My Installation details :


VERSION: jdk6.0 update 11, aglets-2.0.2
OS: Windows XP Professional, Service Pack 2
Installation Path : JAVA : F:\Java\
AGLETS: F:\Java\aglets\

ENVIRONEMENT VARIABLES :

AGLETS_EXPORT_PATH : F:\Java\aglets\public;
AGLETS_HOME: F:\Java\aglets;
AGLETS_PATH: F:\Java\aglets;F:\Java\aglets\public;
CLASSPATH:
F:\Java\aglets\lib\aglets-2.0.2.jar;
F:\Java\aglets\public;
F:\Java\jdk6.0\jre\lib\rt.jar;

HI,
The problem is due to serialization. As I see in your code you have encountered a FileNotFoundException. With this I can predict that you are trying to serialize an object of type String[] or either Vector in to a file. Please confirm whether String[] is a serializable object or not and also if you are using Enumeration for Vectors, Then you get the "Internal Error" Since Enumeration is not serialized and if you try to display the contents of Vector using Enumeration you encounter this error.

The alternate solution is to use ArrayList of Strings. and ArrayList is serialized.

The FileNotFoundException may be due to the reason that, You are using a FileInputStream in which you are just passing the string for example, FileInputStream fins = new FileInputStream("sample.txt"), here sample.txt is considered as String not a File Object. and sample.txt has not got any physical existence. And you may be trying to serialize the String or Vector Object in to this sample.txt. So you are getting code=400
which indicates code or file not found exception.

If you can provide your code or explain your problem in brief, I can look in to the exact problem

I encountered that problem when I modeled the following concept

�There are two agents Parent Agent and Child Agent � ParentAgent creates the ChildAgent giving its proxy as an argument and then dispatch it to the Remote Context(atp://localhost:2000). In the Remote Context the child agent would have to print the details of the Parent Proxy.�


I hereby ignores the import statements to keep it simple...

Here is that source code..
Parent.java

public class Parent extends Aglet {
public void run() {
AgletContext context = getAgletContext();
AgletProxy parentProxy = getProxy();
try {
AgletProxy childProxy = context.createAglet(null, "Child", parentProxy);
childProxy.dispatch(new URL("atp://localhost:2000"));
} catch (Exception e) {
System.out.println(e.toString());
}
}
}

Child.java

public class Child extends Aglet {

AgletProxy parentProxy = null;

public void onCreation(Object init) {
parentProxy = (AgletProxy) init;
addMobilityListener( new MobilityAdapter(){
public void onArrival(MobilityEvent me) {
System.out.println("ParentProxy : " + parentProxy.toString());;
}
});
}
}

Hi, sweettam

You cannot send AgletProxy directly. The simplest way is to convert the AgletsProxy to String and then pass the string as a parameter.

Here is the code:

Parent.java

package examples.help;


import com.ibm.aglet.Aglet;
import com.ibm.aglet.AgletContext;
import com.ibm.aglet.AgletID;
import com.ibm.aglet.AgletProxy;
import java.net.URL;

public class Parent extends Aglet {
private AgletContext context;
private AgletProxy parentProxy;
private AgletID agletID;
@Override
public void run() {
try {
context = getAgletContext();
parentProxy = getProxy();
String agletProxy = parentProxy.toString();

System.out.println("The Parent Proxy is : " + parentProxy.toString());
try {
AgletProxy childProxy = context.createAglet(getCodeBase(), "examples.help.Child", agletProxy);
childProxy.dispatch(new URL("atp://localhost:2000"));
} catch (Exception e) {
System.out.println(e.toString());
}
}
catch(Exception ex)
{
ex.printStackTrace();
System.out.println("Exception!!!!");
}
}
}

Child.java

package examples.help;


import com.ibm.aglet.Aglet;
import com.ibm.aglet.event.MobilityAdapter;
import com.ibm.aglet.event.MobilityEvent;

public class Child extends Aglet {

private String parentProxy;
@Override
public void onCreation(Object init) {

parentProxy = (String)init;
addMobilityListener( new MobilityAdapter(){

@Override
public void onArrival(MobilityEvent me) {
System.out.println("ParentProxy : " +parentProxy);

}
});
}
}

I hope this solves your problem.
-Chandan

hi chandanbhosle...

I have the similar problem with sweettam. I have tried the solve that u post and succeed.
And now i have problem with itinerary aglets. i try to dispatch aglets to use itinerary function, but i've got error to run.

can u help me to solve this problem?
thanks

here my code:

Parent3.java

package madids.test;

import com.ibm.aglet.*;
import com.ibm.aglet.event.*;
import com.ibm.agletx.util.*;

public class Parent3 extends Aglet {
private AgletProxy slaveAgletProxy = null;

public void onCreation(Object init) {
try {
slaveAgletProxy = getAgletContext().createAglet(
getCodeBase(),
"madids.test.ItinerantAglet3",
this.getProxy());
} catch (Exception e) {
System.out.println(e.toString());
}
addMobilityListener(new StopDispatch());
}

public boolean handleMessage(Message msg) {
if(msg.sameKind("finished")) {
System.out.println("George says: " + msg.getArg());
return true;
}
return false;
}

class StopDispatch extends MobilityAdapter {
public void onDispatching(MobilityEvent me) {
setText("Sorry, I'm immobile. You killed me!");
try {
Thread.sleep(2000);
} catch(InterruptedException e) {}
dispose();
}
}
}


ItinerantAglet3.java

package madids.test;

import com.ibm.aglet.*;
import com.ibm.aglet.event.*;
import com.ibm.agletx.util.*;

public class ItinerantAglet3 extends Aglet {

SlaveItinerary slaveTrip = null;
AgletProxy parent = null;

public void onCreation(Object ini) {
parent = (AgletProxy) ini;
slaveTrip = new SlaveItinerary(this, "", new MyTask());

slaveTrip.addPlan("atp://localhost:9001");
slaveTrip.addPlan("atp://localhost:9002");

slaveTrip.startTrip();
}

public void run() {
if(slaveTrip.atLastDestination()) {
try {
parent.sendOnewayMessage(new Message("finished", "At last stop"));
} catch(Exception e) {
System.out.println("Message failed"+e.getMessage());
}
finally {
dispose();
}
}
}

class MyTask extends Task {
public void execute(SeqItinerary i) {
System.out.println("George was here");
}
}
}


This is my error :

> create madids.test.Parent3
> Create : madids.test.Parent3 from atp://hantuBanyoe:9000/
SeqItinerary.java(origin): atp://hantuBanyoe:9000/
***** Addr: atp://localhost:9001 place:
No integrity check because no security domain is authenticated.
java.io.IOException: FileNotFound: d:\tesis\aglets2.0.2\public\[Ljava\lang\Objec
t;.class
at com.ibm.aglets.MAFAgentSystem_AgletsImpl$1.run(MAFAgentSystem_AgletsI
mpl.java:374)
at java.security.AccessController.doPrivileged(Native Method)
at com.ibm.aglets.MAFAgentSystem_AgletsImpl.readData(MAFAgentSystem_Agle
tsImpl.java:371)
at com.ibm.aglets.MAFAgentSystem_AgletsImpl.fetch_class(MAFAgentSystem_A
gletsImpl.java:234)
at com.ibm.maf.atp.ConnectionHandler.handleFetchRequest(ConnectionHandle
r.java:533)
at com.ibm.maf.atp.ConnectionHandler.handleRequest(ConnectionHandler.jav
a:729)
at com.ibm.maf.atp.ConnectionHandler.handle(ConnectionHandler.java:390)
at com.ibm.maf.atp.ConnectionHandler.run(ConnectionHandler.java:848)
java.io.IOException: FileNotFound: d:\tesis\aglets2.0.2\public\[B.class
at com.ibm.aglets.MAFAgentSystem_AgletsImpl$1.run(MAFAgentSystem_AgletsI
mpl.java:374)
at java.security.AccessController.doPrivileged(Native Method)
at com.ibm.aglets.MAFAgentSystem_AgletsImpl.readData(MAFAgentSystem_Agle
tsImpl.java:371)
at com.ibm.aglets.MAFAgentSystem_AgletsImpl.fetch_class(MAFAgentSystem_A
gletsImpl.java:234)
at com.ibm.maf.atp.ConnectionHandler.handleFetchRequest(ConnectionHandle
r.java:533)
at com.ibm.maf.atp.ConnectionHandler.handleRequest(ConnectionHandler.jav
a:729)
at com.ibm.maf.atp.ConnectionHandler.handle(ConnectionHandler.java:390)
at com.ibm.maf.atp.ConnectionHandler.run(ConnectionHandler.java:848)
code = 400
com.ibm.maf.MAFExtendedException: INTERNAL ERROR
at com.ibm.maf.atp.MAFAgentSystem_ATPClient.receive_agent0(MAFAgentSyste
m_ATPClient.java:342)
at com.ibm.maf.atp.MAFAgentSystem_ATPClient.access$000(MAFAgentSystem_AT
PClient.java:63)
at com.ibm.maf.atp.MAFAgentSystem_ATPClient$1.run(MAFAgentSystem_ATPClie
nt.java:267)
at java.security.AccessController.doPrivileged(Native Method)
at com.ibm.maf.atp.MAFAgentSystem_ATPClient.receive_agent(MAFAgentSystem
_ATPClient.java:257)
at com.ibm.aglets.LocalAgletRef.dispatch(LocalAgletRef.java:964)
at com.ibm.aglets.LocalAgletRef.dispatch(LocalAgletRef.java:882)
at com.ibm.aglets.LocalAgletRef.dispatch(LocalAgletRef.java:1043)
at com.ibm.aglet.Aglet.dispatch(Aglet.java:192)
at com.ibm.agletx.util.SeqItinerary.goToNext(SeqItinerary.java:138)
at com.ibm.agletx.util.SeqItinerary.tryNext(SeqItinerary.java:242)
at com.ibm.agletx.util.SeqItinerary.handleTripException(SeqItinerary.jav
a:164)
at com.ibm.agletx.util.SeqItinerary.goToNext(SeqItinerary.java:143)
at com.ibm.agletx.util.SeqItinerary.startTrip(SeqItinerary.java:236)
at madids.test.ItinerantAglet3.onCreation(ItinerantAglet3.java:24)
at com.ibm.aglets.SystemMessage.handle(SystemMessage.java:125)
at com.ibm.aglets.AgletThread.run(AgletThread.java:104)
***** Addr: atp://localhost:9002 place:
No integrity check because no security domain is authenticated.
java.io.IOException: FileNotFound: d:\tesis\aglets2.0.2\public\[Ljava\lang\Objec
t;.class
at com.ibm.aglets.MAFAgentSystem_AgletsImpl$1.run(MAFAgentSystem_AgletsI
mpl.java:374)
at java.security.AccessController.doPrivileged(Native Method)
at com.ibm.aglets.MAFAgentSystem_AgletsImpl.readData(MAFAgentSystem_Agle
tsImpl.java:371)
at com.ibm.aglets.MAFAgentSystem_AgletsImpl.fetch_class(MAFAgentSystem_A
gletsImpl.java:234)
at com.ibm.maf.atp.ConnectionHandler.handleFetchRequest(ConnectionHandle
r.java:533)
at com.ibm.maf.atp.ConnectionHandler.handleRequest(ConnectionHandler.jav
a:729)
at com.ibm.maf.atp.ConnectionHandler.handle(ConnectionHandler.java:390)
at com.ibm.maf.atp.ConnectionHandler.run(ConnectionHandler.java:848)
java.io.IOException: FileNotFound: d:\tesis\aglets2.0.2\public\[B.class
at com.ibm.aglets.MAFAgentSystem_AgletsImpl$1.run(MAFAgentSystem_AgletsI
mpl.java:374)
at java.security.AccessController.doPrivileged(Native Method)
at com.ibm.aglets.MAFAgentSystem_AgletsImpl.readData(MAFAgentSystem_Agle
tsImpl.java:371)
at com.ibm.aglets.MAFAgentSystem_AgletsImpl.fetch_class(MAFAgentSystem_A
gletsImpl.java:234)
at com.ibm.maf.atp.ConnectionHandler.handleFetchRequest(ConnectionHandle
r.java:533)
at com.ibm.maf.atp.ConnectionHandler.handleRequest(ConnectionHandler.jav
a:729)
at com.ibm.maf.atp.ConnectionHandler.handle(ConnectionHandler.java:390)
at com.ibm.maf.atp.ConnectionHandler.run(ConnectionHandler.java:848)
code = 400
com.ibm.maf.MAFExtendedException: INTERNAL ERROR
at com.ibm.maf.atp.MAFAgentSystem_ATPClient.receive_agent0(MAFAgentSyste
m_ATPClient.java:342)
at com.ibm.maf.atp.MAFAgentSystem_ATPClient.access$000(MAFAgentSystem_AT
PClient.java:63)
at com.ibm.maf.atp.MAFAgentSystem_ATPClient$1.run(MAFAgentSystem_ATPClie
nt.java:267)
at java.security.AccessController.doPrivileged(Native Method)
at com.ibm.maf.atp.MAFAgentSystem_ATPClient.receive_agent(MAFAgentSystem
_ATPClient.java:257)
at com.ibm.aglets.LocalAgletRef.dispatch(LocalAgletRef.java:964)
at com.ibm.aglets.LocalAgletRef.dispatch(LocalAgletRef.java:882)
at com.ibm.aglets.LocalAgletRef.dispatch(LocalAgletRef.java:1043)
at com.ibm.aglet.Aglet.dispatch(Aglet.java:192)
at com.ibm.agletx.util.SeqItinerary.goToNext(SeqItinerary.java:138)
at com.ibm.agletx.util.SeqItinerary.tryNext(SeqItinerary.java:242)
at com.ibm.agletx.util.SeqItinerary.handleTripException(SeqItinerary.jav
a:164)
at com.ibm.agletx.util.SeqItinerary.goToNext(SeqItinerary.java:143)
at com.ibm.agletx.util.SeqItinerary.tryNext(SeqItinerary.java:242)
at com.ibm.agletx.util.SeqItinerary.handleTripException(SeqItinerary.jav
a:164)
at com.ibm.agletx.util.SeqItinerary.goToNext(SeqItinerary.java:143)
at com.ibm.agletx.util.SeqItinerary.startTrip(SeqItinerary.java:236)
at madids.test.ItinerantAglet3.onCreation(ItinerantAglet3.java:24)
at com.ibm.aglets.SystemMessage.handle(SystemMessage.java:125)
at com.ibm.aglets.AgletThread.run(AgletThread.java:104)
Create : madids.test.ItinerantAglet3 from atp://hantuBanyoe:9000/
Dispatch : Fail to dispatch madids.test.ItinerantAglet3 to atp://localhost:9001,
Integrity=DIGEST, Confidentiality=SHORTSECRETKEY, Timeout=0
Dispatch : Fail to dispatch madids.test.ItinerantAglet3 to atp://localhost:9002,
Integrity=DIGEST, Confidentiality=SHORTSECRETKEY, Timeout=0

hi chandanbhosle ,
in th above example Child.java how cn i convert the string (parentProxy) to AgletProxy

It is because of the version of Java you are using. Aglets is not compatible with Java 6.0. Try Java 5.5 or eariler versions.

plz help me out to solve this problem my mail id is prabakar128@yahoo.co.in

Anyone tell me how to solve this problem?

Someone find a solution for this problem?

@anonymous : thank u so very much for suggesting aglet does not work with java 6...thanks a lot we were able to configure aglet with java 5 after 2 full daya of getting error of com.ibm.aglet cannot be configured !! thanks a lot !! :)

hi,

I too encountered same problem wile working on Aglet Messaging, if we convert the parent proxy to string and send it to child how can the child retrive the proxy of the parent? as it has to respond back to the parent..please help

i have an urgent question,(it was asked here but nobody answered it)  i hope somebody knows the asnwer to it ,


in th above example Child.java how cn i convert the string (parentProxy) to AgletProxy  ? because in the code i am writing,  i want to get the aglet from the proxy using the .getAglet(); method

Dear All,