RmiServiceExporter / RmiProxyFactoryBean

[Sonic]

Hy!

Please HELP! The ServerProg is running but I have still problems with the Client.

SERVER:
<beans>
<bean id="accountService" class="de.sonic.rmi.server02.AccountServiceImpl" />
<bean class="org.springframework.remoting.rmi.RmiService Exporter">
<property name="serviceName" value="AccountService"/>
<property name="service" ref="accountService"/>
<property name="serviceInterface" value="de.sonic.rmi.server02.AccountService"/>
<property name="registryHost" value="<real IP 10...>"/>
<!-- defaults to 1099 -->
<property name="registryPort" value="1099"/>
</bean>
</beans>

public interface AccountService {
public void insertAccount(Account acc);
public List getAccounts(String name); }

public class AccountServiceImpl implements AccountService {
List accounts = new ArrayList();
public void insertAccount(Account acc) {accounts.add(acc);}
public List getAccounts(String name) {return listOfAccounts;} }

public class Account implements Serializable {
private String name;
public String getName() { return name; };
public void setName(String name) {this.name = name;}}

public static void main(String[] args) {

String codebase = "http://<IP>/rmi/Spring_RMI_Server01_02/";;
System.setProperty( "java.rmi.server.codebase", codebase );
System.setProperty( "java.security.policy", codebase+"java.policy" );
System.setSecurityManager( new RMISecurityManager() );

try {
BeanFactory bf = new ClassPathXmlApplicationContext("de/sonic/rmi/server02/asd.xml");
} catch (BeanCreationException bce) {bce.printStackTrace();}
catch (Exception e) {e.printStackTrace();}
}



CLIENT:
<bean id="simpleClient" class="de.sonic.rmi.client02.SimpleClient">
<property name="accountService">
<ref bean="accountService"/>
</property>
</bean>

<bean id="accountService" class="org.springframework.remoting.rmi.RmiProxyFa ctoryBean">
<property name="serviceUrl">
<value>rmi://<IP>:1099/AccountService</value>
</property>
<property name="serviceInterface">
<value>de.sonic.rmi.client02.AccountService</value>
</property>
</bean>

public static void main(String[] args) {
String codebase = "http://<IP>/rmi/Spring_RMI_Server01_02/";;
System.setProperty( "java.rmi.server.codebase", codebase );
System.setProperty( "java.security.policy", codebase+"java.policy" );
System.setSecurityManager( new RMISecurityManager() );

BeanFactory bf = new ClassPathXmlApplicationContext("/de/sonic/rmi/client02/client.xml");

AccountService as = (AccountService)bf.getBean("accountService");
Account a = new Account();
a.setName("Sonic");

try {as.insertAccount(a);
} catch (Exception e) {e.printStackTrace();}

}

public class SimpleClient {
private AccountService accountService;
public void setAccountService(AccountService accountService) {
this.accountService = accountService;
}

public void insertNewAccount(Account acc) {
try {accountService.insertAccount(acc);
} catch (Exception e) {e.printStackTrace();}
}

public List getAccountsByName(String name) {
return accountService.getAccounts(name);}
}

public interface AccountService {
public void insertAccount(Account acc);
public List getAccounts(String name);
}

public class Account implements Serializable {
private String name;
public String getName() { return name; };
public void setName(String name) {this.name = name;}
}


The Server is starting, but the Client throws the following Error:

java.lang.NoSuchMethodException: $Proxy0.insertAccount(de.sonic.rmi.client02.Accoun t)
at java.lang.Class.getMethod(Class.java:1581)
at org.springframework.remoting.support.RemoteInvocat ion.invoke(RemoteInvocation.java:178)
at org.springframework.remoting.support.DefaultRemote InvocationExecutor.invoke(DefaultRemoteInvocationE xecutor.java:33)
at org.springframework.remoting.support.RemoteInvocat ionBasedExporter.invoke(RemoteInvocationBasedExpor ter.java:76)
at org.springframework.remoting.rmi.RmiBasedExporter. invoke(RmiBasedExporter.java:72)
at org.springframework.remoting.rmi.RmiInvocationWrap per.invoke(RmiInvocationWrapper.java:62)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Nativ e Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Native MethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(De legatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at sun.rmi.server.UnicastServerRef.dispatch(UnicastSe rverRef.java:294)
at sun.rmi.transport.Transport$1.run(Transport.java:1 53)
at java.security.AccessController.doPrivileged(Native Method)
at sun.rmi.transport.Transport.serviceCall(Transport. java:149)
at sun.rmi.transport.tcp.TCPTransport.handleMessages( TCPTransport.java:460)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandl er.run(TCPTransport.java:701)
at java.lang.Thread.run(Thread.java:595)
at sun.rmi.transport.StreamRemoteCall.exceptionReceiv edFromServer(StreamRemoteCall.java:247)
at sun.rmi.transport.StreamRemoteCall.executeCall(Str eamRemoteCall.java:223)
at sun.rmi.server.UnicastRef.invoke(UnicastRef.java:1 26)
at org.springframework.remoting.rmi.RmiInvocationWrap per_Stub.invoke(Unknown Source)
at org.springframework.remoting.rmi.RmiClientIntercep tor.doInvoke(RmiClientInterceptor.java:347)
at org.springframework.remoting.rmi.RmiClientIntercep tor.doInvoke(RmiClientInterceptor.java:294)
at org.springframework.remoting.rmi.RmiClientIntercep tor.invoke(RmiClientInterceptor.java:209)
at org.springframework.aop.framework.ReflectiveMethod Invocation.proceed(ReflectiveMethodInvocation.java :170)
at org.springframework.aop.framework.JdkDynamicAopPro xy.invoke(JdkDynamicAopProxy.java:176)
at $Proxy0.insertAccount(Unknown Source)
at de.sonic.rmi.client02.MyRMIClient.main(MyRMIClient .java:41)

Why is the Programm searching for the Method in Account?
An Errors in the ConfigFiles? The App without Spring (only RMI) is running. I have to compare the speed of the different implementations. Hessian and HTTPInvoker will be tested later.

Thanks a lot!
Sonic

[jbalint]

Your setup looks ok. I see you have set the codebase url in the client. Are you actually doing remote code loading?

If not, are you using the same .class files for Account and the AccountService interface in both processes? From the stack trace it's evident that the server cannot match the method given by the method invocation up with the service implementation. I don't see any other reason from what you've given than a classloader issue.

Jess

[Sonic]

Hy!

First thank you for your reply!!!
I have 2 Computers. I generate the ServerCode and copy what I need to the second computer to write the Client, so the Account.class is the same. The same Files I copy to the CodeBase. I tried it with and without CodeBase in the Client, but still the same Error. In the WebServers logFile, I can see, that the Progs are getting the java.policy File and the Account.class!

Still the same ERROR! :-((

Thank you!
Sonic

[jbalint]

Well based on what you have given there shouldn't be a problem. I built and tested this on my workstation without a problem. I have attached a zip file with all the classes and test configurations that I used. You can edit the top of the build.xml and setup your classpath for the Spring jar and try to run this. If you have an additional problem reconciling the differences, let me know.

Jess

[Sonic]

Good morning!

Thank you very much for your help!
I downloaded the file and will try it out now.
Thank you!!!

[Sonic]

Hy!

Local, on one Computer, it´s working.
BUT ServerProg on one and the ClientProg on the other Computer, still the same ERROR! :-((
I think it is for Client Server programming?!?!?!

Thanks a lot for your help!

[Sonic]

It´s working! :-)) It was my mistake!
Hmmm, shame on me! :-(( What a mistake!
I did one server test package and one for the Client!
->The Account Class is in both packages.
The server interface method:
public void insertAccount(de.server.Account acc);

The client interface Method:
public void insertAccount(de.client.Account acc);

It have to be the same Package!!!

The server interface method:
public void insertAccount(de.same.package.Account acc);

The client interface Method:
public void insertAccount(de.same.package.Account acc);

Thank you all for the help!!!

[MaxVanL00N]

It´s working! :-)) It was my mistake!
Hmmm, shame on me! :-(( What a mistake!
I did one server test package and one for the Client!

Hello!
I'm trying to do the same that you did, but I dont have understood one thing.
The client side, ok, it can be a classicale webapp, packaged into one war archive. In this war I have my beans definition, client beans, I mean.

For the server side, I can make a jar archive, with all my classes, and another beans definition file???
When the server go up, how knows that must load also the beans definition that is in the jar??

I'm asking this because in the war, I have the web.xml file where I activate te SpringListener that load the beans definition, but in the jar I dont have it.

I hope you have understood my doubt

Salud

Max

[jbalint]

Max -

You will need to write something to bootstrap the server. Normally this is a simple Java class that loads the application context. There is an example of the 'main' method of this class in the thread. Find this and review it and see if it works for you.

Jess

[MaxVanL00N]

Max -

You will need to write something to bootstrap the server. Normally this is a simple Java class that loads the application context. There is an example of the 'main' method of this class in the thread. Find this and review it and see if it works for you.

Jess

Hi Jess, again me
I've found the "main class" you are speaking about but, first of all I see two similar classes, one in the front-end war, and another into the backend jar archive.
Both are mandatory?

Then I see that these classes more than loading their own applicationContext, execute this code:

String codebase = "http://<IP>/rmi/Spring_RMI_Server01_02/";;
System.setProperty( "java.rmi.server.codebase", codebase );
System.setProperty( "java.security.policy", codebase+"java.policy" );
System.setSecurityManager( new RMISecurityManager() );

What does this code do?
( Sorry for this silly question, but in RMI I'm just a newby )

At last, but of course not the least, I have my jar archive deployed on another machine, on another A.S (BEA Weblogic), when BEA starts up, how my "main" class is executed automatically??? I must execute that class declaring it in my server beans definition deployed on the client??

Any help is appreciated

Thanks a lot.

Max