I have a question about mapping, map key and map values.
I am writing a chat program : I have a problem to add a message. I can't add a message. That puts me in a empty web page with an error(can't see the number and reason of error)
Can you tell me where is the problem ?
// add a message to a chatroom
#RequestMapping(value="/addMessageSalon/{salon}/{pseudo}/{message}", method = {RequestMethod.GET, RequestMethod.POST})
public String addMessageSalon(HttpServletRequest request, #PathVariable("salon") String chatroom, #PathVariable("pseudo") String username, #PathVariable("message") String message) {
Message mes = null;
mes.setMessage(message);
mes.setPseudo(username);
GestionMessages addition = (GestionMessages)request.getSession().getServletContext().getAttribute("gestionMessages");
Map<String, ArrayList<Message>> resultat = addition.getMessages();
Iterator<Map.Entry<String, ArrayList<Message>>> entries = resultat.entrySet().iterator();
// iteration
while(entries.hasNext()) {
Map.Entry<String, ArrayList<Message>> entry = entries.next();
if(!entries.hasNext() && !entry.getKey().contains(chatroom)) {
// if chatroom does not exist, we give an error
throw new IllegalArgumentException("Chatroom '" + chatroom + "' doesn't exist");
}
if(entry.getKey().contains(chatroom)){
ControleurPrincipal.getUsersInDataBase().add(username);
addition.getMessagesSalon(chatroom).add(mes);
break;
}
}
resultat = addition.getMessages();
return "redirect:/";
}
First of all:
Message mes = null;
mes.setMessage(message);
This will throw a NullPointerException, every time. So either that's the error you're getting, or that is not your code.
If that's your actual code, then you need to instantiate Message first, like this:
Message mes = new Message();
Instead of doing this
if(!entries.hasNext() && !entry.getKey().contains(monSalon)) {
you might want to do
if(!resultat.contains(monSalon)) {
and do it before the while.
Related
I am setting up the Backend code of a chat messaging system for an app my group is creating using WebSockets. My goal is for our app to be able to send and receive messages in a public group chat, and also specifically Direct Message (DM) specific people with an # symbol, in front of the recipient's username.
I managed to get the public group messaging component working perfectly fine. However, I am running into an issue with the DM functionality. Let's say for example a person named "test" wrote a message to someone named "teacher" and here was what they typed: "#teacher testMessage". Ideally, I would want the program to send the message "testMessage" to "teacher" only. However, every time I would test the program using Postman, I would end up with the following error:
java.lang.NullPointerException: Cannot invoke "javax.websocket.Session.getBasicRemote()" because the return value of "java.util.Map.get(Object)" is null
From my understanding, the error means that the variable type the method is supposed to receive (in this case a String), is not what it is actually getting.
Here is the code below:
private static Map < Session, String > sessionUsernameMap = new Hashtable<>();
private static Map < String, Session > usernameSessionMap = new Hashtable<>();
#OnMessage
public void onMessage(Session session, String message) throws IOException { //The message is the the entire thing that the person types (ex: #teacher testMessage)
logger.info("Message Received: " + message); //String message = #teacher testMessage
String username = sessionUsernameMap.get(session); //String username = "test" This is the username of the person who wrote the message
if (message.startsWith("#")) {
String destUsername = message.split(" ")[0].substring(1); //destUsername = "teacher"
String realMessage = message.substring(message.lastIndexOf(" ") + 1); //realMessage = "testMessage"
sendMessageToParticularUser(destUsername, "[DM] " + username + ": " + realMessage); //puts in "teacher" for destUsername and "testMessage" for realMessage
sendMessageToParticularUser(username, "[DM] " + username + ": " + message);
}
else {
broadcast(username + ": " + message);
}
msgRepo.save(new Message(username, message));
}
private void sendMessageToParticularUser(String username, String message) {
System.out.println(message);
try {
usernameSessionMap.get(username).getBasicRemote().sendText(message); //PROBLEM RIGHT HERE WITH .get(username)
} catch (IOException e) {
logger.info("Exception: " + e.getMessage().toString());
e.printStackTrace();
}
}
I have been working on this issue for a few hours now with no luck. I would very much appreciate any help or input on this. Thank you.
I got an error in my quickfixj Application. First, I got an error like this:
Out of order repeating group members
After that, I added this text into my initiator.config:
ValidateUserDefinedFields=N
ValidateIncomingMessage=N
But now I got another error in my application:
quickfix.FieldNotFound: Field was not found in message, field=55
at quickfix.FieldMap.getField(FieldMap.java:223)
at quickfix.FieldMap.getString(FieldMap.java:237)
at com.dxtr.fastmatch.marketdatarequestapps.TestMarketdataRequest.fromApp(TestMarketdataRequest.java:38)
at quickfix.Session.fromCallback(Session.java:1847)
at quickfix.Session.verify(Session.java:1791)
at quickfix.Session.verify(Session.java:1862)
at quickfix.Session.next(Session.java:1047)
at quickfix.Session.next(Session.java:1204)
at quickfix.mina.SingleThreadedEventHandlingStrategy$SessionMessageEvent.processMessage(SingleThreadedEventHandlingStrategy.java:163)
at quickfix.mina.SingleThreadedEventHandlingStrategy.block(SingleThreadedEventHandlingStrategy.java:113)
at quickfix.mina.SingleThreadedEventHandlingStrategy.lambda$blockInThread$1(SingleThreadedEventHandlingStrategy.java:145)
at quickfix.mina.SingleThreadedEventHandlingStrategy$ThreadAdapter$RunnableWrapper.run(SingleThreadedEventHandlingStrategy.java:267)
at java.lang.Thread.run(Thread.java:748)
My code for get value of symbols is :
public void fromApp(quickfix.Message message, SessionID sessionID)
throws FieldNotFound, IncorrectDataFormat, IncorrectTagValue, UnsupportedMessageType {
try {
String symbol = message.getString(Symbol.FIELD);
System.out.println(" FromApp " + message);
message.getString(TransactTime.FIELD);
// String seqNo = message.getString(MsgSeqNum.FIELD);
double bid = message.getDouble(MDEntryPx.FIELD);
double ask = message.getDouble(MDEntryPx.FIELD);
// System.out.println(seqNo + " " + message);
} catch (FieldNotFound fieldNotFound) {
fieldNotFound.printStackTrace();
}
}
I have also using this code
public void onMessage (MarketDataIncrementalRefresh message, SessionID sessionID) throws FieldNotFound{
try
{
MDReqID mdreqid = new MDReqID();
SendingTime sendingtime = new SendingTime();
NoMDEntries nomdentries = new NoMDEntries();
quickfix.fix42.MarketDataIncrementalRefresh.NoMDEntries group
= new quickfix.fix42.MarketDataIncrementalRefresh.NoMDEntries();
MDUpdateAction mdupdateaction = new MDUpdateAction();
DeleteReason deletereason = new DeleteReason();
MDEntryType mdentrytype = new MDEntryType();
MDEntryID mdentryid = new MDEntryID();
Symbol symbol = new Symbol();
MDEntryOriginator mdentryoriginator = new MDEntryOriginator();
MDEntryPx mdentrypx = new MDEntryPx();
Currency currency = new Currency();
MDEntrySize mdentrysize = new MDEntrySize();
ExpireDate expiredate = new ExpireDate();
ExpireTime expiretime = new ExpireTime();
NumberOfOrders numberoforders = new NumberOfOrders();
MDEntryPositionNo mdentrypositionno = new MDEntryPositionNo();
message.getField(nomdentries);
message.getField(sendingtime);
message.getGroup(1, group);
int list = nomdentries.getValue();
for (int i = 0; i < list; i++)
{
message.getGroup(i + 1, group);
group.get(mdupdateaction);
if (mdupdateaction.getValue() == '2')
System.out.println("Enter");
group.get(deletereason);
group.get(mdentrytype);
group.get(mdentryid);
group.get(symbol);
group.get(mdentryoriginator);
if (mdupdateaction.getValue() == '0')
group.get(mdentrypx);
group.get(currency);
if (mdupdateaction.getValue() == '0')
group.get(mdentrysize);
}
System.out.printf("Got Symbol {0} Price {1}",
symbol.getValue(), mdentrypx.getValue());
}catch (Exception ex)
{
System.out.println("error" + ex);
}
but i also get error like this
quickfix.FieldNotFound: Field was not found in message, field=55
at quickfix.FieldMap.getField(FieldMap.java:223)
at quickfix.FieldMap.getString(FieldMap.java:237)
at com.dxtr.fastmatch.marketdatarequestapps.TestMarketdataRequest.fromApp(TestMarketdataRequest.java:39)
at quickfix.Session.fromCallback(Session.java:1847)
at quickfix.Session.verify(Session.java:1791)
at quickfix.Session.verify(Session.java:1862)
at quickfix.Session.next(Session.java:1047)
at quickfix.Session.next(Session.java:1204)
at quickfix.mina.SingleThreadedEventHandlingStrategy$SessionMessageEvent.processMessage(SingleThreadedEventHandlingStrategy.java:163)
at quickfix.mina.SingleThreadedEventHandlingStrategy.block(SingleThreadedEventHandlingStrategy.java:113)
at quickfix.mina.SingleThreadedEventHandlingStrategy.lambda$blockInpacket_write_wait: Connection to 3.13.235.241 port 22: Broken pipe
and here the value i check in my message.log
8=FIX.4.2^A9=0217^A35=X^A34=7291^A49=Fastmatch1^A52=20200401-10:47:59.833^A56=MDValueTrade2UAT1^A262=VT_020^A268=02^A279=2^A55=GBP/CHF^A269=0^A278=1140851192^A270=1.19503^A271=02000000^A279=0^A55=GBP/CHF^A269=0^A278=1140851194^A270=1.19502^A271=06000000^A10=114^A
my broker have send to me the price and etc
My question is: how to fix my problem from this code ?
First, I got an error like this:
Out of order repeating group members
Your data dictionary doesn't match your counterparty's. Fix that and this will go away.
After that, I added this text into my initiator.config:
ValidateUserDefinedFields=N
ValidateIncomingMessage=N
This did not fix anything -- it HIDES your actual problem and has you looking at a new fake problem.
What you need to do:
Your configuration has this, right?
UseDataDictionary=Y
DataDictionary=path/to/FIXnn.xml
# or if FIX5:
AppDataDictionary=path/to/FIX5n.xml
TransportDataDictionary=path/to/FIXT.xml
Find your counterparty's documentation, and make sure your xml file's messages and fields match what they say they're going to send you. Make sure all repeating groups have the same fields in the same order.
Here is some documentation about how the Data Dictionary xml file is structured. It's pretty easy.
so as part of some work I've been doing I was given a file with WebServices that are being used in a Swift application. I have zero familiarity with WebServices and only know Java through syntax understanding. I need to call one of these gets with a parameter from the swift application. What I'm trying to figure out first and foremost is how I can call one of these webservices with a parameter from the URL it's associated with. For example down below I want to call the method
http://localhost:9000/ListVehicleByPlateNumber
and I want to specify the parameter through the URL say something like
http://localhost:9000/ListVehicleByPlateNumber?para="123"
But this doesn't assign any value to the parameter and I'm not getting results. If I hardcode so that the string used in the function is = "123" it gives me the results I'm looking for. I just need to know how I can pass this parameter through the url, syntax-wise.
Routes file
GET /ListVehicleByPlateNumber controllers.NewVehicle.listVehicleByPlateNumber(para: String ?="")
Controller
public Result listVehicleByPlateNumber(String para){
NewVehicleModel v = new NewVehicleModel();
List<NewVehicleModel> vehiclesC = v.searchByPlateVehicle(para);
ObjectNode wrapper = Json.newObject();
ObjectNode msg = Json.newObject();
if(vehiclesC != null) {
msg.set("VehicleList", toJson(vehiclesC));
wrapper.set("success", msg);
return ok(wrapper);
}else{
msg.put("error", "There are no vehicles with the plate number");
wrapper.set("error", msg);
return badRequest(wrapper);
}
}
Where it's called
public List<NewVehicleModel> searchByPlateVehicle(String plateNumber){
Transaction t = Ebean.beginTransaction();
List<NewVehicleModel> vehicles = new ArrayList<>();
try {
String sql = "SELECT V.idNewVehicle, V.VehicleType,V.PlateNumber,V.VehicleJurisdiction,V.State,V.Vin,V.Year, " +
"V.Make,V.modelos,V.RegistrationNumber,V.InsuranceCompany,V.PurchaseDate,V.ExpirationDate,V.idPersonaFK " +
"FROM NewVehicle V " +
"WHERE V.PlateNumber = :plateNumber";
RawSql rawSql = RawSqlBuilder.parse(sql)
.columnMapping("V.idNewVehicle", "idNewVehicle")
.columnMapping("V.State", "state")
.columnMapping("V.VehicleType", "vehicleType")
.columnMapping("V.PlateNumber", "plateNumber")
.columnMapping("V.VehicleJurisdiction", "vehicleJurisdiction")
.columnMapping("V.Vin", "vin")
.columnMapping("V.Year", "year")
.columnMapping("V.Make", "make")
.columnMapping("V.modelos", "modelos")
.columnMapping("V.RegistrationNumber", "registrationNumber")
.columnMapping("V.InsuranceCompany", "insuranceCompany")
.columnMapping("V.PurchaseDate", "purchaseDate")
.columnMapping("V.ExpirationDate", "expirationDate")
.columnMapping("V.idPersonaFK", "idPersonaFK")
.create();
Query<NewVehicleModel> query = Ebean.find(NewVehicleModel.class);
query.setRawSql(rawSql)
.setParameter("plateNumber", plateNumber);
vehicles = query.findList();
t.commit();
}
catch (Exception e){
System.out.println(e.getMessage());
}finally {
t.end();
}
return vehicles;
}
Found my own answer. I ended up casting from Integer to String here's how it looks in routes
GET /ListVehicleByPlateNumber/:para controllers.NewVehicle.listVehicleByPlateNumber(para: Integer )
Controller
public Result listVehicleByPlateNumber(int para){
String p = String.valueOf(para);
URI Format for value 123 example.
http://localhost:9000/ListVehicleByPlateNumber/123
could someone help me. Here is my problem :
I try to send an object with jms (this part works) and receive it with jms.
My object is quite simple. 3 String, 3 int, and a boolean.
There are no problem of connexion or anything like this. I receive the object but it's as if I received every things one by one.
Here is my MessageListener :
MessageListener listner = new MessageListener() {
public void onMessage(Message message) {
ObectToSend yo=null;
try {
if (message instanceof ObjectMessage) {
ObjectMessage myMessage = (ObjectMessage) message;
System.err.println("test");
yo = (ObectToSend) myMessage.getObject();
System.err.println("test2");
System.err.println(yo.entite + " " + yo.error + " " + yo.idGloreg + " " + yo.indPerso + " " + yo.nom + " " + yo.prenom + " " + yo.nom);
}
} catch (JMSException e) {
System.out.println("Caught:" + e);
e.printStackTrace();
}
}
};
And that my sending part :
Serializable ObectTest = new ObectToSend("pro", "enc", 134, 10, true, "yayaya", 0);
MessageProducer producer = session.createProducer(topic);
producer.setDeliveryMode(DeliveryMode.PERSISTENT);
ObjectMessage message = session.createObjectMessage();
message.setObject(ObectTest);
connection.start();
producer.send(message);
Finally here is what I want to send (in receiver.java and sender.java) :
public static class ObectToSend implements Serializable{
private static final long serialVersionUID = 1L;
String prenom;
String nom;
int idGloreg;
int indPerso;
boolean ok;
String entite;
int error;
ObectToSend(String prenomP, String nomP, int idGloregP, int indPersoP, boolean okP, String entiteP, int errorP){
prenom = prenomP ;
nom= nomP;
idGloreg = idGloregP;
indPerso = indPersoP;
ok = okP;
entite= entiteP;
error = errorP;
}
}
My console :
test
test
test
test
test
test
test
If someone could tell me what's the problem that would be great. I don't get it. My textmessage with topic/queue/sync/async are working so nicely. It comes to object and....
It seems the problem is here :
yo = (ObectToSend) myMessage.getObject();
but.....
For future users of JMS I will answer my own question.
It was really hard to find any information as it's not explained in JMS documentation.
I found a lot of people asking how to do it but never had any answer. That's because it's not releated to JMS but to Java.
So here it goes :
If you want to use a same classe (object) like
ObectToSend yo = (ObectToSend) myMessage.getObject();
My first object (yo) is from the class ObectToSend.java in the package com.test.jms and my second object (myMessage.getObject() ) is from the package com.test.jms2. So I have an exception like "notfoundclass". And cannot cast objects.
The class ObectToSend.java should be in both projects. But you can't just copy paste with the same name (what I stupidly did).
You need to create a jar of the class used in both projects/packages and add it to both projects.
That way you use EXACTLY the same class and not a copy of it. And your 2 objects are exactly the same.
You could also use a map message. Indeed, you only have strings, ints, and booleans. You actually don't need an object. MapMessage is here for you and is much much simpler.
Here is an exemple :
// create mapMessage
message = session.createMapMessage();
// Here insert variables in properties of the message
// This can be filtred with selector
message.setStringProperty("entity", entity);
message.setStringProperty("messageFrom", messageFrom);
// Here insert variables in body of the message
//This CAN'T be filtred (what you want I think)
message.setString("title", title);
message.setString("description", description);
// Get map message
MapMessage mapMessage = (MapMessage) message;
// Here get variables of your message
String title = mapMessage.getString("title");
String description = mapMessage.getString("description");
See how simple it is ?
Hope your problem is resolved, but my problem is still there
and I thought that you can help me to get out of this problem.
actually I had multiple events to publish one by one as per user
selection for eg: user select Season, Service, DateFrom and
DateTo and then clicks on the refresh button.
When the refresh button is clicked I had used the above logic to
get all the datas using the below mentioned code
public void onClick$ref(Event event){
if(lbox_service.getSelectedIndex() != 0 || lbox_season.getSelectedIndex() != 0)
{
if(lbox_service.getSelectedIndex() == 0)
{
setService_id("0");
}
else
{
setService_id(lbox_service.getSelectedItem().getValue().toString());
}
if(lbox_season.getSelectedIndex() == 0)
{
setSeason_id("0");
}
else
{
setSeason_id(lbox_season.getSelectedItem().getValue().toString());
}
System.out.println("Service Index 11 : "+ lbox_service.getSelectedIndex());
System.out.println("Season Index 11 : "+ lbox_season.getSelectedIndex());
EventQueue evtQ = EventQueues.lookup("myEventQueue", EventQueues.APPLICATION, true);
//evtQ.publish(new Event("service_id", self, lbox_service.getSelectedItem().getValue().toString()));
//evtQ.publish(new Event("season_id", self, lbox_season.getSelectedItem().getValue().toString()));
evtQ.publish(new Event("service_id", self, getService_id()));
evtQ.publish(new Event("season_id", self, getSeason_id()));
//evtQ.publish(new Event("onClickRef", null, lbox_service.getSelectedItem().getValue().toString()));
//evtQ.publish(new Event("onClickRef", null, lbox_season.getSelectedItem().getValue().toString()));
/*.publish(new Event("onClickRef", null, lbox_service.getSelectedItem().getValue().toString()));
EventQueues.lookup("myEventQu", EventQueues.DESKTOP, true).publish(new Event(
"onClickRef", null, lbox_season.getSelectedItem().getValue().toString()));*/
}
else
{
setService_id("0");
setSeason_id("0");
EventQueue evtQ = EventQueues.lookup("myEventQueue", EventQueues.APPLICATION, true);
evtQ.publish(new Event("service_id", self, getService_id()));
evtQ.publish(new Event("season_id", self, getSeason_id()));
System.out.println("Service Index : "+ lbox_service.getSelectedIndex());
System.out.println("Season Index : "+ lbox_season.getSelectedIndex());
}
}
now i had publish all my value and after that my new Controller
run that will subscribe those published values. using the
below code
public void doAfterCompose(Component comp) throws Exception {
super.doAfterCompose(comp);
EventQueues.lookup("myEventQueue", EventQueues.APPLICATION, true).subscribe(new EventListener() {
public void onEvent(Event event) throws Exception {
/*String service = (String) event.getData();
logger.info("Servive $$$$$$$$$ " + service);
//String season = (String) event.getData();
//logger.info("Season $$$$$$$$$ " + season); */
if("service_id".equals(event.getName())) {
setService_id((String) event.getData());
baseController.setFilter_bar(true);
System.out.println("Service Id :" +event.getData());
}
else if("season_id".equals(event.getName())) {
setSeason_id((String) event.getData());
baseController.setFilter_bar(true);
System.out.println("Season Id :" +event.getData());
}
/*setService_id((String) event.getData());
setSeason_id((String) event.getData());*/
/*if("season_id".equals(event.getName())){
setSeason_id((String) event.getData());
}else
{
setSeason_id("0");
}*/
System.out.println("Filter bar :" +baseController.isFilter_bar());
if(baseController.isFilter_bar() == true)
{
String dateFrom = "";
String dateTo = "";
String order = "2";
List TDRetailers = verificationStoreHibernateDao.getTraditionalRetailers(
getService_id(), getSeason_id(), dateFrom, dateTo, order);
//VerificationStoreHibernateDao storeHibernateDao = new VerificationStoreHibernateDao();
//List TDRetailers = this.verificationStoreHibernateDao.getTraditionalRetailers(service_id);
//ListModel listModel = this.retailers.getModel();
ListModelList listModelList = (ListModelList) retailer.getModel();
listModelList.clear();
listModelList.addAll(TDRetailers);
baseController.setFilter_bar(true);
}
}
});
}
but actully my problem is with running the query and with
getting those published values. Based on them I will be able to
run my Traditional getTraditionalRetailers queries.
My problem is
how to publish multiple events values. Is it the right way
that I had done.
as I had done separate publish, everytime
I publish new value The query runs, the result is that i had
mutiple time query execution. for example If i will publish two
values the queries run's for the two times and if I publish
three values the query executes for three time.
I don't know what is their problem. Help me to solve my error.
The event object passed through EventQueue is where you put your payload there. You can just define an aggregate Event class and collect information and publish them in a whole.
If you can publish all information in a whole(using an aggregate Event), this is solved automatically.