public Server choose()

in src/frontend/src/main/java/com/alibabacloud/hipstershop/common/MyRule.java [29:80]
33 lines of code
7 McCabe index (conditional complexity)

    public Server choose(ILoadBalancer lb, Object key) {
        if (lb == null) {
            return null;
        }
        Server server = null;

        int count = 1;

        while (server == null) {
            if (Thread.interrupted()) {
                return null;
            }
            List<Server> upList = lb.getReachableServers();
            LOGGER.info("第 " + count + " 次 upList: " + upList);
            List<Server> allList = lb.getAllServers();
            LOGGER.info("第 " + count + " 次 allList: " + allList);
            count++;

            int serverCount = allList.size();
            if (serverCount == 0) {
                /*
                 * No servers. End regardless of pass, because subsequent passes
                 * only get more restrictive.
                 */
                return null;
            }

            int index = rand.nextInt(serverCount);
            server = upList.get(index);

            if (server == null) {
                /*
                 * The only time this should happen is if the server list were
                 * somehow trimmed. This is a transient condition. Retry after
                 * yielding.
                 */
                Thread.yield();
                continue;
            }

            if (server.isAlive()) {
                return (server);
            }

            // Shouldn't actually happen.. but must be transient or a bug.
            server = null;
            Thread.yield();
        }

        return server;

    }