javascript - 如何使用 pubsub 模拟器在本地调用 firebase Schedule 函数

Question

我正在研究云功能，尤其是日程安排功能。我需要每 5 分钟定期触发一个功能，但仅在测试步骤中。我需要在 pubsub 模拟器上运行它而不部署它。
怎么做？
我尝试使用firebase shell，但它只触发了一次

 exports.scheduledFunctionPlainEnglish =functions.pubsub.schedule('every 2 minutes')
 .onRun((context) => {
    functions.logger.log("this runs every 2 minutes")
    return null;
}) 

Answer 1

计划函数加载到 Cloud Functions 模拟器运行时并绑定(bind)到 PubSub 模拟器主题。
但正如@samstern 所说( https://github.com/firebase/firebase-tools/issues/2034 ):

you'd have to manually trigger them using a Pub/Sub message.

你可以这样做:

import * as functions from 'firebase-functions';
import * as admin from 'firebase-admin';
import { PubSub } from '@google-cloud/pubsub';

if (!admin.apps.length) {
  admin.initializeApp();
}

const pubsub = new PubSub({
  apiEndpoint: 'localhost:8085' // Change it to your PubSub emulator address and port
});

setInterval(() => {
  const SCHEDULED_FUNCTION_TOPIC = 'firebase-schedule-yourFunctionName';
  console.log(`Trigger sheduled function via PubSub topic: ${SCHEDULED_FUNCTION_TOPIC}`);
  const msg = await pubsub.topic(SCHEDULED_FUNCTION_TOPIC).publishJSON({
    foo: 'bar',
  }, { attr1: 'value1' });
}, 5 * 60 * 1000); // every 5 minutes

关于这个概念的附加信息(感谢@kthaas):

https://github.com/firebase/firebase-tools/pull/2011/files#diff-6b2a373d8dc24c4074ee623d433662831cadc7c178373fb957c06bc12c44ba7b

https://github.com/firebase/firebase-tools/pull/2011/files#diff-73f0f0ab73ffbf988f109e0a4c8b3b8a793f30ef33929928a892d605f0f0cc1f