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Arseny Yankovsky ArsenyYankovsky

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ArsenyYankovsky / dynamodb-lock-item.ts

Last active December 2, 2023 02:11

Lock an item in DynamoDB for exclusive processing.

	/*
	Assuming you have a blog Posts table with the following structure:
	{
	// hash key
	"id": 154325,
	"title": "Things you need to know before going bouldering for the first time.",
	"text": "...",
	// represents unix time of a moment this record was locked at
	"lockedAt": 1684067555
	}

ArsenyYankovsky / full-parallel.js

Created September 6, 2020 16:48

	export const saveBooks = (books) => {
	const chunks = chunk(books, 100)

	return Promise.all(chunks.map(booksChunk => saveBooksChunk(booksChunk)))
	}

ArsenyYankovsky / parallel.js

Created September 6, 2020 16:46

	export const saveBooks = async (books) => {
	const chunks = chunk(chunk(books, 100), 10)

	const results = []

	for (const chunkOfChunks of chunks) {
	const chunkResults = await Promise.all(chunkOfChunks.map(saveBooksChunk))

	results.push(...chunkResults)
	}

ArsenyYankovsky / promise-pool.js

Created September 6, 2020 16:46

	export const saveBooks = async (books) => {
	const chunks = chunk(books, 100)

	const { results } = await PromisePool
	.withConcurrency(10)
	.for(chunks)
	.process(saveBooksChunk)

	return results
	}

ArsenyYankovsky / promise-pool.ts

Created September 6, 2020 16:43

	export const saveBooks = async (books) => {
	const chunks = chunk(books, 100)

	const { results } = await PromisePool
	.withConcurrency(10)
	.for(chunks)
	.process(saveBooksChunk)

	return results
	}

ArsenyYankovsky / gist:66cdbb7ecbb86c67a3b0

Created September 25, 2015 09:27


	srcToHttps: function (src) {
	if (!src) {
	return null;
	}
	if (src.indexOf('https') != -1) {
	return src;
	}
	if (src.indexOf('http://cs') != -1) {
	return "https://pp.vk.me/c" + src.replace("http://cs", "").replace(".vk.me", "");

ArsenyYankovsky / gist:02bc685d5c7e195a9fa3

Created June 28, 2014 12:38

	<%@ include file="/WEB-INF/jsp/include.jsp" %>

	<html>
	<head><title>Hello :: Spring Application</title></head>
	<body>
	<h1>Hello - Spring Application</h1>
	<p>Greetings, it is now <c:out value="${now}"/></p>
	</body>
	</html>

ArsenyYankovsky / HelloController

Created June 28, 2014 12:37

	package springapp.web;

	import org.springframework.web.servlet.mvc.Controller;
	import org.springframework.web.servlet.ModelAndView;

	import javax.servlet.ServletException;
	import javax.servlet.http.HttpServletRequest;
	import javax.servlet.http.HttpServletResponse;

	import org.apache.commons.logging.Log;