Custom Extension which executes code only once before all tests are started and after all tests finished

SystemSetupExtension

/**
 * Custom Extension which executes code only once before all tests are started and after all tests finished.
 * This is temporary solution until https://github.com/junit-team/junit5/issues/456 will not be released
 */

public class SystemSetupExtension implements BeforeAllCallback, ExtensionContext.Store.CloseableResource {

    private static boolean systemReady = false;

    /**
     * Separate method with 'synchronized static' required for make sure procedure will be executed
     * only once across all simultaneously running threads
     */
    synchronized private static void systemSetup() throws Exception {
        // 'if' is used to make sure procedure will be executed only once, not before every class
        if (!systemReady) {
            systemReady = true;
            initialSystemSetupExecutedOnce();
        }
    }

    /**
     * Initial setup of system. Including configuring services,
     * adding calls to callrec, users to scorecard, call media files
     *
     * @param context junit context
     */
    @Override
    public void beforeAll(ExtensionContext context) throws Exception {
        systemSetup();
        context.getRoot().getStore(GLOBAL).put(systemReady, this);
    }

    /**
     * CloseableResource implementation, adding value into GLOBAL context is required to  registers a callback hook
     * With such steps close() method will be executed only once in the end of test execution
     */
    @Override
    public void close() throws Exception {
        // clean data from system
            finalTearDownExecutedAfterAllTests();
            
    }

}