Rails 4 ActionMailer - 使用deliver_later时如何捕获连接和SMTP错误

Question

我正在使用ActionMailer deliver_later w ActiveJobs/Sidekiq使用:

config.active_job.queue_adapter = :sidekiq

因为我在dev模式下测试了MailCatcher,我能捕到的唯一错误是Errno :: ECONNREFUSED,设置端口1026而不是1025

当我测试deliver_now时,我得到了Errno :: ECONNREFUSED错误,这很好

begin
   MessageMailer.contact_me_email(@message).deliver_now
   rescue Errno::ECONNREFUSED, Net::SMTPAuthenticationError, Net::SMTPServerBusy, Net::SMTPSyntaxError, Net::SMTPFatalError, Net::SMTPUnknownError => e
     flash[:error] = "Problems sending mail. Please try again later"
     # delete message or resend it ?
     byebug
     @message.destroy
     format.html { render :new }
   end

但是,当我请求deliver_later时,请求在sidekiq邮件程序队列中很痛,并且没有捕获错误...

       begin
   MessageMailer.contact_me_email(@message).deliver_later(wait: 1.minute ) # in mailers queue
   rescue Errno::ECONNREFUSED, Net::SMTPAuthenticationError, Net::SMTPServerBusy, Net::SMTPSyntaxError, Net::SMTPFatalError, Net::SMTPUnknownError => e
     flash[:error] = "Problems sending mail. Please try again later"
     # delete message or resend it ?
     byebug
     @message.destroy
     format.html { render :new }
   end

在这种情况下,如何从SMTP错误中捕获和解救？我想Sidekiq有责任处理它......任何暗示欢迎......

Answer 1

ActiveJobs允许您挽救使用该rescue_from方法执行作业时发生的错误.见api.您需要在ActiveJob子类中实现此方法.

由于ActionMailer使用DeliveryJobs将消息作为作业传递,因此您需要将rescue_from方法添加到此类以处理异常.

例如,您可以放入config/initializers/action_mailer.rb:

ActionMailer::DeliveryJob.rescue_from(StandardError) do |exception|
    Rails.logger.error "Original record not found: #{@serialized_arguments.join(', ')}"
end

这将彻底拯救任何StandardErrors,只需记录它们而不是引发异常.我自己实现了这个以安静Rollbar.

因为它是一个极端情况,所以测试它也是个好主意:

spec/initializers/action_mailer_spec.rb:

RSpec.describe 'ActionMailer::DeliveryJob error recovery' do

   it 'should log the deserialization errors' do
     @user = create(:user)
     MyCustomMailer.send_something(@user).deliver_later
     @user.destroy

     expect(Rails.logger).to receive(:error).at_least(:once)
     Delayed::Worker.new.work_off
   end

end