Class: OpenWFE::SetValueExpression

Inherits:
FlowExpression show all
Includes:
ValueMixin
Defined in:
lib/openwfe/expressions/fe_set.rb

Overview

The ‘set’ expression is used to set the value of a (process) variable or a (workitem) field.

<set field="price" value="CHF 12.00" />
<set variable="/stage" value="3" />
<set variable="/stage" field-value="f_stage" />
<set field="stamp" value="${r:Time.now.to_i}" />

(Notice the usage of the dollar notation in the last exemple).

‘set’ expressions may be placed outside of a process-definition body, they will be evaluated sequentially before the body gets applied (executed).

Shorter attributes are OK :

<set f="price" val="CHF 12.00" />
<set v="/stage" val="3" />
<set v="/stage" field-val="f_stage" />
<set f="stamp" val="${r:Time.now.to_i}" />

set :f => "price", :val => "USD 12.50"
set :v => "toto", :val => "elvis"

In case you need the value not to be evaluated if it contains dollar expressions, you can do

set :v => "v0", :val => "my ${template} thing", :escape => true

to prevent evaluation (i.e. to escape).

Instance Attribute Summary

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 included from ValueMixin

#apply, #lookup_field_attribute, #lookup_variable_attribute

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_to_parent, #set_variable, #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 Method Details

#reply(workitem) ⇒ Object 



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# File 'lib/openwfe/expressions/fe_set.rb', line 88

def reply (workitem)

    vkey = lookup_variable_attribute(workitem)
    fkey = lookup_field_attribute(workitem)

    value = workitem.attributes[FIELD_RESULT]

    #puts "value is '#{value}'"

    if vkey
        set_variable vkey, value
    elsif fkey
        workitem.set_attribute fkey, value
    else
        raise "'variable' or 'field' attribute missing from 'set' expression"
    end

    reply_to_parent(workitem)
end