fix AutoDownGradeByOverTime

@@ -13,29 +13,29 @@ import com.yoho.search.service.downgrade.IDowngrade;
  * @author hugufei
  */
 public class AutoDownGradeByOverTime implements IDowngrade {
-	
-	private ScheduledExecutorService scheduledExecutorService = Executors.newSingleThreadScheduledExecutor();
+
+	private ScheduledExecutorService scheduledExecutorService;
 	private AtomicInteger overTimeCount = new AtomicInteger(0);// 当前超时次数
 	private int overTimeThreshold;// 超时次数阀值
-	
-	private int lastPeroidOverTime = 0;//上一个时间段的超时次数
+	private int lastPeroidOverTime = 0;// 上一个时间段的超时次数
 
-	public AutoDownGradeByOverTime(int periodInSecond,TimeUnit timeUnit,int overTimeThreshold) {
+	public AutoDownGradeByOverTime(int periodInSecond, TimeUnit timeUnit, int overTimeThreshold) {
 		this.overTimeThreshold = overTimeThreshold;
+		scheduledExecutorService = Executors.newSingleThreadScheduledExecutor();
 		scheduledExecutorService.scheduleAtFixedRate(new ClearOverTimeCount(), 1, periodInSecond, timeUnit);
 	}
-	
+
 	@Override
 	public boolean needDowngrade() {
 		int overTime = Math.max(lastPeroidOverTime, overTimeCount.intValue());
-		return overTime> overTimeThreshold;
+		return overTime > overTimeThreshold;
 	}
-	
+
 	@Override
 	public void tryDowngrade() {
 		overTimeCount.incrementAndGet();
 	}
-	
+
 	class ClearOverTimeCount implements Runnable {
 		@Override
 		public void run() {