Copyright (C) 2015-2026 The Open Library Foundation

This software is distributed under the terms of the Apache License, Version 2.0. See the file "LICENSE" for more information.

The Okapi software has the following compile-time dependencies:

• Java 21 or 25

• Apache Maven 3.8.x or higher

The test suite has these additional dependencies:

• Docker, for details see https://java.testcontainers.org/supported_docker_environment/

• Ports 9230-9239 must be free

Note: If tests fail, the API Gateway may be unable in some cases to shut down microservices that it has spawned, and they may need to be terminated manually.

Before buliding, make sure your $JAVA_HOME environment variable is set correctly.

This can be done by one of the three ways described below:

1. For e.g., on Debain(and Debian-based) distros, run the following command to set the $JAVA_HOME for the current session:

  $ export JAVA_HOME=`readlink -f /usr/bin/javac | sed "s:bin/javac::"`

2. Or, you can add the following at the end of the ~/.profile for persistently setting $JAVA_HOME :

  $ echo export JAVA_HOME=`readlink -f /usr/bin/javac | sed "s:bin/javac::"` >> ~/.profile

Then run:

  $ source ~/.profile

You may need to log out and log in again or reboot for these changes to take effect.

This can be also achieved with sdkman which allows you to install local version of java, maven, etc.

To build and run:

$ mvn install
$ mvn exec:exec

Okapi listens on port 9130.

To build without running the test suite:

$ mvn install -DskipTests

When running unit tests, property testStorage controls what storage to use. It has a default value of inmemory,postgres,mongo. Tests will complete faster by specifying one storage type only.

For example:

$ mvn -DtestStorage=inmemory install

When filing bug reports with unit test output, always use Maven option -B to avoid control characters in output.

At Docker Hub:

• https://hub.docker.com/r/folioorg/okapi released versions
• https://hub.docker.com/r/folioci/okapi snapshot versions

See Automation/Docker Hub for details.

Docker images are the primary distribution model for FOLIO modules. To run the images you will need the Docker Engine or Docker Desktop runtime.

See project OKAPI at the FOLIO issue tracker

• Okapi Guide and Reference
• API: RAML and schemas and generated API documentation
• Documentation index
• Contributing guidelines
• Securing in the doc directory shows how to enable security-related modules.
• Folio Sample Modules. There is a decent README, and some minimal sample modules to get started with
• Other FOLIO Developer documentation is at dev.folio.org

SonarQube analysis