Examples of com.opensymphony.xwork2.interceptor.ExceptionMappingInterceptor

Package com.opensymphony.xwork2.interceptor

Examples of com.opensymphony.xwork2.interceptor.ExceptionMappingInterceptor

com.opensymphony.xwork2.validator.ValidationException
This interceptor forms the core functionality of the exception handling feature. Exception handling allows you to map an exception to a result code, just as if the action returned a result code instead of throwing an unexpected exception. When an exception is encountered, it is wrapped with an {@link ExceptionHolder} and pushed on the stack,providing easy access to the exception from within your result. Note: While you can configure exception mapping in your configuration file at any point, the configuration will not have any effect if this interceptor is not in the interceptor stack for your actions. It is recommended that you make this interceptor the first interceptor on the stack, ensuring that it has full access to catch any exception, even those caused by other interceptors.
Interceptor parameters:
- logEnabled (optional) - Should exceptions also be logged? (boolean true|false)
- logLevel (optional) - what log level should we use (trace, debug, info, warn, error, fatal)? - defaut is debug
- logCategory (optional) - If provided we would use this category (eg. com.mycompany.app). Default is to use com.opensymphony.xwork2.interceptor.ExceptionMappingInterceptor.
The parameters above enables us to log all thrown exceptions with stacktace in our own logfile, and present a friendly webpage (with no stacktrace) to the end user.
Extending the interceptor:
If you want to add custom handling for publishing the Exception, you may override {@link #publishException(com.opensymphony.xwork2.ActionInvocation,ExceptionHolder)}. The default implementation pushes the given ExceptionHolder on value stack. A custom implementation could add additional logging etc.
Example code:
```
  <xwork> <package name="default" extends="xwork-default"> <global-results> <result name="error" type="freemarker">error.ftl</result> </global-results> <global-exception-mappings> <exception-mapping exception="java.lang.Exception" result="error"/> </global-exception-mappings> <action name="test"> <interceptor-ref name="exception"/> <interceptor-ref name="basicStack"/> <exception-mapping exception="com.acme.CustomException" result="custom_error"/> <result name="custom_error">custom_error.ftl</result> <result name="success" type="freemarker">test.ftl</result> </action> </package> </xwork>  
```
This second example will also log the exceptions using our own category com.mycompany.app.unhandled at WARN level.
```
  <xwork> <package name="something" extends="xwork-default"> <interceptors> <interceptor-stack name="exceptionmappingStack"> <interceptor-ref name="exception"> <param name="logEnabled">true</param> <param name="logCategory">com.mycompany.app.unhandled</param> <param name="logLevel">WARN</param>	        		 </interceptor-ref>	 <interceptor-ref name="i18n"/> <interceptor-ref name="staticParams"/> <interceptor-ref name="params"/> <interceptor-ref name="validation"> <param name="excludeMethods">input,back,cancel,browse</param> </interceptor-ref> </interceptor-stack> </interceptors> <default-interceptor-ref name="exceptionmappingStack"/> <global-results> <result name="unhandledException">/unhandled-exception.jsp</result> </global-results> <global-exception-mappings> <exception-mapping exception="java.lang.Exception" result="unhandledException"/> </global-exception-mappings> <action name="exceptionDemo" class="org.apache.struts2.showcase.exceptionmapping.ExceptionMappingAction"> <exception-mapping exception="org.apache.struts2.showcase.exceptionmapping.ExceptionMappingException" result="damm"/> <result name="input">index.jsp</result> <result name="success">success.jsp</result>             <result name="damm">damm.jsp</result> </action> </package> </xwork>  
```
@author Matthew E. Porter (matthew dot porter at metissian dot com) @author Claus Ibsen




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153             }
            iterator = MakeIterator.convert(findValue(value));
            */


            // get the first
            ValueStack stack = getStack();
            if ((iterator != null) && iterator.hasNext())
            {
                Object currentValue = iterator.next();
                if (currentValue!=null)
                {
                    stack.push(currentValue);
            /*
             * UPGRADE-struts 2.1.6
             * CHANGE: changed "getId()" to "getVar()"
             * Reason: The Funktion no longer exists.
             */
                    String id = getVar();


                    if ((id != null))
                    {
                        //pageContext.setAttribute(id, currentValue);
                        //pageContext.setAttribute(id, currentValue, PageContext.REQUEST_SCOPE);
                        stack.getContext().put(id, currentValue);
                    }


                    // Status object
                    if (statusAttr != null)
                    {
                        statusState.setLast((isReader==false) ? !iterator.hasNext() : false); 
                        oldStatus = stack.getContext().get(statusAttr);
                        stack.getContext().put(statusAttr, status);
                    }


                    // Set current Value
                    if (isReader==false)
                        pageContext.setAttribute(EmpireValueTagSupport.BEAN_ITEM_ATTRIBUTE, currentValue);
 

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205             else
            {   // A bean list
                boolean result = super.end(writer, body);
                if (result)
                {   // Set current Value
                    ValueStack stack = getStack();
                    pageContext.setAttribute(EmpireValueTagSupport.BEAN_ITEM_ATTRIBUTE, stack.peek());
                }
                return result;
            }
        }    

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60         ConfigurationManager configurationManager = new ConfigurationManager();
        configurationManager.addContainerProvider(new XWorkConfigurationProvider());
        Configuration config = configurationManager.getConfiguration();
        Container container = config.getContainer();


        ValueStack stack = container.getInstance(ValueStackFactory.class).createValueStack();
        stack.getContext().put(ActionContext.CONTAINER, container);
        ActionContext.setContext(new ActionContext(stack.getContext()));


        ActionContext.getContext().setSession(new HashMap<String, Object>());


        // change the port on the mailSender so it doesn't conflict with an 
        // existing SMTP server on localhost

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124   private void generatorContent(String finalLocation,
      ActionInvocation invocation) throws Exception
  {
    long runtime = System.currentTimeMillis();


    ValueStack stack = ActionContext.getContext().getValueStack();


    HttpServletRequest request = ServletActionContext.getRequest();
    HttpServletResponse response = ServletActionContext.getResponse();
    JspFactory jspFactory = null;
    ServletContext servletContext = ServletActionContext

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86       sf.autoWireBean(beanNameFinder);
    }
  }


  protected void initReloadClassLoader() {
    if (isReloadEnabled() && reloadingClassLoader == null) reloadingClassLoader = new ReloadingClassLoader(
        getClassLoader());
  }

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148         @Override
        public boolean contains(Object o) {
          return !ObjectUtils.equals(o, "file");
        }
      };
      ClassFinder finder = new ClassFinder(getClassLoaderInterface(), buildUrls(), false, jarProtocols);
      for (String packageName : actionPackages) {
        Test<ClassFinder.ClassInfo> test = getPackageFinderTest(packageName);
        classes.addAll(finder.findClasses(test));
      }
    } catch (Exception ex) {
      logger.error("Unable to scan named packages", ex);
    }
    return classes;

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121   }


  protected ClassLoaderInterface getClassLoaderInterface() {
    if (isReloadEnabled()) return new ClassLoaderInterfaceDelegate(reloadingClassLoader);
    else {
      ClassLoaderInterface classLoaderInterface = null;
      ActionContext ctx = ActionContext.getContext();
      if (ctx != null) classLoaderInterface = (ClassLoaderInterface) ctx
          .get(ClassLoaderInterface.CLASS_LOADER_INTERFACE);
      return (ClassLoaderInterface) ObjectUtils.defaultIfNull(classLoaderInterface,
          new ClassLoaderInterfaceDelegate(getClassLoader()));

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186   }


  private Set<URL> buildUrls() {
    Set<URL> urls = CollectUtils.newHashSet();
    Enumeration<URL> em;
    ClassLoaderInterface classloader = getClassLoaderInterface();
    try {
      em = classloader.getResources("struts-plugin.xml");
      while (em.hasMoreElements()) {
        URL url = em.nextElement();
        urls.add(new URL(substringBeforeLast(url.toExternalForm(), "struts-plugin.xml")));
      }
      em = classloader.getResources("struts.xml");
      while (em.hasMoreElements()) {
        URL url = em.nextElement();
        urls.add(new URL(substringBeforeLast(url.toExternalForm(), "struts.xml")));
      }
    } catch (IOException e) {

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123     logger.info("Action scan completely,create {} action in {} ms", newActions,
        System.currentTimeMillis() - start);
  }


  protected ClassLoaderInterface getClassLoaderInterface() {
    if (isReloadEnabled()) return new ClassLoaderInterfaceDelegate(reloadingClassLoader);
    else {
      ClassLoaderInterface classLoaderInterface = null;
      ActionContext ctx = ActionContext.getContext();
      if (ctx != null) classLoaderInterface = (ClassLoaderInterface) ctx
          .get(ClassLoaderInterface.CLASS_LOADER_INTERFACE);
      return (ClassLoaderInterface) ObjectUtils.defaultIfNull(classLoaderInterface,
          new ClassLoaderInterfaceDelegate(getClassLoader()));
    }
  }

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268         // happen
        // This is a critical exception, so we better throw a
        // ValidationException
        // no need to continue
        logger.error(e);
        throw new ValidationException("Could not open inputstream for "
            + i);
      }
      imageSize = (int) i.length();
    } else {
      // it's .. uhm, something else. A football ? A hot blonde's address
      // ? Fourty Two ? We'll never know ..
      throw new ValidationException(
          "Invalid object. Expect either a String or File object. Object is "
              + image.getClass().getName());
    }
    if (!ii.check()) {
      setMessageKey(getMessageKey() + ".invalid");

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