Initial version

plugins/other/delayed_jobs_queue_size

@@ -0,0 +1,58 @@
+#!/usr/bin/env ruby
+# by Helder Ribeiro 2009
+#
+# Plugin to monitor delayed_jobs' queue size
+# Gives updates with number of jobs that haven't been started yet
+# plus the ones that failed and are still rescheduled for another run
+#
+# Parameters supported:
+#
+#  config
+
+require 'rubygems'
+require 'mysql'
+require 'yaml'
+
+class Grapher
+
+  def initialize(db_conf)
+    @db_conf = db_conf
+  end
+
+  def config
+    puts <<-END_CONFIG
+graph_title Delayed_Jobs Queue Size
+graph_args -l 0
+graph_vlabel jobs to be run
+jobs.label jobs
+jobs.type GAUGE
+    END_CONFIG
+  end
+
+  def get_data
+    mysql = Mysql.new(@db_conf['host'] || 'localhost',
+                      @db_conf['username'] || 'root', @db_conf['password'], 
+                      @db_conf['database'], @db_conf['port'],
+                      @db_conf['socket'])
+    result = mysql.query("SELECT count(*) FROM delayed_jobs WHERE \
+                       first_started_at IS NULL OR run_at > NOW()")
+    value = result.fetch_hash.values.first
+    puts "jobs.value #{value}"
+  end
+
+end
+
+if __FILE__ == $0
+
+  environment = ENV['RAILS_ENV'] || 'production'
+  db_conf = YAML.load(File.read(ENV['DATABASE_YML']))[environment]
+  grapher = Grapher.new(db_conf)
+
+  case ARGV.first
+  when 'config'
+    grapher.config
+  else
+    grapher.get_data
+  end
+
+end