com.mondospider.android.radar.SpiderSync.java Source code

Introduction

Here is the source code for com.mondospider.android.radar.SpiderSync.java

Source

/*
 * Copyright (C) 2010 The Mondospider Open Source Project
 *
 * Licensed 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
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.mondospider.android.radar;

import java.util.ArrayList;

import org.json.JSONObject;

import android.util.Log;

import com.mondospider.android.lib.LibHTTP;

/**
 * Use: s = new SpiderSync(APIURL) s.start();
 * 
 * call s.waitAfterCurrCall() to sleep in background call s.notifyresumeWork()
 * to reactivate it
 * 
 * Reqister with addSpiderListener(CLASS) all classes that should be notified
 * with updates. This classes must implement the interface SpiderListener();
 */
public class SpiderSync extends Daemon {
    private String spiderLocationApiUrl;
    private ArrayList<SpiderListener> listenerCollection = new ArrayList<SpiderListener>();

    public SpiderSync(String spiderLocationApiUrl) {
        super();

        Check.isNotNull(spiderLocationApiUrl);
        Check.isLongerThan3(spiderLocationApiUrl);

        this.spiderLocationApiUrl = spiderLocationApiUrl;
    }

    protected void theActualWork() {
        try {
            Log.d(TAG, "Send http req for spider update - Wait Time (nextSyncIn) was: " + nextSyncIn);
            String responseString = LibHTTP.get(spiderLocationApiUrl);

            /*
             * String responseString = "{" + "\"latitude\":35.728926," +
             * "\"longitude\":139.71038," +
             * "\"datemodified\":\"Thu Mar 25 06:59:21 UTC 2010\"," + "}";
             */

            JSONObject jsonObj = new JSONObject(responseString);

            final double latitude = jsonObj.getDouble("latitude");
            final double longitude = jsonObj.getDouble("longitude");
            final String status = jsonObj.getString("status");
            int nextSyncIn2 = jsonObj.getInt("next_update_in");
            nextSyncIn = nextSyncIn2;
            fireUpdate(latitude, longitude, status);

        } catch (Exception ex) {
            ex.printStackTrace();
            // make sure that it waits a bit after an error
            nextSyncIn = 60;
        }
    }

    void fireUpdate(double latitude, double longitude, String status) {
        for (SpiderListener listener : listenerCollection) {
            listener.onSpiderUpdate(latitude, longitude, status);
        }
    }

    void addSpiderListener(SpiderListener l) {
        listenerCollection.add(l);
    }

    interface SpiderListener {
        void onSpiderUpdate(double latitude, double longitude, String status);
    }
}