paambaati

Designing an Undo system on the backend (v2)

Updates to implementation details based on today's call –

1. On an update call, make the client send a "snapshot" of the current record, along with the incoming UPDATE payload and save these to cache. Let's call this v1.

2. Generate the UPDATE query, execute it, and return the updated payload as usual, along with a unique undo_id. Additionally, save these to cache as well. Let's call this v2.

3. Now if the API consumer needs an undo, they need to send the undo_id, with which we should be able to look up both the v1 record, the v2 record, do a diff and execute a new UPDATE query that rolls back v2 to v1.

paambaati

FROM golang:alpine AS builder
# Install git.
# Git is required for fetching the dependencies.
RUN apk update && apk add --no-cache git
WORKDIR $GOPATH/src/vserver/
COPY . .

# Fetch dependencies.
# Using go get.
RUN go get -d -v

paambaati

#DEBUG
git notes --ref semantic-release list

# REFER: https://github.com/semantic-release/semantic-release/blob/master/docs/support/troubleshooting.md#release-not-found-release-branch-after-git-push---force
git tag --delete v4.0.0
git push --delete origin v4.0.0
git tag v4.0.0 cdbb31e9cece505753becbfccc7ab64665a4cca5 # Commit that created the release
git notes --ref semantic-release add -f -m '{"channels":[null]}' v4.0.0
git push --force origin refs/notes/semantic-release

paambaati

import { createReadStream } from 'fs';
import { NODE_STREAM_INPUT, parse } from 'papaparse';

(async () => {
    const csvStream = createReadStream('machine-readable-business-employment-data-mar-2023-quarter.csv');
    const parseStream = parse(NODE_STREAM_INPUT);
    csvStream.pipe(parseStream);
    const data: Array<Array<string>> = [];
    parseStream.on('data', (chunk: Array<string>) => {
        data.push(chunk);

paambaati

How to use this

node auditResolutions.js

This will print some output that looks like this –

{"css-select@npm:2.1.0/nth-check":">=2.0.1"}

paambaati

// Your main component.
const MyComponentWrapper = (props) => {
    // Watch changes to local storage, and if we logout in 1 tab,
    // logout in every other tab.
    const syncLogout = (event: StorageEvent): void => {
        if (event.key === 'logout') {
            Router.push('/login');
        }
    };

paambaati

import { forwardRef } from 'react';
import Select from 'react-select';
import { Controller } from 'react-hook-form';
import type { RefObject } from 'react';
import type { Props as ReactSelectProps } from 'react-select';

const Select = forwardRef(
    (props: SelectProps, ref: RefObject<HTMLSelectElement>) => {
        return (
            <Controller

paambaati

GRPC_VERBOSITY=DEBUG GRPC_TRACE=all yarn run debug
yarn run v1.17.3
$ ts-node src/debug.ts
D0908 08:17:51.870543000 4400821696 dns_resolver.cc:294]               Using native dns resolver
I0908 08:17:51.870996000 4400821696 timer_manager.cc:85]               Spawn timer thread
I0908 08:17:51.871014000 4400821696 init.cc:163]                       grpc_init(void)
I0908 08:17:51.871060000 123145562341376 timer_manager.cc:246]         timers not checked: expect another thread to
I0908 08:17:51.871069000 123145562341376 timer_manager.cc:194]         sleep until kicked
I0908 08:17:51.871329000 4400821696 completion_queue.cc:504]           grpc_completion_queue_create_internal(completion_type=0, polling_type=0)

paambaati

paambaati

#!/usr/bin/env python
# -*- coding: utf-8 -*-

import argparse
from os import environ
from json import load, loads, dumps
from urlparse import urlparse
try:
    from urllib.request import urlopen, Request
    from urllib.error import HTTPError