public void sync()

in qpid-jms-client/src/main/java/org/apache/qpid/jms/provider/ProgressiveProviderFuture.java [115:165]
46 lines of code
11 McCabe index (conditional complexity)

    public void sync() throws ProviderException {
        try {
            if (isComplete()) {
                failOnError();
                return;
            }

            int idleCount = 0;

            if (Thread.currentThread().isInterrupted()) {
                throw new InterruptedException();
            }

            while (true) {
                if (isComplete()) {
                    failOnError();
                    return;
                }

                if (idleCount < SPIN_COUNT) {
                    idleCount++;
                } else if (idleCount < YIELD_COUNT) {
                    Thread.yield();
                    idleCount++;
                } else if (idleCount < TINY_PARK_COUNT) {
                    LockSupport.parkNanos(TINY_PARK_NANOS);
                    idleCount++;
                } else if (idleCount < SMALL_PARK_COUNT) {
                    LockSupport.parkNanos(SMALL_PARK_NANOS);
                    idleCount++;
                } else {
                    synchronized (this) {
                        if (isComplete()) {
                            failOnError();
                            return;
                        }

                        waiting++;
                        try {
                            wait();
                        } finally {
                            waiting--;
                        }
                    }
                }
            }
        } catch (InterruptedException e) {
            Thread.interrupted();
            throw ProviderExceptionSupport.createOrPassthroughFatal(e);
        }
    }