We Keep Coding

Method keeps running and sending the same information even for different request grpc

I am trying to implement GRPC and when i do so I get the correct response from the server and if I stop the server and run it again and use the other request that I implemented it works however if I try and make a second request straight after making one in from the first request I get the same response. It's like it is looping.
These are the two methods I am using from the client:
public void setSpaces(int id) {
channel =ManagedChannelBuilder.forAddress("localhost", 3000)
// Channels are secure by default (via SSL/TLS). For the example we disable TLS to avoid
// needing certificates.
.usePlaintext()
.build();
blockingStub = carParkServiceGrpc.newBlockingStub(channel);
asyncStub = carParkServiceGrpc.newStub(channel);
logger.info("Will try to get CarPark " + id + " ...");
CarParkToUpdateRequest request = CarParkToUpdateRequest.newBuilder().setDeviceId(id).build();
carParkResponse response;
try {
response = blockingStub.setSpaces(request);
}catch(StatusRuntimeException e) {
logger.log(Level.WARNING, "RPC failed: {0}", e.getStatus());
return;
}finally {
channel.shutdown();
}
logger.info("Carpark: " + response.getCarPark());
spacesArea.append(response.getCarPark().toString());
}
public void setFull(int id) {
channel =ManagedChannelBuilder.forAddress("localhost", 3000)
// Channels are secure by default (via SSL/TLS). For the example we disable TLS to avoid
// needing certificates.
.usePlaintext()
.build();
blockingStub = carParkServiceGrpc.newBlockingStub(channel);
asyncStub = carParkServiceGrpc.newStub(channel);
logger.info("Will try to get CarPark " + id + " ...");
CarParkToUpdateRequest request = CarParkToUpdateRequest.newBuilder().setDeviceId(id).build();
carParkResponse response;
try {
response = blockingStub.setFull(request);
}catch(StatusRuntimeException e) {
logger.log(Level.WARNING, "RPC failed: {0}", e.getStatus());
return;
}finally {
channel.shutdown();
}
logger.info("Carpark: " + response.getCarPark());
fullArea.append(response.getCarPark().toString());
}
These two methods are supposed to send a request to the server to change the status of the 'car park' so if I send a request with setFull I get a response saying the carpark is full etc.
These are the methods from the server:
public void setSpaces(CarParkToUpdateRequest request, StreamObserver<carParkResponse> rStreamObserver) {
ArrayList<CarParkOperations.proto.cp.CarPark> carList = Car.getInstance();
for(int i=0; i<carList.size(); i++) {
if(carList.get(i).getCarParkId() == request.getDeviceId()) {
CarParkOperations.proto.cp.CarPark heater_rec = (CarParkOperations.proto.cp.CarPark) carList.get(i);
Car.carparkCar.clear();
Car.carparkCar.add(CarParkOperations.proto.cp.CarPark.newBuilder().setCarParkId(heater_rec.getCarParkId()).setLocation(heater_rec.getLocation()).setStatus("Spaces").build());
}
}
for(CarParkOperations.proto.cp.CarPark heater : Car.carparkCar) {
carParkResponse response = carParkResponse.newBuilder().setCarPark(heater).build();
rStreamObserver.onNext(response);
rStreamObserver.onCompleted();
return;
}
}
public void setFull(CarParkToUpdateRequest request, StreamObserver<carParkResponse> rStreamObserver) {
ArrayList<CarParkOperations.proto.cp.CarPark> carList = Car.getInstance();
for(int i=0; i<carList.size(); i++) {
if(carList.get(i).getCarParkId() == request.getDeviceId()) {
CarParkOperations.proto.cp.CarPark heater_rec = (CarParkOperations.proto.cp.CarPark) carList.get(i);
Car.carparkCar.clear();
Car.carparkCar.add(CarParkOperations.proto.cp.CarPark.newBuilder().setCarParkId(heater_rec.getCarParkId()).setLocation(heater_rec.getLocation()).setStatus("Full").build());
}
}
for(CarParkOperations.proto.cp.CarPark heater : Car.carparkCar) {
carParkResponse response = carParkResponse.newBuilder().setCarPark(heater).build();
rStreamObserver.onNext(response);
rStreamObserver.onCompleted();
return;
}
}
I think it's most likely something to do with the server methods but cant seem to figure it out.
This is where I am storing the data:
package CarParkOperations.proto.cp;
import java.util.ArrayList;
import com.google.rpc.Status;
public class Car extends ArrayList<CarPark>{
public static Car carparkCar;
public static Car getInstance() {
if(carparkCar == null) {
carparkCar = new Car();
}
return carparkCar;
}
public Car() {
this.add(CarParkOperations.proto.cp.CarPark.newBuilder().setCarParkId(1).setStatus("Full").setLocation("Behind Building 1").build());
this.add(CarParkOperations.proto.cp.CarPark.newBuilder().setCarParkId(2).setStatus("Full").setLocation("Behind Building 1").build());
this.add(CarParkOperations.proto.cp.CarPark.newBuilder().setCarParkId(3).setStatus("Full").setLocation("Behind Building 4").build());
this.add(CarParkOperations.proto.cp.CarPark.newBuilder().setCarParkId(4).setStatus("Full").setLocation("Behind Building 3").build());
this.add(CarParkOperations.proto.cp.CarPark.newBuilder().setCarParkId(5).setStatus("Full").setLocation("Behind Building 2").build());
this.add(CarParkOperations.proto.cp.CarPark.newBuilder().setCarParkId(6).setStatus("Full").setLocation("Behind Building 1").build());
this.add(CarParkOperations.proto.cp.CarPark.newBuilder().setCarParkId(7).setStatus("Full").setLocation("Behind Building 1").build());
this.add(CarParkOperations.proto.cp.CarPark.newBuilder().setCarParkId(10).setStatus("Full").setLocation("Behind Building 6").build());
this.add(CarParkOperations.proto.cp.CarPark.newBuilder().setCarParkId(11).setStatus("Full").setLocation("Behind Building 1").build());
this.add(CarParkOperations.proto.cp.CarPark.newBuilder().setCarParkId(12).setStatus("Spaces").setLocation("Behind Building 1").build());
this.add(CarParkOperations.proto.cp.CarPark.newBuilder().setCarParkId(13).setStatus("Spaces").setLocation("Behind Building 1").build());
this.add(CarParkOperations.proto.cp.CarPark.newBuilder().setCarParkId(14).setStatus("Spaces").setLocation("Behind Building 1").build());
}
}
Any suggestions would be much appreciated.

You might need synchronize Car.getInstance() method, because without proper synchronization, if it is called by different threads it may surprisingly return different instances!
public static synchronized Car getInstance() {
if(carparkCar == null) {
carparkCar = new Car();
}
return carparkCar;
}
Also your Car class is not thread-safe because it extends ArrayList which is not thread-safe. You should let your Car class extend something like ConcurrentLinkedQueue instead, or let your Car class compose a field of list = Collections.synchronizedList(new ArrayList()) instead of extending ArrayList.

Java Web Service SOAP with Tomcat

I have this problem:
I'm created a web service in NetBeans IDE and TomCat as a server. This is my web service:
#WebService(serviceName = "wsEagle_au")
public class wsEagle_au
{
private pSession psession;
#WebMethod(operationName = "log_in")
public ArrayList log_in(#WebParam(name = "NICK_USER") String
NICK_USER,#WebParam(name = "HASH_USER") String HASH_USER)throws
Exception
{
psession=new pSession();
return psession.log_in(NICK_USER.toUpperCase(), HASH_USER);
}
}
and this is the method where the arraylist is filled:
public ArrayList log_in(mSession msession) throws JSONException
{
try
{
cfunctions=new cFunctions(msession.getNICK_USER());
msession.setHASH_USER(cfunctions.crypt(msession.getHASH_USER()));
res_array=new ArrayList();
res_jobject=new JSONObject();
sqlquery="sqlQuery";
sql.getConnection();
sql.prepareStatement(sqlquery);
sql.setString(1,msession.getNICK_USER());
sql.setString(2,msession.getHASH_USER());
datareader=sql.executeQuery();
if(datareader!=null&&datareader.next()){
res_jobject.put("ID_USER",datareader.getInt("ID_USER"));
res_jobject.put("NAME_USER",datareader.getString("NAME_USER"));
res_jobject.put("CNCIASIDN",datareader.getInt("CNCIASIDN"));
res_jobject.put("SUSUUSID",datareader.getInt("SUSUUSID"));
res_array.add(res_jobject);
}
else
{
//Password o User incorrect
res_array.clear();
res_jobject=new JSONObject();
res_jobject.put("error","002");
res_array.add(res_jobject);
}
}
catch(Exception ex)
{
//Inesperate error.
res_array=new ArrayList();
res_jobject=new JSONObject();
res_jobject.put("error","002");
res_array.add(res_jobject);
}
return res_array;
}
When I tested with SOAP UI, I obtained this response:
SOAPUI RESPONSE
How can I return the arraylist?

Not able to load application.conf from cron job in play framework 2.4

I have created a cron job that start during application restart but when i tried to create db connection i am geeting null pointer exception. I am able to create and use db from other module using same configuration.
Below is my Application.conf
db.abc.driver=com.mysql.jdbc.Driver
db.abc.url="jdbc:mysql://localhost:3306/db_name?useSSL=false"
db.abc.username=root
db.abc.password=""
db.abc.autocommit=false
db.abc.isolation=READ_COMMITTED
And code that tried to access db is
public class SchduleJob extends AbstractModule{
#Override
protected void configure() {
bind(JobOne.class)
.to(JobOneImpl.class)
.asEagerSingleton();
} }
#ImplementedBy(JobOneImpl.class)
public interface JobOne {}
#Singleton
public class JobOneImpl implements JobOne {
final ActorSystem actorSystem = ActorSystem.create("name");
final ActorRef alertActor = actorSystem.actorOf(AlertActor.props);
public JobOneImpl() {
scheduleJobs();
}
private Cancellable scheduleJobs() {
return actorSystem.scheduler().schedule(
Duration.create(0, TimeUnit.MILLISECONDS), //Initial delay 0 milliseconds
Duration.create(6, TimeUnit.MINUTES), //Frequency 30 minutes
alertActor,
"alert",
actorSystem.dispatcher(),
null
);
}
}
public class AlertActor extends UntypedActor{
public static Props props = Props.create(AlertActor.class);
final ActorSystem actorSystem = ActorSystem.create("name");
final ActorRef messageActor = actorSystem.actorOf(MessageActor.props());
#Override
public void onReceive(Object message) throws Exception {
if(message != null && message instanceof String) {
RequestDAO requestDAO = new RequestDAO();
try {
List<DBRow> rows = requestDAO.getAllRow();
} catch(Exception exception) {
exception.printStackTrace();
}
}
}
}
public class RequestDAO {
public List<DBRow> getAllRow() throws Exception {
List<DBRow> rows = new ArrayList<DBRow>();
Connection connection = null;
try {
connection = DB.getDataSource("abc").getConnection();
connection.setAutoCommit(false);
} catch(Exception exception) {
exception.printStackTrace();
if(connection != null) {
connection.rollback();
} else {
System.out.println("in else***********");
}
return null;
} finally {
if(connection != null)
connection.close();
}
return schools;
}
When i am calling method getAllRow() of RequestDAO class it's throwing
java.lang.NullPointerException
at play.api.Application$$anonfun$instanceCache$1.apply(Application.scala:235)
at play.api.Application$$anonfun$instanceCache$1.apply(Application.scala:235)
at play.utils.InlineCache.fresh(InlineCache.scala:69)
at play.utils.InlineCache.apply(InlineCache.scala:55)
at play.api.db.DB$.db(DB.scala:22)
at play.api.db.DB$.getDataSource(DB.scala:41)
at play.api.db.DB.getDataSource(DB.scala)
at play.db.DB.getDataSource(DB.java:33)
But same code is working without cron job. What should i do to remove this error

Play uses the Typesafe config library for configuration.
I suspect your current working directory from the cron script isn't set, so it's probably not finding your application.conf (application.properties) file.
However, Config is nice in that it allows you to specify where to look for the file, either by its base name (to choose among .conf | .properties | .json extensions) or the filename including the extension on the java command line:
To specify the base name, use -Dconfig.resource=/path/to/application
To specify the full name, use -Dconfig.file=/path/to/application.properties

Alljoyn framework - Java - Signals . BUS_NO_SUCH_INTERFACE

It's a quite specific question but after days stuck in the same place and not getting any response in the Alljoyn forum, I decided to post it here. Maybe someone worked with this framework.
I am doing a project and I need the use of the signal mechanish that Alljoyn framework provides. However, I do need the signals inside a session and the example provides in the api core is sessionless.
In my case I need the service (server) to raise a signal and the client to receive it, but I am getting this error. Following the api samples, I managed to create a simple app that exchange messages through the methods defined in the interface, so I know that the communication is working. In this case, the service waits until the client connects and the send the signal. The client joins the session and right after register the signal and I am getting the BUS_NO_SUCH_INTERFACE error. I tried also to register after and before sending the signal, same problem. I think that for some reason the client does not find the bussignalhandler but I don't know why. I also put it in an external class and it didn't work.
I'm following the example in the core api guide:
https://allseenalliance.org/developers/develop/api-guide/core/android
This is the part where the service register and emit the signal:
SignalEmitter emitter = new SignalEmitter(mySignalInterface, joinerName,
sessionId,
SignalEmitter.GlobalBroadcast.Off);
myInterface = emitter.getInterface(SampleInterface.class);
// Emitting signals myInterface.buttonClicked(1);
myInterface.playerPosition(12, 1, -24);
However, in that example, I can't see a definition for myInterface. and I know it is not a mistake and they meant mySignalInterface because the method getInterface asks for an interface object and mySignalInterface is a class which implements that interface.
I put here the example I created and I'll upload the files in case someone wants to try them.
#BusInterface(name = "org.alljoyn.bus.samples.simple.SimpleInterface")
public interface SimpleInterface {
#BusMethod
String Ping(String inStr) throws BusException;
#BusSignal
public void playerPosition(int x, int y, int z) throws BusException;
}
Service:
Class inside the service to implement the signal and method
class SimpleService implements SimpleInterface, BusObject {
public String Ping(String inStr) {
mHandler.sendMessage(mHandler.obtainMessage(MESSAGE_PING, inStr));
return inStr;
}
public void playerPosition(int x, int y, int z) { /* no implementation needed here*/}
}
Here part of the code that makes the connection in the service:
case CONNECT: {
org.alljoyn.bus.alljoyn.DaemonInit.PrepareDaemon(getApplicationContext());
mBus = new BusAttachment(getPackageName(), BusAttachment.RemoteMessage.Receive);
mBus.registerBusListener(new BusListener());
Status status = mBus.registerBusObject(mSimpleService, "/SimpleService");
if (status != Status.OK) {...}
status = mBus.connect();
logStatus("BusAttachment.connect()", status);
if (status != Status.OK) {...}
int flag = 0;
status = mBus.requestName(SERVICE_NAME, flag);
logStatus(String.format("BusAttachment.requestName(%s, 0x%08x)", SERVICE_NAME, flag), status);
if (status == Status.OK) {
status = mBus.advertiseName(SERVICE_NAME, SessionOpts.TRANSPORT_ANY);
logStatus(String.format("BusAttachement.advertiseName(%s)", SERVICE_NAME), status);
if (status != Status.OK) {...}
}
Mutable.ShortValue contactPort = new Mutable.ShortValue(CONTACT_PORT);
SessionOpts sessionOpts = new SessionOpts();
sessionOpts.traffic = SessionOpts.TRAFFIC_MESSAGES;
sessionOpts.isMultipoint = false;
sessionOpts.proximity = SessionOpts.PROXIMITY_ANY;
sessionOpts.transports = SessionOpts.TRANSPORT_ANY + SessionOpts.TRANSPORT_WFD;
status = mBus.bindSessionPort(contactPort, sessionOpts, new SessionPortListener() {
#Override
public boolean acceptSessionJoiner(short sessionPort, String joiner, SessionOpts sessionOpts) {
return sessionPort == CONTACT_PORT;
}
#Override
public void sessionJoined(short port, int id, String s) {
sessionId = id; joinerName = s; sessionEstablished = true;
}
});
logStatus(String.format("BusAttachment.bindSessionPort(%d, %s)",
contactPort.value, sessionOpts.toString()), status);
if (status != Status.OK) {...}
try {
while (!sessionEstablished) {
Thread.sleep(10);
}
SignalEmitter emitter = new SignalEmitter(mSimpleService, joinerName, sessionId, SignalEmitter.GlobalBroadcast.Off);
SimpleInterface myInterface = emitter.getInterface(SimpleInterface.class);
myInterface.playerPosition(12,1,1);
}
catch (BusException ex) {... }
}
Client:
/*On create of the activity which has a button and a text view to send text to the server */
mEditText.setOnEditorActionListener(new TextView.OnEditorActionListener() {
public boolean onEditorAction(TextView view, int actionId, KeyEvent event) {
if (actionId == EditorInfo.IME_NULL
&& event.getAction() == KeyEvent.ACTION_UP) {
/* Call the remote object's Ping method. */
Message msg = mBusHandler.obtainMessage(BusHandler.PING,
view.getText().toString());
mBusHandler.sendMessage(msg);
}
return true;
}
});
private static final String SERVICE_NAME = "org.alljoyn.bus.samples.simple";
private static final short CONTACT_PORT=42;
private BusAttachment mBus;
private ProxyBusObject mProxyObj;
private SimpleInterface mSimpleInterface;
case CONNECT: {
org.alljoyn.bus.alljoyn.DaemonInit.PrepareDaemon(getApplicationContext());
mBus = new BusAttachment(getPackageName(), BusAttachment.RemoteMessage.Receive);
mBus.registerBusListener(new BusListener() {
#Override
public void foundAdvertisedName(String name, short transport, String namePrefix) {
if(!mIsConnected) {
Message msg = obtainMessage(JOIN_SESSION);
msg.arg1 = transport;
msg.obj = name;
sendMessage(msg);
}
}
});
Status status = mBus.connect();
logStatus("BusAttachment.connect()", status);
if (Status.OK != status) {...}
status = mBus.findAdvertisedName(SERVICE_NAME);
logStatus(String.format("BusAttachement.findAdvertisedName(%s)", SERVICE_NAME), status);
if (Status.OK != status) {...}
break;
}
case (JOIN_SESSION): {
if (mIsStoppingDiscovery) {
break;
}
short contactPort = CONTACT_PORT;
SessionOpts sessionOpts = new SessionOpts();
sessionOpts.transports = (short)msg.arg1;
Mutable.IntegerValue sessionId = new Mutable.IntegerValue();
Status status = mBus.joinSession((String) msg.obj, contactPort, sessionId, sessionOpts, new SessionListener() {
#Override
public void sessionLost(int sessionId, int reason) {
mIsConnected = false;
logInfo(String.format("MyBusListener.sessionLost(sessionId = %d, reason = %d)", sessionId,reason));
mHandler.sendEmptyMessage(MESSAGE_START_PROGRESS_DIALOG);
}
});
if (status == Status.OK) {
mProxyObj = mBus.getProxyBusObject(SERVICE_NAME,
"/SimpleService",
sessionId.value,
new Class<?>[] { SimpleInterface.class });
mSimpleInterface = mProxyObj.getInterface(SimpleInterface.class);
mSessionId = sessionId.value;
mIsConnected = true;
mHandler.sendEmptyMessage(MESSAGE_STOP_PROGRESS_DIALOG);
}
break;
status = mBus.registerSignalHandlers(this);
if (status != Status.OK) {...}
}
case PING: {
try {
if (mSimpleInterface != null) {
sendUiMessage(MESSAGE_PING, msg.obj);
String reply = mSimpleInterface.Ping((String) msg.obj);
sendUiMessage(MESSAGE_PING_REPLY, reply);
} catch {...}
}
...here some more code...
#BusSignalHandler(iface="org.alljoyn.bus.samples.simple.SimpleInterface", signal="playerPosition")
public void playerPosition(int x, int y, int z) {
sendUiMessage(MESSAGE_POST_TOAST, "Signal captured");
}
In this example, I have my client which has a textview where I can add text and send a ping to the server. This is working if I get rid of the registering signal part. I tried to do it as the api core says, with the Thread.sleep but doesn't work either.
Here I add the code of both of my applications (client & server) based on the samples that are in the alljoyn api.
https://github.com/JavierT/Alljoyn_signal_sample
Please let me know if you have some doubts, it was hard to put all the information in one post.
Thank you in advance.

I think this should solve your problem
Alljoyn BusSignalHandler
either of the following may be used to annotate a signal handler:
#BusSignalHandler(iface = "org.sample.MyInterface", signal = "MySignal")
public void handleSignal(String str)
{
}
#BusSignalHandler(iface = "org.myapp.IMyInterface", signal = "EmitMySignal")
public void handleSignal(String str)
{
}
The first example may be used succesfully when IMyInterface is known to the BusAttachment via a previous call to BusAttachment.registerBusObject(BusObject, String) or BusAttachment.getProxyBusObject(String, String, int, Class[]).
The second example may be used succesfully when IMyInterface is unknown to the BusAttachment.
using the second example should solve your problem.
Also, in your Client program as per the link provided above,
#BusSignalHandler(iface="org.alljoyn.bus.samples.simple.SimpleInterface", signal="playerPosition")
should be replaced with
#BusSignalHandler(iface="org.alljoyn.bus.samples.simpleclient.SimpleInterface", signal="playerPosition")

When you call registerSignalHandlers you must pass an object that implements the interface SimpleInterface and the method playerPosition will be called in that object when you receives a signal.
I believe (I've read the code quickly, I hope I'm not wrong) that you pass your BusHandler object, which does not implements SimpleInterface.

Please change :
private static final String SERVICE_NAME = "org.alljoyn.bus.samples.simple";
to
"org.alljoyn.bus.samples.simple.SimpleInterface" as you have interface name ,
both should be same . as when the Get method of BusObject is called the interface names does not match.

Handling Exception custom in JAX-WS

I have web service, developed using JAX-WS. Now i wanted to throw SOAPFault with customized error codes on certain conditions.
I have a webfault:
#WebFault(name = "BankExceptionFault1_Fault", targetNamespace = NS.namespace)
public class BankException extends Exception {
private WebMethodStatus faultInfo;
public BankException(Errors error) {
this(error, error.name());
}
public WebMethodStatus getFaultInfo() {
return faultInfo;
}
public BankException(Errors error, String description) {
super(error.getErrorCode());
this.faultInfo = new WebMethodStatus(error, description);
}
}
And In some method, for a given condition, throws exception:
#Override
#WebMethod(operationName = "UpdateAccountRecord")
#WebResult(name = "Result")
#LogExecution
public WebMethodStatus updateAccountRecord(
#WebParam(name = "Request") UpdateAccountRequest request) throws BankException {
if (!Boolean.parseBoolean(specialMode)) {
throw new BankException(Errors.INVALID_RUNNING_MODE,
"Can't update account record. For updating need special running mode");
}
service.updateAccountRecord(request);
return new WebMethodSuccessStatus();
}
In spring-mvc app, I want to catch my exception:
try {
wsPort.updateAccountRecord(updateAccountRequest);
} catch (BankException e) {
throwException(e);
}
catch(RemoteAccessException e){
throwException(e);
}
But always return RemoteAccessException, if try to update account using sring-mvc app.
detailMessage:Could not access remote service at [http://localhost:8080/my-app-2.1.1-SNAPSHOT/app/MyApp]
cause: java.lang.IllegalStateException: Current event not START_ELEMENT or END_ELEMENT
But if I use soapui for update account, returns correct exception:
BNK00017
Can't update account record. For updating need special running mode

If wsPort is something like an injected JaxWsPortProxyFactoryBean, then it's likely that your exception is being wrapped by RemoteAccessException. Try using RemoteAccessException.getCause() and see what you get...