Class::Workflow::YAML - Load workflow definitions from YAML files.

	my $y = Class::Workflow::YAML->new;

	my $w = $y->load_file("workflow.yml");

	# an exmaple workflow.yml for the bug flow
	# mentioned in Class::Workflow
	---
	# data not under the key "workflow" is ignored.
	# In this example I use 'misc' to predeclare
	# an alias to some code I'll be using later.
	misc:
	  set_owner_to_current_user: &setowner !perl/code: |
	    {
	      my ( $self, $instance, $c ) = @_;
	      # set the owner to the user applying the
	      # transition (see Class::Workflow::Context)
	      return { owner => $c->user };
	    }
	workflow:
	  initial_state: new
	  states:
	    - name: new
	      transitions:
	        # you can store transition
	        # information inline:
	        - name    : reject
	          to_state: rejected
	        # or symbolically, defining
	        # in the transitions section
	        - accept
	    - name: open
	      transitions:
	        - name    : reassign
	          to_state: unassigned
	          # clear the "owner" field in the instance
	          set_fields:
	            owner: ~
	        - name    : claim_fixed
	          to_state: awaiting_approval
	    - name: awaiting_approval
	      transitions:
	        - name    : resolved
	          to_state: closed
	        - name    : unresolved
	          to_state: open
	    - name: unassigned
	      transitions:
	        - name    : take
	          to_state: open
	          # to dynamically set instance
	          # you do something like this:
	          body_sets_fields: 1
	          body            : *setowner
	    # these two are end states
	    - closed
	    - rejected
	  # we now need to define
	  # the "accept" transition
	  transitions:
	    - name            : accept
	      to_state        : open
	      body_sets_fields: 1
	      body            : *setowner

This module lets you easily load workflow definitions from YAML files.

YAML is nice for this because its much more concise than XML, and allows clean embedding of perl code.

workflow_key

load_file $filename

load_string $string

Load the YAML data, and call inflate_hash on an empty workflow.

inflate_hash $workflow, $hash

Define the workflow using the data inside $hash->{$self->workflow_key}.

empty_workflow

Calls Class::Workflow->new

localize_yaml_env

A wrapper method to locally set $YAML::Syck::UseCode to 1.

Class::Workflow, YAML