client/src/main/java/org/apache/hupa/client/activity/FolderListActivity.java

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 * distributed with this work for additional information        *
 * regarding copyright ownership.  The ASF licenses this file   *
 * to you under the Apache License, Version 2.0 (the            *
 * "License"); you may not use this file except in compliance   *
 * with the License.  You may obtain a copy of the License at   *
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 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY       *
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package org.apache.hupa.client.activity;

import org.apache.hupa.shared.events.RefreshFoldersEvent;
import org.apache.hupa.shared.events.RefreshFoldersEventHandler;

import com.google.gwt.event.shared.EventBus;
import com.google.gwt.user.client.Timer;
import com.google.gwt.user.client.ui.AcceptsOneWidget;
import com.google.gwt.user.client.ui.IsWidget;
import com.google.inject.Inject;

public class FolderListActivity extends AppBaseActivity {

    @Inject private Displayable display;

    @Override
    public void start(AcceptsOneWidget container, EventBus eventBus) {
        container.setWidget(display.asWidget());
        bindTo(eventBus);
    }

    private Timer refreshFoldersTimer = new Timer() {
        public void run() {
           eventBus.fireEvent(new RefreshFoldersEvent());
        }
    };

    private void bindTo(EventBus eventBus) {
        eventBus.addHandler(RefreshFoldersEvent.TYPE, new RefreshFoldersEventHandler() {
            @Override
            public void onRefreshEvent(RefreshFoldersEvent event) {
                display.refresh();
            }
        });
        refreshFoldersTimer.scheduleRepeating(3*60*1000);
    }

    @Override
    public void onStop() {
        super.onStop();
        refreshFoldersTimer.cancel();
    }

    public interface Displayable extends IsWidget {
        void refresh();
    }
}