Class: Jerakia::Cache::File
- Inherits:
-
Object
- Object
- Jerakia::Cache::File
- Defined in:
- lib/jerakia/cache/file.rb
Class Method Summary collapse
- .add(index, data) ⇒ Object
- .cache ⇒ Object
- .get(index) ⇒ Object
- .import_file(filename) ⇒ Object
-
.retrieve(filename) ⇒ Object
If the cache has a valid copy of the file, then we retrieve it, if the cache doesn’t have a copy, or if the state has changed, then we should add it to the cache again and overite the existing data.
-
.state(filename) ⇒ Object
Returns the latest mtime of the file if the file exists and nil if it doesn’t exist.
- .valid?(index) ⇒ Boolean
Class Method Details
.add(index, data) ⇒ Object
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# File 'lib/jerakia/cache/file.rb', line 16 def add(index, data) filestate = state(index) Jerakia.log.debug("Adding #{index} to file cache with state #{filestate}") cache.add(index, data, :state => filestate) if filestate end |
.get(index) ⇒ Object
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# File 'lib/jerakia/cache/file.rb', line 59 def get(index) cache.get(index) end |
.import_file(filename) ⇒ Object
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# File 'lib/jerakia/cache/file.rb', line 39 def import_file(filename) Jerakia.log.debug("Importing file #{filename} to file cache") File.read(filename) end |
.retrieve(filename) ⇒ Object
If the cache has a valid copy of the file, then we retrieve it, if the cache doesn’t have a copy, or if the state has changed, then we should add it to the cache again and overite the existing data.
Returns nil if the file doesn’t exist
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# File 'lib/jerakia/cache/file.rb', line 50 def retrieve(filename) if valid?(filename) Jerakia.log.debug("Using cached contents of #{filename}") get(filename) else add(filename, import_file(filename)) if File.exists?(filename) end end |
.state(filename) ⇒ Object
Returns the latest mtime of the file if the file exists and nil if it doesn’t exist.
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# File 'lib/jerakia/cache/file.rb', line 12 def state(filename) ::File.stat(filename).mtime if ::File.exist?(filename) end |
.valid?(index) ⇒ Boolean
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# File 'lib/jerakia/cache/file.rb', line 22 def valid?(index) if cache.in_bucket?(index) unless File.exists?(index) cache.purge(index) return false end = cache.(index) if [:state] == state(index) else false end else false end end |