Re: [sumo-user] two clients, one SUMO connection (python

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Re: [sumo-user] two clients, one SUMO connection (python - TraCI)

From: Jakob Erdmann <namdre.sumo@xxxxxxxxx>
Date: Fri, 21 Dec 2018 21:55:40 +0100
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Your code is working fine on my end.

What sumo version did you try this with?

Are your error symptoms still the same as before (***starting server on port 8813*** and nothing else happening)?

If you abort client2, what does the strack-trace say?

Am Fr., 21. Dez. 2018 um 10:28 Uhr schrieb <ratzenmeier@xxxxxx>:

i did, it didn't work out, these are my scripts:

client1:
import traci

sumoBinary = "D:\\Programme\\Eclipse\\Sumo\\bin\\sumo-gui.exe"
#sumoCmd = [sumoBinary, "-c", "D:\\Repos\\abc\\xyz\\SUMO\\config.sumo.cfg", "--num-clients", "2"]

traci.start(cmd=[sumoBinary, "-c", "D:\\Repos\\abc\\xyz\\SUMO\\config.sumo.cfg"], port=8813, label="sim1")

conn1 = traci.getConnection("sim1")

conn1.setOrder(1)

step = 0

while step < 1000:
    conn1.simulationStep()
    print("I'm client1")
    step += 1

conn1.close()
client2:
import traci

traci.init(port=8813, label="sim2")

conn2 = traci.getConnection("sim2")

conn2.setOrder(2)

step = 0

while step < 1000:
    conn2.simulationStep()
    print("I'm client2")
    step += 1

conn2.close()
my enviroment variables are set up fine.
Gesendet: Freitag, 21. Dezember 2018 um 09:58 Uhr
Von: "Jakob Erdmann" <namdre.sumo@xxxxxxxxx>
An: "Sumo project User discussions" <sumo-user@xxxxxxxxxxx>
Betreff: Re: [sumo-user] two clients, one SUMO connection (python - TraCI)
Please try the following minimal version. It only assumes that SUMO_HOME has been defined and 'sumo-gui' is on the path.
Am Fr., 21. Dez. 2018 um 09:06 Uhr schrieb <ratzenmeier@xxxxxx>:
man, still not working. I did it as you said, nothing, still the same loading thing at starting server. I also did it in like two clean scripts.

maybe in my cfg?
<?xml version="1.0" encoding="UTF-8"?>

<configuration>
  <traci_server>
    <remote-port value="8813" />
    <num-clients value="2" />
  </traci_server>
  <input>
    <net-file value="XYZ.net.xml"/>
    <additional-files value="XYZ_new_vehicles.xml, XYZ_rou.add.xml"/>
    <gui-settings-file value="settings.xml"/>
   <start value="true"/>
  </input>
  <time>
   <begin>21600</begin>
   <end>28800</end>
   <step-length>0.01</step-length>
  </time>
  <processing>
   <step-method.ballistic>true</step-method.ballistic>
  </processing>
  
  <report>
   <no-warnings>true</no-warnings>
  </report>

</configuration>
i don't know what to do more.

Thanks and greetings
Gesendet: Donnerstag, 20. Dezember 2018 um 16:18 Uhr
Von: "Benedikt Schott" <benedikt.schott@xxxxxxxx>
An: "'Sumo project User discussions'" <sumo-user@xxxxxxxxxxx>
Betreff: Re: [sumo-user] two clients, one SUMO connection (python - TraCI)
As far as I know traci.simulationStep calls simulationStep on your first connection created via traci.start, you need to also call conn2.simulationStep. Instead of calling traci.simulationStep you can get the its connection of the first client via traci.getConnection, see e.g.

traci.start(sumoCmd, port=8813, label="sim1")

conn1 = traci.getConnection("sim1")

conn1.setOrder(1)

The following snippets should work:

---------------

Client 1:

---------------

sumoBinary = "C:\\Projekte\\Sumo_Eclipse\\Releases\\sumo-win64-1.1.0\\sumo-1.1.0\\bin\\sumo-gui"

sumoCmd = [sumoBinary, "-c", cfg]

traci.start(sumoCmd, port=8813, label="sim1")

conn1 = traci.getConnection("sim1")

conn1.setOrder(1)

step = 0

while step < 1000:

    conn1.simulationStep()

    step += 1



conn1.close()

---------------

Client 2:

---------------

traci.init(port=8813, label="sim2")

conn2 = traci.getConnection("sim2")

conn2.setOrder(2)

step = 0

while step < 1000:

    conn2.simulationStep()

    step += 1

conn2.close()

Von: sumo-user-bounces@xxxxxxxxxxx [mailto:sumo-user-bounces@xxxxxxxxxxx] Im Auftrag von ratzenmeier@xxxxxx
Gesendet: Donnerstag, 20. Dezember 2018 15:37
An: sumo-user@xxxxxxxxxxx
Betreff: Re: [sumo-user] two clients, one SUMO connection (python - TraCI)
okey, still not working, here are my to client-snippets:

client1:
# default port
PORT = 8813
 
client2 = Com()
 
class runner:
 
    port = getFreeSocketPort()
    # if getFreeSocketPort returns None, initialize with default value
    if not port:
        port = PORT
    sumoBinary = "sumo-gui.exe"
 
    # starting sumo
    traci.start(cmd=[sumoBinary, "-c", "pathToConfig\\SUMO\\config.sumo.cfg", "--num-clients", "2"], port=8813)
    # establishing client order
    traci.setOrder(1)
client2:
# default port
PORT = 8813
 
class Com:
 
    def traci_client2(self):
 
        port = getFreeSocketPort()
        # if getFreeSocketPort returns None, initialize with default value
        if not port:
            port = PORT
 
        traci.init(port=8813, label="sim2")
        conn2 = traci.getConnection("sim2")
        conn2.setOrder(2)
 
        while traci.simulation.getMinExpectedNumber() > 0:
 
            traci.simulationStep()
so, as far as i understand, it stucks while it loads because sumo is waiting for client2?

Maybe you can see anything in my code.

Thanks and greetings
Gesendet: Donnerstag, 20. Dezember 2018 um 15:13 Uhr
Von: "Benedikt Schott" <benedikt.schott@xxxxxxxx>
An: "'Sumo project User discussions'" <sumo-user@xxxxxxxxxxx>
Betreff: Re: [sumo-user] two clients, one SUMO connection (python - TraCI)

When the sumo gui has been started, it is waiting for the second client to connect. Note that you have to call setOrder for all clients and to call simulationStep for each client to proceed with the simulation

e.g. for the second client:

traci.init(port=xxxx, label="sim2")

conn2 = traci.getConnection("sim2")

conn2.setOrder(2)

step = 0

while step < 1000:

conn2.simulationStep()

step += 1

conn2.close()

Von: sumo-user-bounces@xxxxxxxxxxx [mailto:sumo-user-bounces@xxxxxxxxxxx] Im Auftrag von ratzenmeier@xxxxxx
Gesendet: Donnerstag, 20. Dezember 2018 14:22
An: sumo-user@xxxxxxxxxxx
Betreff: Re: [sumo-user] two clients, one SUMO connection (python - TraCI)

thanks for the information Jakob!

So I implemented it, but when I start my runner script, it opens my sumo-gui as usually, but it's only displaying "starting server on port xxxx" and nothing happens, just loading. When I'm changing the --num-clients in the traci.start to "1" it starts normally.

Any ideas?

Greetings

Gesendet: Donnerstag, 20. Dezember 2018 um 11:31 Uhr
Von: "Jakob Erdmann" <namdre.sumo@xxxxxxxxx>
An: "Sumo project User discussions" <sumo-user@xxxxxxxxxxx>
Betreff: Re: [sumo-user] two clients, one SUMO connection (python - TraCI)

see http://sumo.dlr.de/wiki/TraCI/Interfacing_TraCI_from_Python#Controlling_the_same_simulation_from_multiple_clients

Am Do., 20. Dez. 2018 um 10:52 Uhr schrieb <ratzenmeier@xxxxxx>:

Hello everyone,

so i'm new to SUMO and want to connect two different clients (both python scripts, Interface: TraCI) to the same SUMO connection.

How can I do that exactly? I read about the simulationSteps from the post yesterday, but I can't manage to implement it.

Thanks a lot.

Greetings!

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References:
- [sumo-user] two clients, one SUMO connection (python - TraCI)
  - From: ratzenmeier
- Re: [sumo-user] two clients, one SUMO connection (python - TraCI)
  - From: Jakob Erdmann
- Re: [sumo-user] two clients, one SUMO connection (python - TraCI)
  - From: ratzenmeier
- Re: [sumo-user] two clients, one SUMO connection (python - TraCI)
  - From: Benedikt Schott
- Re: [sumo-user] two clients, one SUMO connection (python - TraCI)
  - From: ratzenmeier
- Re: [sumo-user] two clients, one SUMO connection (python - TraCI)
  - From: Benedikt Schott
- Re: [sumo-user] two clients, one SUMO connection (python - TraCI)
  - From: ratzenmeier
- Re: [sumo-user] two clients, one SUMO connection (python - TraCI)
  - From: Jakob Erdmann
- Re: [sumo-user] two clients, one SUMO connection (python - TraCI)
  - From: ratzenmeier

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