Halo Dalam
publikasi sebelumnya, metode untuk menerima alarm aktif melalui AlarmIRP dipertimbangkan. Selanjutnya, kita akan melihat cara menerima alarm saat mereka terjadi menggunakan NotificationIRP. Dalam contoh ini, kita akan menggunakan NetAct Nokia.
Dibandingkan dengan AlarmIRP, antarmuka yang dipertimbangkan dalam artikel ini akan mengharuskan kami, selain membuat klien CORBA, juga membuat "server CORBA" yang akan memproses pesan dari NotificationIRP. "Server" ini, antara lain, harus menerapkan metode
push_structured_events yang OSS akan mengirimkan peristiwa dalam bentuk
StructuredEvent [] . Untuk melakukan ini, kita perlu kelas berikut:
private class IRPManager extends org.omg.CosNotifyComm.SequencePushConsumerPOA{ @Override public void push_structured_events(StructuredEvent[] notifications) throws org.omg.CosEventComm.Disconnected { for (StructuredEvent alarm: notifications) { alarmPrint(alarm); } } @Override public void offer_change(EventType[] arg0, EventType[] arg1) throws org.omg.CosNotifyComm.InvalidEventType { System.out.println("Offer Change!"); } @Override public void disconnect_sequence_push_consumer() { System.out.println("Disconnected!"); } }
Metode alarmPrint mirip dengan nama yang sama dari artikel sebelumnya. Pada akhirnya, kode lengkap dari seluruh proyek akan dilampirkan.
Sekarang Anda perlu "membungkus" kelas ini dengan fungsi server ORB, dapatkan NotificationIRP dan berikan tautan ke objek yang diterima.
_irpMan = new IRPManager(); _notificationOrb = ORB.init(new String[0], null); org.omg.CORBA.ORB orb = ORB.init(new String[0], null); org.omg.CORBA.Object rootObj = orb.string_to_object(readIOR()); _notifIrp = com.nsn.oss.nbi.internal.corba.NotificationIRPSystem.NotificationIRPHelper.narrow(rootObj); POA poa; poa = POAHelper.narrow(_notificationOrb.resolve_initial_references("RootPOA")); poa.the_POAManager().activate(); _notifySrvr = poa.servant_to_reference(_irpMan); _notifyServer = _notificationOrb.object_to_string(_notifySrvr);
Untuk menjalankan ORB, kami akan menggunakan subproses:
private class notificationThread extends Thread { public void run() { _notificationOrb.run(); } }
OSS akan berhenti mengirimi kami pemberitahuan setelah batas
waktu berakhir , atau sampai kami
menolaknya dengan memanggil metode
detach . Jika kita perlu menerima pesan setelah penghitung waktu kedaluwarsa, kita perlu melaporkan ini ke sistem menggunakan metode
get_subscription_status . Ketika dipanggil, timer akan memulai hitungan mundur lagi.
Tetap mengumpulkan semuanya bersama, menemukan pustaka yang diperlukan di NetAct dan terhubung ke mesin virtual di mana server
nbi3gc berjalan (karena IOR dalam contoh ini kita membaca dari file). Untuk menjalankan contoh yang diajukan, kami akan menggunakan perintah:
java -cp .: jacorb-3.1.jar: jacorb-services-3.1.jar: nbi3gc-internal-corba-interface-17.8.0.158.jar AlarmClient
Di bawah spoiler, kode contoh lengkap import java.io.BufferedReader; import java.io.File; import java.io.FileReader; import java.io.IOException; import java.text.DateFormat; import java.text.SimpleDateFormat; import java.util.Date; import org.omg.CORBA.IntHolder; import org.omg.CORBA.ORB; import org.omg.CORBA.ORBPackage.InvalidName; import org.omg.CosNotification.EventType; import org.omg.CosNotification.Property; import org.omg.CosNotification.StructuredEvent; import org.omg.PortableServer.POA; import org.omg.PortableServer.POAHelper; import org.omg.PortableServer.POAManagerPackage.AdapterInactive; import org.omg.PortableServer.POAPackage.ServantNotActive; import org.omg.PortableServer.POAPackage.WrongPolicy; import org.omg.TimeBase.UtcT; import org.omg.TimeBase.UtcTHelper; import com.nsn.oss.nbi.internal.corba.ManagedGenericIRPConstDefs.StringTypeOpt; import com.nsn.oss.nbi.internal.corba.ManagedGenericIRPConstDefs.StringTypeOptHolder; import com.nsn.oss.nbi.internal.corba.ManagedGenericIRPSystem.InvalidParameter; import com.nsn.oss.nbi.internal.corba.ManagedGenericIRPSystem.OperationNotSupported; import com.nsn.oss.nbi.internal.corba.ManagedGenericIRPSystem.ParameterNotSupported; import com.nsn.oss.nbi.internal.corba.NotificationIRPConstDefs.NotificationTypesSetHolder; import com.nsn.oss.nbi.internal.corba.NotificationIRPSystem.GetNotificationCategories; public class AlarmClient { private com.nsn.oss.nbi.internal.corba.NotificationIRPSystem.NotificationIRP _notifIrp = null; public String alarmFilter =""; private final long UNIX_OFFSET = 122192928000000000L; public String delimiter = ";"; private org.omg.CORBA.ORB _notificationOrb = null; private String _notifyServer = null; private org.omg.CORBA.Object _notifySrvr = null; private String _attId = ""; private IRPManager _irpMan = null; public int timetick = 15; public static void main(String[] args) { AlarmClient ac = new AlarmClient(); ac.startNotifications(); try { Thread.sleep(20000); } catch (InterruptedException e) { e.printStackTrace(); } ac.stopNotifications(); } private String readIOR(String iorType) { File f = new File("/d/oss/global/var/NSN-nbi3gc/ior/NotificationIRP.ior"); BufferedReader br; String iorContents = null; try { br = new BufferedReader(new FileReader(f)); iorContents = br.readLine(); br.close(); } catch (IOException e) { e.printStackTrace(); } return iorContents; } private void alarmPrint(StructuredEvent alarm){ String result = ""; UtcT timeValue = null; Date dt; DateFormat df; if (alarm.filterable_data != null) { for (Property filterableData: alarm.filterable_data) { String fieldName = filterableData.name; switch (fieldName){ case "b": timeValue = UtcTHelper.extract(filterableData.value); dt = new Date((timeValue.time - UNIX_OFFSET) / 10000); df = new SimpleDateFormat("dd-MM-yyyy HH:mm:ss"); result = result + df.format(dt) + delimiter; break; case "e": result = result + filterableData.value.extract_string() + delimiter; break; case "i": result = result + filterableData.value.extract_string() + delimiter; break; } } } System.out.println(result); } public void startNotifications(){ _irpMan = new IRPManager(); _notificationOrb = ORB.init(new String[0], null); org.omg.CORBA.ORB orb = ORB.init(new String[0], null); org.omg.CORBA.Object rootObj = orb.string_to_object(readIOR("NotificationIRP")); _notifIrp = com.nsn.oss.nbi.internal.corba.NotificationIRPSystem.NotificationIRPHelper.narrow(rootObj); POA poa; try { poa = POAHelper.narrow(_notificationOrb.resolve_initial_references("RootPOA")); poa.the_POAManager().activate(); _notifySrvr = poa.servant_to_reference(_irpMan); _notifyServer = _notificationOrb.object_to_string(_notifySrvr); String[] aCat = _notifIrp.get_notification_categories(new NotificationTypesSetHolder()); StringTypeOpt alarmFltr = new StringTypeOpt(); alarmFltr.value(alarmFilter); _attId = _notifIrp.attach_push(_notifyServer, timetick, aCat, alarmFltr, ""); (new notificationThread()).start(); } catch (InvalidName | AdapterInactive | ParameterNotSupported | com.nsn.oss.nbi.internal.corba.NotificationIRPSystem.AtLeastOneNotificationCategoryNotSupported | InvalidParameter | com.nsn.oss.nbi.internal.corba.NotificationIRPSystem.Attach | com.nsn.oss.nbi.internal.corba.NotificationIRPSystem.AlreadySubscribed | ServantNotActive | WrongPolicy | GetNotificationCategories | OperationNotSupported e) { e.printStackTrace(); } } public void stopNotifications() { try { _notifIrp.detach(_notifyServer, _attId); _notificationOrb.shutdown(true); } catch (com.nsn.oss.nbi.internal.corba.NotificationIRPSystem.DetachException | ParameterNotSupported | InvalidParameter e) { e.printStackTrace(); } } public int renewSubscription() { com.nsn.oss.nbi.internal.corba.NotificationIRPConstDefs.SubscriptionStateHolder arg2 = new com.nsn.oss.nbi.internal.corba.NotificationIRPConstDefs.SubscriptionStateHolder(); IntHolder arg3 = new IntHolder(); StringTypeOptHolder arg1 = new StringTypeOptHolder(); arg1.value.value(alarmFilter); try { _notifIrp.get_subscription_status(_attId, arg1, arg2, arg3); } catch (InvalidParameter | com.nsn.oss.nbi.internal.corba.ManagedGenericIRPSystem.OperationNotSupported | com.nsn.oss.nbi.internal.corba.NotificationIRPSystem.GetSubscriptionStatus e) { e.printStackTrace(); } return arg2.value.value(); } private class IRPManager extends org.omg.CosNotifyComm.SequencePushConsumerPOA{ @Override public void push_structured_events(StructuredEvent[] notifications) throws org.omg.CosEventComm.Disconnected { for (StructuredEvent alarm: notifications) { alarmPrint(alarm); } } @Override public void offer_change(EventType[] arg0, EventType[] arg1) throws org.omg.CosNotifyComm.InvalidEventType { System.out.println("Offer Change!"); } @Override public void disconnect_sequence_push_consumer() { System.out.println("Disconnected!"); } } private class notificationThread extends Thread { public void run() { _notificationOrb.run(); } } }
Terima kasih atas perhatian anda Ternyata secara singkat, tetapi, menurut saya, poin utama dipertimbangkan, saya harap informasi ini bermanfaat. Pertanyaan dan komentar dipersilahkan.