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Keikai Tutorial

This project demonstrates Keikai and how to build an application with its Java client API.

Prerequisite

You need to download and start keikai server before running this project.

  1. Please download keikai server at https://keikai.io according to your OS system
  2. unzip the downloaded zip file
  3. run the executable command inside the extracted folder:
  • Mac/Linux

./keikai

  • Windows

keikai.bat

After executing the command, you should see some messages like:

1:8888:2018-06-05 09:52:18.059549Z:keikai_dart_server:keikai_server:0
INFO: Keikai version: 1.0.0-alpha.0@jhsioate
...
INFO: Rikulo Stream Server 1.7.0 starting on 0.0.0.0:8888
...

Then keikai server starts up successfully at localhost:8888

Keikai Server Options

With different port and address

./keikai —port=9999 —address=192.168.1.1

Help

For other options, you can check with the command:

./keikai --help

How to Run This Project

You can run this project with a gradle wrapper without installing anything in advanced (gradle wrapper will install necessary files for you). Just run the following command in your command line interface:

  • Linux / Mac

./gradlew appRun

  • Window

gradlew appRun

Then visit the following URL with your browser:

Connect to a Different Keikai Server Address

By default, this project connects to a Keikai server at localhost:8888. If you want to connect to a different address, please append a query string with key server:

http://localhost:8080/tutorial/editor?server=10.1.1.1:8888

Supported Browser

Chrome, Firefox, IE 11+

Supported File Format

Microsoft Excel Open XML Document (.xlsx) only

Scenarios to Demonstrate

Excel File Editor

You can upload an Excel file and edit it in a browser. Please visit http://localhost:8080/tutorial/editor with you browser.

If you fail to import an xlsx file, please kindly send it to [email protected]

Working with a Database

It shows you how to import data from a database, and you can edit values in cells then save them back to the database. We just demonstrate one possible way, you can definitely load data from any other data repository by yourselves.

  • This project saves data into HSQLDB

Please visit http://localhost:8080/tutorial/app with you browser.

Project Architecture

architecture.png

  • When calling Keikai Java client API, it communicates with Keikai server.
  • Keikai server communicates with Keikai client in a browser to render a sheet and exchange data.