I'm attempting setup 2 agents(DFSearchAgent) and another agent that registers a service by type (DFRegisterAgent).
However, I cannot launch "peripheral container" or an extra container that hosts a 2nd agent.
Assumptions:
- Both containers are on the same machine therefore same IP & same port.
- JADE version 4.5.0
- Running virtualized Ubuntu on WSL (Windows)
- References: https://jade.tilab.com/documentation/examples/yellow-pages/ and https://jade.tilab.com/doc/tutorials/JADEAdmin/startJade.html
Initially, I launch DFSearchAgent and DFRegisterAgent in the same "MainController" using the JADE GUI options with steps:, right click, MainContainer , chose "Start New Agent", then selected DFSearchedAgent from the pre-packaged examples:
Console output:
INFO: ----------------------------------
This is JADE 4.5.0 - revision 6825 of 23-05-2017 10:06:04
downloaded in Open Source, under LGPL restrictions,
at http://jade.tilab.com/
----------------------------------------
May 28, 2021 2:01:59 PM jade.imtp.leap.LEAPIMTPManager initialize
INFO: Listening for intra-platform commands on address:
- jicp://137.79.225.104:1099
May 28, 2021 2:02:00 PM jade.core.BaseService init
INFO: Service jade.core.management.AgentManagement initialized
May 28, 2021 2:02:00 PM jade.core.BaseService init
INFO: Service jade.core.messaging.Messaging initialized
May 28, 2021 2:02:00 PM jade.core.BaseService init
INFO: Service jade.core.resource.ResourceManagement initialized
May 28, 2021 2:02:00 PM jade.core.BaseService init
INFO: Service jade.core.mobility.AgentMobility initialized
May 28, 2021 2:02:00 PM jade.core.BaseService init
INFO: Service jade.core.event.Notification initialized
May 28, 2021 2:02:00 PM jade.mtp.http.HTTPServer <init>
INFO: HTTP-MTP Using XML parser com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser
May 28, 2021 2:02:00 PM jade.core.messaging.MessagingService boot
INFO: MTP addresses:
http://XYZ-064067.xyz.abc.gov:7778/acc
May 28, 2021 2:02:00 PM jade.core.AgentContainerImpl joinPlatform
INFO: --------------------------------------
Agent container Main-Container@137.79.225.104 is ready.
--------------------------------------------
Agent DFRegisterAgent registering service "unknown" of type "weather-forecast
I repeated the same steps for adding the DFSearchAgent, to the same MainContainer.
Console output (Search agent was able to find a registered agent. All is good):
Agent DFSearchAgent found the following weather-forecast services:
Service "unknown" provided by agent DFRegisterAgent@137.79.225.104:1099/JADE
Now to the problem...
If I re-attempt the above steps, however with two different containers 1 MainContainer and 1 peripheral, then I get an exception (DispatcherException in remote site. No skeleton for object-id).
Attempt #1 (Using 1 Main-Container, 1 Peripheral Container, same machine) Steps:
- Remove DFSearchAgent & DFRegisterAgent from already running Main-Container
OR
Shut down old container & launch a new Main-Container via java jade.Boot -gui
Launch 2nd peripheral container via command line run:
java jade.Boot -gui -container
OR provide agent at startup
java jade.Boot -gui -container provider:examples.yellowPages.DFRegisterAgent my-forecast
Exception from console:
Exception message: Dispatcher error - Caused by: DispatcherException in remote site. No skeleton for object-id 15724561
Attempt 2 steps (using 2 Main-Containers, same machine, GUI commands):
Steps:
- Using 2 different shell/command windows, run
Run in shell #1 java jade.Boot -gui
Snippet of 1st console out:
May 28, 2021 2:50:27 PM jade.core.Runtime beginContainer
INFO: ----------------------------------
This is JADE 4.5.0 - revision 6825 of 23-05-2017 10:06:04
downloaded in Open Source, under LGPL restrictions,
at http://jade.tilab.com/
----------------------------------------
May 28, 2021 2:50:27 PM jade.imtp.leap.LEAPIMTPManager initialize
INFO: Listening for intra-platform commands on address:
- jicp://137.79.225.104:1099
Run in shell #2 java jade.Boot -gui
Snippet of 2st console out:
May 28, 2021 2:50:40 PM jade.core.Runtime beginContainer
INFO: ----------------------------------
This is JADE 4.5.0 - revision 6825 of 23-05-2017 10:06:04
downloaded in Open Source, under LGPL restrictions,
at http://jade.tilab.com/
----------------------------------------
May 28, 2021 2:50:40 PM jade.imtp.leap.LEAPIMTPManager initialize
INFO: Listening for intra-platform commands on address:
- jicp://137.79.225.104:1099
Two GUIs were launched, and there are 2 main containers.
- Using GUI add first DFRegisterAgent, then register DFSearchAgent.
1st Console:
Agent DFRegisterAgent registering service "unknown" of type "weather-forecast"
2nd Console:
Agent DFSearchAgent searching for services of type "weather-forecast" Agent DFSearchAgent did not find any weather-forecast service
Issue/Problem: Although there were not any exceptions, the search agent could not find a registered agent.
Attempt 3 steps (using 1 Main-Container & 1 peripheral container, same machine, shell commands):
Steps:
Launch the 1st Main-Container
java jade.Boot -gui
Console ouput:
May 28, 2021 3:02:15 PM jade.core.Runtime beginContainer
INFO: ----------------------------------
This is JADE 4.5.0 - revision 6825 of 23-05-2017 10:06:04
downloaded in Open Source, under LGPL restrictions,
at http://jade.tilab.com/
----------------------------------------
May 28, 2021 3:02:15 PM jade.imtp.leap.LEAPIMTPManager initialize
INFO: Listening for intra-platform commands on address:
- jicp://137.79.225.104:1099
In a new shell,attempt to launch 2nd peripheral container
java jade.Boot -gui -container
Console output:
jade.core.IMTPException: jade.core.IMTPException occurred in remote container [Main container cannot reach newly starting node [Container-1, 179334, jicp://137.79.225.104:1099]: Dispatcher error - Caused by: DispatcherException in remote site. No skeleton for object-id 179334]
Attempt 4 (via code):
I also attempt the same steps by setting up Java projects and instantiating the DFRegisterAgent and register (DFRegisterAgent in 1 MainContainer & instantiating the DFSearchAgent and register DFSearchAgent in 2 MainContainer.
Register the DFRegisterAgent:
package com.example.yellowpages;
import jade.util.leap.*;
import jade.core.Profile;
import jade.core.ProfileImpl;
import jade.wrapper.*;
/**
* Hello world!
*/
public final class App {
private App() {
}
/**
* Says hello to the world.
* @param args The arguments of the program.
*/
public static void main(String[] args) {
System.out.println( "Start test..." );
Properties pp = new Properties();
pp.setProperty(Profile.GUI, Boolean.TRUE.toString());
Profile p = new ProfileImpl(pp);
jade.wrapper.AgentContainer ac = jade.core.Runtime.instance().createMainContainer(p);
try {
ac.acceptNewAgent("DFRegisterAgent",new DFRegisterAgent()).start();
} catch (StaleProxyException e) {
throw new Error(e);
}
System.out.println( "Test is complete..." );
}
}
Register DFSearchAgent:
package com.example.yellowpages;
import jade.util.leap.*;
import jade.core.Profile;
import jade.core.ProfileImpl;
import jade.wrapper.*;
/**
* Hello world!
*/
public final class App {
private App() {
}
/**
* Says hello to the world.
* @param args The arguments of the program.
*/
public static void main(String[] args) {
System.out.println( "Start test..." );
Properties pp = new Properties();
pp.setProperty(Profile.GUI, Boolean.TRUE.toString());
Profile p = new ProfileImpl(pp);
jade.wrapper.AgentContainer ac = jade.core.Runtime.instance().createMainContainer(p);
try {
ac.acceptNewAgent("DFSearchAgent",new DFSearchAgent()).start();
ac.acceptNewAgent("DFSubscribeAgent",new DFSubscribeAgent()).start();
} catch (StaleProxyException e) {
throw new Error(e);
}
System.out.println( "Test is complete..." );
}
}
I ran 2 programs, in 2 separate shell windows (1st ran the DFRegisterAgent, then the DFSearchAgent) using:
java -cp target/demo-1.jar com.example.yellowpages.App
1st console output snippet:
Agent container Main-Container@137.79.225.104 is ready.
--------------------------------------------
Test is complete...
Agent DFRegisterAgent registering service "unknown" of type "weather-forecast"
2nd console output snippet:
INFO: --------------------------------------
Agent container Main-Container@137.79.225.104 is ready.
--------------------------------------------
Agent DFSearchAgent searching for services of type "weather-forecast"
Test is complete...
Agent DFSearchAgent did not find any weather-forecast service
Looking at the GUI, both agents were registered.
The agents cannot see each other, when the agents are registered in separate containers & I cannot launch a peripheral container as a workaround.
How can I fix the search agent to find a registered agent?
Appreciated.
