Introduction

This is the source tree for Alitheia Core, a platform for software analytics and software engineering research.

The README gives an overview of how the source tree is organised and sort instructions on how to use and develop for Alitheia Core. More documentation is always available at the project's web site at

http://www.sqo-oss.org

Source Organisation

You can find the following files and directories here:

LICENSE These are the licenses that apply to the software included in this source tree. The LICENSE file applies to Alitheia itself, and is the 2-clause BSD license. Other parts of the system may have different licenses, and these are contained in separate files. Many software components used in (or by) Alitheia fall under that Apache License, version 2.

pom.xml As any other modern Java project, Alitheia Core uses maven for building. We also use the Pax OSGi tools. You need to have those installed if you plan to add functionality or external libraries to Alitheia Core

alitheia/ Contains the Alitheia Core source code (under core/) and modules for the programmating interfaces to the system.

external/ External libraries (actually library references) to be bundled as OSGi bundles at complile time.

metrics/ Contains the source code of the various metric plug-ins developed for the Alitheia system. Each metric is a self-contained codebase.

plug-ins/ Code for data and updater plug-ins.

ui/ Source code for a simple client to the Alitheia Core REST api.

Getting the code

The source code to Alitheia Core is maintained on Github, using the Git version control system. To get the code (including development history) Git must be installed. Git can be downloaded from: http://git-scm.com/download

Without a Github account, the code can be checked out as follows:

git clone git://github.com/istlab/Alitheia-Core.git

Courtesy of Github, a zip of the current latest version of the software can be downloaded from https://github.com/istlab/Alitheia-Core/zipball/master.

Compiling, running and developing

Note: More instructions can be found at the online Quickstart guide at http://www.sqo-oss.org/quickstart.

Alitheia Core is build using Maven (tested with version > 3). You can download Maven from the following link: http://maven.apache.org/.

Choosing the Database Backend

Alitheia Core supports two database backends: H2 and MySQL.

Note: The configuration should always be enabled prior to compilation.

By default, Alitheia Core uses H2 (http://www.h2database.com/html/main.html) as its database backend. This should be ok for a local installation and experimentation, but in general it is recommended to use MySQL.

Enabling Support for MySQL

To enable support for MySQL the following steps must be followed:

1. Edit the file Alitheia­‐Core/pom.xml:

a. Comment out the following lines:

<eu.sqooss.db>H2</eu.sqooss.db>
<eu.sqooss.db.host>localhost</eu.sqooss.db.host>
<eu.sqooss.db.schema>alitheia;LOCK_MODE=3;MULTI_THREADED=true</eu.sqooss.db.sche
ma>
<eu.sqooss.db.user>sa</eu.sqooss.db.user>
<eu.sqooss.db.passwd></eu.sqooss.db.passwd>
<eu.sqooss.db.conpool>c3p0</eu.sqooss.db.conpool>

b. Uncomment the following lines:

<eu.sqooss.db>MySQL</eu.sqooss.db>
<eu.sqooss.db.host>localhost</eu.sqooss.db.host>
<eu.sqooss.db.schema>alitheia</eu.sqooss.db.schema>
<eu.sqooss.db.user>alitheia</eu.sqooss.db.user>
<eu.sqooss.db.passwd>alitheia</eu.sqooss.db.passwd>
<eu.sqooss.db.conpool>c3p0</eu.sqooss.db.conpool>

2. Edit the MySQL main configuration file (usually named /etc/my.cnf) and add the following lines:

default-­‐storage-­‐engine=innodb
transaction_isolation=READ-­‐COMMITTED

The above lines enable innodb as default.

3. Create an empty database named alitheia. Then create a database user named alitheia with password alitheia and grant full control over the database (@localhost):

CREATE USER 'alitheia'@'localhost' IDENTIFIED BY 'alitheia';
CREATE DATABASE alitheia;
GRANT ALL PRIVILEGES ON alitheia.* TO alitheia@'localhost';

Building the project

• To build the project, do:

  mvn install

Run the project

• To run Alitheia Core, run:

  mvn pax:provision

  Then visit the web interface: http://localhost:8080

• To see the results of runned plugins of projects, run the following from the web folder:

  mvn jetty:run

  Then visit the web interface: http://localhost:8081

• To debug Alitheia Core (on Unix-based systems):

  mvn install pax:provision
  [quit the OSGi prompt]
  ./debug.sh

Then you can connect a remote Java debugger to port 8000 on localhost.

• To develop for Alitheia Core:

  • To develop a metric plug-in: see metrics/README.txt
  • To develop a data plug-in: see plug-ins/README.txt

  Any tool can be used to write code for Alitheia Core, but using Eclipse will simplify things a lot. Instructions can be found in IDE.md