UnitTestTestingConcurrency.java

    @Test
    public void misc() {
        final SimpleDocumentBuilderHolder documentBuilderHolder = new SimpleDocumentBuilderHolder();

        ExecutorService exec = Executors.newFixedThreadPool(10);
        for (int i = 0; i < ROUNDS; i++) {
            exec.submit(new Runnable() {
                public void run() {
                    try {
                        final DocumentBuilder builder = documentBuilderHolder.allocateDocumentBuilder();
//                        synchronized (builder) {
                            try {
                                System.out.print("hehe");
                                builder.parse(samlWheelOfFortune());
                            } catch (final Throwable t) {
                                throw new AssertionHandlerException("Error parsing assertion", t);
                            } finally {
                                documentBuilderHolder.releaseDocumentBuilder(builder);
                            }
//                        }
                    } catch (Exception e) {
                        e.printStackTrace();
                    }
                }
            });
        }
        exec.shutdown();
        while (!executor.isTerminated()) {
            //waiting for termination to complete
        }
    }