Communication between session beans

> Do you think that is possible to make this

> communication with session beans?

Yes, you can pass an EJB handle to the session bean, which should invoke first bean.

In pseudo code:

// client code

EJBObj1 obj1 = createSessionBean1();

EJBObj2 obj2 = createSessionBean2();

Handle1 h1 = obj1.getHandle();

obj2.setHandleOfFirstBean(h1); // custom method in remote interface

// session bean 2

Handle h1;

h1.getEjbObject().anyRemoteMethodOfFirstBean();

http://java.sun.com/j2ee/1.4/docs/api/javax/ejb/Handle.html

Maris_Orbidansa at 2007-7-14 0:26:08 >

Hello and thanks for you answer.

For your interest I think that you really think taht is possoble to commnunicates two session beans.

I am going to try to explain you waht i want to do:

I have just one session bean code:

I have a topology of nodes. Every node is called Subreconfigurator. i have a client called Initialiazator which starts the system and the nodes (the subreconfigurator) are going to be the session beans.An initial toplogy is load by the clientfrom a file. This initial topology is stored in a data structured in the client side. After that the client ompy this topology to every node. I dont have problems with this client - sesion bean comunication.

In this implementation phase i have to send/recieve a token throug all the topology. The token is initialized by tht initializator in one of the node and this node has to send the token to the next node and so on.Here is where i have the problem!! I obtained the previous post error when one node try to send the tokento the next one.

I write you the most importan code lines:

public class SubreconfigurationBean

implements SessionBean {

//ATRIBUTTES

ReconfiguratorTopology

private TokenExchange tokenExchange;

ReconfiguratorTopology reconfiguratorTopology;

SessionContext sessionContext;

private String nodeId;

//SOME METHODS...

public void getToken(Token token) {

System.out.println("getToken():The node that recive the token is" + this.nodeId);

tokenExchange.passingToken(token);

}

//Stupid method to send the token from the client side

public void SendToken() {

System.out.println("Stupid method to send the token from the client side" + this.nodeId);

tokenExchange.SendToken(nodeId, reconfiguratorTopology.getNodeList2());

public class TokenExchange extends SubreconfigurationBean{

//ATRIBUTES

private Token token; // Link to the token class

private boolean possessToken; // True if the SR associates a this TokenExachange class has tht token.

//METHODS

public TokenExchange() {

possessToken = false;

}

public void isEnableNextSR(){

}

public void SendToken(String nodeId, NodeList nodeList)

{

try {

System.out.println("ANTES");

//getNodeList();

System.out.println("DESPUES");

// Send the token to all the next SR(s) which are in current node (the current node is the

// node which has currently the token) connections list.

for (int j = 0; j < ((ConnectionsList)(nodeList.GetConnectionsList(nodeId))).size(); j++) {

//Check if SR j (check the connections)is enable or not.If not, dont send the token

System.out.println("Send token from "+ nodeId+ "to: " + (((ConnectionsList)(nodeList.GetConnectionsList(nodeId))).getNodeId(j)));

//missing code!!!!

//Send the token to node j.

String destine = ((ConnectionsList)(nodeList.GetConnectionsList(nodeId))).getNodeId(j);

//NodeList nl = getNodeList();

Object ad = (nodeList.GetAddress(destine));

//HERE IS WHERE MY PROGRAM CRASHES!!!!!!

((Subreconfiguration)(ad)).getToken(token);

}

// The actual token is referenced to NULL because token was pointing to

// the SR which HAD it. Now the token has been sent to the next SR(s).

token = null;

this.possessToken = false;

}

catch(Exception e) {

e.printStackTrace();

}

}

public void passingToken(Token receivedtoken)

{

System.out.println("passingToken");

token = new Token();

this.possessToken = true;

token = token.Clone(receivedtoken);

}

}

I hope that know my error is more understandable.

Thank you very much

javi_morenoa at 2007-7-14 0:26:08 >