Move error classes to their own files so they can be loaded by Zeitwerk

Closes #313

app/models/solid_queue/process/prunable.rb

@@ -1,12 +1,6 @@
 # frozen_string_literal: true
 
 module SolidQueue
-  class ProcessPrunedError < RuntimeError
-    def initialize(last_heartbeat_at)
-      super("Process was found dead and pruned (last heartbeat at: #{last_heartbeat_at}")
-    end
-  end
-
   class Process
     module Prunable
       extend ActiveSupport::Concern
@@ -28,7 +22,7 @@ def prune
       end
 
       def prune
-        error = ProcessPrunedError.new(last_heartbeat_at)
+        error = Processes::ProcessPrunedError.new(last_heartbeat_at)
         fail_all_claimed_executions_with(error)
 
         deregister(pruned: true)

lib/solid_queue/processes/process_exit_error.rb

@@ -0,0 +1,17 @@
+# frozen_string_literal: true
+
+module SolidQueue
+  module Processes
+    class ProcessExitError < RuntimeError
+      def initialize(status)
+        message = case
+        when status.exitstatus.present? then "Process pid=#{status.pid} exited with status #{status.  exitstatus}"
+        when status.signaled? then "Process pid=#{status.pid} received unhandled signal #{status. termsig}"
+        else "Process pid=#{status.pid} exited unexpectedly"
+        end
+
+        super(message)
+      end
+    end
+  end
+end

lib/solid_queue/processes/process_missing_error.rb

@@ -0,0 +1,9 @@
+module SolidQueue
+  module Processes
+    class ProcessMissingError < RuntimeError
+      def initialize
+        super("The process that was running this job no longer exists")
+      end
+    end
+  end
+end

lib/solid_queue/processes/process_pruned_error.rb

@@ -0,0 +1,11 @@
+# frozen_string_literal: true
+
+module SolidQueue
+  module Processes
+    class ProcessPrunedError < RuntimeError
+      def initialize(last_heartbeat_at)
+        super("Process was found dead and pruned (last heartbeat at: #{last_heartbeat_at}")
+      end
+    end
+  end
+end

lib/solid_queue/supervisor/fork_supervisor.rb

@@ -1,18 +1,6 @@
 # frozen_string_literal: true
 
 module SolidQueue
-  class ProcessExitError < RuntimeError
-    def initialize(status)
-      message = case
-      when status.exitstatus.present? then "Process pid=#{status.pid} exited with status #{status.exitstatus}"
-      when status.signaled? then "Process pid=#{status.pid} received unhandled signal #{status.termsig}"
-      else "Process pid=#{status.pid} exited unexpectedly"
-      end
-
-      super(message)
-    end
-  end
-
   class Supervisor::ForkSupervisor < Supervisor
     include Signals, Pidfiled
 
@@ -126,7 +114,7 @@ def replace_fork(pid, status)
 
       def handle_claimed_jobs_by(terminated_fork, status)
         if registered_process = process.supervisees.find_by(name: terminated_fork.name)
-          error = ProcessExitError.new(status)
+          error = Processes::ProcessExitError.new(status)
           registered_process.fail_all_claimed_executions_with(error)
         end
       end

lib/solid_queue/supervisor/maintenance.rb

@@ -1,10 +1,4 @@
 module SolidQueue
-  class ProcessMissingError < RuntimeError
-    def initialize
-      super("The process that was running this job no longer exists")
-    end
-  end
-
   module Supervisor::Maintenance
     extend ActiveSupport::Concern
 
@@ -35,7 +29,7 @@ def prune_dead_processes
 
       def fail_orphaned_executions
         wrap_in_app_executor do
-          ClaimedExecution.orphaned.fail_all_with(ProcessMissingError.new)
+          ClaimedExecution.orphaned.fail_all_with(Processes::ProcessMissingError.new)
         end
       end
   end