[英]Apply a throttled middleware in redux
I am creating a small middleware for redux. 我正在为redux创建一个小型中间件。 Since my electron application connects to another database and updates it's state (so that I may see the state of this application on my main application).
由于我的电子应用程序连接到另一个数据库并更新了它的状态(因此我可以在主应用程序上看到该应用程序的状态)。 Here is my basic code:
这是我的基本代码:
const BLACKLIST = ['redux-form/FOCUS ', 'redux-form/BLUR'];
export remoteMiddleware => store => next => action => {
const db = MongoClient.connect(process.env.MONGO_URL);
try {
if (!BLACKLIST.includes(action.type)) {
const state = store.getState();
db.collection('state').update(
{ _id: process.env.APP_ID },
{ $set: { state } }
)
}
} finally {
db.close();
}
}
However, I am having a bit of a problem where this is firing TOO often, when it doesn't always need to fire immediately. 但是,我有一个问题,那就是它经常触发TOO,而不必总是立即触发。 I would prefer if it fired every n iterations, or perhaps no more than x ms.
我希望它每n次迭代触发一次,或者不超过x ms。
Is there a way to throttle a redux middleware so that it will only fire every n times, or such that it will only run every x number of ms? 有没有一种方法可以限制redux中间件,使其仅每n次触发一次,或仅每x毫秒运行一次?
How about simply 怎么样
const BLACKLIST = ['redux-form/FOCUS ', 'redux-form/BLUR'];
var lastActionTime = 0;
export remoteMiddleware => store => next => action => {
let now = Date.now();
try {
if (!BLACKLIST.includes(action.type) && now - lastActionTime > 100)
...
} finally() {
lastActionTime = now;
db.close();
}
}
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