interceptor | 易学教程

NHibernate Interceptor Auditing Inserted Object Id

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I am using NHibernate interceptors to log information about Updates/Inserts/Deletes to my various entities. Included in the information logged is the Entity Type and the Unique Id of the entity modified. The unique Id is marked as a <generator class="identity"> in the NHibernate mapping file. The obvious problem is when logging an Insert operation using IInterceptor.OnSave() the Id of the entity has not yet been assigned. How can I obtain the Id of the inserted entity before logging the audit information? (I have looked into NHibernate Listeners PostSave event but can't get them working with

Automating access token refreshing via interceptors in axios

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We've recently discussed an axios' interceptor for OAuth authentication token refresh in this question . Basically, what the interceptor should do is to intercept any response with 401 status code and try to refresh the token. With that in mind, the next thing to do is to return a Promise from the interceptor, so that any request which would have normally fail, would run as nothing happens after a token refresh. The main problem is, that an interceptor checks only the 401 status code, which is not enough, as the refreshToken will also return 401 status code when it fails - and we have a loop.

Angular HTTP interceptor executed for embedded ng-templates

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问题 I have an Angular interceptor working: factory('myHttpInterceptor', function ($q, $location, $rootScope) { // do something return function (promise) { return promise.then(function (response) { // do something return response; }, function (response) { // do something return $q.reject(response); }); }; }) and one big html file which contains templates like <script type="text/ng-template" id="home-template"> . Unfortunately my HTTP interceptor intercepts not only loading HTTP requests but also

flume源码编译/拦截器分析（一）

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flume介绍由于是第一次进行源码编译与开发，步骤有点复杂，后续再进行简化 Flume是Cloudera提供的一个高可用、高可靠、分布式的海量日志采集、聚合和传输的系统。Flume支持在日志系统中定制各类数据发送方用于收集数据，同时Flume提供对数据的简单处理，并将数据处理结果写入各种数据接收方的能力。 flume源码编译编译所需环境： maven 3.x java sdk 1.6 以上 git 下载源码，本文选用的是 apache-flume-1.6.0-src.tar.gz 解压至工作路径中，在git中执行： mvn clean mvn package -DskipTests 结果如下图所示即编译成功。然后在如下图的所示的flume-ng-dist文件夹下的target下出现apche-flume-1.6.0-bin.tar.gz与apche-flume-1.6.0-src.tar.gz，这样就可以任意的修改/开发各种自己需要的功能了。注意，在下载的源码中有hadoop与hbase版本需要修改，不同版本修改不同，上网搜一下看看。 flume拦截器 Flume中的拦截器（interceptor），用户Source读取events发送到Sink的时候，在events header中加入一些有用的信息，或者对events的内容进行过滤，完成初步的数据清洗

Exception handler in Spring MVC

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问题 I want to create an exception handler which will intercept all controllers in my project. Is that possible to do? Looks like I have to put a handler method in each controller. Thanks for your help. I have a spring controller that sends Json response. So if an exception happens I want to send an error response which can be controlled from one place. 回答1: (I found a way to implement it in Spring 3.1, this is described in the second part of this answer) See chapter 16.11 Handling exceptions of

CDI interceptor does not work when annotation has parameter

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问题 I'm trying to implement a @Restricted annotation, to secure controller methods in a way that users can only access them, when they are logged in and have a certain role. I'm on Tomcat 7 using JSF and CDI, so no EJB. The interceptor gets called as long as the annotation interface does not specify any parameters. As soon as I add a @Nonbinding Role value() default Role.ADMIN; parameter, neither the interceptor nor the controller method execute. No errors or exceptions either. Here is my code, I

How to tell if a transaction is active in a Java EE 6 interceptor?

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问题 I am planning to write an interceptor for an EJB that will do basically the following: @AroundInvoke public Object setContext(InvocationContext ctx) throws Exception { em.createQuery("... set something [database specific] ...").getSingleResult(); try { return ctx.proceed(); } finally { em.flush(); em.createQuery("... unset something [database specific] ...").getSingleResult(); } } The problem is that em.flush() throws an exception if it is applied to a method annotated with

angularjs $httpProvider interceptor documentation

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I am new to angular (and programming), here is a seemingly simple question but I could not figure it out. some tutorials suggests using $httpProvider.interceptors.push('interceptorName') to manipulate the http request and response. I want to know more about the interceptor thing so I look at the official document, but I could not find anything related to interceptor, there are only a method (useApplyAsync([value]);) and a property (defaults) in $httpProvider ( docs ). I know from other tutorials that an interceptor is a regular service factory and I know how to use it, but my question is:

CXF/ JAX-RS : Return Custom response from interceptor

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问题 We need to return custom error code and error message when exception occurs during REST invocation. We have created a exception mapper provider, it works well for the exceptions from the application code. However, it doesn't work when exception occurs from the CXF code (e.g. form the CustomValidationInterceptor that I wrote). For example, if I request with invalid path parameter (e.g invalid phoneNumber). In this case, we need to return a custom error code and error message in JSON format,

Is there a way to intercept setters and getters in C#?

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问题 In both Ruby and PHP (and I guess other languages as well) there are some utility methods that are called whenever a property is set. ( *instance_variable_set* for Ruby, *__set* for PHP). So, let's say I have a C# class like this: public class Person { public string FirstName { get; set; } public string LastName { get; set; } } Now, let's say that if any property setter from the Person class is called, I want to call another method first, and then continue with the default behaviour of the