Class: Moneta::Adapters::PStore
- Inherits:
-
Object
- Object
- Moneta::Adapters::PStore
- Includes:
- Defaults
- Defined in:
- lib/moneta/adapters/pstore.rb
Overview
PStore backend
Direct Known Subclasses
Instance Attribute Summary collapse
- #backend ⇒ Object readonly
Instance Method Summary collapse
-
#clear(options = {}) ⇒ void
Clear all keys in this store.
-
#create(key, value, options = {}) ⇒ Boolean
Atomically sets a key to value if it’s not set.
-
#delete(key, options = {}) ⇒ Object
Delete the key from the store and return the current value.
-
#increment(key, amount = 1, options = {}) ⇒ Object
Atomically increment integer value with key.
-
#initialize(options = {}) ⇒ PStore
constructor
A new instance of PStore.
-
#key?(key, options = {}) ⇒ Boolean
Exists the value with key.
-
#load(key, options = {}) ⇒ Object
Fetch value with key.
-
#store(key, value, options = {}) ⇒ Object
Store value with key.
Methods included from Defaults
#[], #[]=, #close, #decrement, #features, #fetch, included, #supports?
Methods included from OptionSupport
#expires, #prefix, #raw, #with
Constructor Details
#initialize(options = {}) ⇒ PStore
Returns a new instance of PStore.
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# File 'lib/moneta/adapters/pstore.rb', line 17 def initialize( = {}) @backend = [:backend] || begin raise ArgumentError, 'Option :file is required' unless [:file] FileUtils.mkpath(::File.dirname([:file])) new_store() end end |
Instance Attribute Details
#backend ⇒ Object (readonly)
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# File 'lib/moneta/adapters/pstore.rb', line 12 def backend @backend end |
Instance Method Details
#clear(options = {}) ⇒ void
This method returns an undefined value.
Clear all keys in this store
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# File 'lib/moneta/adapters/pstore.rb', line 68 def clear( = {}) @backend.transaction do @backend.roots.each do |key| @backend.delete(key) end end self end |
#create(key, value, options = {}) ⇒ Boolean
Not every Moneta store implements this method, a NotImplementedError is raised if it is not supported.
Atomically sets a key to value if it’s not set.
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# File 'lib/moneta/adapters/pstore.rb', line 56 def create(key, value, = {}) @backend.transaction do if @backend.root?(key) false else @backend[key] = value true end end end |
#delete(key, options = {}) ⇒ Object
Delete the key from the store and return the current value
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# File 'lib/moneta/adapters/pstore.rb', line 42 def delete(key, = {}) @backend.transaction { @backend.delete(key) } end |
#increment(key, amount = 1, options = {}) ⇒ Object
Not every Moneta store implements this method, a NotImplementedError is raised if it is not supported.
Atomically increment integer value with key
This method also accepts negative amounts.
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# File 'lib/moneta/adapters/pstore.rb', line 47 def increment(key, amount = 1, = {}) @backend.transaction do value = Utils.to_int(@backend[key]) + amount @backend[key] = value.to_s value end end |
#key?(key, options = {}) ⇒ Boolean
Exists the value with key
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# File 'lib/moneta/adapters/pstore.rb', line 27 def key?(key, = {}) @backend.transaction(true) { @backend.root?(key) } end |
#load(key, options = {}) ⇒ Object
Fetch value with key. Return nil if the key doesn’t exist
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# File 'lib/moneta/adapters/pstore.rb', line 32 def load(key, = {}) @backend.transaction(true) { @backend[key] } end |
#store(key, value, options = {}) ⇒ Object
Store value with key
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# File 'lib/moneta/adapters/pstore.rb', line 37 def store(key, value, = {}) @backend.transaction { @backend[key] = value } end |