ojAlgo-gurobi

ojAlgo and GUROBI integration

License	MIT
GroupId	org.ojalgo
ArtifactId	ojalgo-gurobi
Last Version	3.0.0
Release Date	Mar 24, 2021
Type	jar
Description	ojAlgo-gurobi ojAlgo and GUROBI integration
Project URL	http://ojalgo.org
Project Organization	Optimatika
Source Code Management	https://github.com/optimatika/ojAlgo-gurobi

Download ojalgo-gurobi

Filename	Size
ojalgo-gurobi-3.0.0.pom
ojalgo-gurobi-3.0.0.jar	10 KB
ojalgo-gurobi-3.0.0-sources.jar	5 KB
ojalgo-gurobi-3.0.0-javadoc.jar	28 KB

How to add to project

Apache Maven

<!-- https://jarcasting.com/artifacts/org.ojalgo/ojalgo-gurobi/ -->
<dependency>
    <groupId>org.ojalgo</groupId>
    <artifactId>ojalgo-gurobi</artifactId>
    <version>3.0.0</version>
</dependency>

Gradle Groovy

// https://jarcasting.com/artifacts/org.ojalgo/ojalgo-gurobi/
implementation 'org.ojalgo:ojalgo-gurobi:3.0.0'

Gradle Kotlin

// https://jarcasting.com/artifacts/org.ojalgo/ojalgo-gurobi/
implementation ("org.ojalgo:ojalgo-gurobi:3.0.0")

Apache Buildr

'org.ojalgo:ojalgo-gurobi:jar:3.0.0'

Apache Ivy

<dependency org="org.ojalgo" name="ojalgo-gurobi" rev="3.0.0">
  <artifact name="ojalgo-gurobi" type="jar" />
</dependency>

Groovy Grape

@Grapes(
@Grab(group='org.ojalgo', module='ojalgo-gurobi', version='3.0.0')
)

Scala SBT

libraryDependencies += "org.ojalgo" % "ojalgo-gurobi" % "3.0.0"

Leiningen

[org.ojalgo/ojalgo-gurobi "3.0.0"]

Dependencies

compile (1)

Group / Artifact	Type	Version
org.ojalgo : ojalgo	jar	48.4.1

test (4)

Group / Artifact	Type	Version
org.ojalgo : ojalgo	test-jar	48.4.1
org.junit.jupiter : junit-jupiter-api	jar	5.7.1
org.junit.jupiter : junit-jupiter-engine	jar	5.7.1
org.junit.jupiter : junit-jupiter-params	jar	5.7.1

system (1)

Group / Artifact	Type	Version
gurobi » gurobi	jar	9.1.1

Project Modules

There are no modules declared in this project.

ojAlgo Gurobi integration

Use Gurobi from within ojAlgo – use Gurobi as a solver from ExpressionsBasedModel.

When/if ojAlgo's built-in optimisation solvers are not capable of solving your model (fast enough) it is possible to plug in other solvers. Gurobi is one such solver where an integration already exists.

Prerequisites

• Basic knowledge of how to use ojAlgo to model and solve optimisation problems
• Gurobi is installed and functional

This is what you need to do

• Add this dependency to your project. Here's how to do that using maven:

<!-- https://mvnrepository.com/artifact/org.ojalgo/ojalgo-gurobi -->
<dependency>
    <groupId>org.ojalgo</groupId>
    <artifactId>ojalgo-gurobi</artifactId>
    <version>X.Y.Z</version>
</dependency>

• That POM declares properties that are paths to where the jar and native binaries are installed. You need to set these properties to match your installation:

<properties>
    <!-- You have to change this! -->
    <path.installation.gurobi>/Library/gurobi751</path.installation.gurobi>
    <path.jar.gurobi>${path.installation.gurobi}/mac64/lib/gurobi.jar</path.jar.gurobi>
    <path.native.gurobi>${path.installation.gurobi}/mac64/bin</path.native.gurobi>
</properties>

• When you run your program the JVM property 'java.library.path' must contain the path to the Gurobi binary. In my case the path is: '/Library/gurobi751/mac64/bin'

• To configure ExpressionsBasedModel to use Gurobi rather than ojAlgo's built-in solvers execute this line of code:

ExpressionsBasedModel.addPreferredSolver(SolverGurobi.INTEGRATION);

• If you only want to use Gurobi when the built-in solvers cannot handle a particular model you should instead do this:

ExpressionsBasedModel.addFallbackSolver(SolverGurobi.INTEGRATION);

Optimatika

Versions

Version
3.0.0 Mar 24, 2021
2.47.2 Dec 19, 2018