UDP server respawn after timeout
I'm writing an Android application (API 24) that should receive telemetry messages trough an UDP connection. It works fine if the (wireless) connection is in good state, as long as it degrades the UDP receiver stops working and I'm not able to respawn even when the connection it's again in good state.
This's my code:
private class UDPReceiver extends Thread {
private boolean keepRunning = true;
private int UDP_SERVER_PORT;
public Queue<String> messagesQueue = new LinkedList<>();
public void run() {
byte buffer = new byte[MAX_UDP_DATAGRAM_LEN];
DatagramPacket packet = new DatagramPacket(buffer, buffer.length);
DatagramSocket socket = null;
do {
try {
socket = new DatagramSocket(UDP_SERVER_PORT);
socket.setReuseAddress(true);
while (keepRunning) {
socket.receive(packet);
messagesQueue.add(new String(buffer, 0, packet.getLength()));
runOnUiThread(updateTelemetry);
}
} catch (Throwable e) {
Log.e(this.getClass().getName(), e.getMessage());
e.printStackTrace();
}
try {
Thread.sleep(UDP_SERVER_RESPAWN);
} catch (InterruptedException e) {
e.printStackTrace();
}
} while (keepRunning);
if (socket != null) {
socket.close();
}
}
private Runnable updateTelemetry = new Runnable() {
public void run() {
if (gcsUDPReceiver == null) return;
final String message = gcsUDPReceiver.messagesQueue.poll();
if (message == null) return;
telemetryTask(message);
}
};
I thought that the outer do...while loop in UDPReceiver should fix the problem respawning the dead connection but this's not working as I expected, moreover setReuseAddress(true) directive seems to be a source of issues instead a partial fix.
I'm probably doing some other error but I'm not able to catch it.
android udp
asked Nov 14 '18 at 9:59
weirdgyn
279326
add a comment |
I'm writing an Android application (API 24) that should receive telemetry messages trough an UDP connection. It works fine if the (wireless) connection is in good state, as long as it degrades the UDP receiver stops working and I'm not able to respawn even when the connection it's again in good state.
This's my code:
private class UDPReceiver extends Thread {
private boolean keepRunning = true;
private int UDP_SERVER_PORT;
public Queue<String> messagesQueue = new LinkedList<>();
public void run() {
byte buffer = new byte[MAX_UDP_DATAGRAM_LEN];
DatagramPacket packet = new DatagramPacket(buffer, buffer.length);
DatagramSocket socket = null;
do {
try {
socket = new DatagramSocket(UDP_SERVER_PORT);
socket.setReuseAddress(true);
while (keepRunning) {
socket.receive(packet);
messagesQueue.add(new String(buffer, 0, packet.getLength()));
runOnUiThread(updateTelemetry);
}
} catch (Throwable e) {
Log.e(this.getClass().getName(), e.getMessage());
e.printStackTrace();
}
try {
Thread.sleep(UDP_SERVER_RESPAWN);
} catch (InterruptedException e) {
e.printStackTrace();
}
} while (keepRunning);
if (socket != null) {
socket.close();
}
}
private Runnable updateTelemetry = new Runnable() {
public void run() {
if (gcsUDPReceiver == null) return;
final String message = gcsUDPReceiver.messagesQueue.poll();
if (message == null) return;
telemetryTask(message);
}
};
I thought that the outer do...while loop in UDPReceiver should fix the problem respawning the dead connection but this's not working as I expected, moreover setReuseAddress(true) directive seems to be a source of issues instead a partial fix.
I'm probably doing some other error but I'm not able to catch it.
android udp
asked Nov 14 '18 at 9:59
weirdgyn
279326
add a comment |
I'm writing an Android application (API 24) that should receive telemetry messages trough an UDP connection. It works fine if the (wireless) connection is in good state, as long as it degrades the UDP receiver stops working and I'm not able to respawn even when the connection it's again in good state.
This's my code:
private class UDPReceiver extends Thread {
private boolean keepRunning = true;
private int UDP_SERVER_PORT;
public Queue<String> messagesQueue = new LinkedList<>();
public void run() {
byte buffer = new byte[MAX_UDP_DATAGRAM_LEN];
DatagramPacket packet = new DatagramPacket(buffer, buffer.length);
DatagramSocket socket = null;
do {
try {
socket = new DatagramSocket(UDP_SERVER_PORT);
socket.setReuseAddress(true);
while (keepRunning) {
socket.receive(packet);
messagesQueue.add(new String(buffer, 0, packet.getLength()));
runOnUiThread(updateTelemetry);
}
} catch (Throwable e) {
Log.e(this.getClass().getName(), e.getMessage());
e.printStackTrace();
}
try {
Thread.sleep(UDP_SERVER_RESPAWN);
} catch (InterruptedException e) {
e.printStackTrace();
}
} while (keepRunning);
if (socket != null) {
socket.close();
}
}
private Runnable updateTelemetry = new Runnable() {
public void run() {
if (gcsUDPReceiver == null) return;
final String message = gcsUDPReceiver.messagesQueue.poll();
if (message == null) return;
telemetryTask(message);
}
};
I thought that the outer do...while loop in UDPReceiver should fix the problem respawning the dead connection but this's not working as I expected, moreover setReuseAddress(true) directive seems to be a source of issues instead a partial fix.
I'm probably doing some other error but I'm not able to catch it.
android udp
asked Nov 14 '18 at 9:59
weirdgyn
279326
I'm writing an Android application (API 24) that should receive telemetry messages trough an UDP connection. It works fine if the (wireless) connection is in good state, as long as it degrades the UDP receiver stops working and I'm not able to respawn even when the connection it's again in good state.
This's my code:
private class UDPReceiver extends Thread {
private boolean keepRunning = true;
private int UDP_SERVER_PORT;
public Queue<String> messagesQueue = new LinkedList<>();
public void run() {
byte buffer = new byte[MAX_UDP_DATAGRAM_LEN];
DatagramPacket packet = new DatagramPacket(buffer, buffer.length);
DatagramSocket socket = null;
do {
try {
socket = new DatagramSocket(UDP_SERVER_PORT);
socket.setReuseAddress(true);
while (keepRunning) {
socket.receive(packet);
messagesQueue.add(new String(buffer, 0, packet.getLength()));
runOnUiThread(updateTelemetry);
}
} catch (Throwable e) {
Log.e(this.getClass().getName(), e.getMessage());
e.printStackTrace();
}
try {
Thread.sleep(UDP_SERVER_RESPAWN);
} catch (InterruptedException e) {
e.printStackTrace();
}
} while (keepRunning);
if (socket != null) {
socket.close();
}
}
private Runnable updateTelemetry = new Runnable() {
public void run() {
if (gcsUDPReceiver == null) return;
final String message = gcsUDPReceiver.messagesQueue.poll();
if (message == null) return;
telemetryTask(message);
}
};
I thought that the outer do...while loop in UDPReceiver should fix the problem respawning the dead connection but this's not working as I expected, moreover setReuseAddress(true) directive seems to be a source of issues instead a partial fix.
I'm probably doing some other error but I'm not able to catch it.
android udp
android udp
asked Nov 14 '18 at 9:59
weirdgyn
279326
asked Nov 14 '18 at 9:59
weirdgyn
279326
edited Nov 15 '18 at 7:23
asked Nov 14 '18 at 9:59
weirdgyn
279326
asked Nov 14 '18 at 9:59
weirdgyn
279326
asked Nov 14 '18 at 9:59
weirdgyn
279326
279326
add a comment |
add a comment |
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