Blog - LINE ENGINEERING

TAG ARCHIVES: Server-side

Using Circuit Breakers with Armeria
Seunghwan Joo2020-07-08
Seunghwan is in charge of LINE OpenChat back-end development
What is a circuit breaker? Suppose an unexpected failure occurs (For example, a network issue or a server crash) and a remote server is unable to respond to the request. If so, the client who made the request to the remote server will either wait for a response until a timeout occurs, consume resources, or eventually continue to send unnecessary requests. And on a Microservice Architecture (MSA), this client can also be a server for other services. In the end, clients of this server will have
- Server-side
- Armeria
- Java
Let's Play with Reactive Streams on Armeria – Part 2
Ikhun Um2020-07-03
Ikhun is developing for open-source Armeria and Central Dogma at LINE Plus.
In the first part of this blog post, we took a look at the basic concepts of Reactive Streams. In part 2 of this blog post, I'd like to tell you about how we use Reactive Streams with Armeria. What’s Armeria? Armeria is an open-source asynchronous HTTP/2, RPC, REST client/server library based on Java 8, Netty, Thrift, and gRPC. While Armeria is a lightweight microservices framework, its capabilities is comparable to existing full stack web frameworks. Let's first take a look at so
A new challenge for LINE Timeline - 1
Kyoungbok Lee2020-05-13
I am a senior developer working on our Social Platform
Foreword A feature called "Discover" (known as "Explorer" in regions outside of Japan) and a new subscription model called "Follow" have been added to the LINE Timeline service. Although users are familiar with these features, we ended up writing this post because we wanted to share the parts that we had considered and made efforts on within these features. Starting with this introduction, we have planned a three-part series to bring you more detailed information. LINE Timeline's New Ch
- Server-side
- Data/AI
Let's Play with Reactive Streams on Armeria - Part 1
Ikhun Um2020-05-06
Ikhun is developing for open-source Armeria and Central Dogma at LINE Plus.
What is Reactive Streams? In this post, I'd like to introduce the basic concept of Reactive Streams, and how to use Reactive Streams with Armeria, the open-source asynchronous HTTP/2, RPC, REST client/server library. Let's begin by examining what Reactive Streams is. The official homepage of Reactive Streams defines it as follows. Reactive Streams is a standard for asynchronous data processing in a streaming fashion with non-blocking back pressure. Let's take a closer look at wh
How LINE messaging servers prepare for New Year's traffic
Lee Kyoung Chan / Han Seung Wook2020-04-14
Kyoung-Chan and Seung-Wook are in charge of LINE messaging servers
This post is the result of the combined efforts and work of many. We'd like to thank all of you who were involved in preparation for New Year's traffic. Getting started LINE shows a unique traffic pattern typical to online messaging apps. This happens at the midnight of December 31st when users start to share New Year's greetings via messaging apps, significantly increasing the traffic volume compared to the usual average. During this time of the year, the traffic volume growth shows v
- Server-side
Presenting on RedisConf18
Jongyeol Choi2018-06-17
As a member of the Storage team for LINE Messenger Server, I develop modules related to Redis.
Hello, I am Jongyeol Choi, a member of the Redis team at LINE. LINE's services use various storage systems based on their needs. Our messaging service uses various open source storage systems such as Redis, HBase, and Kafka. As a member of the Redis team, I participated the RedisConf18 conference in San Francisco in U.S.A, on April 26th, as a speaker. The topic of my session was, "Redis at LINE, 25 billion messages per day". I'd like to take this opportunity to share the presentation preparation
Functional programing language and LINE GAME Cloud
Bu Sung Kim, Jae Ho Lee2018-02-25
Bu Sung: Develops the LINE GAME Promotion platform. He is interested in programming languages and started learning Kotlin just recently. Jae Ho: Is a Game Tech PM at LINE. His recent interest is JavaScript.
We are junior engineers, Bu Sung Kim and Jae Ho Lee at LINE, working on the LINE GAME Platform. We have a great interest in functional programming languages. It all started with learning that the LINE GAME Cloud is developed in Clojure, one of functional programming languages. On this post, we would like to take you through some of the characteristics of functional programming languages in association with the use cases of the LINE GAME Cloud. LINE GAME Cloud & Functional Programming LINE GA
Introducing the LINE Login Platform
LINE Engineering2015-07-23
LINE Engineering Blog official account
LINE publicly released its Login Platform on June 30, 2015, allowing other services to take advantage of its robust features. In this article, we look at the details of the newly released LINE Login Platform. We are also pleased to introduce the LINE developers site to the public. It’s packed with everything you’ve ever wanted to know about the technical side of LINE, so check it out to see all of the features the platform has to offer! What is the LINE Login Platform? The LINE Login
- Server-side
- LINE Login
The 7 Ways of Counting Characters
LINE2015-03-10
LINE Dev
Hello, I am SJ, an engineer working at LINE.In this post, I would like to talk about counting characters. There are many places in various LINE services where the number of characters must be counted such as profile or group names, and status messages. Counting the characters on-screen is important for several reasons. The text must not be shorter or longer than necessary, and storage capacity must be allocated accordingly. As LINE is used worldwide, it is crucial that string length can be preci
- Server-side

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