how to restart the server (like weblogic , tomacat )by puppet ?

edit

Notify the service:

service { 'service_that_should_be_restarted':  
  ...  
}  

resource_that_will_trigger_service_restart { 'name':  
  ...  
  notify => Service['service_that_should_be_restarted'],  
}

Alternatively, you can have the service subscribed to another resource:

service { 'service_that_should_be_restarted':  
  ...  
  subscribe => Resource_that_will_trigger_service_restart['name'],  
}  

resource_that_will_trigger_service_restart { 'name':  
  ...  
}

Pls check:
https://docs.puppet.com/puppet/4.5/re...
https://docs.puppet.com/puppet/4.5/re...
https://docs.puppet.com/puppet/4.5/re...

When do you want it to restart? If it's any time puppet is run, you can run another command like the one in your previous post:

exec { 'restart-command':
  command => 'service tomcat restart',
  path => '/usr/bin/service',
}