Blog - LINE ENGINEERING

TAG ARCHIVES: Server-side

【Internship】Reliable and consistent metric anomaly detection algorithms
Fu Xinghong2023-09-19
Messaging Server Dev TeamA
Nice to meet you! I'm Shin, a rising sophomore at the Massachusetts Institute of Technology studying mathematics and computer science. I'm very grateful to have been given the opportunity to spend an amazing six weeks at the LINE Tokyo office to work on an exciting internship project: "Improving reliability and consistency in metric anomaly detection". Not only was it one of my first few work experiences in the tech industry, it was also my first time in Japan. There were so many learning experi
Takeaways from the closure of LINE LIVE
Hieu Do Duc2023-08-31
Android Mobile Developer from LTV
We have carried out the closure of the LINE LIVE app. Given that this app had a substantial user base, with many users potentially having made significant payments within the app, we couldn't abruptly remove the app from the store and cease user support. Some of the challenges we needed to tackle included notifying users, offering compensation, and determining how to secure users' acceptance while preserving their trust in our company and group. The plan Step 1: Notification To widely disse
- Server-side
- LINE LIVE
How I made a Figma translation plugin with Vue.js after a couple of drinks
Min Seob Kim2023-07-28
In charge of backend development at ABC Studio.
Hello. I'm Minseob Kim, a backend developer at LINE ABC Studio. In this post, I'd like to share our recent experience building a Figma translation plugin using Papago. While I won't go into detail on how to build the plugin or go down to the code level, I'll focus on the challenges we faced while building the plugin, how we solved them, and the process we went through as a team. When developing Figma plugins, the Figma Developers site is a good place to start. You'll also need knowledge of HTML
- Server-side
- Front-End
Improving the Messaging Server development process
Takatoshi Nao2023-02-12
Takatoshi is a developer of LINE's Messaging Server.
Hello, everyone. I'm Nao, a developer of LINE's Messaging Server. In 2014 we introduced a new development and release process for LINE Server (Blog post in Japanese only). Since then, the development environment and code has changed. In this post, I'd like to introduce the points that have been improved. LINE's Messaging Platform consists of many Server Applications. One of them, Messaging Server, is a platform responsible for messaging functions, and we're working on mu
- Server-side
A story of introducing data lineage into LINE's large-scale data platform
Shinji Shimamura2022-11-24
IU Dev Team manager, Data Platform Department
Hi, this is Shinji Shimamura from the IU Dev team in the Data Platform Division. The Data Platform Division operates a data analysis platform with a size of approximately 400 petabytes. This data platform, called Information Universe (IU), collects, processes, analyzes, and visualizes data generated from LINE’s various applications so that LINE employees can utilize them. My team, namely the IU Dev team, has been developing "IU Web", which is used by every service in the LINE Group, provid
Kotlin JDSL: Let's use Kotlin to easily write reactive Criteria API
Hyunsik Kang2022-09-08

This is the second post in a series about Kotlin JDSL. In the last post, Kotlin JDSL: Writing JPA Criteria API more easily with Kotlin, we looked into the background of why we developed Kotlin JDSL and how we use it. In this post, we'll be looking at Kotlin JDSL Reactive modules. While many of you might have a preconceived notion that JPA cannot be reactive, Hibernate released a reactive JPA library called Hibernate Reactive. If you would like to know more about reactive programming,
- Server-side
- Open Source
Unification of Group Chat on the LINE App
Takatoshi Nao / Kuang Fu2022-02-24
Takatoshi Nao and Kuang Fu are in charge of LINE messaging servers
LINE supports not only one-on-one but multi-user conversations as well. There were two types of multi-user conversations in LINE, Rooms and Groups, for different uses. Rooms were designed for temporary conversations in general. When creating a Room, you didn't need to give it a name. When inviting a friend into the Room, you didn't need to wait for their approval, they joined the conversation immediately after you pressed the Invite button. Everything was des
- Server-side
【Internship Report】 Implementation of the IU Web search completion function
Ryoto Suzuki2021-11-05
Hello. My name is Ryoto Suzuki. I am a first-year master's student at the Graduate School of the University of Tokyo. I participated in the LINE internship of the engineer/working-type course for six weeks from August 23rd. During this internship, I belonged to the IU Dev Team of the Data Platform Department and was engaged in the improvement of the search function of the data catalog "IU Web," which was used in LINE. In this blog, I will introduce the details. Background About IU Web Refe
Customizing Armeria metrics
Seunghwan Joo2021-08-04
Seunghwan is in charge of LINE OpenChat back-end development
In my last post, Monitoring Prometheus metrics from Armeria, we took a look at how you can monitor Armeria metrics using Grafana. In this post, I would like to show you how you can customize Armeria metrics to suit your needs. The sample code in this post uses the same sample code from Monitoring Prometheus metrics from Armeria. Customizing metrics prefixes using MeterIdPrefixFunction In the last post I mentioned that you can customize the default prefix appended to metrics by us
- Server-side
- Armeria
- Java
Monitoring Prometheus metrics from Armeria
Seunghwan Joo2021-07-09
Seunghwan is in charge of LINE OpenChat back-end development
In this post, we'll be taking a look at how you can monitor Prometheus metrics collected with Armeria. For those of you who are trying Armeria for the first time, I will be adding simple practice samples so that you can follow along. Practice exercise The practice session was designed on macOS Big Sur. Let's now take a look at how you should install and configure Gradle, Prometheus, and Grafana to run the samples, and see what the results are. Configuring Gradle
- Server-side
- Armeria
- Java

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