Class: OpenWFE::DefineExpression

Inherits:
SequenceExpression show all
Defined in:
lib/openwfe/expressions/fe_define.rb

Overview

The <process-definition> expression.

Instance Attribute Summary collapse

Attributes inherited from FlowExpression

#apply_time, #attributes, #children, #environment_id, #fei, #parent_id, #raw_representation

Attributes included from Contextual

#application_context

Instance Method Summary collapse

Methods inherited from SequenceExpression

#apply, #reply

Methods inherited from FlowExpression

#apply, #cancel, #clean_children, #delete_variable, #dup_environment, #fetch_environment, #fetch_text_content, #get_binding, #get_environment, #get_parent, #get_root_environment, #has_attribute, #initialize, is_definition, is_definition?, #lookup_attribute, #lookup_attributes, #lookup_boolean_attribute, #lookup_comma_list_attribute, #lookup_downcase_attribute, #lookup_ref, #lookup_string_attribute, #lookup_sym_attribute, #lookup_value, #lookup_variable, #lookup_vf_attribute, names, #new_environment, new_exp, #owns_its_environment?, #paused?, #remove_child, #reply, #store_itself, #synchronize, #to_s, #to_yaml_properties

Methods included from Contextual

#get_work_directory, #init_service, #lookup

Methods included from Logging

#ldebug, #ldebug_callstack, #lerror, #lfatal, #linfo, #llog, #lunknown, #lwarn

Methods included from OwfeServiceLocator

#get_engine, #get_error_journal, #get_expool, #get_expression_map, #get_expression_pool, #get_expression_storage, #get_expression_storages, #get_journal, #get_participant_map, #get_scheduler, #get_wfid_generator

Methods inherited from ObjectWithMeta

#class_def, meta_def, meta_eval, metaclass

Constructor Details

This class inherits a constructor from OpenWFE::FlowExpression

Instance Attribute Details

#body_fei ⇒ Object

A pointer to the body expression of this process definition.



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# File 'lib/openwfe/expressions/fe_define.rb', line 58

def body_fei
  @body_fei
end

Instance Method Details

#reply_to_parent(workitem) ⇒ Object

Called at the end of the ‘evaluation’, the ‘apply’ operation on the body of the definition is done here.



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# File 'lib/openwfe/expressions/fe_define.rb', line 75

def reply_to_parent (workitem)

    #return if @eval_only

    #puts "/// \n   bf #{@body_fei} \n   wi.fei #{workitem.fei}"

    return super(workitem) \
        if @body_fei == nil or @body_fei == workitem.fei
        #unless @body_fei

    #_fei = @body_fei
    #@body_fei = nil
    #store_itself
    #get_expression_pool.apply _fei, workitem

    get_expression_pool.apply @body_fei, workitem
end

#set_variable(name, fei) ⇒ Object

Overrides the set_variable in FlowExpression to make sure to intercept requests for binding subprocesses at the engine level and to store a copy of the raw expression, not only the flow expression id.



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# File 'lib/openwfe/expressions/fe_define.rb', line 99

def set_variable (name, fei)

    if name[0, 2] == "//"

        raw_exp = get_expression_pool.fetch_expression(fei).dup
        raw_exp.parent_id = nil
        raw_exp.fei = raw_exp.fei.dup
        fei = raw_exp.fei
        fei.wfid = get_wfid_generator.generate 

        raw_exp.store_itself
    end

    super name, fei
end