deploy.rb

namespace :deploy
  desc "Restart Application serially on all servers"
  task :restart, :roles => :app do
    find_servers_for_task(current_task).each do |server|
      run "touch #{jboss_home}/standalone/deployments/#{application}-knob.yml.dodeploy", :hosts => server.host

      logger.info "Waiting for TorqueBox to finish restarting..."
      # Sleep until the app appears to be started again
      run "while ls #{jboss_home}/standalone/deployments/#{application}-knob.yml.dodeploy > /dev/null 2>&1; do sleep 1; done", :hosts => server.host
    end
  end
end