使用 wildfly 26 时无法使用 EJB Remote 读取响应

Question

我面临的问题是客户端无法使用 Class 实体（ETC 列表、实体）从服务器读取响应。同样对于 String、int、Double 类型的对象，它仍然可以正常工作。

EJBServer 项目

Class 实体：AnimalEntity.java

public class 动物实体 {

 private String animalName;
 private String animalCountry;
 private String animaltype;
 private double animalWeigth;

 public AnimalEntity(String animalName, String animalCountry, String animaltype, double animalWeigth) {
     super();
     this.animalName = animalName;
     this.animalCountry = animalCountry;
     this.animaltype = animaltype;
     this.animalWeigth = animalWeigth;
 }
 public String getAnimalName() {
     return animalName;
 }
 public void setAnimalName(String animalName) {
     this.animalName = animalName;
 }
 ..............

}

接口：AnimalServiceRemote.java.

import com.ejb.entity.AnimalEntity;

 public interface AnimalServiceRemote {

    public String findByName(String strName);
    public AnimalEntity Request(String strName); 
}

豆子Class:AnimalService.java

import jakarta.ejb.LocalBean;
import jakarta.ejb.Remote;
import jakarta.ejb.Stateless;

@Stateless
@LocalBean
@Remote(AnimalServiceRemote.class)
public class AnimalService implements AnimalServiceRemote {

    @Override
    public String findByName(String strName) {
        List<AnimalEntity> lst= new ArrayList<AnimalEntity>();
        AnimalEntity ani= new AnimalEntity("Dog", "Japan", "Type1", 30);
        AnimalEntity ani1= new AnimalEntity("Cat", "USA", "Type2", 150);
        AnimalEntity ani2= new AnimalEntity("Fish", "Ger", "Type3", 3);
        lst.add(ani);
        lst.add(ani1);
        lst.add(ani2);
        for (int i = 0; i < lst.size(); i++) {
            if (lst.get(i).getAnimalName().equals(strName)){
                return "Name: "+ lst.get(i).getAnimalName() +" - Country: "+ lst.get(i).getAnimalCountry() +" - Weigth: "+lst.get(i).getAnimalWeigth();
            }
        }
        
        return null;
    }

    @Override
    public AnimalEntity Request(String strName) {
        List<AnimalEntity> lst= new ArrayList<AnimalEntity>();
        AnimalEntity ani= new AnimalEntity("Dog", "Japan", "Type1", 30);
        AnimalEntity ani1= new AnimalEntity("Cat", "USA", "Type2", 150);
        AnimalEntity ani2= new AnimalEntity("Fish", "Ger", "Type3", 3);
        lst.add(ani);
        lst.add(ani1);
        lst.add(ani2);
        AnimalEntity animal= new AnimalEntity();
        for (int i = 0; i < lst.size(); i++) {
            if (lst.get(i).getAnimalName().equals(strName)){
                animal=lst.get(i);
                return animal;
            }
        }
        
        return null;
    }
}

AppClient

主要Class：Myclient.java

import javax.naming.Context;
import javax.naming.InitialContext;
import com.ejb.entity.AnimalEntity;
import com.ejb.remote.AnimalServiceRemote;

public class Myclient {

    public static void main(String[] args) {
        try {
            System.out.println("Proccessing...!" );
            // Setting Config InitContext
            Properties props = new Properties();
            props.put(Context.INITIAL_CONTEXT_FACTORY, "org.wildfly.naming.client.WildFlyInitialContextFactory");
            props.put(Context.PROVIDER_URL, "remote+http://localhost:8080");
            props.put("wildfly.naming.client.ejb.context", true);
            InitialContext ctx = new InitialContext(props);
            AnimalServiceRemote animal= (AnimalServiceRemote) ctx.lookup("ejb:/EJBServer/AnimalService!com.ejb.remote.AnimalServiceRemote");
            
            System.out.println("Lookup completeted..." );
            
            System.out.println(animal.findByName("Cat")); // => It's working normally
            
            
            AnimalEntity ani= new AnimalEntity();
            ani=animal.Request("Fish"); // => error occurs here
            
            ctx.close();
        } catch (Exception e) {
            System.out.println(e.getMessage());
        }

    }

}

with return type as String, Int, Double: it is working normally
with return type List<EntityClass>, EntityClass: it throws an error, I still don't understand why.

错误信息：

16:13:28,617 WARN  [org.jboss.ejb.client.remoting] (default task-1) EJBCLIENT000519: Exception occurred when writing EJB response to invocation 61367 over channel Channel ID 79beb44f (inbound) of Remoting connection 38289bc4 to 127.0.0.1/127.0.0.1:58770 of endpoint "desktop-sanolu2" <1d50c57e>: java.io.NotSerializableException: com.ejb.entity.AnimalEntity
    at org.jboss.marshalling.river@2.0.12.Final//org.jboss.marshalling.river.RiverMarshaller.doWriteObject(RiverMarshaller.java:274)
    at org.jboss.marshalling@2.0.12.Final//org.jboss.marshalling.AbstractObjectOutput.writeObject(AbstractObjectOutput.java:58)
    at org.jboss.marshalling@2.0.12.Final//org.jboss.marshalling.AbstractMarshaller.writeObject(AbstractMarshaller.java:111)
    at org.jboss.ejb-client@4.0.44.Final//org.jboss.ejb.protocol.remote.EJBServerChannel$RemotingInvocationRequest.writeInvocationResult(EJBServerChannel.java:986)
    at org.jboss.as.ejb3@26.1.0.Final//org.jboss.as.ejb3.remote.AssociationImpl.lambda$receiveInvocationRequest[=17=](AssociationImpl.java:291)
    at org.jboss.as.ejb3@26.1.0.Final//org.jboss.as.ejb3.remote.AssociationImpl.execute(AssociationImpl.java:344)
    at org.jboss.as.ejb3@26.1.0.Final//org.jboss.as.ejb3.remote.AssociationImpl.receiveInvocationRequest(AssociationImpl.java:297)
    at org.jboss.ejb-client@4.0.44.Final//org.jboss.ejb.protocol.remote.EJBServerChannel$ReceiverImpl.handleInvocationRequest(EJBServerChannel.java:473)
    at org.jboss.ejb-client@4.0.44.Final//org.jboss.ejb.protocol.remote.EJBServerChannel$ReceiverImpl.handleMessage(EJBServerChannel.java:208)
    at org.jboss.remoting@5.0.24.Final//org.jboss.remoting3.remote.RemoteConnectionChannel.lambda$handleMessageData(RemoteConnectionChannel.java:432)
    at org.jboss.remoting@5.0.24.Final//org.jboss.remoting3.EndpointImpl$TrackingExecutor.lambda$execute[=17=](EndpointImpl.java:991)
    at org.jboss.threads@2.4.0.Final//org.jboss.threads.ContextClassLoaderSavingRunnable.run(ContextClassLoaderSavingRunnable.java:35)
    at org.jboss.threads@2.4.0.Final//org.jboss.threads.EnhancedQueueExecutor.safeRun(EnhancedQueueExecutor.java:1990)
    at org.jboss.threads@2.4.0.Final//org.jboss.threads.EnhancedQueueExecutor$ThreadBody.doRunTask(EnhancedQueueExecutor.java:1486)
    at org.jboss.threads@2.4.0.Final//org.jboss.threads.EnhancedQueueExecutor$ThreadBody.run(EnhancedQueueExecutor.java:1377)
    at org.jboss.xnio@3.8.6.Final//org.xnio.XnioWorker$WorkerThreadFactory.run(XnioWorker.java:1280)
    at java.base/java.lang.Thread.run(Thread.java:833)
Caused by: an exception which occurred:
    in object com.ejb.entity.AnimalEntity@45251eee

请帮帮我。非常感谢

Answer 1

java.io.NotSerializableException: com.ejb.entity.AnimalEntity 说了所有你必须做的，即你需要实现 Serializable 接口：

public class AnimalEntity implements Serializable

使用 wildfly 26 时无法使用 EJB Remote 读取响应

Failed to read response with EJB Remote when using wildfly 26

java

ejb

wildfly