IOException 编组 EJB 参数
IOException marshaling EJB parameters
我正在尝试从另一个 Web 应用程序（尤其是 Servlet）调用 ejb，并且两者都托管在同一个 JBoss AppServer 上。
如果我用 String/integer return-values/types 调用 ejb-methods，第一次看起来不错...
但是，如果我使用自定义 return 类型调用方法，那么我将得到 "IOException marshaling EJB parameters"，尽管自定义 class 定义在 "WEB-INF/lib/" 上可用...
我认为这是一个大问题的小问题:-(
ejb项目结构：
enter image description here
网络应用项目结构
enter image description here
远程 ejb classes 也链接到网络应用程序
远程：
package ma.remote;
import javax.ejb.Remote;
@Remote
public interface TestBeanRemote {
public DataCenter getData();
public String getStatus();
}
实施：
package ma.server;
import javax.ejb.Stateless;
import ma.remote.DataCenter;
import ma.remote.TestBeanRemote;
@Stateless
public class TestBeanImpl implements TestBeanRemote{
@Override
public DataCenter getData() {
return new DataCenter("Lasname", "fistname", "examplestreet. 505", "berlin");
}
@Override
public String getStatus() {
String ret = "EJB funktioniert";
System.out.println("public String getStatus():\n" + ret);
return ret;
}
}
自定义class:
package ma.remote;
public class DataCenter {
public String Name;
public String Vorname;
public String Adresse;
public String Stadt;
public DataCenter(String Name, String Vorname, String Adresse, String Stadt)
{
this.Name = Name;
this.Vorname = Vorname;
this.Adresse = Adresse;
this.Stadt = Stadt;
}
}
webapp 和 ejb 在 JBoss 7.1
上成功部署
14:09:03,010 INFO [org.jboss.as.server] (DeploymentScanner-threads - 1) JBAS018565: Replaced deployment "ejb-ejb.jar" with deployment "ejb-ejb.jar"
14:11:08,472 INFO [org.jboss.as.server.deployment] (MSC service thread 1-2) JBAS015877: Stopped deployment ejb-ejb.jar in 7ms
14:11:08,472 INFO [org.jboss.as.server.deployment] (MSC service thread 1-3) JBAS015876: Starting deployment of "ejb-ejb.jar"
14:11:08,487 INFO [org.jboss.as.ejb3.deployment.processors.EjbJndiBindingsDeploymentUnitProcessor] (MSC service thread 1-3) JNDI bindings for session bean named TestBeanImpl in deployment unit deployment "ejb-ejb.jar" are as follows:
java:global/ejb-ejb/TestBeanImpl!ma.remote.TestBeanRemote
java:app/ejb-ejb/TestBeanImpl!ma.remote.TestBeanRemote
java:module/TestBeanImpl!ma.remote.TestBeanRemote
java:jboss/exported/ejb-ejb/TestBeanImpl!ma.remote.TestBeanRemote
java:global/ejb-ejb/TestBeanImpl
java:app/ejb-ejb/TestBeanImpl
java:module/TestBeanImpl
14:11:08,534 INFO [org.jboss.as.server] (DeploymentScanner-threads - 1) JBAS018565: Replaced deployment "ejb-ejb.jar" with deployment "ejb-ejb.jar"
14:14:54,209 INFO [org.jboss.as.server.deployment] (MSC service thread 1-7) JBAS015877: Stopped deployment ejb-war.war in 20ms
14:14:54,209 INFO [org.jboss.as.server.deployment] (MSC service thread 1-5) JBAS015876: Starting deployment of "ejb-war.war"
14:14:54,334 INFO [org.jboss.web] (MSC service thread 1-5) JBAS018210: Registering web context: /ejb-war
14:14:54,381 INFO [org.jboss.as.server] (DeploymentScanner-threads - 1) JBAS018565: Replaced deployment "ejb-war.war" with deployment "ejb-war.war"
MyServlet 调用 ejb:
package ma.remote;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.Hashtable;
import javax.naming.InitialContext;
import javax.naming.NamingException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class ejbTester extends HttpServlet {
protected void processRequest(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html;charset=UTF-8");
try (PrintWriter out = response.getWriter()) {
/* TODO output your page here. You may use following sample code. */
out.println("<!DOCTYPE html>");
out.println("<html>");
out.println("<head>");
out.println("<title>Servlet ejbTester</title>");
out.println("</head>");
out.println("<body>");
try {
Hashtable<String, String> jndiProperties = new Hashtable<String, String>();
jndiProperties.put("java.naming.factory.url.pkgs", "org.jboss.ejb.client.naming");
InitialContext context = new InitialContext(jndiProperties);
String viewClassName = TestBeanRemote.class.getName();
TestBeanRemote fbr = (TestBeanRemote) context.lookup("ejb:ejb-ejb/TestBeanImpl!" + viewClassName);
//TestBeanRemote fbr = (TestBeanRemote) context.lookup("java:global/ejb-ejb/TestBeanImpl!" + viewClassName);
//this will be invoked correctly
String bn = fbr.getStatus();
// but this one causes an exception!
DataCenter dc = fbr.getData();
out.println("DataCenter: " + dc.Name);
out.println("message" + bn);
} catch (NamingException e)
{
System.out.println("\n EJB-Exception: \n" + e);
}
out.println("</body>");
out.println("</html>");
}
}
// <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
/**
* Handles the HTTP <code>GET</code> method.
*
* @param request servlet request
* @param response servlet response
* @throws ServletException if a servlet-specific error occurs
* @throws IOException if an I/O error occurs
*/
@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
processRequest(request, response);
}
/**
* Handles the HTTP <code>POST</code> method.
*
* @param request servlet request
* @param response servlet response
* @throws ServletException if a servlet-specific error occurs
* @throws IOException if an I/O error occurs
*/
@Override
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
processRequest(request, response);
}
/**
* Returns a short description of the servlet.
*
* @return a String containing servlet description
*/
@Override
public String getServletInfo() {
return "Short description";
}// </editor-fold>
}
调用异常：localhost:8080/ejb-war/ejbTester :
14:24:50,650 ERROR [org.apache.catalina.core.ContainerBase.[jboss.web].[default-host].[/ejb-war].[ejbTester]] (http--127.0.0.1-8080-1) Servlet.service() for servlet ejbTester threw exception: java.lang.RuntimeException: IOException marshaling EJB parameters
at org.jboss.as.ejb3.remote.LocalEjbReceiver.clone(LocalEjbReceiver.java:227) [jboss-as-ejb3-7.1.1.Final.jar:7.1.1.Final]
at org.jboss.as.ejb3.remote.LocalEjbReceiver.clone(LocalEjbReceiver.java:216) [jboss-as-ejb3-7.1.1.Final.jar:7.1.1.Final]
at org.jboss.as.ejb3.remote.LocalEjbReceiver.processInvocation(LocalEjbReceiver.java:188) [jboss-as-ejb3-7.1.1.Final.jar:7.1.1.Final]
at org.jboss.ejb.client.EJBClientInvocationContext.sendRequest(EJBClientInvocationContext.java:179) [jboss-ejb-client-1.0.5.Final.jar:1.0.5.Final]
at org.jboss.ejb.client.TransactionInterceptor.handleInvocation(TransactionInterceptor.java:43) [jboss-ejb-client-1.0.5.Final.jar:1.0.5.Final]
at org.jboss.ejb.client.EJBClientInvocationContext.sendRequest(EJBClientInvocationContext.java:181) [jboss-ejb-client-1.0.5.Final.jar:1.0.5.Final]
at org.jboss.ejb.client.ReceiverInterceptor.handleInvocation(ReceiverInterceptor.java:128) [jboss-ejb-client-1.0.5.Final.jar:1.0.5.Final]
at org.jboss.ejb.client.EJBClientInvocationContext.sendRequest(EJBClientInvocationContext.java:181) [jboss-ejb-client-1.0.5.Final.jar:1.0.5.Final]
at org.jboss.ejb.client.EJBInvocationHandler.doInvoke(EJBInvocationHandler.java:136) [jboss-ejb-client-1.0.5.Final.jar:1.0.5.Final]
at org.jboss.ejb.client.EJBInvocationHandler.doInvoke(EJBInvocationHandler.java:121) [jboss-ejb-client-1.0.5.Final.jar:1.0.5.Final]
at org.jboss.ejb.client.EJBInvocationHandler.invoke(EJBInvocationHandler.java:104) [jboss-ejb-client-1.0.5.Final.jar:1.0.5.Final]
at com.sun.proxy.$Proxy18.getData(Unknown Source)
at ma.servlets.ejbTester.processRequest(ejbTester.java:42) [classes:]
at ma.servlets.ejbTester.doGet(ejbTester.java:66) [classes:]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:734) [jboss-servlet-api_3.0_spec-1.0.0.Final.jar:1.0.0.Final]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:847) [jboss-servlet-api_3.0_spec-1.0.0.Final.jar:1.0.0.Final]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:329) [jbossweb-7.0.13.Final.jar:]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:248) [jbossweb-7.0.13.Final.jar:]
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:275) [jbossweb-7.0.13.Final.jar:]
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:161) [jbossweb-7.0.13.Final.jar:]
at org.jboss.as.web.security.SecurityContextAssociationValve.invoke(SecurityContextAssociationValve.java:153) [jboss-as-web-7.1.1.Final.jar:7.1.1.Final]
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:155) [jbossweb-7.0.13.Final.jar:]
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) [jbossweb-7.0.13.Final.jar:]
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) [jbossweb-7.0.13.Final.jar:]
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:368) [jbossweb-7.0.13.Final.jar:]
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:877) [jbossweb-7.0.13.Final.jar:]
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:671) [jbossweb-7.0.13.Final.jar:]
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:930) [jbossweb-7.0.13.Final.jar:]
at java.lang.Thread.run(Thread.java:724) [rt.jar:1.7.0_40]
Caused by: java.io.NotSerializableException: ma.remote.DataCenter
at org.jboss.marshalling.cloner.SerializingCloner.clone(SerializingCloner.java:256)
at org.jboss.marshalling.cloner.SerializingCloner.clone(SerializingCloner.java:135)
at org.jboss.as.ejb3.remote.LocalEjbReceiver.clone(LocalEjbReceiver.java:225) [jboss-as-ejb3-7.1.1.Final.jar:7.1.1.Final]
... 28 more
有人知道我的 code/structure 出了什么问题并可以帮助我吗？
谢谢！
您已经定义了一个 远程 EJB，这意味着您的目标是拥有一个分布式系统，您必须通过网络将对象传输到 不同的JVM。所以你的 POJO 必须是可序列化的，所以 ma.remote.DataCenter 必须实现 Serializable 接口。
public class DataCenter implements Serializable {
/** The serial version UID. */
private static final long serialVersionUID = 1L;
// attributes, getters and setters...
}
我正在尝试从另一个 Web 应用程序（尤其是 Servlet）调用 ejb，并且两者都托管在同一个 JBoss AppServer 上。
如果我用 String/integer return-values/types 调用 ejb-methods，第一次看起来不错... 但是，如果我使用自定义 return 类型调用方法，那么我将得到 "IOException marshaling EJB parameters"，尽管自定义 class 定义在 "WEB-INF/lib/" 上可用... 我认为这是一个大问题的小问题:-(
ejb项目结构： enter image description here 网络应用项目结构 enter image description here
远程 ejb classes 也链接到网络应用程序
远程：
package ma.remote;
import javax.ejb.Remote;
@Remote
public interface TestBeanRemote {
public DataCenter getData();
public String getStatus();
}
实施：
package ma.server;
import javax.ejb.Stateless;
import ma.remote.DataCenter;
import ma.remote.TestBeanRemote;
@Stateless
public class TestBeanImpl implements TestBeanRemote{
@Override
public DataCenter getData() {
return new DataCenter("Lasname", "fistname", "examplestreet. 505", "berlin");
}
@Override
public String getStatus() {
String ret = "EJB funktioniert";
System.out.println("public String getStatus():\n" + ret);
return ret;
}
}
自定义class:
package ma.remote;
public class DataCenter {
public String Name;
public String Vorname;
public String Adresse;
public String Stadt;
public DataCenter(String Name, String Vorname, String Adresse, String Stadt)
{
this.Name = Name;
this.Vorname = Vorname;
this.Adresse = Adresse;
this.Stadt = Stadt;
}
}
webapp 和 ejb 在 JBoss 7.1
上成功部署14:09:03,010 INFO [org.jboss.as.server] (DeploymentScanner-threads - 1) JBAS018565: Replaced deployment "ejb-ejb.jar" with deployment "ejb-ejb.jar"
14:11:08,472 INFO [org.jboss.as.server.deployment] (MSC service thread 1-2) JBAS015877: Stopped deployment ejb-ejb.jar in 7ms
14:11:08,472 INFO [org.jboss.as.server.deployment] (MSC service thread 1-3) JBAS015876: Starting deployment of "ejb-ejb.jar"
14:11:08,487 INFO [org.jboss.as.ejb3.deployment.processors.EjbJndiBindingsDeploymentUnitProcessor] (MSC service thread 1-3) JNDI bindings for session bean named TestBeanImpl in deployment unit deployment "ejb-ejb.jar" are as follows:
java:global/ejb-ejb/TestBeanImpl!ma.remote.TestBeanRemote
java:app/ejb-ejb/TestBeanImpl!ma.remote.TestBeanRemote
java:module/TestBeanImpl!ma.remote.TestBeanRemote
java:jboss/exported/ejb-ejb/TestBeanImpl!ma.remote.TestBeanRemote
java:global/ejb-ejb/TestBeanImpl
java:app/ejb-ejb/TestBeanImpl
java:module/TestBeanImpl
14:11:08,534 INFO [org.jboss.as.server] (DeploymentScanner-threads - 1) JBAS018565: Replaced deployment "ejb-ejb.jar" with deployment "ejb-ejb.jar"
14:14:54,209 INFO [org.jboss.as.server.deployment] (MSC service thread 1-7) JBAS015877: Stopped deployment ejb-war.war in 20ms
14:14:54,209 INFO [org.jboss.as.server.deployment] (MSC service thread 1-5) JBAS015876: Starting deployment of "ejb-war.war"
14:14:54,334 INFO [org.jboss.web] (MSC service thread 1-5) JBAS018210: Registering web context: /ejb-war
14:14:54,381 INFO [org.jboss.as.server] (DeploymentScanner-threads - 1) JBAS018565: Replaced deployment "ejb-war.war" with deployment "ejb-war.war"
MyServlet 调用 ejb:
package ma.remote;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.Hashtable;
import javax.naming.InitialContext;
import javax.naming.NamingException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class ejbTester extends HttpServlet {
protected void processRequest(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html;charset=UTF-8");
try (PrintWriter out = response.getWriter()) {
/* TODO output your page here. You may use following sample code. */
out.println("<!DOCTYPE html>");
out.println("<html>");
out.println("<head>");
out.println("<title>Servlet ejbTester</title>");
out.println("</head>");
out.println("<body>");
try {
Hashtable<String, String> jndiProperties = new Hashtable<String, String>();
jndiProperties.put("java.naming.factory.url.pkgs", "org.jboss.ejb.client.naming");
InitialContext context = new InitialContext(jndiProperties);
String viewClassName = TestBeanRemote.class.getName();
TestBeanRemote fbr = (TestBeanRemote) context.lookup("ejb:ejb-ejb/TestBeanImpl!" + viewClassName);
//TestBeanRemote fbr = (TestBeanRemote) context.lookup("java:global/ejb-ejb/TestBeanImpl!" + viewClassName);
//this will be invoked correctly
String bn = fbr.getStatus();
// but this one causes an exception!
DataCenter dc = fbr.getData();
out.println("DataCenter: " + dc.Name);
out.println("message" + bn);
} catch (NamingException e)
{
System.out.println("\n EJB-Exception: \n" + e);
}
out.println("</body>");
out.println("</html>");
}
}
// <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
/**
* Handles the HTTP <code>GET</code> method.
*
* @param request servlet request
* @param response servlet response
* @throws ServletException if a servlet-specific error occurs
* @throws IOException if an I/O error occurs
*/
@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
processRequest(request, response);
}
/**
* Handles the HTTP <code>POST</code> method.
*
* @param request servlet request
* @param response servlet response
* @throws ServletException if a servlet-specific error occurs
* @throws IOException if an I/O error occurs
*/
@Override
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
processRequest(request, response);
}
/**
* Returns a short description of the servlet.
*
* @return a String containing servlet description
*/
@Override
public String getServletInfo() {
return "Short description";
}// </editor-fold>
}
调用异常：localhost:8080/ejb-war/ejbTester :
14:24:50,650 ERROR [org.apache.catalina.core.ContainerBase.[jboss.web].[default-host].[/ejb-war].[ejbTester]] (http--127.0.0.1-8080-1) Servlet.service() for servlet ejbTester threw exception: java.lang.RuntimeException: IOException marshaling EJB parameters
at org.jboss.as.ejb3.remote.LocalEjbReceiver.clone(LocalEjbReceiver.java:227) [jboss-as-ejb3-7.1.1.Final.jar:7.1.1.Final]
at org.jboss.as.ejb3.remote.LocalEjbReceiver.clone(LocalEjbReceiver.java:216) [jboss-as-ejb3-7.1.1.Final.jar:7.1.1.Final]
at org.jboss.as.ejb3.remote.LocalEjbReceiver.processInvocation(LocalEjbReceiver.java:188) [jboss-as-ejb3-7.1.1.Final.jar:7.1.1.Final]
at org.jboss.ejb.client.EJBClientInvocationContext.sendRequest(EJBClientInvocationContext.java:179) [jboss-ejb-client-1.0.5.Final.jar:1.0.5.Final]
at org.jboss.ejb.client.TransactionInterceptor.handleInvocation(TransactionInterceptor.java:43) [jboss-ejb-client-1.0.5.Final.jar:1.0.5.Final]
at org.jboss.ejb.client.EJBClientInvocationContext.sendRequest(EJBClientInvocationContext.java:181) [jboss-ejb-client-1.0.5.Final.jar:1.0.5.Final]
at org.jboss.ejb.client.ReceiverInterceptor.handleInvocation(ReceiverInterceptor.java:128) [jboss-ejb-client-1.0.5.Final.jar:1.0.5.Final]
at org.jboss.ejb.client.EJBClientInvocationContext.sendRequest(EJBClientInvocationContext.java:181) [jboss-ejb-client-1.0.5.Final.jar:1.0.5.Final]
at org.jboss.ejb.client.EJBInvocationHandler.doInvoke(EJBInvocationHandler.java:136) [jboss-ejb-client-1.0.5.Final.jar:1.0.5.Final]
at org.jboss.ejb.client.EJBInvocationHandler.doInvoke(EJBInvocationHandler.java:121) [jboss-ejb-client-1.0.5.Final.jar:1.0.5.Final]
at org.jboss.ejb.client.EJBInvocationHandler.invoke(EJBInvocationHandler.java:104) [jboss-ejb-client-1.0.5.Final.jar:1.0.5.Final]
at com.sun.proxy.$Proxy18.getData(Unknown Source)
at ma.servlets.ejbTester.processRequest(ejbTester.java:42) [classes:]
at ma.servlets.ejbTester.doGet(ejbTester.java:66) [classes:]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:734) [jboss-servlet-api_3.0_spec-1.0.0.Final.jar:1.0.0.Final]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:847) [jboss-servlet-api_3.0_spec-1.0.0.Final.jar:1.0.0.Final]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:329) [jbossweb-7.0.13.Final.jar:]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:248) [jbossweb-7.0.13.Final.jar:]
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:275) [jbossweb-7.0.13.Final.jar:]
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:161) [jbossweb-7.0.13.Final.jar:]
at org.jboss.as.web.security.SecurityContextAssociationValve.invoke(SecurityContextAssociationValve.java:153) [jboss-as-web-7.1.1.Final.jar:7.1.1.Final]
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:155) [jbossweb-7.0.13.Final.jar:]
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) [jbossweb-7.0.13.Final.jar:]
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) [jbossweb-7.0.13.Final.jar:]
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:368) [jbossweb-7.0.13.Final.jar:]
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:877) [jbossweb-7.0.13.Final.jar:]
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:671) [jbossweb-7.0.13.Final.jar:]
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:930) [jbossweb-7.0.13.Final.jar:]
at java.lang.Thread.run(Thread.java:724) [rt.jar:1.7.0_40]
Caused by: java.io.NotSerializableException: ma.remote.DataCenter
at org.jboss.marshalling.cloner.SerializingCloner.clone(SerializingCloner.java:256)
at org.jboss.marshalling.cloner.SerializingCloner.clone(SerializingCloner.java:135)
at org.jboss.as.ejb3.remote.LocalEjbReceiver.clone(LocalEjbReceiver.java:225) [jboss-as-ejb3-7.1.1.Final.jar:7.1.1.Final]
... 28 more
有人知道我的 code/structure 出了什么问题并可以帮助我吗？
谢谢！
您已经定义了一个 远程 EJB，这意味着您的目标是拥有一个分布式系统，您必须通过网络将对象传输到 不同的JVM。所以你的 POJO 必须是可序列化的，所以 ma.remote.DataCenter 必须实现 Serializable 接口。
public class DataCenter implements Serializable {
/** The serial version UID. */
private static final long serialVersionUID = 1L;
// attributes, getters and setters...
}