package com.zeroc.Ice not found Ice 3.7 Java Ubuntu 16.04

I have a problem in java files compilation on Ubuntu (slice2java from Slice definition was successfully generated)

The error is "package com.zeroc.Ice does not exist"

The compilation command line is " javac -d pathTo/classes -classpath /pathTo/classes:/pathTo/Ice.jar Serveur.java ClientServeurI.java Morceau.java /PathTo/generated/MP3/*.java "

All code source is in attachment

Hi,

Where did you copy/get the Ice.jar file from? Are you sure it's the Ice jar file for the new Java mapping and not the old mapping (see https://doc.zeroc.com/display/Ice37/New+Features+in+Ice+3.7#NewFeaturesinIce3.7-NewJavaMapping)?

You can check the content of the Ice.jar file with:

jar tf <path>/Ice.jar

If the classes don't start with the com/zeroc prefix, the Ice.jar file contains the Ice runtime for the old Java mapping.

Cheers,
Benoit.

The classes don't start with, could you tell me how can I do ?

Please, I'm a student and I must solve the problem

jar tf Ice.jar > log.txt

Hi Mauris,

You just need to install and use the correct ice.jar file (with a lowercase i).

One option is to use Maven Central, as described on https://doc.zeroc.com/display/Ice37/Building+Ice+Applications+in+Java.

On Ubuntu 16.04, another option is to install the libzeroc-ice3.7-java package - see https://doc.zeroc.com/display/Ice37/Using+the+Linux+Binary+Distributions.

Best regards,
Bernard

Where can I find the right ice.jar ?

I have already installed libzeroc-ice3.7-java

The ice jar files are installed into /usr/share/java. For example, the Ice 3.7.0 jar file is /usr/share/java/ice-3.7.0.jar.

Compilation command line :

javac -d /path/classes -classpath /path/classes:/usr/share/java/ice-3.7.0.jar Serveur.java ClientServeurI.java Morceau.java /path/generated/MP3/*.java

Compilation result into log25.txt, jar tf /usr/share/java/ice-3.7.0.jar into log2.txt

Please help I don't have much time

Compilation problem solved, I have a problem in trying of execute the Server (impossible of load the main class TP3.Serveur)

Execution command line : java TP3/Serveur

Source code attached

I have a problem when I execute Serveur

java Serveur

Exception in thread "main" java.lang.NoClassDefFoundError: com/zeroc/Ice/Object
at java.lang.Class.getDeclaredMethods0(Native Method)
at java.lang.Class.privateGetDeclaredMethods(Class.java:2701)
at java.lang.Class.privateGetMethodRecursive(Class.java:3048)
at java.lang.Class.getMethod0(Class.java:3018)
at java.lang.Class.getMethod(Class.java:1784)
at sun.launcher.LauncherHelper.validateMainClass(LauncherHelper.java:544 )
at sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:526)
Caused by: java.lang.ClassNotFoundException: com.zeroc.Ice.Object
at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:335)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 7 more

Please, I would like solve the problem.
I need to have a good mark for this work to valid my semester

you need to add /usr/share/java/ice-3.7.0.jar to the classpath when running the application try:

java -cp classes:/usr/share/java/ice-3.7.0.jar Serveur

Result : impossible to find or load main class Serveur

Right you need to include the package name of Serveur

java -cp classes:/usr/share/java/ice-3.7.0.jar TP3.Serveur

Result : impossible to find or load main class TP3.Serveur

If this can help, the content of the folder in which I run the command :

ClientServeurI.class Morceau.class MP3 Serveur.class TP3

Hi Mauris,

The source you upload has the following structure

source
  classes
    TP3
       Serveur.class

Try running this command from source directory

I don't find the "source" folder

The server is running, no error for the moment in execution.

Thanks you

I'am newbie with Ice, all my pure Java cod works, but I don't have tested the Ice code part yet.
If I understand it correctly, thanks to Ice work with Slice definition, the server method call mechanism is invisible ? For the client point of view, its like a simply local method call ?

I have a problem with my Python, client.

Client in attachment

A simply server connection test failed with this error :

Traceback (most recent call last):
File "client.py", line 6, in
printer = MP3.ClientServeurPrx.checkedCast(base)
File "/home/hector/Téléchargements/python/ClientServeur_ice.py", line 133, in checkedCast
return _M_MP3.ClientServeurPrx.ice_checkedCast(proxy, '::MP3::ClientServeur', facetOrContext, context)
Ice.ObjectNotExistException: exception ::Ice::ObjectNotExistException
{
id =
{
name = clientserveurAdapter
category =
}
facet =
operation = ice_isA
}

Seems you attach the wrong file

Hi Mauris,

Did you try the Ice demos? They include a build system and instructions on how to run the client and server, so it should make everything easier for you.

For this latest ObjectNotExistException error, ObjectNoExistException means the object adapter in your server could not find an object with the specified identity. The exception shows the object identity specified by your client is "clientserverAdapter". Check if this matches the identity for the target object in your server (the identity in your call to "add" on the object adapter).

Best regards,
Bernard

Python client :

import sys, Ice
import MP3

with Ice.initialize(sys.argv) as communicator:
base = communicator.stringToProxy("clientserveurAdapter:default -p 10000")
printer = MP3.ClientServeurPrx.checkedCast(base)
if not printer:
raise RuntimeError("Invalid proxy")

Java server :

package TP3;

public class Serveur {

   public static void main(String[] args) throws Exception
    {
        try(com.zeroc.Ice.Communicator communicator = com.zeroc.Ice.Util.initialize(args))
        {

            com.zeroc.Ice.ObjectAdapter adapter = communicator.createObjectAdapterWithEndpoints("clientserveurAdapter", "default -p 10000");
            com.zeroc.Ice.Object object = new ClientServeurI();
            adapter.add(object, com.zeroc.Ice.Util.stringToIdentity("clientserveur"));
            adapter.activate();
            communicator.waitForShutdown();
        }
    }

}

I can't find the problem, cloud you help ?

You are using the wrong object identity in the client proxy

base = communicator.stringToProxy("clientserveurAdapter:default -p 10000")

Should be

base = communicator.stringToProxy("clientserveur:default -p 10000")

I have a problem with my Python client

def ajouterMorceau():
global titre;
global id;
global serveur;
titre = raw_input("Veuillez entrer le nom du morceau : ");
'''resultat = serveur.getIdMorceauByTitre(titre);'''
interprete = raw_input("Veuillez entrer l'interprete : ");
genre = raw_input("Veuillez entrer le genre : ");
url = raw_input("Veuillez entrer l'URL : ");
print "Ajout morceau..."
id = serveur.addMorceau(titre)
print id
serveur.setInterpreteMorceauById(int(id),interprete)
serveur.setGenreMorceauById(id,genre)
serveur.setURLMorceauById(id,url)

Result :

Traceback (most recent call last):
File "UIclientV2.py", line 143, in
menuPrinci();
File "UIclientV2.py", line 31, in menuPrinci
ajouterMorceau();
File "UIclientV2.py", line 85, in ajouterMorceau
serveur.setInterpreteMorceauById(int(id),interprete)
File "/home/hector/Téléchargements/python/ClientServeur_ice.py", line 72, in setInterpreteMorceauById
return _M_MP3.ClientServeur._op_setInterpreteMorceauById.invoke(self, ((id, interprete), context))
Ice.UnknownException: exception ::Ice::UnknownException
{
unknown = java.lang.IndexOutOfBoundsException: Index: 1, Size: 1
at java.util.ArrayList.rangeCheck(ArrayList.java:657)
at java.util.ArrayList.get(ArrayList.java:433)
at TP3.ClientServeurI.setInterpreteMorceauById(ClientServeurI.java:43)
at MP3.ClientServeur._iceD_setInterpreteMorceauById(ClientServeur.java:113)
at MP3.ClientServeur._iceDispatch(ClientServeur.java:261)
at com.zeroc.IceInternal.Incoming.invoke(Incoming.java:226)
at com.zeroc.Ice.ConnectionI.invokeAll(ConnectionI.java:2695)
at com.zeroc.Ice.ConnectionI.dispatch(ConnectionI.java:1282)
at com.zeroc.Ice.ConnectionI.message(ConnectionI.java:1193)
at com.zeroc.IceInternal.ThreadPool.run(ThreadPool.java:416)
at com.zeroc.IceInternal.ThreadPool.access$500(ThreadPool.java:12)
at com.zeroc.IceInternal.ThreadPool$EventHandlerThread.run(ThreadPool.java:785)
at java.lang.Thread.run(Thread.java:748)

}

Problem solved, index error in Java Interface

After small debug of Java server, all the project is working, thanks a lot