Java Community | Help. Code. Learn.•9mo ago

Trying to set an object into a EJB Bean array from a remote app.

I am trying to set a object to an stateful EJB which has an array. If I do this in the Web container in a servlet it works fine but when I try do the same in the remote application I am getting an marshalling error Let me put the codes and more details

9 Replies

JavaBot•9mo ago

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Rag...JN 🌌 🦡 👽 💰 🐊OP•9mo ago

This is the object I am trying to insert into the Bean's List, this in a module called "core"

public class IoTDeviceReadingState implements Serializable {
    int capturedVehicleSpeed = 0;
    String capturedTrafficLightStatus = null;
    Coordinate capturedGPSCoordinates = null;

public class IoTDeviceReadingState implements Serializable {
    int capturedVehicleSpeed = 0;
    String capturedTrafficLightStatus = null;
    Coordinate capturedGPSCoordinates = null;

This is the Bean interface

@Remote
public interface IoTDeviceReadingStore extends Serializable {

    void configureBean();

    void setReading(IoTDeviceReadingState reading);

    List<IoTDeviceReadingState> getReadings();
}

@Remote
public interface IoTDeviceReadingStore extends Serializable {

    void configureBean();

    void setReading(IoTDeviceReadingState reading);

    List<IoTDeviceReadingState> getReadings();
}

Bean Implementation

@Stateful
public class IoTDeviceReadingStoreBean implements IoTDeviceReadingStore {
    private List<IoTDeviceReadingState> readings = new LinkedList<>();

    @PostConstruct
    public void configureBean(){
        this.readings = new LinkedList<>();
    }

    public void setReading(IoTDeviceReadingState reading){
        this.readings.add(reading);
    }
    public List<IoTDeviceReadingState> getReadings(){
        return readings;
    }

}

@Stateful
public class IoTDeviceReadingStoreBean implements IoTDeviceReadingStore {
    private List<IoTDeviceReadingState> readings = new LinkedList<>();

    @PostConstruct
    public void configureBean(){
        this.readings = new LinkedList<>();
    }

    public void setReading(IoTDeviceReadingState reading){
        this.readings.add(reading);
    }
    public List<IoTDeviceReadingState> getReadings(){
        return readings;
    }

}

Testing it in Servlet

            IoTDeviceReadingState state = new IoTDeviceReadingState();
            String lightStatus = "green";
            int speed = 100;
            state.captureTrafficLightStatus(lightStatus);
            state.captureVehicleSpeed(speed);

            IoTDeviceReadingStore readingStoreBean = (IoTDeviceReadingStore) context.lookup("java:global/ear/app/IoTDeviceReadingStoreBean");
            readingStoreBean.setReading(state);

            IoTDeviceReadingState state = new IoTDeviceReadingState();
            String lightStatus = "green";
            int speed = 100;
            state.captureTrafficLightStatus(lightStatus);
            state.captureVehicleSpeed(speed);

            IoTDeviceReadingStore readingStoreBean = (IoTDeviceReadingStore) context.lookup("java:global/ear/app/IoTDeviceReadingStoreBean");
            readingStoreBean.setReading(state);

No errors worked fine Trying to do this in another app

        IoTDeviceReadingState state = new IoTDeviceReadingState();
        String lightStatus = IoTDataGenerator.randomStatus();
        int speed = IoTDataGenerator.randomSpeed();
        state.captureTrafficLightStatus(lightStatus);
        state.captureVehicleSpeed(speed);

        IoTDeviceReadingStore readingStoreBean = (IoTDeviceReadingStore) context.lookup("java:global/ear/app/IoTDeviceReadingStoreBean");

        readingStoreBean.setReading(state);

        IoTDeviceReadingState state = new IoTDeviceReadingState();
        String lightStatus = IoTDataGenerator.randomStatus();
        int speed = IoTDataGenerator.randomSpeed();
        state.captureTrafficLightStatus(lightStatus);
        state.captureVehicleSpeed(speed);

        IoTDeviceReadingStore readingStoreBean = (IoTDeviceReadingStore) context.lookup("java:global/ear/app/IoTDeviceReadingStoreBean");

        readingStoreBean.setReading(state);

Rag...JN 🌌 🦡 👽 💰 🐊OP•9mo ago

The error I am getting is

Rag...JN 🌌 🦡 👽 💰 🐊OP•9mo ago

Exception in thread "main" jakarta.ejb.EJBException: java.rmi.MarshalException: CORBA MARSHAL 1330446347 Maybe; nested exception is: 
    org.omg.CORBA.MARSHAL: ----------BEGIN server-side stack trace----------
org.omg.CORBA.MARSHAL: WARNING: 00810011: Exception from readValue on ValueHandler in CDRInputStream  vmcid: OMG  minor code: 11 completed: Maybe
    at com.sun.proxy.$Proxy270.valuehandlerReadException(Unknown Source)
    at com.sun.corba.ee.impl.encoding.CDRInputStream_1_0.readRMIIIOPValueType(CDRInputStream_1_0.java:804)
    at com.sun.corba.ee.impl.encoding.CDRInputStream_1_0.read_value(CDRInputStream_1_0.java:899)
    at com.sun.corba.ee.impl.encoding.CDRInputObject.read_value

Exception in thread "main" jakarta.ejb.EJBException: java.rmi.MarshalException: CORBA MARSHAL 1330446347 Maybe; nested exception is: 
    org.omg.CORBA.MARSHAL: ----------BEGIN server-side stack trace----------
org.omg.CORBA.MARSHAL: WARNING: 00810011: Exception from readValue on ValueHandler in CDRInputStream  vmcid: OMG  minor code: 11 completed: Maybe
    at com.sun.proxy.$Proxy270.valuehandlerReadException(Unknown Source)
    at com.sun.corba.ee.impl.encoding.CDRInputStream_1_0.readRMIIIOPValueType(CDRInputStream_1_0.java:804)
    at com.sun.corba.ee.impl.encoding.CDRInputStream_1_0.read_value(CDRInputStream_1_0.java:899)
    at com.sun.corba.ee.impl.encoding.CDRInputObject.read_value

Rag...JN 🌌 🦡 👽 💰 🐊OP•9mo ago

This is the github repo https://github.com/ragujan/multi_module_java_iot_app_simulation/tree/main

GitHub

GitHub - ragujan/multi_module_java_iot_app_simulation: Getting help...

Getting help to fix some issues, it's mainly the servlet url - GitHub - ragujan/multi_module_java_iot_app_simulation: Getting help to fix some issues, it's mainly the servlet url

Rag...JN 🌌 🦡 👽 💰 🐊OP•9mo ago

how to do I change the description the description is old going to sleep now

JavaBot•9mo ago

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Rag...JN 🌌 🦡 👽 💰 🐊OP•9mo ago

Update Update Hey for some reason after I turned on my laptop I started the server in the web app (ear), then re run the remote and it didn't throw any exceptions :boohoo: :hidethepain: :boohoo: :hidethepain: skill issue

JavaBot•9mo ago

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Trying to set an object into a EJB Bean array from a remote app.