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gips-examples's Introduction

GIPS Examples

GIPS is an open-source framework for Graph-Based ILP Problem Specification. This repository holds some GIPS example projects.

Setup

  • Install GIPS as described in its repository.
  • Launch a runtime workspace (while using a runtime Eclipse) as stated in the eMoflon::IBeX installation steps. (Please refer to the installation steps of GIPS above.)
  • Use this PSF file to import all gips-example-related projects.
  • Build all your projects with the black eMoflon hammer. Sometimes, it is required to trigger a cleaning in Eclipse (Project -> Clean... -> Clean all projects).
  • You can now launch a GIPS project like org.emoflon.gips.gipsl.examples.mdvne:
    • Go to org.emoflon.gips.gipsl.examples.mdvne -> src-gen -> org.emoflon.gips.gipsl.examples.mdvne.api.gips in the project explorer.
    • Launch MdvneLauncher.launch with a right click -> Run As -> MdvneLauncher.
    • Please keep in mind that not every project contains a .launch file.
  • Some of the examples have a runnable Java class with a main function.

Example Overview

Name Description
classdiagram* Example GIPS-based solution of the TGG 3.0 prototype implementation (classes)
org.emoflon.gips.gipsl.examples.headlessrunner.* Example on how to build and use a GIPS project headlessly - export it to JAR and run it
org.emoflon.gips.gipsl.examples.helloworld Very simple hello world example for the GIPS language - can not be executed
org.emoflon.gips.gipsl.examples.mdvne.* Model-driven Virtual Network Embedding example with and without migration functionality
network.model Network (meta)model with converters and a manipulator for the MdVNE example
org.emoflon.gips.gipsl.examples.sdr.* Software-Defined Radio task scheduling on CPUs
PersonTaskAssignments/PTA* Person-to-Task Assignments for construction purposes
refactoringsoftwaresystemtgg3/SoftwareSystem Example GIPS-based solution of the TGG 3.0 prototype implementation (software system)

For more projects, refer to the GIPS test repository.

License

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

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gips-examples's Issues

MdVNE: Affected paths can lead to invalid embeddings

In some rare cases, the GIPS-based MdVNE algorithms can produce invalid embeddings of virtual networks onto substrate paths.

The edge case is:

  • one virtual link vl1 gets mapped to a substrate path sp1 that consists of one (or more) substrate link(s) sl1.
  • if another virtual link vl2 gets mapped to another substrate path sp2 that also (partly) consists of the substrate link sl1, its residual bandwidth value may be exceeded.

A test that sometimes shows this behavior is this test of the GIPS-based migration MdVNE algorithm: https://github.com/Echtzeitsysteme/iflye/blob/main/test.suite/src/test/algorithms/pm/migration/VnePmMdvneAlgorithmMigrationPathBandwidthBugTest.java

The more virtual networks one embeds at a time, the higher the probability to see triggering this error.

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