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/*
* Copyright (C) 2012-2015 Tobias Brunner
* Hochschule fuer Technik Rapperswil
*
* 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 2 of the License, or (at your
* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
*
* 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.
*/
package org.strongswan.android.logic;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import java.util.LinkedList;
public class NetworkManager extends BroadcastReceiver implements Runnable
{
private final Context mContext;
private volatile boolean mRegistered;
private Thread mEventNotifier;
private LinkedList<Boolean> mEvents = new LinkedList<>();
public NetworkManager(Context context)
{
mContext = context;
}
public void Register()
{
mEvents.clear();
mRegistered = true;
mEventNotifier = new Thread(this);
mEventNotifier.start();
mContext.registerReceiver(this, new IntentFilter(ConnectivityManager.CONNECTIVITY_ACTION));
}
public void Unregister()
{
mContext.unregisterReceiver(this);
mRegistered = false;
synchronized (this)
{
notifyAll();
}
try
{
mEventNotifier.join();
mEventNotifier = null;
}
catch (InterruptedException e)
{
e.printStackTrace();
}
}
public boolean isConnected()
{
ConnectivityManager cm = (ConnectivityManager)mContext.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo info = null;
if (cm != null)
{
info = cm.getActiveNetworkInfo();
}
return info != null && info.isConnected();
}
@Override
public void onReceive(Context context, Intent intent)
{
synchronized (this)
{
mEvents.addLast(isConnected());
notifyAll();
}
}
@Override
public void run()
{
while (mRegistered)
{
boolean connected;
synchronized (this)
{
try
{
while (mRegistered && mEvents.isEmpty())
{
wait();
}
}
catch (InterruptedException ex)
{
break;
}
if (!mRegistered)
{
break;
}
connected = mEvents.removeFirst();
}
/* call the native parts without holding the lock */
networkChanged(!connected);
}
}
/**
* Notify the native parts about a network change
*
* @param disconnected true if no connection is available at the moment
*/
public native void networkChanged(boolean disconnected);
}
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