add FileCacheQueueScheduler support for cycleRetryTimes

webmagic-extension/src/main/java/us/codecraft/webmagic/scheduler/FileCacheQueueScheduler.java

@@ -23,7 +23,7 @@ import java.util.concurrent.atomic.AtomicInteger;
  * @author code4crafter@gmail.com <br>
  * @since 0.2.0
  */
-public class FileCacheQueueScheduler implements Scheduler {
+public class FileCacheQueueScheduler extends LocalDuplicatedRemovedScheduler {
 
     private Logger logger = LoggerFactory.getLogger(getClass());
 
@@ -145,18 +145,14 @@ public class FileCacheQueueScheduler implements Scheduler {
     }
 
     @Override
-    public synchronized void push(Request request, Task task) {
+    protected void pushWhenNoDuplicate(Request request, Task task) {
         if (!inited.get()) {
             init(task);
         }
-        logger.debug("push to queue {}" , request.getUrl());
-        if (urls.add(request.getUrl())) {
         queue.add(request);
         fileUrlWriter.println(request.getUrl());
     }
 
-    }
-
     @Override
     public synchronized Request poll(Task task) {
         if (!inited.get()) {