README.md

Facility Location Problem (Java, Quarkus, Maven)

Pick the best geographical locations for new stores, distribution centers, covid test centers or telco masts.

Constraints

Name	Level	Description
Facility capacity	Hard	A facility's total assigned demand must not exceed its capacity.
Setup cost	Soft	Minimize the total setup cost of opened facilities.
Distance from facility	Soft	Minimize the total distance from consumers to their assigned facility.

• Run the application
• Run the packaged application
• Run the application in a container
• Run it native

Prerequisites

1. Install Java and Maven, for example with Sdkman:

   $ sdk install java
   $ sdk install maven

Run the application

1. Git clone the timefold-quickstarts repo and navigate to this directory:

   $ git clone https://github.com/TimefoldAI/timefold-quickstarts.git
   ...
   $ cd timefold-quickstarts/java/facility-location

2. (Optional) If you want to run a licensed edition (Plus / Enterprise), set up your license key first. See the Timefold license tool for instructions.

3. Start the application with Maven:

   1. Community Edition

      $ mvn quarkus:dev

   2. Plus / Enterprise Edition: The profile sets up the correct Maven artifacts to run the licensed version. See the pom.xml for the implementation details.

      $ mvn quarkus:dev -Denterprise

4. Visit http://localhost:8080 in your browser.

5. Click on the Solve button.

Then try live coding:

• Make some changes in the source code.
• Refresh your browser (F5).

Notice that those changes are immediately in effect.

Run the packaged application

When you're done iterating in quarkus:dev mode, package the application to run as a conventional jar file.

1. Compile it with Maven:

   $ mvn package

2. Run it:

   $ java -jar ./target/quarkus-app/quarkus-run.jar

   Note To run it on port 8081 instead, add -Dquarkus.http.port=8081.

3. Visit http://localhost:8080 in your browser.

4. Click on the Solve button.

Run the application in a container

1. Build a container image:

   $ mvn package -Dcontainer

2. Run a container:

   $ docker run -p 8080:8080 --rm $USER/facility-location:1.0-SNAPSHOT

Run it native

To increase startup performance for serverless deployments, build the application as a native executable:

1. Install GraalVM and gu install the native-image tool.

2. Compile it natively. This takes a few minutes:

   $ mvn package -Dnative -DskipTests

3. Run the native executable:

   $ ./target/*-runner

4. Visit http://localhost:8080 in your browser.

5. Click on the Solve button.

More information

Visit timefold.ai.