1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
|
require 'puppet/transaction'
require 'puppet/transaction/event'
# Handle all of the work around performing an actual change,
# including calling 'sync' on the properties and producing events.
class Puppet::Transaction::Change
attr_accessor :is, :should, :property, :proxy
# Switch the goals of the property, thus running the change in reverse.
def backward
@is, @should = @should, @is
@property.should = @should
@property.info "Reversing %s" % self
return self.go
end
# Create our event object.
def event(event_name)
event_name ||= property.default_event_name(should)
# default to a simple event type
unless event_name.is_a?(Symbol)
@property.warning "Property '#{property.class}' returned invalid event '#{event_name}'; resetting to default"
event_name = property.default_event_name(should)
end
Puppet::Transaction::Event.new(event_name, resource.ref, property.name, is, should)
end
def initialize(property, currentvalue)
@property = property
@is = currentvalue
@should = property.should
@changed = false
end
# Perform the actual change. This method can go either forward or
# backward, and produces an event.
def go
if self.noop?
@property.log "is %s, should be %s (noop)" % [property.is_to_s(@is), property.should_to_s(@should)]
return event(:noop)
end
# The transaction catches any exceptions here.
event_name = @property.sync
# Use the first event only, if multiple are provided.
# This might result in the event_name being nil,
# which is fine.
event_name = event_name.shift if event_name.is_a?(Array)
event = event(event_name)
event.log = @property.notice @property.change_to_s(@is, @should)
event.status = "success"
event
rescue => detail
puts detail.backtrace if Puppet[:trace]
event = event(nil)
event.status = "failure"
is = property.is_to_s(is)
should = property.should_to_s(should)
event.log = property.err "change from #{is} to #{should} failed: #{detail}"
event
end
def forward
return self.go
end
# Is our property noop? This is used for generating special events.
def noop?
return @property.noop
end
# The resource that generated this change. This is used for handling events,
# and the proxy resource is used for generated resources, since we can't
# send an event to a resource we don't have a direct relationship with. If we
# have a proxy resource, then the events will be considered to be from
# that resource, rather than us, so the graph resolution will still work.
def resource
self.proxy || @property.resource
end
def to_s
return "change %s" % @property.change_to_s(@is, @should)
end
end
|
