Skip to main content

pub/sub trigger by Cloud Scheduler - cloud function - firebase emulator for pub/sub

The problem:

sending notifications to the owner of the expired listing

The solution:

  • target pub/sub - publish messages with Cloud scheduler on 11 pm daily
  • create topic/subscription - "cron-topic" / "sub_push_cron"
    delivery type: push (pull )
    setup endpoint on backend NodeJS use NGROK to make the local NODE server available for Google Pub/Sub
    https://3274d032fcc7.ngrok.io/copper?token=YOUR_TOKEN_00hfMQOXpD
  • axios Graphql API: processExpiredListins (getExpiredListins => owners => sendNotificaton)

The Benefit:

  1. why no cloud function needed? 
    https://cloud.google.com/scheduler/docs/tut-pub-sub


Firebase Emulator

firebase emulators:start

need start emulator in order to make NGROK works for local server, also need create topic/subscription in local

mutation {
createPubSubTopic(topicName: "copper")

}

mutation {
createPubSubPushSubscription(topicName: "copper", subscriptionName: "sub_push_copper")

}

scheduled

 https://firebase.google.com/docs/functions/schedule-functions


cloud Firestore trigger

https://firebase.google.com/docs/functions/firestore-events


to install pubsub emulator:

https://cloud.google.com/pubsub/docs/emulator

1. install google cloud sdk
https://cloud.google.com/sdk/docs/quickstart

2. gcloud components install pubsub-emulator

/Users/junwang/Downloads/google-cloud-sdk/bin/gcloud components install pubsub-emulator

3.  start emlator
/Users/junwang/Downloads/google-cloud-sdk/bin/gcloud beta emulators pubsub start

firebase emulators:start 

https://itnext.io/firebase-emulator-suite-6b51446ca2e7

firebase int
firebase emulator:start

schedule google cloud function:
https://cloud.google.com/scheduler/docs/tut-pub-sub




Labels:

Comments

Post a Comment

Popular posts from this blog

for loop in javascript - promise - .eslintrc for "for of"

the vast majority of cases  map ,  forEach ,  find  etc. can be used.  async function printFiles () { const files = await getFilePaths(); await Promise.all(files. map (async (file) => { const contents = await fs.readFile(file, 'utf8') console.log(contents) })); } const inventory = [ { name : 'apples' , quantity : 2 } , { name : 'bananas' , quantity : 0 } , { name : 'cherries' , quantity : 5 } ] ; const result = inventory . find ( ( { name } ) => name === 'cherries' ) ;   function getFirstMatching(array) { for (let item of array) { const result = heavyTransform(item); if (result) { return result; } } } Specifically this shuts down the whole no-restricted-syntax. If you want to cherry-pick, here is the current definition: 'no-restricted-syntax' : [ 'error' , { selector : 'ForInStatement' , message...
Post a Comment
Read more

setup git account on mac with ssh - push to remote denied with other login

http://burnedpixel.com/blog/setting-up-git-and-github-on-your-mac/#generatenewkey “ SSH  uses public-key cryptography to authenticate the remote computer and allow it to authenticate the user, if necessary. There are several ways to use SSH; one is to use automatically generated public-private key pairs to simply encrypt a network connection, and then use password authentication to log on.” An SSH key basically lets your computer uniquely identify itself when it connects to servers. If Github is aware of the key your computer is using, you won’t have to enter your Github username/password every time you connect. Check for pre-existing SSH keys on your computer Let’s see if your computer has one or more keys already installed: 1 2 # Point the terminal to the directory that would contain SSH keys for your user account. $ cd ~/.ssh If you get the response “No such file or directory”, skip to  Generate a new SSH Key . Otherwise, you’ll need to backup...
Post a Comment
Read more

fs.writeFile - permission issue on GCP (Google Cloud Run)

error on this: fs . writeFile ( fileName , pdfBytes , err => { if ( err ) { console . log ( err . message ) reject ( err . message ) } else resolve ( fileName ) }) #1 It looks like when deployed into Cloud Run it also requires the extra permission "Service Account Token Creator" to run  getSignedUrl . Locally for some reason this role is not required. #2 Only the directory  /tmp  is writable in Cloud Run. So, change the default write location to write into this directory. However, you have to be aware of 2 things: Cloud Run is stateless, that means when a new instance is created, the container start from scratch, with an empty  /tmp  directory /tmp  directory is an in-memory file system. The maximum allowed memory on Cloud Run is 2Gb, your app memory footprint included. In addition of your file and Airflow, not sure that you will have a lot of space. A final remark. Cloud Run is active only when it...
Post a Comment
Read more