[api] run some delayed jobs in special queues

* bug issue tracker job runs in extra queue to avoid that an external slow
  bugzilla server is slowin down processing all jobs
* binary tracker is doing heavy SQL load, so limit it to one job

ReleaseNotes-2.6

@@ -31,10 +31,13 @@ Features
 
  * webui handles package sources supporting project links.
 
+ * optional binary package tracking, can be used to track released packages.
+   Esp. important for maintained products.
+
 Changes on purpose:
 ===================
 
- *
+ * some delayed jobs run in seperate queues now to avoid to block other jobs
 
 Incompatible changes:
 =====================

dist/obsapidelayed

@@ -57,6 +57,8 @@ case "$1" in
     start)
 	echo -n "Starting OBS api delayed job handler "
         run_in_api script/delayed_job.api.rb start -n $NUM
+        run_in_api script/delayed_job.api.rb --queue=releasetracking start -i 1000
+        run_in_api script/delayed_job.api.rb --queue=issuetracking start -i 1010
 	rc_status -v
 	echo -n "Starting OBS api clock daemon "
         run_in_api $CLOCKWORKD -l -c config/clock.rb start

src/api/app/jobs/update_released_binaries.rb

@@ -2,6 +2,10 @@ class UpdateReleasedBinaries
 
   attr_accessor :event
 
+  def self.job_queue
+    'releasetracking'
+  end
+
   def initialize(event)
     self.event = event
   end

src/api/app/models/event/base.rb

@@ -148,7 +148,9 @@ def perform_create_jobs
       self.create_jobs.each do |job|
         eclass = job.to_s.camelize.safe_constantize
         raise "#{job.to_s.camelize} does not map to a constant" if eclass.nil?
-        eclass.new(self).delay.perform
+        queue = {}
+        queue = { :queue => eclass.job_queue } if eclass.methods.include? :job_queue
+        eclass.new(self).delay(queue).perform
       end
     end
 

src/api/lib/workers/update_issues.rb

@@ -1,5 +1,9 @@
 class UpdateIssuesJob
 
+  def self.job_queue
+    'issuetracker'
+  end
+
   def initialize
   end