mirror of
https://github.com/LiteyukiStudio/LiteyukiBot.git
synced 2024-11-15 01:34:38 +08:00
100 lines
3.6 KiB
Markdown
100 lines
3.6 KiB
Markdown
|
---
|
|||
|
|
title: 进程通信
|
|||
|
|
icon: exchange-alt
|
|||
|
|
order: 4
|
|||
|
|
category: 开发
|
|||
|
|
---
|
|||
|
|
|
|||
|
|
## **通道通信**
|
|||
|
|
|
|||
|
|
### 简介
|
|||
|
|
|
|||
|
|
轻雪运行在主进程 MainProcess 里，其他插件框架进程是伴随的子进程，因此无法通过内存共享和直接对象传递的方式进行通信，轻雪提供了一个通道`Channel`用于跨进程通信，你可以通过`Channel`发送消息给其他进程，也可以监听其他进程的消息。
|
|||
|
|
|
|||
|
|
例如子进程接收到用户信息需要重启机器人，这时可以通过通道对主进程发送消息，主进程接收到消息后重启对应子进程。
|
|||
|
|
|
|||
|
|
### 示例
|
|||
|
|
|
|||
|
|
通道是全双工的，有两种接收模式，但一个通道只能使用一种，即被动模式和主动模式，被动模式由`chan.on_receive()`装饰回调函数实现，主动模式需调用`chan.receive()`实现
|
|||
|
|
|
|||
|
|
- 创建子进程的同时会初始化一个被动通道和一个主动通道，且通道标识为`{process_name}-active`和`{process_name}-passive`，
|
|||
|
|
- 主进程中通过`get_channel`函数获取通道对象
|
|||
|
|
- 子进程中导入单例`active_channel`及`passive_channel`即可
|
|||
|
|
|
|||
|
|
> 在轻雪插件中(主进程中)
|
|||
|
|
|
|||
|
|
```python
|
|||
|
|
import asyncio
|
|||
|
|
|
|||
|
|
from liteyuki.comm import get_channel, Channel
|
|||
|
|
from liteyuki import get_bot
|
|||
|
|
|
|||
|
|
# get_channel函数获取通道对象，参数为调用set_channel时的通道标识
|
|||
|
|
channel_passive = get_channel("nonebot-passive") # 获取被动通道
|
|||
|
|
channel_active = get_channel("nonebot-active") # 获取主动通道
|
|||
|
|
liteyuki_bot = get_bot()
|
|||
|
|
|
|||
|
|
|
|||
|
|
# 注册一个函数在轻雪启动后运行
|
|||
|
|
@liteyuki_bot.on_after_start
|
|||
|
|
async def send_data():
|
|||
|
|
while True:
|
|||
|
|
channel_passive.send("I am liteyuki main process passive")
|
|||
|
|
channel_active.send("I am liteyuki main process active")
|
|||
|
|
await asyncio.sleep(3) # 每3秒发送一次消息
|
|||
|
|
```
|
|||
|
|
|
|||
|
|
> 在子进程中（例如NoneBot插件中）
|
|||
|
|
|
|||
|
|
```python
|
|||
|
|
from nonebot import get_driver
|
|||
|
|
from liteyuki.comm import active_channel, passive_channel # 子进程中获取通道直接导入进程全局单例即可
|
|||
|
|
from liteyuki.log import logger
|
|||
|
|
|
|||
|
|
driver = get_driver()
|
|||
|
|
|
|||
|
|
|
|||
|
|
# 被动模式，通过装饰器注册一个函数在接收到消息时运行，每次接收到字符串数据时都会运行
|
|||
|
|
@passive_channel.on_receive(filter_func=lambda data: isinstance(data, str))
|
|||
|
|
async def on_passive_receive(data):
|
|||
|
|
logger.info(f"Passive receive: {data}")
|
|||
|
|
|
|||
|
|
|
|||
|
|
# 注册一个函数在NoneBot启动后运行
|
|||
|
|
@driver.on_startup
|
|||
|
|
def on_startup():
|
|||
|
|
while True:
|
|||
|
|
data = active_channel.receive()
|
|||
|
|
logger.info(f"Active receive: {data}")
|
|||
|
|
```
|
|||
|
|
|
|||
|
|
> 启动后控制台输出
|
|||
|
|
|
|||
|
|
```log
|
|||
|
|
0000-00-00 00:00:00 [ℹ️信息] Passive receive: I am liteyuki main process passive
|
|||
|
|
0000-00-00 00:00:00 [ℹ️信息] Active receive: I am liteyuki main process active
|
|||
|
|
0000-00-00 00:00:03 [ℹ️信息] Passive receive: I am liteyuki main process passive
|
|||
|
|
0000-00-00 00:00:03 [ℹ️信息] Active receive: I am liteyuki main process active
|
|||
|
|
...
|
|||
|
|
```
|
|||
|
|
|
|||
|
|
## **共享内存通信**
|
|||
|
|
|
|||
|
|
### 简介
|
|||
|
|
|
|||
|
|
- 相比于普通进程通信，内存共享使得代码编写更加简洁，轻雪框架提供了一个内存共享通信的接口，你可以通过`storage`模块实现内存共享通信，该模块封装通道实现
|
|||
|
|
- 内存共享是线程安全的，你可以在多个线程中读写共享内存，线程锁会自动保护共享内存的读写操作
|
|||
|
|
|
|||
|
|
### 示例
|
|||
|
|
|
|||
|
|
> 在任意进程中均可使用
|
|||
|
|
|
|||
|
|
```python
|
|||
|
|
from liteyuki.comm.storage import shared_memory
|
|||
|
|
|
|||
|
|
shared_memory.set("key", "value") # 设置共享内存
|
|||
|
|
value = shared_memory.get("key") # 获取共享内存
|
|||
|
|
```
|
|||
|
|
|
|||
|
|
源代码：[liteyuki/comm/storage.py](https://github.com/LiteyukiStudio/LiteyukiBot/blob/main/liteyuki/comm/storage.py)
|