NAME

RPC::ExtDirect::API::Method - Ext.Direct Method object

DESCRIPTION

This package implements an Ext.Direct Method object that holds Method's properties and can be subclassed to change its behavior.

This document does not provide an overview of a Method. For that information, see "ACTIONS AND METHODS" in RPC::ExtDirect::API.

METHOD OBJECT INTERFACE

RPC::ExtDirect::API::Method provides several public methods:

HOOK_TYPES

Class/instance method. Returns the list of supported hook types. See "HOOKS" in RPC::ExtDirect for more information.

new

Constructor. Returns a new RPC::ExtDirect::API::Method object. Accepts named arguments in a hash.

Parameters:

config

A RPC::ExtDirect::Config instance to be used with this Method.

This parameter is mandatory.

action

An Action name this Method belongs to.

This parameter is mandatory.

name

This Method's name. Should be unique among the methods in an Action.

This parameter is mandatory.

len

Number of parameters accepted by an ordered Method.

This parameter is mandatory for ordered Methods, and should not be defined for Methods of other calling conventions.

params

An arrayref with names of parameters accepted by a named Method.

This parameter is mandatory for named Methods, and should not be defined for Methods of other calling conventions.

formHandler

A boolean flag indicating that this Method is a Form Handler.

This parameter is mandatory for Form handler Methods, and should not be defined for Methods of other calling conventions.

pollHandler

A boolean flag indicating that this Method is a Poll Handler.

This parameter is mandatory for Poll handler Methods, and should not be defined for Methods of other calling conventions.

package

Name of the package this Method's code belongs to.

This parameter is mandatory.

strict

A boolean flag that enables or disables lazy parameter checking for a named Method.

This parameter is optional and should only be used with named Methods.

before|instead|after

A Hook definition of the specified type for this Method. See "code" in RPC::ExtDirect::API::Hook for the list of supported options.

All three of these parameters are optional.

env_arg

Use this parameter to indicate that this Method needs an environment object passed to it. Before RPC::ExtDirect 3.0, a Method was passed an environment object on every invocation; this behavior caused problems in certain cases.

For ordered Methods and Poll handler Methods, env_arg parameter should be a number for the @_ position that the env object should be spliced in. To receive the env object as the first argument, use 0; to receive it as the last argument, use some number greater than the number of parameters accepted by the Method (e.g. 99).

For named Methods and Form handler Methods, env_arg parameter should be a name of the hash key in which the environment object is passed.

upload_arg

Use this parameter to change the hash key name in which the file upload array is passed to a Form handler Method. Default is 'file_uploads'.

other

Any other hash key with the corresponding value will be stored in the Method object.

get_api_definition

Instance method. Returns a hashref with the Method's definition for the API declaration, or an empty list if the Method should not be included in the remoting API published to the client side.

If you need to affect Ext.Direct API generation, this method is the place to do it. One example option is running a check on the user's credentials, and deciding to include or exclude this particular Method from the API generated for this user.

Parameters (by position):

• An environment object for this invocation.

  The stock get_api_definition method does not use this environment object; it is provided to be potentially utilized in subclasses.

get_api_definition_compat

Instance method. Returns a hashref with the Method's definition that is backwards compatible with versions 1.x and 2.x of RPC::ExtDirect.

This method should not be used under normal circumstances.

run

Instance method. Runs the Method's subroutine code and returns the Result of the invocation. Accepts named arguments in a hash.

The Method subroutine code is always called as a class method. For Poll handlers, the code is called in a list context; for Methods of other calling conventions, the code is called in scalar context.

Parameters:

arg

The actual arguments that should be passed to the Method's code. This should be an arrayref for ordered Methods and Poll handlers, or a hashref the other calling convention.

Note that the value of this parameter is the same as returned by "prepare_method_arguments" method.

prepare_method_arguments

Instance method. Accepts named arguments in a hash, and runs a specific preparer method (see below) on these arguments, depending on the Method's calling convention.

The return value of this method is the arguments fed to the Method's code invoked in the "run" method.

Parameters:

env

An environment object that is to be passed to the Method's code if Method has requested it.

input

Method arguments passed from the client side. The type of the input depends on the Method's calling convention.

upload

Arrayref of file upload hashrefs. See "FILE UPLOADS" in RPC::ExtDirect for more information.

This parameter is only defined for Form handler methods when uploaded files are present.

prepare_ordered_arguments

Instance method. Takes input arguments for the Method and returns an arrayref conformant to the ordered Method's definition. This arrayref will optionally contain env object.

prepare_named_arguments

Instance method. Takes input arguments for the Method and returns a hashref conformant to the named Method's definition. This hashref will optionally contain env object.

prepare_formHandler_arguments

Instance method. Takes input arguments for the Method and returns a hashref conformant to the Form Handler Method's definition. This hashref will optionally contain env object.

prepare_pollHandler_arguments

Instance method. Returns an arrayref conformant to Poll handler method's definition. This arrayref will optionally contain env object.

ACCESSOR METHODS

For RPC::ExtDirect::API::Method, the following accessor methods are provided:

config

Return the RPC::ExtDirect::Config instance assigned to this Method object.

action

Return the Action name for this Method object.

name

Return the Method name for this Method object.

len

Return the number of the parameters accepted by this ordered Method.

For any other calling convention, len should be undef.

params

Return the names of the mandatory parameters accepted by this named Method.

For any other calling convention, params should be undef.

formHandler

Return true if this Method is a Form Handler.

For any other calling convention, formHandler should be undef.

pollHandler

Return true if this Method is a Poll Handler.

For any other calling convention, pollHandler should be undef.

is_ordered

Return true if this is an ordered Method.

is_named

Return true if this is a named Method.

strict

Return false for Named methods with lazy parameter checking.

Defaults to true.

package

Return the name of the package this Method's code belongs to.

env_arg

Return the name or position for the environment object parameter.

See "new".

upload_arg

Return the name of the file upload parameter for a Form handler.

See "new".

before|instead|after

Return the Hook object for the corresponding hook slot assigned to this Method.