Add Sentry::Cron::MonitorCheckIns module for automatic monitoring o…

…f jobs

Standard job frameworks such as `ActiveJob` and `Sidekiq` can now use this module to automatically capture check ins.

```rb
class ExampleJob < ApplicationJob
  include Sentry::Cron::MonitorCheckIns

  sentry_monitor_check_ins

  def perform(*args)
    # do stuff
  end
end
```

```rb
class SidekiqJob
  include Sidekiq::Job
  include Sentry::Cron::MonitorCheckIns

  sentry_monitor_check_ins

  def perform(*args)
    # do stuff
  end
end
```

You can pass in optional attributes to `sentry_monitor_check_ins` as follows.
```rb
sentry_monitor_check_ins slug: 'custom_slug'

sentry_monitor_check_ins monitor_config: Sentry::Cron::MonitorConfig.from_interval(1, :minute)

sentry_monitor_check_ins monitor_config: Sentry::Cron::MonitorConfig.from_crontab('5 * * * *')
```

CHANGELOG.md

@@ -4,15 +4,56 @@
 
 - Record client reports for profiles [#2107](https://github.com/getsentry/sentry-ruby/pull/2107)
 - Adopt Rails 7.1's new BroadcastLogger [#2120](https://github.com/getsentry/sentry-ruby/pull/2120)
-- Add `Sentry.capture_check_in` API for Cron Monitoring [#2117](https://github.com/getsentry/sentry-ruby/pull/2117)
+- Add [Cron Monitoring](https://docs.sentry.io/product/crons/) support
+  - Add `Sentry.capture_check_in` API for Cron Monitoring [#2117](https://github.com/getsentry/sentry-ruby/pull/2117)
 
-  You can now track progress of long running scheduled jobs.
+    You can now track progress of long running scheduled jobs.
 
-  ```rb
-  check_in_id = Sentry.capture_check_in('job_name', :in_progress)
-  # do job stuff
-  Sentry.capture_check_in('job_name', :ok, check_in_id: check_in_id)
-  ```
+    ```rb
+    check_in_id = Sentry.capture_check_in('job_name', :in_progress)
+    # do job stuff
+    Sentry.capture_check_in('job_name', :ok, check_in_id: check_in_id)
+    ```
+  - Add `Sentry::Cron::MonitorCheckIns` module for automatic monitoring of jobs [#2130](https://github.com/getsentry/sentry-ruby/pull/2130)
+
+    Standard job frameworks such as `ActiveJob` and `Sidekiq` can now use this module to automatically capture check ins.
+
+    ```rb
+    class ExampleJob < ApplicationJob
+      include Sentry::Cron::MonitorCheckIns
+
+      sentry_monitor_check_ins
+
+      def perform(*args)
+        # do stuff
+      end
+    end
+    ```
+
+    ```rb
+    class SidekiqJob
+      include Sidekiq::Job
+      include Sentry::Cron::MonitorCheckIns
+
+      sentry_monitor_check_ins
+
+      def perform(*args)
+        # do stuff
+      end
+    end
+    ```
+
+    You can pass in optional attributes to `sentry_monitor_check_ins` as follows.
+    ```rb
+    # slug defaults to the job class name
+    sentry_monitor_check_ins slug: 'custom_slug'
+
+    # define the monitor config with an interval
+    sentry_monitor_check_ins monitor_config: Sentry::Cron::MonitorConfig.from_interval(1, :minute)
+
+    # define the monitor config with a crontab
+    sentry_monitor_check_ins monitor_config: Sentry::Cron::MonitorConfig.from_crontab('5 * * * *')
+    ```
 
 ### Bug Fixes
 

sentry-rails/spec/sentry/rails/activejob_spec.rb

@@ -55,6 +55,17 @@ def rescue_callback(error)
   end
 end
 
+class NormalJobWithCron < NormalJob
+  include Sentry::Cron::MonitorCheckIns
+  sentry_monitor_check_ins
+end
+
+class FailedJobWithCron < FailedJob
+  include Sentry::Cron::MonitorCheckIns
+  sentry_monitor_check_ins slug: "failed_job", monitor_config: Sentry::Cron::MonitorConfig.from_crontab("5 * * * *")
+end
+
+
 RSpec.describe "without Sentry initialized" do
   it "runs job" do
     expect { FailedJob.perform_now }.to raise_error(FailedJob::TestError)
@@ -311,4 +322,68 @@ def perform(event, hint)
       end
     end
   end
+
+  context "with cron monitoring mixin" do
+    context "normal job" do
+      it "returns #perform method's return value" do
+        expect(NormalJobWithCron.perform_now).to eq("foo")
+      end
+
+      it "captures two check ins" do
+        NormalJobWithCron.perform_now
+
+        expect(transport.events.size).to eq(2)
+
+        first = transport.events[0]
+        check_in_id = first.check_in_id
+        expect(first).to be_a(Sentry::CheckInEvent)
+        expect(first.to_hash).to include(
+          type: 'check_in',
+          check_in_id: check_in_id,
+          monitor_slug: "NormalJobWithCron",
+          status: :in_progress
+        )
+
+        second = transport.events[1]
+        expect(second).to be_a(Sentry::CheckInEvent)
+        expect(second.to_hash).to include(
+          :duration,
+          type: 'check_in',
+          check_in_id: check_in_id,
+          monitor_slug: "NormalJobWithCron",
+          status: :ok
+        )
+      end
+    end
+
+    context "failed job" do
+      it "captures two check ins" do
+        expect { FailedJobWithCron.perform_now }.to raise_error(FailedJob::TestError)
+
+        expect(transport.events.size).to eq(3)
+
+        first = transport.events[0]
+        check_in_id = first.check_in_id
+        expect(first).to be_a(Sentry::CheckInEvent)
+        expect(first.to_hash).to include(
+          type: 'check_in',
+          check_in_id: check_in_id,
+          monitor_slug: "failed_job",
+          status: :in_progress,
+          monitor_config: { schedule: { type: :crontab, value: "5 * * * *" } }
+        )
+
+        second = transport.events[1]
+        expect(second).to be_a(Sentry::CheckInEvent)
+        expect(second.to_hash).to include(
+          :duration,
+          type: 'check_in',
+          check_in_id: check_in_id,
+          monitor_slug: "failed_job",
+          status: :error,
+          monitor_config: { schedule: { type: :crontab, value: "5 * * * *" } }
+        )
+      end
+    end
+  end
 end

sentry-ruby/lib/sentry-ruby.rb

@@ -21,6 +21,7 @@
 require "sentry/hub"
 require "sentry/background_worker"
 require "sentry/session_flusher"
+require "sentry/cron/monitor_check_ins"
 
 [
   "sentry/rake",

sentry-ruby/lib/sentry/cron/monitor_check_ins.rb

@@ -0,0 +1,61 @@
+module Sentry
+  module Cron
+    module MonitorCheckIns
+      module Patch
+        def perform(*args)
+          slug = self.class.sentry_monitor_slug || self.class.name
+          monitor_config = self.class.sentry_monitor_config
+
+          check_in_id = Sentry.capture_check_in(slug,
+                                                :in_progress,
+                                                monitor_config: monitor_config)
+
+          start = Sentry.utc_now.to_i
+          ret = super
+          duration = Sentry.utc_now.to_i - start
+
+          Sentry.capture_check_in(slug,
+                                  :ok,
+                                  check_in_id: check_in_id,
+                                  duration: duration,
+                                  monitor_config: monitor_config)
+
+          ret
+        rescue Exception
+          duration = Sentry.utc_now.to_i - start
+
+          Sentry.capture_check_in(slug,
+                                  :error,
+                                  check_in_id: check_in_id,
+                                  duration: duration,
+                                  monitor_config: monitor_config)
+
+          raise
+        end
+      end
+
+      module ClassMethods
+        def sentry_monitor_check_ins(slug: nil, monitor_config: nil)
+          @sentry_monitor_slug = slug
+          @sentry_monitor_config = monitor_config
+
+          prepend Patch
+        end
+
+        def sentry_monitor_slug
+          @sentry_monitor_slug
+        end
+
+        def sentry_monitor_config
+          @sentry_monitor_config
+        end
+      end
+
+      extend ClassMethods
+
+      def self.included(base)
+        base.extend(ClassMethods)
+      end
+    end
+  end
+end