |
impl TaskBootstrap { | |
pub fn call(&self) { | |
let a = self.task_repository().find_task_by_id("aaa".to_string()); | |
a; | |
} | |
} | |
add_deps!( | |
TaskBootstrap, | |
TaskRepositoryDependencies, | |
RedisContextDependencies, | |
MySqlConnectionDependencies | |
); | |
add_mixin_impl!( | |
TaskBootstrap, | |
TaskRepository, | |
MixInTaskRepository, | |
task_repository | |
); | |
add_mixin_impl!( | |
TaskBootstrap, | |
MySqlConnection, | |
MixInMySqlConnection, | |
mysql_con | |
); | |
add_mixin_impl!( | |
TaskBootstrap, | |
RedisContext, | |
MixInRedisContext, | |
redis_pool_ctxt | |
); |
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extern crate macros; | |
pub mod app; | |
pub mod domain; | |
pub mod infra; | |
/// Add XXXDependencies trait for the struct you want to inject in. | |
#[macro_export] | |
macro_rules! add_deps { | |
($struct_:ident, $($dep_trait_:ident),*) => { | |
$( | |
impl $dep_trait_ for $struct_ {} | |
)* | |
} | |
} | |
/// Add MixInXXX trait. | |
#[macro_export] | |
macro_rules! add_mixin { | |
($trait_:ident, $mixin_trait_:ident, $func_name_:tt) => { | |
pub trait $mixin_trait_ { | |
type $trait_: $trait_; | |
fn $func_name_(&self) -> &Self::$trait_; | |
} | |
}; | |
} | |
/// Add concrete implementation to MixInXXX trait. | |
#[macro_export] | |
macro_rules! add_mixin_impl { | |
($struct_:ident, $trait_:ident, $mixin_trait_: ident, $func_name_:tt) => { | |
impl $mixin_trait_ for $struct_ { | |
type $trait_ = Self; | |
fn $func_name_(&self) -> &Self::$trait_ { | |
&self | |
} | |
} | |
}; | |
} |
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/// At last, no need to use below. | |
extern crate proc_macro; | |
use crate::proc_macro::TokenStream; | |
use quote::quote; | |
#[proc_macro_derive(TaskRepository)] | |
pub fn mixin_task_repository(input: TokenStream) -> TokenStream { | |
let input = syn::parse_macro_input!(input as syn::DeriveInput); | |
let name = &input.ident; | |
let expanded = quote! { | |
impl MixInTaskRepository for #name { | |
type TaskRepository = Self; | |
fn task_repository(&self) -> &Self::TaskRepository { | |
&self | |
} | |
} | |
}; | |
TokenStream::from(expanded) | |
} | |
#[proc_macro_derive(MySqlConnection)] | |
pub fn mixin_mysql_connection(input: TokenStream) -> TokenStream { | |
let input = syn::parse_macro_input!(input as syn::DeriveInput); | |
let name = &input.ident; | |
let expanded = quote! { | |
impl MixInMySqlConnection for #name { | |
type MySqlConnection = Self; | |
fn mysql_con(&self) -> &Self::MySqlConnection { | |
&self | |
} | |
} | |
}; | |
TokenStream::from(expanded) | |
} | |
#[proc_macro_derive(RedisContext)] | |
pub fn mixin_redis_context(input: TokenStream) -> TokenStream { | |
let input = syn::parse_macro_input!(input as syn::DeriveInput); | |
let name = &input.ident; | |
let expanded = quote! { | |
impl MixInRedisContext for #name { | |
type RedisContext = Self; | |
fn redis_pool_ctxt(&self) -> &Self::RedisContext { | |
&self | |
} | |
} | |
}; | |
TokenStream::from(expanded) | |
} |
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use crate::add_mixin; | |
use crate::domain::entity::task::Task; | |
pub trait TaskRepository { | |
fn find_task_by_id(&self, id: String) -> Option<Task>; | |
} | |
add_mixin!(TaskRepository, MixInTaskRepository, task_repository); |
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