GIPS

GIPS is an open-source framework for Graph-Based ILP Problem Specification.

Installation (development)

• Install AdoptOpenJDK 21 (HotSpot JVM) or newer.
• Install eMoflon::IBeX as described here.
• Install at least one of the supported ILP solvers:
  • Install Gurobi in version 11.0.2 and activate a license for your computer.
    • Currently, Gurobi is the default ILP solver used in GIPS because of the great performance.
  • Install GLPK in the newest version (4.6.5) and add it to your path.
    • GLPK is an open-source ILP solver that can be used without a charge.
    • For Windows-based systems, follow these steps to install GLPK:
      • Download winglpk.
      • Extract the archive, e.g., to C:\Program Files\GLPK\glpk-4.65.
      • Add C:\Program Files\GLPK\glpk-4.65\w64 to the system-wide environment variable path.
      • Restart your Eclipse IDE.
  • Install CPLEX in version 22.1.1 and activate a license for your computer (if neccessary).
    • CPLEX is a commercial alternative to the other ILP solvers implemented in GIPS.
• Clone this Git repository to your local machine and import it into Eclipse: File -> Import -> General -> Existing Projects into Workspace. Import all projects.
  • As an alternative, you can use this PSF file for the import.
• Inside the Eclipse development workspace ...
  • ... Run Run all GIPS MWE2 files.launch from org.emoflon.gips.core/launch with right click Run As -> Build all GIPS MWE2 files.
  • ... build all projects (Project -> Clean... -> Clean all projects) to trigger code generation.
• Launch a runtime workspace (while using a runtime Eclipse) as stated in the eMoflon::IBeX installation steps to start using GIPS.

A good start point to verify your installation is to run some of the GIPS examples or the GIPS tests.

Code-Style

This project uses the built-in code-style and code-formatter of Eclipse. Before contributing, please set-up your Eclipse code-style settings as follows:

• Window -> Preferences -> Java
  • -> Code Style -> Clean Up -> Active profile: -> "Eclipse [built-in]" (default)
  • -> Code Style -> Formatter -> Active profile: -> "Eclipse [built-in]" (default)
  • -> Code Style -> _Organize Imports: -> "java, javax, org, com" (default)
  • -> Editor -> _Save Actions:
    • Check "Perform the selected actions on save"
    • Check "Format source code"
    • Check "Format all lines"
    • Check "Organize imports"
    • Check "Additional actions"

By using this settings, you should be unable to commit unformatted code.

Installation (user)

• Install AdoptOpenJDK 21 (HotSpot JVM) or newer.
• Install eMoflon::IBeX as described here.
• Install at least one of the supported ILP solvers:
  • Install Gurobi in version 11.0.3 and activate a license for your computer.
    • Currently, Gurobi is the default ILP solver used in GIPS because of the great performance.
  • Install GLPK in the newest version (4.6.5) and add it to your path.
    • GLPK is an open-source ILP solver that can be used without a charge.
  • Install CPLEX in version 22.1.1 and activate a license for your computer (if neccessary).
    • CPLEX is a commercial alternative to the other ILP solvers implemented in GIPS.
• Install GIPS from the public Eclipse update site: https://echtzeitsysteme.github.io/gips-updatesite/snapshot/updatesite/
• Launch a runtime workspace (while using a runtime Eclipse) as stated in the eMoflon::IBeX installation steps to start using GIPS.

Environment variables

When using GIPS within the Eclipse IDE, the following environment variables may be necessary for your runtime configuration:

# Linux/macOS
GRB_LICENSE_FILE=/home/mkratz/gurobi.lic
GUROBI_HOME=/opt/gurobi1103/linux64/
LD_LIBRARY_PATH=/opt/gurobi1103/linux64/lib/:/opt/ibm/ILOG/CPLEX_Studio2211/cplex/bin/x86-64_linux/
PATH=/opt/gurobi1103/linux64/bin/:/opt/ibm/ILOG/CPLEX_Studio2211/cplex/bin/x86-64_linux/:$PATH

# Windows
GRB_LICENSE_FILE=C:\Users\mkratz\gurobi.lic
GUROBI_HOME=C:\gurobi1103\win64
LD_LIBRARY_PATH=C:\gurobi1103\win64\lib;C:\Program Files\IBM\ILOG\CPLEX_Studio2211\cplex\bin\x64_win64\
PATH=C:\gurobi1103\win64\bin;C:\Program Files\IBM\ILOG\CPLEX_Studio2211\cplex\bin\x64_win64\

Usage (running simulations)

Please refer to the GIPS examples reposiory.

Tests

Please refer to the GIPS tests repository.

License

This project is licensed under the GNU General Public License v3.0 - see the LICENSE file for more details.