PipePeriodicLoader.java

/*
 Swisscom Safe Connect
 Copyright (C) 2014 Swisscom

 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
 the Free Software Foundation, either version 3 of the License, or
 (at your option) any later version.

 This program is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU General Public License for more details.

 You should have received a copy of the GNU General Public License
 along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/
package com.swisscom.safeconnect.loader;

import android.content.Context;
import android.support.v4.content.AsyncTaskLoader;

import com.swisscom.safeconnect.backend.BackendConnector;

import java.util.Timer;
import java.util.TimerTask;

/**
 * Created by cianci on 6/16/14.
 */
public abstract class PipePeriodicLoader<T> extends AsyncTaskLoader<T> {
    protected T mData;
    protected BackendConnector backendConnector = new BackendConnector(getContext());

    protected Timer mTimer;
    protected int timerInterval;

    public PipePeriodicLoader(Context context) {
        super(context);
    }

    /**
     * Called when there is new data to deliver to the client.  The
     * super class will take care of delivering it; the implementation
     * here just adds a little more logic.
     */
    @Override
    public void deliverResult(T result) {
        if (isStarted()) {
            // If the Loader is currently started, we can immediately
            // deliver its results.
            super.deliverResult(result);
        }
    }

    /**
     * Handles a request to start the Loader.
     */
    @Override
    protected void onStartLoading() {
        // Start watching for changes in the app data.
        mTimer = new Timer();
        mTimer.schedule(new TimerTask() {

            @Override
            public void run() {
                onContentChanged();
            }
        }, timerInterval, timerInterval);

        //we want to display new statistics, when the user reloads the window
        forceLoad();
    }

    /**
     * Handles a request to stop the Loader.
     */
    @Override
    protected void onStopLoading() {
        // Attempt to cancel the current load task if possible.
        cancelLoad();

        if (mTimer != null) mTimer.cancel();
    }

    /**
     * Handles a request to completely reset the Loader.
     */
    @Override
    protected void onReset() {
        super.onReset();

        // Ensure the loader is stopped
        onStopLoading();

        if (mData != null) {
            mData = null;
        }

        // Stop monitoring for changes.
        if (mTimer != null) {
            mTimer.cancel();
            mTimer = null;
        }
    }
}