juplo.de Git - facebook-errors/blob - src/main/java/de/juplo/facebook/errors/FacebookErrorsSpringSocialAutoConfiguration.java

   1 package de.juplo.facebook.errors;
   2
   3
   4 import org.slf4j.Logger;
   5 import org.slf4j.LoggerFactory;
   6 import org.springframework.beans.BeansException;
   7 import org.springframework.beans.factory.BeanCreationException;
   8 import org.springframework.beans.factory.config.BeanPostProcessor;
   9 import org.springframework.boot.autoconfigure.AutoConfigureAfter;
  10 import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
  11 import org.springframework.boot.autoconfigure.social.FacebookAutoConfiguration;
  12 import org.springframework.boot.autoconfigure.web.WebMvcAutoConfiguration;
  13 import org.springframework.context.annotation.Bean;
  14 import org.springframework.context.annotation.Configuration;
  15 import org.springframework.social.facebook.api.Facebook;
  16 import org.springframework.social.facebook.api.impl.FacebookTemplate;
  17 import org.springframework.web.client.ResponseErrorHandler;
  18 import org.springframework.web.client.RestTemplate;
  19
  20
  21
  22 /**
  23  * Automatic configuration for Srping-Social-Facebook
  24  *
  25  * @author Kai Moritz
  26  */
  27 @Configuration
  28 @ConditionalOnClass(value = FacebookTemplate.class)
  29 @AutoConfigureAfter({
  30   WebMvcAutoConfiguration.class,
  31   FacebookAutoConfiguration.class
  32   })
  33 public class FacebookErrorsSpringSocialAutoConfiguration
  34 {
  35   private static final Logger LOG =
  36       LoggerFactory.getLogger(FacebookErrorsSpringSocialAutoConfiguration.class);
  37
  38
  39   @Bean
  40   static public BeanPostProcessor errorHandlerInjectorSpringSocial()
  41   {
  42     LOG.info("Configuring GraphApiErrorHandler for handling error-messages");
  43     return new BeanPostProcessor()
  44     {
  45       @Override
  46       public Object postProcessBeforeInitialization(
  47           Object bean,
  48           String beanName
  49           )
  50           throws
  51           BeansException
  52       {
  53         return bean;
  54       }
  55
  56       @Override
  57       public Object postProcessAfterInitialization(
  58           Object bean,
  59           String beanName
  60           )
  61           throws
  62           BeansException
  63       {
  64         if (bean instanceof Facebook)
  65         {
  66           try
  67           {
  68             Facebook facebook = (Facebook) bean;
  69             RestTemplate template = (RestTemplate) facebook.restOperations();
  70             ResponseErrorHandler handler = template.getErrorHandler();
  71             template.setErrorHandler(new GraphApiErrorHandler(handler));
  72             // Be sure, that the potential exception is triggered before!
  73             LOG.debug("Injecting GraphApiErrorHandler in {}", facebook);
  74           }
  75           catch (BeanCreationException e)
  76           {
  77             /**
  78              * This exception is called, if the BeanPostProcessor is called
  79              * with a scoped bean, while the according scope is not
  80              * accessible.
  81              * This happens during initialization and can safely be ignored,
  82              * because we only have to inject the handler for beans, that are
  83              * actually usable.
  84              */
  85           }
  86         }
  87
  88         return bean;
  89       }
  90     };
  91   }
  92 }