feat(delayed job): allow to select the modules as part of the jobs na…

…me (#314)

lib/prometheus_exporter/instrumentation/delayed_job.rb

@@ -2,10 +2,10 @@
 
 module PrometheusExporter::Instrumentation
   class DelayedJob
-    JOB_CLASS_REGEXP = %r{job_class: (\w+:{0,2})+}.freeze
+    JOB_CLASS_REGEXP = %r{job_class: ((\w+:{0,2})+)}.freeze
 
     class << self
-      def register_plugin(client: nil)
+      def register_plugin(client: nil, include_module_name: false)
         instrumenter = self.new(client: client)
         return unless defined?(Delayed::Plugin)
 
@@ -15,7 +15,8 @@ def register_plugin(client: nil)
               max_attempts = Delayed::Worker.max_attempts
               enqueued_count = Delayed::Job.where(queue: job.queue).count
               pending_count = Delayed::Job.where(attempts: 0, locked_at: nil, queue: job.queue).count
-              instrumenter.call(job, max_attempts, enqueued_count, pending_count, *args, &block)
+              instrumenter.call(job, max_attempts, enqueued_count, pending_count, include_module_name,
+                                *args, &block)
             end
           end
         end
@@ -28,7 +29,7 @@ def initialize(client: nil)
       @client = client || PrometheusExporter::Client.default
     end
 
-    def call(job, max_attempts, enqueued_count, pending_count, *args, &block)
+    def call(job, max_attempts, enqueued_count, pending_count, include_module_name, *args, &block)
       success = false
       start = ::Process.clock_gettime(::Process::CLOCK_MONOTONIC)
       latency = Time.current - job.run_at
@@ -41,7 +42,7 @@ def call(job, max_attempts, enqueued_count, pending_count, *args, &block)
 
       @client.send_json(
         type: "delayed_job",
-        name: job.handler.to_s.match(JOB_CLASS_REGEXP).to_a[1].to_s,
+        name: job.handler.to_s.match(JOB_CLASS_REGEXP).to_a[include_module_name ? 1 : 2].to_s,
         queue_name: job.queue,
         success: success,
         duration: duration,

test/server/collector_test.rb

@@ -741,25 +741,25 @@ def test_it_can_collect_delayed_job_metrics
 
     current_time = Time.current
     job = Minitest::Mock.new
-    job.expect(:handler, "job_class: Class")
+    job.expect(:handler, "job_class: SomeModule::Class")
     job.expect(:queue, "my_queue")
     job.expect(:attempts, 0)
     job.expect(:run_at, current_time - 10.seconds)
 
     Time.stub(:current, current_time) do
-      instrument.call(job, 20, 10, 0, nil, "default") do
+      instrument.call(job, 20, 10, 0, true, nil, "default") do
         # nothing
       end
     end
 
     failed_job = Minitest::Mock.new
-    failed_job.expect(:handler, "job_class: Object")
+    failed_job.expect(:handler, "job_class: Module::Object")
     failed_job.expect(:queue, "my_queue")
     failed_job.expect(:attempts, 1)
     failed_job.expect(:run_at, 30.seconds.ago)
 
     begin
-      instrument.call(failed_job, 25, 10, 0, nil, "default") do
+      instrument.call(failed_job, 25, 10, 0, false, nil, "default") do
         boom
       end
     rescue
@@ -768,9 +768,9 @@ def test_it_can_collect_delayed_job_metrics
     result = collector.prometheus_metrics_text
 
     assert(result.include?("delayed_failed_jobs_total{queue_name=\"my_queue\",job_name=\"Object\"} 1"), "has failed job")
-    assert(result.include?("delayed_jobs_total{queue_name=\"my_queue\",job_name=\"Class\"} 1"), "has working job")
-    assert(result.include?("delayed_job_duration_seconds{queue_name=\"my_queue\",job_name=\"Class\"}"), "has duration")
-    assert(result.include?("delayed_job_latency_seconds_total{queue_name=\"my_queue\",job_name=\"Class\"}"), "has latency")
+    assert(result.include?("delayed_jobs_total{queue_name=\"my_queue\",job_name=\"SomeModule::Class\"} 1"), "has working job")
+    assert(result.include?("delayed_job_duration_seconds{queue_name=\"my_queue\",job_name=\"SomeModule::Class\"}"), "has duration")
+    assert(result.include?("delayed_job_latency_seconds_total{queue_name=\"my_queue\",job_name=\"SomeModule::Class\"}"), "has latency")
     assert(result.include?("delayed_jobs_enqueued{queue_name=\"my_queue\"} 10"), "has enqueued count")
     assert(result.include?("delayed_jobs_pending{queue_name=\"my_queue\"} 0"), "has pending count")
     job.verify
@@ -791,7 +791,7 @@ def test_it_can_collect_delayed_job_metrics_with_custom_labels
     job.expect(:run_at, current_time - 10.seconds)
 
     Time.stub(:current, current_time) do
-      instrument.call(job, 25, 10, 0, nil, "default") do
+      instrument.call(job, 25, 10, 0, false, nil, "default") do
         # nothing
       end
     end
@@ -802,7 +802,7 @@ def test_it_can_collect_delayed_job_metrics_with_custom_labels
     failed_job.expect(:run_at, 30.seconds.ago)
 
     begin
-      instrument.call(failed_job, 25, 10, 0, nil, "default") do
+      instrument.call(failed_job, 25, 10, 0, false, nil, "default") do
         boom
       end
     rescue
@@ -833,7 +833,7 @@ def test_it_can_collect_delayed_job_metrics_in_histogram_mode
     job.expect(:attempts, 0)
     job.expect(:run_at, 10.seconds.ago)
 
-    instrument.call(job, 20, 10, 0, nil, "default") do
+    instrument.call(job, 20, 10, 0, false, nil, "default") do
       # nothing
     end