/**
 * Created by kl on 2017/3/20.
 * Content :銷售操作日志隊列
 */
public class SalesLogQueue{
    //隊列大小
    public static final int QUEUE_MAX_SIZE    = 1000;
    private static SalesLogQueue alarmMessageQueue = new SalesLogQueue();
    //阻塞隊列
    private BlockingQueueblockingQueue = new LinkedBlockingQueue<>(QUEUE_MAX_SIZE);
    private SalesLogQueue(){}
    public static SalesLogQueue getInstance() {
        return alarmMessageQueue;
    }
    /**
     * 消息入隊
     * @param salesLog
     * @return
     */
    public boolean push(SalesLog salesLog) {
        return this.blockingQueue.add(salesLog);//隊列滿了就拋出異常，不阻塞
    }
    /**
     * 消息出隊
     * @return
     */
    public SalesLog poll() {
        SalesLog result = null;
        try {
            result = this.blockingQueue.take();
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        return result;
    }
    /**
     * 獲取隊列大小
     * @return
     */
    public int size() {
        return this.blockingQueue.size();
    }
}

/**
 * Created by kl on 2017/3/20.
 * Content :訪問請求攔截，保存操作日志
 */
public class SalesLogFilter implements Filter {
    private RoleResourceService resourceService;
    @Override
    public void init(FilterConfig filterConfig) throws ServletException {
        ServletContext context = filterConfig.getServletContext();
        ApplicationContext ctx = WebApplicationContextUtils.getWebApplicationContext(context);
        resourceService = ctx.getBean(RoleResourceService.class);
    }
    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        try {
            HttpServletRequest request = (HttpServletRequest) servletRequest;
            String requestUrl = request.getRequestURI();
            String requestType=request.getMethod();
            String ipAddress = HttpClientUtil.getIpAddr(request);
            Map resource=resourceService.getResource();
            String context=resource.get(requestUrl);
            //動態(tài)url正則匹配
            if(StringUtil.isNull(context)){
                for(Map.Entry entry:resource.entrySet()){
                    String resourceUrl= entry.getKey();
                    if(requestUrl.matches(resourceUrl)){
                        context=entry.getValue();
                        break;
                    }
                }
            }
            SalesLog log=new SalesLog();
            log.setCreateDate(new Timestamp(System.currentTimeMillis()));
            log.setContext(context);
            log.setOperateUser(UserTokenUtil.currentUser.get().get("realname"));
            log.setRequestIp(ipAddress);
            log.setRequestUrl(requestUrl);
            log.setRequestType(requestType);
            SalesLogQueue.getInstance().push(log);
        }catch (Exception e){
            e.printStackTrace();
        }
        filterChain.doFilter(servletRequest, servletResponse);
    }
    @Override
    public void destroy() {
    }
}

/**
 * Created by kl on 2017/3/20.
 * Content :啟動消費操作日志隊列的線程
 */
@Component
public class ConsumeSalesLogQueue {
    @Autowired
    SalesLogService salesLogService;
    @PostConstruct
    public void startrtThread() {
        ExecutorService e = Executors.newFixedThreadPool(2);//兩個大小的固定線程池
        e.submit(new PollSalesLog(salesLogService));
        e.submit(new PollSalesLog(salesLogService));
    }
    class PollSalesLog implements Runnable {
        SalesLogService salesLogService;
        public PollSalesLog(SalesLogService salesLogService) {
            this.salesLogService = salesLogService;
        }
        @Override
        public void run() {
            while (true) {
                try {
                    SalesLog salesLog = SalesLogQueue.getInstance().poll();
                    if(salesLog!=null){
                        salesLogService.saveSalesLog(salesLog);
                    }
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        }
    }
}