server compliation problem

[oll3i]

when i try to compile my server i get the following errors

D:\JAVA_P~1\SIM PLE~1>javac -classpath . PhoneDirServer. java
PhoneDirServer. java:6: package PhoneDirectory does not exist
import PhoneDirectory. PhoneDirImpl;
^
.\PhoneDirImpl. java:34: class, interface, or enum expected
}
^
.\PhoneDirImpl. java:12: cannot find symbol
symbol: class PhoneDirInterfa ce
implements PhoneDirInterfa ce {
^
PhoneDirServer. java:29: cannot access PhoneDirImpl
bad class file: .\PhoneDirImpl. java
file does not contain class PhoneDirImpl
Please remove or make sure it appears in the correct subdirectory of the classpa
th.
PhoneDirImpl myObject = new PhoneDirImpl();
^
4 errors


here is my server code

 
import java.util.Properties;
import javax.naming.InitialContext;
import javax.rmi.PortableRemoteObject;

import PhoneDirectory.PhoneDirImpl; 

/**
 * Creates a Server and binds the RMI Servant with the IIOP Registry
 * 
 * 
 * 
 */
public class PhoneDirServer { 

  static final String CONTEXT_NAME = "java.naming.factory.initial";
  static final String IIOP_STRING  = "com.sun.jndi.cosnaming.CNCtxFactory";

  static final String URL_NAME = "java.naming.provider.url";
  static final String IIOP_URL_STRING  = "iiop://localhost:1000";

  /**
   * Entry Point to this application
   */
  public static void main(String[] args) { 
    try {

      // Create the Object
      PhoneDirImpl myObject = new PhoneDirImpl(); 

      // Create the IIOP Initial Context
      Properties iiopProperties = new Properties();
      iiopProperties.put( PhoneDirServer.CONTEXT_NAME, 
                          PhoneDirServer.IIOP_STRING );
      iiopProperties.put( PhoneDirServer.URL_NAME, 
                          PhoneDirServer.IIOP_URL_STRING );
      InitialContext iiopContext = new InitialContext( iiopProperties );

      // Bind the object to the IIOP registry
      iiopContext.rebind( "Phone Directory", myObject );

      System.out.println( "Hello from server, ready for action..." ); 
    }
    catch ( Exception exception ) {
      exception.printStackTrace ();
    }
  } 
}

they are all in the same directory ..
PhoneDirImpl.ja va
PhoneDirInterfa ce.java
PhoneDirServer. java

[rsrinivasan]

when i try to compile my server i get the following errors

D:\JAVA_P~1\SIM PLE~1>javac -classpath . PhoneDirServer. java
PhoneDirServer. java:6: package PhoneDirectory does not exist
import PhoneDirectory. PhoneDirImpl;
^
.\PhoneDirImpl. java:34: class, interface, or enum expected
}
^
.\PhoneDirImpl. java:12: cannot find symbol
symbol: class PhoneDirInterfa ce
implements PhoneDirInterfa ce {
^
PhoneDirServer. java:29: cannot access PhoneDirImpl
bad class file: .\PhoneDirImpl. java
file does not contain class PhoneDirImpl
Please remove or make sure it appears in the correct subdirectory of the classpa
th.
PhoneDirImpl myObject = new PhoneDirImpl();
^
4 errors


here is my server code

 
import java.util.Properties;
import javax.naming.InitialContext;
import javax.rmi.PortableRemoteObject;

import PhoneDirectory.PhoneDirImpl; 

/**
 * Creates a Server and binds the RMI Servant with the IIOP Registry
 * 
 * 
 * 
 */
public class PhoneDirServer { 

  static final String CONTEXT_NAME = "java.naming.factory.initial";
  static final String IIOP_STRING  = "com.sun.jndi.cosnaming.CNCtxFactory";

  static final String URL_NAME = "java.naming.provider.url";
  static final String IIOP_URL_STRING  = "iiop://localhost:1000";

  /**
   * Entry Point to this application
   */
  public static void main(String[] args) { 
    try {

      // Create the Object
      PhoneDirImpl myObject = new PhoneDirImpl(); 

      // Create the IIOP Initial Context
      Properties iiopProperties = new Properties();
      iiopProperties.put( PhoneDirServer.CONTEXT_NAME, 
                          PhoneDirServer.IIOP_STRING );
      iiopProperties.put( PhoneDirServer.URL_NAME, 
                          PhoneDirServer.IIOP_URL_STRING );
      InitialContext iiopContext = new InitialContext( iiopProperties );

      // Bind the object to the IIOP registry
      iiopContext.rebind( "Phone Directory", myObject );

      System.out.println( "Hello from server, ready for action..." ); 
    }
    catch ( Exception exception ) {
      exception.printStackTrace ();
    }
  } 
}

they are all in the same directory ..
PhoneDirImpl.ja va
PhoneDirInterfa ce.java
PhoneDirServer. java

Hi,
What is the problem you hava is you did not store the file in correct folder.

If all are in the same directory then create one folder "PhoneDirectory " and store the file "PhoneDirImpl.j ava" in it. And compile the file "PhoneDirImpl.j ava" which is stored in that folder. After that compile your main program. You will get the output as you expected. Do the same thing for "PhoneDirInterf ace.java".

And reply what happen...

Thanks and Regards,
Srinivasan r.

[oll3i]

D:\JAVA_P~1\SIM PLE~1\PHONED~1> javac -classpath . PhoneDirImpl.ja va
PhoneDirImpl.ja va:34: class, interface, or enum expected
}
^
1 error

[JosAH]

D:\JAVA_P~1\SIM PLE~1\PHONED~1> javac -classpath . PhoneDirImpl.ja va
PhoneDirImpl.ja va:34: class, interface, or enum expected
}
^
1 error

Good; now at least javac can find the correct source. The above is simply
a compilation error (missing brackets etc.) Learn how to read compiler error
diagnostic messages.

The compiler expected something more following that right curly brackets
which indicates that your brackets don't match properly.

kind regards,

Jos

[oll3i]

yes you are right that was a bracket (one too many)
i corrected it and now i get

D:\JAVA_P~1\SIM PLE~1\PHONED~1> javac -classpath . PhoneDirImpl.ja va
PhoneDirImpl.ja va:16: cannot find symbol
symbol: class PhoneDirInterfa ce
implements PhoneDirInterfa ce {
^
Note: PhoneDirImpl.ja va uses unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.
1 error

[r035198x]

yes you are right that was a bracket (one too many)
i corrected it and now i get

D:\JAVA_P~1\SIM PLE~1\PHONED~1> javac -classpath . PhoneDirImpl.ja va
PhoneDirImpl.ja va:16: cannot find symbol
symbol: class PhoneDirInterfa ce
implements PhoneDirInterfa ce {
^
Note: PhoneDirImpl.ja va uses unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.
1 error

Did you successfully compile PhoneDirInterfa ce first?

[oll3i]

yes i did .

[oll3i]

why it can not find it?

[r035198x]

why it can not find it?

You have

 import PhoneDirectory.PhoneDirImpl;

But you said they are in the same directory?

[oll3i]

server is in a Simple_RMI directory then
PhoneDirImpl.ja va and PhoneDirInterfa ce.java are in a subfolder of Simple_RMI which i named PhoneDirectory but i have problems now with compiling PhoneDirImpl.ja va

the server compiles .... i dont know what it means " unchecked or unsafe operations"

D:\JAVA_P~1\SIM PLE~1>javac -classpath . PhoneDirServer. java
Note: .\PhoneDirector y\PhoneDirImpl. java uses unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.

[JosAH]

server is in a Simple_RMI directory then
PhoneDirImpl.ja va and PhoneDirInterfa ce.java are in a subfolder of Simple_RMI which i named PhoneDirectory but i have problems now with compiling PhoneDirImpl.ja va

the server compiles .... i dont know what it means " unchecked or unsafe operations"

D:\JAVA_P~1\SIM PLE~1>javac -classpath . PhoneDirServer. java
Note: .\PhoneDirector y\PhoneDirImpl. java uses unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.

Unsafe operations are all about generics where you use the 'raw' class while
the method wants a generified class. On another note: do you use the directory
structure I told you about (in another thread somewhere)?

kind regards,

Jos

[oll3i]

yes
this is my second approach to rmi have two tutorials i found on the net
and two are different one implements Impl(there are methods form the interface implemented) and in the other the author adds the methods defined in the interface to the server i dont know now which way is the right one ?

[JosAH]

yes
this is my second approach to rmi have two tutorials i found on the net
and two are different one implements Impl(there are methods form the interface implemented) and in the other the author adds the methods defined in the interface to the server i dont know now which way is the right one ?

There is no single correct way: RMI is all about passing parameters over the
wire, invoking a method on the remote machine and passing return values
back again. The client just sees a 'stub' which acts as a proxy for the real
thing at the other side of the wire. The stubs are generated by the rmic compiler.

Of course the correct classes should be reachable by the local and/or remote
machine.

kind regards,

Jos

[oll3i]

i took it from a different angle i added the methods form interface to the server

import java.rmi.*;
import java.rmi.server.*;
import java.io.BufferedReader;
import java.io.FileReader;
import java.util.HashMap;
import java.util.Map;

public class PhoneDirServer extends UnicastRemoteObject
implements PhoneDirInterface {

private Map pbMap = new HashMap();

    public PhoneDirServer () throws RemoteException
    {
        super();


try {      
		BufferedReader br = new BufferedReader(new FileReader("numbers.txt"));      
		String line;      
		
		while ((line = br.readLine()) != null) 
		   {        
			String[] info = line.split(":", 2);        
			pbMap.put(info[0], info[1]);     
			}    
		} 
		catch (Exception exc) {        
	    exc.printStackTrace();        
		System.exit(1);    }
    }



public String getPhoneNumber(String name) {    
		return (String) pbMap.get(name);  }  
public boolean addPhoneNumber(String name, String num) {   
		if (pbMap.containsKey(name)) return false;    
		pbMap.put(name, num);    return true;  }  	 
public boolean replacePhoneNumber(String name, String num) {    
		if (!pbMap.containsKey(name)) return false;    
		pbMap.put(name, num);    return true;  
		}




    public static void main ( String args[] ) throws Exception
    {
        // Assign a security manager, in the event that dynamic
	// classes are loaded
        if (System.getSecurityManager() == null)
            System.setSecurityManager ( new RMISecurityManager() );

        // Create an instance of our service server ...
        PhoneDirServer server = new PhoneDirServer();

        // ... and bind it with the RMI Registry
        Naming.bind ("PhoneBook",server);

        System.out.println ("Service bound....");
    }
}

and now i get

D:\JAVA_P~1\SIM PLE~2>rmic -classpath . -iiop -idl PhoneDirServer
error: java.rmi.server .RemoteServer is not a valid remote implementation: has no
remote interfaces.
1 error

[oll3i]

i removed extends UnicastRemoteOb ject from the server
the server compiled but when i run it i get
D:\JAVA_P~1\SIM PLE~2>java PhoneDirServer
Exception in thread "main" java.rmi.Marsha lException: error marshalling argument
s; nested exception is:
java.io.NotSeri alizableExcepti on: PhoneDirServer
at sun.rmi.registr y.RegistryImpl_ Stub.bind(Unkno wn Source)
at java.rmi.Naming .bind(Naming.ja va:111)
at PhoneDirServer. main(PhoneDirSe rver.java:62)
Caused by: java.io.NotSeri alizableExcepti on: PhoneDirServer
at java.io.ObjectO utputStream.wri teObject0(Objec tOutputStream.j ava:1156)

at java.io.ObjectO utputStream.wri teObject(Object OutputStream.ja va:326)
... 3 more