[021] Symfony 4 事件监听器 Part01

作者: 观星汉 | 来源:发表于2019-03-12 19:01 被阅读0次

[021] Symfony 4 事件监听器 Part01
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MVC Framework 是离不开 EventListener 的. 简单的了解一下 Symfony 4 的事件监听机制. 非常的简单易用, 强大.

先来看一下 symfony/website-skeleton 默认的事件监听清单. 在终端里打印出来看一下:

$ bin/console debug:event-dispatcher

Console 会输出一堆 Listener, 不过编排的非常的美丽.

Registered Listeners Grouped by Event
=====================================

"console.command" event
-----------------------

 ------- ---------------------------------------------------------------------- ---------- 
  Order   Callable                                                               Priority  
 ------- ---------------------------------------------------------------------- ---------- 
  #1      Symfony\Component\HttpKernel\EventListener\DumpListener::configure()   1024      
  #2      Symfony\Bridge\Monolog\Handler\ConsoleHandler::onCommand()             255       
 ------- ---------------------------------------------------------------------- ---------- 

"console.error" event
---------------------

 ------- ----------------------------------------------------------------------------------- ---------- 
  Order   Callable                                                                            Priority  
 ------- ----------------------------------------------------------------------------------- ---------- 
  #1      Symfony\Bundle\SwiftmailerBundle\EventListener\EmailSenderListener::onException()   0         
  #2      Symfony\Bundle\MakerBundle\Event\ConsoleErrorSubscriber::onConsoleError()           0         
  #3      Symfony\Component\Console\EventListener\ErrorListener::onConsoleError()             -128      
 ------- ----------------------------------------------------------------------------------- ---------- 

"console.terminate" event
-------------------------

 ------- ----------------------------------------------------------------------------------- ---------- 
  Order   Callable                                                                            Priority  
 ------- ----------------------------------------------------------------------------------- ---------- 
  #1      Symfony\Bundle\SwiftmailerBundle\EventListener\EmailSenderListener::onTerminate()   0         
  #2      Symfony\Bundle\MakerBundle\Event\ConsoleErrorSubscriber::onConsoleTerminate()       0         
  #3      Symfony\Component\Console\EventListener\ErrorListener::onConsoleTerminate()         -128      
  #4      Symfony\Bridge\Monolog\Handler\ConsoleHandler::onTerminate()                        -255      
 ------- ----------------------------------------------------------------------------------- ---------- 

"debug.security.authorization.vote" event
-----------------------------------------

 ------- ------------------------------------------------------------------------- ---------- 
  Order   Callable                                                                  Priority  
 ------- ------------------------------------------------------------------------- ---------- 
  #1      Symfony\Bundle\SecurityBundle\EventListener\VoteListener::onVoterVote()   0         
 ------- ------------------------------------------------------------------------- ---------- 

"kernel.controller" event
-------------------------

 ------- ----------------------------------------------------------------------------------------------- ---------- 
  Order   Callable                                                                                        Priority  
 ------- ----------------------------------------------------------------------------------------------- ---------- 
  #1      Symfony\Bundle\FrameworkBundle\DataCollector\RouterDataCollector::onKernelController()          0         
  #2      Symfony\Component\HttpKernel\DataCollector\RequestDataCollector::onKernelController()           0         
  #3      Sensio\Bundle\FrameworkExtraBundle\EventListener\ControllerListener::onKernelController()       0         
  #4      Sensio\Bundle\FrameworkExtraBundle\EventListener\ParamConverterListener::onKernelController()   0         
  #5      Sensio\Bundle\FrameworkExtraBundle\EventListener\HttpCacheListener::onKernelController()        0         
  #6      Sensio\Bundle\FrameworkExtraBundle\EventListener\TemplateListener::onKernelController()         -128      
 ------- ----------------------------------------------------------------------------------------------- ---------- 

"kernel.controller_arguments" event
-----------------------------------

 ------- --------------------------------------------------------------------------------------------------- ---------- 
  Order   Callable                                                                                            Priority  
 ------- --------------------------------------------------------------------------------------------------- ---------- 
  #1      Sensio\Bundle\FrameworkExtraBundle\EventListener\SecurityListener::onKernelControllerArguments()    0         
  #2      Sensio\Bundle\FrameworkExtraBundle\EventListener\IsGrantedListener::onKernelControllerArguments()   0         
 ------- --------------------------------------------------------------------------------------------------- ---------- 

"kernel.exception" event
------------------------

 ------- ------------------------------------------------------------------------------------ ---------- 
  Order   Callable                                                                             Priority  
 ------- ------------------------------------------------------------------------------------ ---------- 
  #1      Symfony\Component\HttpKernel\EventListener\ProfilerListener::onKernelException()     0         
  #2      Symfony\Bundle\SwiftmailerBundle\EventListener\EmailSenderListener::onException()    0         
  #3      Symfony\Component\HttpKernel\EventListener\ExceptionListener::logKernelException()   0         
  #4      Symfony\Component\HttpKernel\EventListener\RouterListener::onKernelException()       -64       
  #5      Symfony\Component\HttpKernel\EventListener\ExceptionListener::onKernelException()    -128      
  #6      Symfony\Component\HttpKernel\EventListener\ExceptionListener::onKernelException()    -2048     
 ------- ------------------------------------------------------------------------------------ ---------- 

"kernel.finish_request" event
-----------------------------

 ------- ---------------------------------------------------------------------------------------- ---------- 
  Order   Callable                                                                                 Priority  
 ------- ---------------------------------------------------------------------------------------- ---------- 
  #1      Symfony\Component\HttpKernel\EventListener\LocaleListener::onKernelFinishRequest()       0         
  #2      Symfony\Component\HttpKernel\EventListener\SessionListener::onFinishRequest()            0         
  #3      Symfony\Component\HttpKernel\EventListener\TranslatorListener::onKernelFinishRequest()   0         
  #4      Symfony\Component\HttpKernel\EventListener\RouterListener::onKernelFinishRequest()       0         
  #5      Symfony\Bundle\SecurityBundle\Debug\TraceableFirewallListener::onKernelFinishRequest()   0         
 ------- ---------------------------------------------------------------------------------------- ---------- 

"kernel.request" event
----------------------

 ------- ------------------------------------------------------------------------------------------------- ---------- 
  Order   Callable                                                                                          Priority  
 ------- ------------------------------------------------------------------------------------------------- ---------- 
  #1      Symfony\Component\HttpKernel\EventListener\DebugHandlersListener::configure()                     2048      
  #2      Symfony\Component\HttpKernel\EventListener\ValidateRequestListener::onKernelRequest()             256       
  #3      Symfony\Component\HttpKernel\EventListener\SessionListener::onKernelRequest()                     128              
  #4      Symfony\Component\HttpKernel\EventListener\RouterListener::onKernelRequest()                      32        
  #5      Symfony\Bundle\FrameworkBundle\EventListener\ResolveControllerNameSubscriber::onKernelRequest()   24        
  #6      Symfony\Component\HttpKernel\EventListener\LocaleListener::onKernelRequest()                      16        
  #7      Symfony\Component\HttpKernel\EventListener\TranslatorListener::onKernelRequest()                  10        
  #8     Symfony\Bundle\SecurityBundle\Debug\TraceableFirewallListener::onKernelRequest()                  8         
 ------- ------------------------------------------------------------------------------------------------- ---------- 

"kernel.response" event
-----------------------

 ------- -------------------------------------------------------------------------------------------- ---------- 
  Order   Callable                                                                                     Priority  
 ------- -------------------------------------------------------------------------------------------- ---------- 
  #1      Symfony\Component\HttpKernel\EventListener\ResponseListener::onKernelResponse()              0         
  #2      Symfony\Component\HttpKernel\DataCollector\RequestDataCollector::onKernelResponse()          0         
  #3      Symfony\Component\WebLink\EventListener\AddLinkHeaderListener::onKernelResponse()            0         
  #4      Sensio\Bundle\FrameworkExtraBundle\EventListener\HttpCacheListener::onKernelResponse()       0         
  #5      Symfony\Component\Security\Http\RememberMe\ResponseListener::onKernelResponse()              0         
  #6      Symfony\Component\HttpKernel\EventListener\ProfilerListener::onKernelResponse()              -100      
  #7      Symfony\Bundle\WebProfilerBundle\EventListener\WebDebugToolbarListener::onKernelResponse()   -128      
  #8      Symfony\Component\HttpKernel\EventListener\SessionListener::onKernelResponse()               -1000     
  #9      Symfony\Component\HttpKernel\EventListener\StreamedResponseListener::onKernelResponse()      -1024     
 ------- -------------------------------------------------------------------------------------------- ---------- 

"kernel.terminate" event
------------------------

 ------- ----------------------------------------------------------------------------------- ---------- 
  Order   Callable                                                                            Priority  
 ------- ----------------------------------------------------------------------------------- ---------- 
  #1      Symfony\Bundle\SwiftmailerBundle\EventListener\EmailSenderListener::onTerminate()   0         
  #2      Symfony\Component\HttpKernel\EventListener\ProfilerListener::onKernelTerminate()    -1024     
 ------- ----------------------------------------------------------------------------------- ---------- 

"kernel.view" event
-------------------

 ------- ----------------------------------------------------------------------------------- ---------- 
  Order   Callable                                                                            Priority  
 ------- ----------------------------------------------------------------------------------- ---------- 
  #1      Sensio\Bundle\FrameworkExtraBundle\EventListener\TemplateListener::onKernelView()   0         
 ------- ----------------------------------------------------------------------------------- ----------

默认框架提供的事件组大概是下面的几组:

console.command
console.error
console.terminate
debug.security.authorization.vote
kernel.controller
kernel.controller_arguments
kernel.exception
kernel.finish_request
kernel.request
kernel.response
kernel.terminate
kernel.view

这其中, kernel 事件是需要重点关注的. 接下一个一个的详细来玩弄一下.

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