public abstract Object execute(String scriptType, String script);

    public void shutdown() {
        shutdownListener.onShutdown();
    }

    public void addShutdownListener(final ShutdownListener listener) {
        shutdownListener = listener;
    }

    public interface ShutdownListener {
        void onShutdown();
    }

            while (count != 0) {
                count = ComponentUtil.getThumbnailManager().generate(executorService, options.cleanup);
                totalCount += count;
            }
            executorService.shutdown();
            executorService.awaitTermination(60, TimeUnit.SECONDS);
        } catch (final InterruptedException e) {
            if (logger.isDebugEnabled()) {
                logger.debug("Interrupted.", e);

        this.base = createTestDirectory();
    }


    @Override
    @After
    public void tearDown () throws Exception {
        if ( this.executor != null ) {
            this.executor.shutdown();
            if ( this.future != null ) {
                this.future.cancel(true);
            }
            this.executor.awaitTermination(1, TimeUnit.SECONDS);
        }
        if ( this.base != null ) {

                while ( !this.started ) {
                    this.startedLock.wait();
                }
            }
        }


        public void shutdown () {
            this.shutdown = true;
            synchronized ( this.shutdownLock ) {
                this.shutdownLock.notify();
            }
        }


        /**
         * {@inheritDoc}
         *

# Set to "infinity" if you use the 'bootstrap.mlockall: true' option
# in fess.yml and 'MAX_LOCKED_MEMORY=unlimited' in ${packaging.env.file}
#LimitMEMLOCK=infinity

# Shutdown delay in seconds, before process is tried to be killed with KILL (if configured)
TimeoutStopSec=20

[Install]
WantedBy=multi-user.target

            method.invoke(null, (Object[]) null);
        } catch (final ClassNotFoundException e) {
            // ignore
        } catch (final Exception e) {
            logger.warn("Could not shutdown Commons HttpClient.", e);
        }
    }

    @Override
    public void run () {
        try {
            this.closed = true;
            close();
        }
        catch ( CIFSException e ) {
            log.warn("Failed to close context on shutdown", e);
        }
    }

                                 * server will return "Access denied" even if a logoff is
                                 * sent. Unfortunately calling disconnect() doesn't always
                                 * actually shutdown the connection before other threads
                                 * have committed themselves (e.g. InterruptTest example).
                                 */

            return result;
        } catch (final Exception e) {
            throw new SsoLoginException("Failed to get a token.", e);
        } finally {
            if (service != null) {
                service.shutdown();
            }
        }
    }

    protected AuthenticationResult getAccessToken(final AuthorizationCode authorizationCode, final String currentUri) {

    }

    @Override
    public void commit() {
        try {
            if (logger.isDebugEnabled()) {
                logger.debug("Shutting down thread executor.");
            }
            executor.shutdown();
            executor.awaitTermination(executorTerminationTimeout, TimeUnit.SECONDS);
        } catch (final InterruptedException e) {
            if (logger.isDebugEnabled()) {