private void doPing(SingletonEndpoint destination) {
// create a new bundle
Bundle b = new Bundle();
// set the destination of the bundle
b.setDestination(destination);
// limit the lifetime of the bundle to 60 seconds
b.setLifetime(60L);
// set status report requests for bundle reception
b.set(ProcFlags.REQUEST_REPORT_OF_BUNDLE_RECEPTION, true);
// set destination for status reports
b.setReportto(SingletonEndpoint.ME);
// generate some payload
String payload = "Hello World";
try {
// store the current time
mStart = System.nanoTime();
// send the bundle
BundleID ret = mSession.send(b, payload.getBytes());
if (ret == null) {
Log.e(TAG, "could not send the message");
} else {
Log.d(TAG, "Bundle sent, BundleID: " + ret.toString());
}
} catch (SessionDestroyedException e) {
Log.e(TAG, "could not send the message", e);
}
}
@Override
public void onDestroy() {
if (mDestroySessionOnExit) mSession.destroy();
if (mStreamJob != null) {
mStreamJob.cancel(false);
mStreamJob = null;
try {
mTransmitter.close();
} catch (InterruptedException e) {
Log.d(TAG, "interrupted while closing", e);
} catch (IOException e) {
Log.d(TAG, "error while closing", e);
}
}
// shutdown executor
mExecutor.shutdown();
super.onDestroy();
}
@Override
protected void onHandleIntent(Intent intent) {
String action = intent.getAction();
if (de.tubs.ibr.dtn.Intent.RECEIVE.equals(action)) {
// Received bundles from the DTN service here
try {
// We loop here until no more bundles are available
// (queryNext() returns false)
while (mSession.queryNext()) ;
} catch (SessionDestroyedException e) {
Log.e(TAG, "Can not query for bundle", e);
}
} else if (MARK_DELIVERED_INTENT.equals(action)) {
// retrieve the bundle ID of the intent
BundleID bundleid = intent.getParcelableExtra("bundleid");
try {
// mark the bundle ID as delivered
mSession.delivered(bundleid);
} catch (Exception e) {
Log.e(TAG, "Can not mark bundle as delivered.", e);
}
} else if (REPORT_DELIVERED_INTENT.equals(action)) {
// retrieve the source of the status report
SingletonEndpoint source = intent.getParcelableExtra("source");
// retrieve the bundle ID of the intent
BundleID bundleid = intent.getParcelableExtra("bundleid");
Log.d(
TAG, "Status report received for " + bundleid.toString() + " from " + source.toString());
} else if (PING_INTENT.equals(action)) {
// retrieve the ping destination
SingletonEndpoint destination = new SingletonEndpoint(intent.getStringExtra("destination"));
// send out the ping
doPing(destination);
} else if (STREAM_START_INTENT.equals(action)) {
Log.d(TAG, "create stream");
// create DTN stream
mTransmitter = new DtnStreamTransmitter(PingService.this, mSession);
mTransmitter.connect(mStreamGroup, MediaType.BINARY, null);
mTransmitter.setLifetime(10);
mStreamJob =
mExecutor.scheduleWithFixedDelay(
new Runnable() {
@Override
public void run() {
Log.d(TAG, "send stream packet");
try {
mTransmitter.write("Hello World!".getBytes());
} catch (InterruptedException e) {
Log.d(TAG, "interrupted while sending", e);
} catch (IOException e) {
Log.d(TAG, "error while sending", e);
}
}
},
0,
1,
TimeUnit.SECONDS);
} else if (STREAM_STOP_INTENT.equals(action)) {
if (mStreamJob != null) {
mStreamJob.cancel(false);
mStreamJob = null;
try {
mTransmitter.close();
} catch (InterruptedException e) {
Log.d(TAG, "interrupted while closing", e);
} catch (IOException e) {
Log.d(TAG, "error while closing", e);
}
}
} else if (STREAM_SWITCH_GROUP.equals(action)) {
try {
mSession.leave(mStreamGroup);
if (STREAM_GROUP2_EID.equals(mStreamGroup)) {
// set current stream group
mStreamGroup = STREAM_GROUP1_EID;
} else {
// set current stream group
mStreamGroup = STREAM_GROUP2_EID;
}
mSession.join(mStreamGroup);
} catch (SessionDestroyedException e) {
Log.e(TAG, "session destroyed", e);
}
} else if (UNREGISTER.equals(action)) {
mDestroySessionOnExit = true;
}
}