RA-SZZ

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RA-SZZ (Refactoring Aware - SZZ) is an improved and open source implementation of SZZ algorithm initially proposed by Sliwerski, Zimmermann, and Zeller (2005). RA-SZZ is designed to find bug introducing changes starting from bug-fix commits. RA-SZZ can identify refactoring operations on bug-fix changes to avoid false positives on the generated results.

This project uses other projects as dependencies:

• RefDiff
• DiffJ
• RefactoringMiner

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Overview

RA-SZZ is composed of five modules (or subprojects), which are listed below:

• connector-core
• DiffJ
• Refactoring_Miner_Adapted
• refdiff-core
• RA-SZZ

Building RA-SZZ

Currently, RA-SZZ uses Apache Ant as the building tool for its core components. In order to run RA-SZZ, the components should be build in the following order (assuming you are at the raszzprime/ directory).

$ cd core-connector
$ ant clean
$ ant compile

$ cd ../DiffJ
$ ant clean
$ ant compile

$ cd ../RefactoringMiner_Adapted
$ ant clean
$ ant compile

$ cd ../refdiff-core
$ ant clean
$ ant compile

$ cd ../RA-SZZ
$ ant clean
$ ant build

Running RA-SZZ

Use the following command to run the RA-SZZ algorithm:

java -cp "raszzprime/core-connector/build/classes:raszzprime/core-connector/libs/*:raszzprime/DiffJ/build/classes:raszzprime/DiffJ/libs/*:raszzprime/RefactoringMiner_Adapted/build/classes:raszzprime/RefactoringMiner_Adapted/libs/*:raszzprime/refdiff-core/build/classes:raszzprime/refdiff-core/libs/*:raszzprime/RA-SZZ/libs/*:raszzprime/RA-SZZ/build/classes" br.ufrn.raszz.miner.szz.RaSZZ

java --class-path "raszzprime/core-connector/build/classes:raszzprime/core-connector/libs/*:raszzprime/DiffJ/build/classes:raszzprime/DiffJ/libs/*:raszzprime/RefactoringMiner_Adapted/build/classes:raszzprime/RefactoringMiner_Adapted/libs/*:raszzprime/refdiff-core/build/classes:raszzprime/refdiff-core/libs/*:raszzprime/RA-SZZ/libs/*:raszzprime/RA-SZZ/build/classes" br.ufrn.raszz.miner.szz.RaSZZ

Please, note that you need to replace the ':' by ';' on Windows systems.

SZZ will then prompt for the project that it should work on. You must inform one of the 'projectnames' that are available on the 'linkedissuessvn' table. To check the available projectname on the linkedissuessvn table, you can run the following sql query

select distinct(projectname) from linkedissuessvn order by projectname;

Configuring the Database

This RA-SZZ implementation relies on a database to function. Please, download the database on the link below.

• bkp_raszz_structure.backup

The link should provide you a Postgres backup file. Once you have installed the Postgres database in your computer, you can load the database backup via the pGAdmin tool that comes along with the installation.

pg_restore -h localhost -p 5432 -U szz -d raszznew -v "raszzprime/bkp_raszz_structure.backup"

RA-SZZ will read the bug-fixing hashes per analyzed project from the 'linkedissuessvn' table. For each commit hash that RA-SZZ processes, it will store the bug-introducing changes into the 'bicraszzgit' table.

Every time RA-SZZ processes a commit hash, it stores that hash into the szz_project_lastrevisionprocessed, so that RA-SZZ does not need to process the commit hash again in case the execution has been halted. Therefore, if it is intended to reset the results obtained by RA-SZZ to a given project, the data within the szz_project_lastrevisionprocessed must be deleted.

hibernate.cfg.xml

RA-SZZ uses the Hibernate framework to interact with its database. Therefore you will need to configure the hibernate.cfg.xml file that is located within the RA-SZZ/src/ directory. More specifically, the properties below should be specified.

<!-- Database connection settings -->
<property name="connection.driver_class">org.postgresql.Driver</property>
<property name="connection.url">jdbc:postgresql://localhost:5432/mydatabase</property>
<property name="connection.username">postgres</property>
<property name="connection.password">mypassword</property> 

raszzprime