Wahlzeit - An Open Source Package to create Photo Rating Sites

PART I - INTRODUCTION

Wahlzeit is an open source web application that lets users upload photos and rate photos of other users, on a 1..10 scale. Users get to present their best photos and learn what other users thought of their photos.

Wahlzeit is used to teach agile methods and open source software development at the Professorship of Open Source Software at the University of Erlangen.

It is an easy-to-learn yet complete Java web application that is available under the GNU Affero Public License v3 license, see the LICENSE.txt file.

Wahlzeit is a Google App Engine app, that can be used on your local machine or be deployed to Google App Engine to reach it online.

For more information, see http://github.com/dirkriehle/wahlzeit and http://osr.cs.fau.de.

PART II: WAHLZEIT SETUP

First download repository:

1. Fulfill prerequisites: install Java JDK, set JAVA_HOME, and install git
2. open console and select the directory where the directory MigrateWahlzeitIntoTheCloud containing the sourcecode should be created
3. git clone https://github.com/tfrdidi/MigrateWahlzeitIntoTheCloud.git

Run Wahlzeit on your local machine

1. cd MigrateWahlzeitIntoTheCloud
2. ./gradlew appengineRun
3. wait until gradle and project dependencies are downloaded and the local instance is started

Open http://localhost:8080 to use Wahlzeit on your local machine.

Upload Wahlzeit to Google App Engine

Create an Google App Engine instance:

1. if you don't have already one, create a Google account
2. go to https://console.developers.google.com and login with your Google account
3. now you are in the developers console, there select "create a project" 1. choose a project name, which used later as your-project-ID 2. accept the terms of service

Configure your repository and upload Wahlzeit

1. store your your-project-ID in your repository: 1. open the file /MigrateWahlzeitIntoTheCloud/src/main/webapp/WEB-INF/appengine-web.xml 2. replace the project name with your-project-ID: <application>your-project-ID</application> 3. save and close the appengine-web.xml
2. ./gradlew appengineUpdate
3. a browser window pops up and asks for permission, accept it
4. copy the code from the following browser window to your gradle console
5. as Wahlzeit uses Google Datastore, enable billing/enter the test phase. It will never use that much quota, but it is necessary for Datastore (tip: 4683 4578 2937 6522 ;-) )
6. in the https://console.developers.google.com select Storage - Cloud Storage - Storage Browser
7. create a new bucket with the name org-wahlzeit-data, standard setting and location in EU

Open https://your-project-ID.appspot.com to use Wahlzeit on Google App Engine.

Done!