5 Replies Latest reply on Jul 2, 2013 6:22 AM by fillg1

enable/disable a subsystem at Runtime ?

fillg1 Jun 18, 2013 11:24 AM

Hi folks

It is possible to disable a specific subsystem, eg. web at runtime and to (re)enable it programmatically ?

Using jboss-cli would be an option too.

Background.

We have a cluster of independend JBoss EAP 6 instances and an external hardware loadbalancer which distributes the incoming http requests. Now we want to shutdown one of the nodes gracefully, so we do not want to accept new http requests, therefore we want to close the http port (eg. 8080), but the JBoss instance itself should finish its work.

Any hints ?

1. Re: enable/disable a subsystem at Runtime ?

sfcoy Jun 19, 2013 2:23 AM (in response to fillg1)

You may find it simpler to use a firewall to temporarily block the http port to the machine.

For example, if your servers are linux based you could use iptables to do this.
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2. Re: enable/disable a subsystem at Runtime ?

erasmomarciano Jun 19, 2013 5:53 AM (in response to fillg1)

Hi

I think that you can not disable the subsystem web runtime.

But you can enable and disable in runtime your web-app.
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3. Re: enable/disable a subsystem at Runtime ?

fillg1 Jun 19, 2013 6:06 AM (in response to sfcoy)

The firewall / iptables approach is a good idea in my opinion, we can put the needed commands in a script and after the server has done its work we simply stop it.
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4. Re: enable/disable a subsystem at Runtime ?

erasmomarciano Jun 19, 2013 6:11 AM (in response to fillg1)

If you think that The firewall / iptables approach is a good idea you can make od the scripts with iptables.

exmaple :

./start_enable_http

./start_disable_http

Do you know iptables?
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5. Re: enable/disable a subsystem at Runtime ?

fillg1 Jul 2, 2013 6:22 AM (in response to fillg1)

I have found a working approach using the ServiceRegistry

serviceRegistry.getService(ServiceName.JBOSS.append("web", "connector", "http").setMode(Mode.PASSIVE)
....
serviceRegistry.getService(ServiceName.JBOSS.append("web", "connector", "http").setMode(Mode.ACTIVE)

but is there a way to get a reference to the ServiceRegistry without defining a (dummy)Service and using the value from the ServiceActivationContext ?
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