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ChildProcessRunner.js
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ChildProcessRunner.js
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import { resolve } from 'path'
import { node } from 'execa'
const childProcessHelperPath = resolve(__dirname, 'childProcessHelper.js')
export default class ChildProcessRunner {
#env = null
#functionKey = null
#handlerName = null
#handlerPath = null
#timeout = null
#allowCache = false
constructor(funOptions, env, allowCache) {
const { functionKey, handlerName, handlerPath, timeout } = funOptions
this.#env = env
this.#functionKey = functionKey
this.#handlerName = handlerName
this.#handlerPath = handlerPath
this.#timeout = timeout
this.#allowCache = allowCache
}
// no-op
// () => void
cleanup() {}
async run(event, context) {
const childProcess = node(
childProcessHelperPath,
[this.#functionKey, this.#handlerName, this.#handlerPath],
{
env: this.#env,
stdio: 'inherit',
},
)
childProcess.send({
context,
event,
allowCache: this.#allowCache,
timeout: this.#timeout,
})
const message = new Promise((_resolve) => {
childProcess.on('message', _resolve)
// TODO
// on error? on exit? ..
})
let result
try {
result = await message
} catch (err) {
// TODO
console.log(err)
throw err
}
return result
}
}