Module: Uricp::Strategy::CacheCommon

Included in:
CachedGet, PipedCache, PipedCacheConvert, PipedRbdGet, RbdCacheCheck, RbdCacheClone, RbdCachedGet, RbdCachedPut, RbdSnap
Defined in:
lib/uricp/strategy/cache_common.rb

Instance Method Summary collapse

Instance Method Details

#cache_exists? ⇒ Boolean

Returns:

  • (Boolean) 


50
51
52
53
54
 
# File 'lib/uricp/strategy/cache_common.rb', line 50

def cache_exists?
  cache_root && %w[temp cache].all? do |d|
    File.directory?(File.join(cache_root, d))
  end
end

#cache_file ⇒ Object 



64
65
66
 
# File 'lib/uricp/strategy/cache_common.rb', line 64

def cache_file
  @cache_file ||= File.join(cache_root, 'cache', cache_name)
end

#cache_name ⇒ Object 



46
47
48
 
# File 'lib/uricp/strategy/cache_common.rb', line 46

def cache_name
  options['cache_name']
end

#cache_root ⇒ Object 



42
43
44
 
# File 'lib/uricp/strategy/cache_common.rb', line 42

def cache_root
  options['cache']
end

#in_cache? ⇒ Boolean

Returns:

  • (Boolean) 


38
39
40
 
# File 'lib/uricp/strategy/cache_common.rb', line 38

def in_cache?
  File.readable?(cache_file) || options['dry-cache'] == :rbd
end

#temp_cache_file ⇒ Object 



56
57
58
 
# File 'lib/uricp/strategy/cache_common.rb', line 56

def temp_cache_file
  @temp_cache_file ||= File.join(cache_root, 'temp', cache_name)
end

#temp_cache_uri ⇒ Object 



60
61
62
 
# File 'lib/uricp/strategy/cache_common.rb', line 60

def temp_cache_uri
  URI.join('file:///', temp_cache_file)
end

#validate_cache! ⇒ Object

Raises:



7
8
9
10
11
12
13
14
15
16
17
18
 
# File 'lib/uricp/strategy/cache_common.rb', line 7

def validate_cache!
  return if dry_run?

  unless cache_exists?
    raise Uricp::MissingCache,
          "no cache found at #{cache_root}. Expected a 'cache' and 'temp' directory"
  end
  return if cache_name

  raise Uricp::MissingCache,
        'no cache name found'
end

#with_active_cache ⇒ Object 



20
21
22
23
24
25
26
27
 
# File 'lib/uricp/strategy/cache_common.rb', line 20

def with_active_cache
  if cache_root
    yield
  else
    debug "#{self.class.name}: no cacheing requested"
    false
  end
end

#without_active_cache ⇒ Object 



29
30
31
32
33
34
35
36
 
# File 'lib/uricp/strategy/cache_common.rb', line 29

def without_active_cache
  if cache_root
    debug "#{self.class.name}: cache active - not appropriate"
    false
  else
    yield
  end
end