我正在尝试在 async.parallel 中执行 async/await,但无法调用回调。但是,如果我删除 async/await,则可以调用回调。下面是代码
let parallelFunc = listCamId.map(camId => {
return async function (callback) {
let insertRuleTransParam = {
rule_id: ruleId,
camera_id: camId,
vas_id: vasId,
additional_parameter: additionalParameter
}
let configParamCamera = { where: { id: camId } };
let configParamRule = { where: { id: ruleId } };
try {
let ruleTrans = await createRuleTransaction(insertRuleTransParam);
let rule = await ruleService.find(configParamRule, "one");
let cam = await cameraService.find(configParamCamera, "one");
let uri = await constructCamUri(cam.protocol, cam.user_access, cam.password, cam.ip_address, cam.port, cam.path);
let visionParam = await startVasRule(vasId, ruleTrans.id, camId, rule.rule_path, rule.rule_exec, uri);
let updateRuleParam = {
port_stream: visionParam.port,
url_stream: visionParam.url,
mmap_in: visionParam.mmap_in,
mmap_out: visionParam.mmap_out
}
await updateRuleTransaction(updateRuleParam);
callback(null);
} catch (e) {
callback(e);
}
}
})
return new Promise((resolve, reject) => {
async.parallel(parallelFunc, function (err, results) {
if (err) {
reject(err);
} else {
resolve('success');
}
})
});
有人可以指出代码有什么问题吗?
不要将async.js
库用于 Promise 代码,也不要使用回调参数。只是Promise.all
用来等待多个事情:
let promises = listCamId.map(async function(camId) {
let insertRuleTransParam = {
rule_id: ruleId,
camera_id: camId,
vas_id: vasId,
additional_parameter: additionalParameter
}
let configParamCamera = { where: { id: camId } };
let configParamRule = { where: { id: ruleId } };
let ruleTrans = await createRuleTransaction(insertRuleTransParam);
let rule = await ruleService.find(configParamRule, "one");
let cam = await cameraService.find(configParamCamera, "one");
let uri = await constructCamUri(cam.protocol, cam.user_access, cam.password, cam.ip_address, cam.port, cam.path);
let visionParam = await startVasRule(vasId, ruleTrans.id, camId, rule.rule_path, rule.rule_exec, uri);
let updateRuleParam = {
port_stream: visionParam.port,
url_stream: visionParam.url,
mmap_in: visionParam.mmap_in,
mmap_out: visionParam.mmap_out
}
await updateRuleTransaction(updateRuleParam);
return null;
});
return Promise.all(promises);
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