Added rake tasks for restarting resque workers.

lib/tasks/resque.rake

@@ -1,3 +1,41 @@
 require "resque/tasks"
 
-task "resque:setup" => :environment
+def run_worker(queue, count = 1)
+  puts "Starting #{count} worker(s) with QUEUE: #{queue}"
+  ops = {:pgroup => true, :err => ["log/resque_worker_foodsoft_notifier.log", "a"], 
+                          :out => ["log/resque_worker_foodsoft_notifier.log", "a"]}
+  env_vars = {"QUEUE" => queue.to_s, "PIDFILE" => "tmp/pids/resque_worker_foodsoft_notifier.pid", "VERBOSE" => "1"}
+  count.times {
+    ## Using Kernel.spawn and Process.detach because regular system() call would
+    ## cause the processes to quit when capistrano finishes
+    pid = spawn(env_vars, "rake resque:work", ops)
+    Process.detach(pid)
+  }
+end
+
+namespace :resque do
+  task :setup => :environment
+
+  desc "Restart running workers"
+  task :restart_workers do
+    Rake::Task['resque:stop_workers'].invoke
+    Rake::Task['resque:start_workers'].invoke
+  end
+  
+  desc "Quit running workers"
+  task :stop_workers do
+    pids = File.read('tmp/pids/resque_worker_foodsoft_notifier.pid').split("\n")
+    if pids.empty?
+      puts "No workers to kill"
+    else
+      syscmd = "kill -s QUIT #{pids.join(' ')}"
+      puts "Running syscmd: #{syscmd}"
+      system(syscmd)
+    end
+  end
+  
+  desc "Start workers"
+  task :start_workers do
+    run_worker("foodsoft_notifier") 
+  end
+end