ColdBox HMVC Documentation
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      • ColdBox.cfc
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  • The Basics
    • Request Context
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      • Requirements
        • Rewrite Rules
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        • Routing By Convention
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      • How are events called?
      • Getting & Setting Values
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      • Interception Methods
        • Pre Advices
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        • Around Advices
      • Model Integration
        • Model Data Binding
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        • Rendering Views
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      • Object Scopes
      • Coding: Solo Style
        • Datasource
        • Contact.cfc
        • ContactDAO.cfc
        • ContactService.cfc
        • Contacts Handler
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        • ORM
        • Contact.cfc
        • Contacts Handler
        • Views
      • Coding: Virtual Service Layer
        • ORM
        • Contacts.cfc
        • Contacts Handler
        • Views
      • Coding: ORM Scaffolding
        • ORM
        • Contacts.cfc
        • Scaffold
  • HMVC
    • Modules
      • Core Modules
      • Locations
      • Parent Configuration
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        • Changing The Module Layout
      • Module Service
        • Module Lifecycle
        • Module Registration
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        • Common Methods
        • Loading New Modules
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        • Module Events
      • ModuleConfig
        • Public Module Properties\/Directives
        • The Decorated Variables
        • The configure() Method
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        • Interceptor Events
      • Module Event Executions
      • URL Routing
        • Default Route Execution
        • Module Routes Files
      • Request Context Module Methods
      • Layout and View Renderings
        • Layout\/View Discovery
        • Overriding Views
        • Overriding Layouts
        • Default Module Layout
        • Explicit Module Renderings
      • Models
      • Module CF Mappings
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  • Testing
    • Testing Quick Start
    • Testing ColdBox Applications
      • Test Harness
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      • Integration Testing
        • Test Annotations
        • Common Methods
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        • The execute() Method
        • The Handler To Test
        • The Integration Test
        • Handler Returning Results
        • Testing Without Virtual Application
        • Rendering Results
        • HTTP Method Mocking
      • Interceptor Testing
      • Model Object Testing
      • Tips & Tricks
  • Digging Deeper
    • Interceptors
      • How do they work?
        • Conventions
      • Interceptor Declaration
      • Interceptor Registration
      • Core Interception Points
        • Application Life Cycle Events
        • Object Creating Events
        • Layout-View Events
        • Module Events
        • CacheBox Events
      • Restricting Execution
      • Interceptor Output Buffer
      • Custom Events
        • Configuration Registration
        • Programmatic Registration
        • Listening
        • Announcing Interceptions
      • Unregistering Interceptors
      • Reporting Methods
      • Interceptor Asynchronicity
        • Async Announcements
        • Async Listeners With Join
        • Async Listeners No Join
        • Asynchronous Annotations
    • Flash RAM
      • Flash Storage
      • Using Flash RAM
      • Creating Your Own Flash Scope
    • HTML Helper
    • ColdBox Proxy
      • Getting Started
      • The Base Proxy Object
      • The Event Handlers
        • Distinguishing Request Types
        • RenderData()
      • Proxy Events
      • Standard Return Types
      • Caveats & Gotchas
    • Request Context Decorator
    • Controller Decorator
    • Recipes
      • Building REST APIs
      • Application Templates
      • ColdBox Exception Handling
      • Debugging ColdBox Apps
      • Clearing the View Cache
      • Building a simple Basic HTTP Authentication Interceptor
  • Architecture Concepts
    • What is MVC
    • What is ColdBox
    • How ColdBox Works
    • Testing Concepts
      • Functional Testing
      • Non-Functional Testing
      • Bugs Cost Money
      • Static Testing
      • Dynamic Testing
      • Developer Focus
      • Testing Vocabulary
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  1. Digging Deeper
  2. Interceptors

How do they work?

Last updated 5 years ago

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Interceptors are CFCs that extend the ColdBox Interceptor class (coldbox.system.Interceptor), implement a configuration method called configure(), and then contain methods for the events it will listen for. All interceptors are treated as singletons in your application, so make sure they are thread safe and var scoped.

/**
* My Interceptor
*/
component extends="coldbox.system.Interceptor"{

    function configure(){}

    function preProcess( event, interceptData, buffer, rc, prc ){}
}

You can use CommandBox to create interceptors as well:

coldbox create interceptor help

Registration

Interceptors can be registered in your Coldbox.cfc configuration file using the interceptors struct, or they can be registered manually via the system's interceptor service.

In ColdBox.cfc:

// Interceptors registration
interceptors = [
    {
        class   = "cfc.path", //by default this should be interceptors.yourcfcname  
        name    = "unique name/wirebox ID",
        properties = {
            // configuration
        }
    }
];

Registered manually:

controller.getInterceptorService().registerInterceptor( interceptorClass="cfc.path" );

The configure() Method

The interceptor has one important method that you can use for configuration called configure(). This method will be called right after the interceptor gets created and injected with your interceptor properties.

Info These properties are local to the interceptor only!

As you can see on the diagram, the interceptor class is part of the ColdBox framework super type family, and thus inheriting the functionality of the framework.

Info You can also remove the inheritance from the CFC (preferred method) and WireBox will extend the coldbox.system.Interceptor for you using .

Virtual Inheritance