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Class: Kward::PluginStore

Inherits:
Object
  • Object
show all
Defined in:
lib/kward/plugins/host.rb

Overview

Private JSON-backed key/value storage scoped to one stable plugin ID.

Constant Summary collapse

KEY_PATTERN = 
/\A[A-Za-z0-9][A-Za-z0-9:._-]*\z/.freeze

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(plugin_id, root: ConfigFiles.config_dir) ⇒ PluginStore

Returns a new instance of PluginStore.



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# File 'lib/kward/plugins/host.rb', line 20

def initialize(plugin_id, root: ConfigFiles.config_dir)
  @plugin_id = validate_key(plugin_id, "plugin id")
  @path = File.join(File.expand_path(root), "plugin_state", @plugin_id, "state.json")
  @mutex = Mutex.new
  @values = load_state
end

Instance Attribute Details

#plugin_id ⇒ Object (readonly)

Returns the value of attribute plugin_id.



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# File 'lib/kward/plugins/host.rb', line 18

def plugin_id
  @plugin_id
end

Instance Method Details

#delete(key) ⇒ Object 



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# File 'lib/kward/plugins/host.rb', line 41

def delete(key)
  key = validate_key(key, "storage key")
  @mutex.synchronize do
    present = @values.key?(key)
    value = @values.delete(key)
    persist if present
    copy(value)
  end
end

#get(key) ⇒ Object 



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# File 'lib/kward/plugins/host.rb', line 27

def get(key)
  key = validate_key(key, "storage key")
  @mutex.synchronize { copy(@values[key]) }
end

#put(key, value) ⇒ Object 



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# File 'lib/kward/plugins/host.rb', line 32

def put(key, value)
  key = validate_key(key, "storage key")
  @mutex.synchronize do
    @values[key] = copy(value)
    persist
  end
  value
end

#scoped(namespace) ⇒ Object

Returns a view whose keys cannot overlap another plugin-owned scope.



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# File 'lib/kward/plugins/host.rb', line 52

def scoped(namespace)
  PluginScopedStore.new(self, namespace)
end