Class MiddlewareQueue

Provides methods for creating and manipulating a "queue" of middleware callables. This queue is used to process a request and response via \Cake\Http\Runner.

Cake\Http\MiddlewareQueue implements Countable
Namespace: Cake\Http
Location: Http/MiddlewareQueue.php

Properties summary

  • $callables protected
    callable[]
    The queue of middleware callables.
  • $queue protected
    array
    The queue of middlewares.

Method Summary

  • __construct() public
    Constructor
  • add() public
    Append a middleware callable to the end of the queue.
  • count() public
    Get the number of connected middleware layers.
  • get() public
    Get the middleware at the provided index.
  • insertAfter() public
    Insert a middleware object after the first matching class.
  • insertAt() public
    Insert a middleware callable at a specific index.
  • Insert a middleware object before the first matching class.
  • prepend() public
    Prepend a middleware to the start of the queue.
  • push() public
    Alias for MiddlewareQueue::add().
  • resolve() protected
    Resolve middleware name to callable.

Method Detail

__construct()source public 

__construct( array $middleware [] )

Constructor

Parameters

array $middleware optional []
The list of middleware to append.

add()source public 

add( callable|string|array $middleware )

Append a middleware callable to the end of the queue.

Parameters

callable|string|array $middleware
The middleware(s) to append.

Returns


$this

count()source public 

count( )

Get the number of connected middleware layers.

Implement the Countable interface.

Returns

integer

Implementation of

Countable::count()

get()source public 

get( integer $index )

Get the middleware at the provided index.

Parameters

integer $index
The index to fetch.

Returns

callable|null

Either the callable middleware or null if the index is undefined.


insertAfter()source public 

insertAfter( string $class , callable|string $middleware )

Insert a middleware object after the first matching class.

Finds the index of the first middleware that matches the provided class, and inserts the supplied callable after it. If the class is not found, this method will behave like add().

Parameters

string $class
The classname to insert the middleware before.
callable|string $middleware
The middleware to insert.

Returns


$this

insertAt()source public 

insertAt( integer $index , callable|string $middleware )

Insert a middleware callable at a specific index.

If the index already exists, the new callable will be inserted, and the existing element will be shifted one index greater.

Parameters

integer $index
The index to insert at.
callable|string $middleware
The middleware to insert.

Returns


$this

insertBefore()source public 

insertBefore( string $class , callable|string $middleware )

Insert a middleware object before the first matching class.

Finds the index of the first middleware that matches the provided class, and inserts the supplied callable before it.

Parameters

string $class
The classname to insert the middleware before.
callable|string $middleware
The middleware to insert.

Returns


$this

Throws

LogicException
If middleware to insert before is not found.

prepend()source public 

prepend( callable|string|array $middleware )

Prepend a middleware to the start of the queue.

Parameters

callable|string|array $middleware
The middleware(s) to prepend.

Returns


$this

push()source public 

push( callable|string|array $middleware )

Alias for MiddlewareQueue::add().

Parameters

callable|string|array $middleware
The middleware(s) to append.

Returns


$this

See

MiddlewareQueue::add()

resolve()source protected 

resolve( integer $index )

Resolve middleware name to callable.

Parameters

integer $index
The index to fetch.

Returns

callable|null

Either the callable middleware or null if the index is undefined.


Properties detail

$callablessource

protected callable[]

The queue of middleware callables.

[]

$queuesource

protected array

The queue of middlewares.

[]

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https://api.cakephp.org/3.4/class-Cake.Http.MiddlewareQueue.html