broadcast

问题 When using Dataframe broadcast function or the SparkContext broadcast functions, what is the maximum object size that can be dispatched to all executors? 回答1: broadcast function : Default is 10mb but we have used till 300 mb which is controlled by spark.sql.autoBroadcastJoinThreshold. AFAIK, It all depends on memory available. so there is no definite answer for this. what I would say is, it should be less than large dataframe and you can estimate large or small dataframe size like below...

问题 I am trying to catch the package replaced broadcast for my app and only my app, but for some reason in my reciever I am the broadcast for every app that is updated. I thought you only needed to set the intent filter in the manifest file to your app, but maybe I am wrong? Here's my code(manifest): <receiver android:name=".UpdateReciever"> <intent-filter> <action android:name="android.intent.action.PACKAGE_REPLACED" /> <data android:scheme="package" android:path="com.my.app" /> </intent-filter>

问题 For example: IP Address: 130.45.34.36 Mask: 255.255.240.0 What would be Net ID/Subnet Address, and Broadcast Address? 回答1: Let's write both in binary: 130.45.34.36 = 10000010.00101101.00100010.00100100 255.255.240.0 = 11111111.11111111.11110000.00000000 A bitwise AND between the two would give us the network address: 10000010.00101101.00100010.00100100 (ip address) AND 11111111.11111111.11110000.00000000 (subnet mask) = 10000010.00101101.00100000.00000000 = 130.45.32.0 (the resulting network

问题 The following code sends a packet on port 15000: int port = 15000; UdpClient udp = new UdpClient(); //udp.EnableBroadcast = true; //This was suggested in a now deleted answer IPEndPoint groupEP = new IPEndPoint(IPAddress.Broadcast, port); string str4 = "I want to receive this!"; byte[] sendBytes4 = Encoding.ASCII.GetBytes(str4); udp.Send(sendBytes4, sendBytes4.Length, groupEP); udp.Close(); However, it's kind of useless if I can't then receive it on another computer. All I need is to send a

问题 Using Lookout app (https://play.google.com/store/apps/details?id=com.lookout), I see every time I install or upgrade app, it'll automatically scan this app to ensure it's not malicious. Follow Lookout, I write a simple app which listen broadcast message whenever each app is installed or upgraded. AFAIK, there are some type of IntentFilter for broadcast message, it is: Intent.ACTION_PACKAGE_ADDED Intent.ACTION_PACKAGE_CHANGED Intent.ACTION_PACKAGE_INSTALL I hope Intent.ACTION_PACKAGE_ADDED is

问题 We have existing software that periodically broadcasts UDP packets to a specific port (7125) on the local subnet (x.x.x.255). We have monitoring software running on HP-UX (11.11) that is able to receive these packets no problem. However, after porting the monitoring software to Linux (RHEL 6.1) we have found that it does not receive the broadcast packets. tcpdump shows the packets arriving at the Linux host, but the kernel does not send them through to our software. I've been using a couple

问题 I want to install an apk file and set a broadcast-receiver in order to catch information concerning install status. I have prepared a BroadcastReceiver class : public class newPackageReceiver extends BroadcastReceiver { @Override public void onReceive(Context context, Intent intent) { Log.d("DEBUG"," test for application install/uninstall"); } } In the main activity, I first register a new receiver object, then instanciate button for application install. public void onCreate(Bundle

问题 I am developing a network monitor app that runs in background as a service. Is it possible to get a notification/call when the screen is turned on or off? It exists in Android by using the following code: private void registerScreenOnOffReceiver() { IntentFilter filter = new IntentFilter(Intent.ACTION_SCREEN_ON); filter.addAction(Intent.ACTION_SCREEN_OFF); registerReceiver(screenOnOffReceiver, filter); } screenOnOffReceiver is then called when screen is turned on/off. Is there a similar

问题 I am developing a network monitor app that runs in background as a service. Is it possible to get a notification/call when the screen is turned on or off? It exists in Android by using the following code: private void registerScreenOnOffReceiver() { IntentFilter filter = new IntentFilter(Intent.ACTION_SCREEN_ON); filter.addAction(Intent.ACTION_SCREEN_OFF); registerReceiver(screenOnOffReceiver, filter); } screenOnOffReceiver is then called when screen is turned on/off. Is there a similar

问题 I have App A and App B. In App A I want to send broadcast to App B. This is the code for App A: final Intent intent = new Intent(); intent.setAction("com.pkg.perform.Ruby"); intent.putExtra("KeyName", "code1id"); intent.setComponent(new ComponentName("com.pkg.AppB", "com.pkg.AppB.MainActivity")); sendBroadcast(intent); And in App B - In MainActivity , I have MyBroadCastReceiver Class. public class MainActivity extends Activity { private MyBroadcastReceiver MyReceiver; @Override protected void