/*
* DeviceServiceReachability
* Connect SDK
*
* Copyright (c) 2014 LG Electronics.
* Created by Jeffrey Glenn on 16 Apr 2014
*
* 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.connectsdk.etc.helper;
import java.io.IOException;
import java.net.InetAddress;
import java.net.UnknownHostException;
public class DeviceServiceReachability {
private static final int TIMEOUT = 10000;
private InetAddress ipAddress;
private Thread testThread;
private DeviceServiceReachabilityListener listener;
public DeviceServiceReachability() { }
public DeviceServiceReachability(InetAddress ipAddress) {
this.ipAddress = ipAddress;
}
public DeviceServiceReachability(InetAddress ipAddress, DeviceServiceReachabilityListener listener) {
this.ipAddress = ipAddress;
this.listener = listener;
}
public static DeviceServiceReachability getReachability(InetAddress ipAddress, DeviceServiceReachabilityListener listener) {
return new DeviceServiceReachability(ipAddress, listener);
}
public static DeviceServiceReachability getReachability(final String ipAddress, DeviceServiceReachabilityListener listener) {
InetAddress addr;
try {
addr = InetAddress.getByName(ipAddress);
} catch (UnknownHostException e) {
return null;
}
return getReachability(addr, listener);
}
public InetAddress getIpAddress() {
return ipAddress;
}
public void setIpAddress(InetAddress ipAddress) {
this.ipAddress = ipAddress;
}
public boolean isRunning() {
return testThread != null && testThread.isAlive();
}
public DeviceServiceReachabilityListener getListener() {
return listener;
}
public void setListener(DeviceServiceReachabilityListener listener) {
this.listener = listener;
}
public void start() {
if (isRunning())
return;
testThread = new Thread(testReachability);
testThread.start();
}
public void stop() {
if (!isRunning())
return;
testThread.interrupt();
testThread = null;
}
private void unreachable() {
stop();
if (listener != null)
listener.onLoseReachability(this);
}
private Runnable testReachability = new Runnable() {
@Override
public void run() {
try {
while (true) {
if (!ipAddress.isReachable(TIMEOUT))
unreachable();
Thread.sleep(TIMEOUT);
}
} catch (IOException e) {
unreachable();
} catch (InterruptedException e) { }
}
};
public interface DeviceServiceReachabilityListener {
public void onLoseReachability(DeviceServiceReachability reachability);
}
}