Introduction

What is Reveal

Embedded Reveal Dashboard in Application

Reveal Embedded is a data visualization SDK that can be embedded in your application. With a simple pricing structure and ease of embedding, you can maximize the value of your application.

Select the target site

List of famous IT event sites

First of all, I list the event sites that I have used.

connpass
Doorkeeper
ATND
TECH PLAY

Finally narrowed down to two (connpass and Doorkeeper)

Collect Java information at each site I decided to collect data for connpass and Doorkeeper who got a decent volume.

connpass Get results from category "Java". Since 9 communities were hit, we decided to analyze these. https://connpass.com/category/Java/
Doorkeeper Get results from the topic "Java". Since 49 communities were also hit, we decided to analyze these. https://www.doorkeeper.jp/topics/java
ATND https://atnd.org/events/search?q%5Battendee_gteq%5D=1&q%5Btitle_or_description_or_place_or_address_cont%5D=Java -> As of December 18, 2019, the number of events was 3, so this time it is excluded.
TECH PLAY -> Due to the nature of TECH PLAY, which performs cross-search, connpass and Doorkeeper are also targeted, so I excluded this time.

Data collection target

connpass connpass gets the total number of members belonging to the group of category "Java".

Doorkeeper Doorkeeper gets the total number of members belonging to the community of the topic "Java" (*)

Doorkeeper can also know the number of followers of the topic, but in order to carry out the counting procedure as close as possible to connpass, it is the total number of members belonging to the community.

Collection result

The results of the muddy collection are summarized in Excel below. (tired...) https://github.com/furugen/Reveal-Samples/raw/master/1218-RevealApp/CommunityData-Doorkeeper-connpass.xlsx

We have simply provided 3 columns.

--Site ... connpass / Doorkeeper --Community name ... Community name --Number of community members ... Number of participating members

Create dashboard with Reveal

What was made

How to make a dashboard

We will publish a separate video! (Coming soon)

Summary

** Doorkeeper is a must if Java users are looking for tech events! ** **

Doorkeeper is overwhelmingly Java users! The difference was about 8 times or more. This is probably the result of the Japan Java User Group, which ranks first in the community with the highest number of members, and the Japan Spring User Group, which ranks second, leading the Java community.

As an aside, I'm happy that Java Kueche (Okinawa), which I used to belong to, is ranked in the top community.

Recently, I often searched for tech events with connpass, but when I tried to search for Java events after a long time, I felt "that? There are few Java events ...?" Depending on the event site, each has its own characteristics, so those who use it must be careful.

This article was Java, but I'd like to visualize .NET (probably strong connpass) and other languages if I have a chance.

I will write an article about Reveal again next time, so please have a look if you are interested!

What event sites do Java users often see? I tried to visualize the data collected by connpass and Doorkeeper with Reveal.