Class: LaunchDarkly::InMemoryFeatureStore

Inherits:
Object
  • Object
show all
Includes:
LaunchDarkly::Interfaces::FeatureStore
Defined in:
lib/ldclient-rb/in_memory_store.rb

Overview

Default implementation of the LaunchDarkly client's feature store, using an in-memory cache. This object holds feature flags and related data received from LaunchDarkly. Database-backed implementations are available in Integrations.

Instance Method Summary collapse

Constructor Details

#initialize ⇒ InMemoryFeatureStore

Returns a new instance of InMemoryFeatureStore.



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# File 'lib/ldclient-rb/in_memory_store.rb', line 34

def initialize
  @items = Hash.new
  @lock = Concurrent::ReadWriteLock.new
  @initialized = Concurrent::AtomicBoolean.new(false)
end

Instance Method Details

#all(kind) ⇒ Object 



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# File 'lib/ldclient-rb/in_memory_store.rb', line 48

def all(kind)
  @lock.with_read_lock do
    coll = @items[kind]
    (coll.nil? ? Hash.new : coll).select { |_k, f| not f[:deleted] }
  end
end

#delete(kind, key, version) ⇒ Object 



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# File 'lib/ldclient-rb/in_memory_store.rb', line 55

def delete(kind, key, version)
  @lock.with_write_lock do
    coll = @items[kind]
    if coll.nil?
      coll = Hash.new
      @items[kind] = coll
    end
    old = coll[key.to_sym]

    if old.nil? || old[:version] < version
      coll[key.to_sym] = { deleted: true, version: version }
    end
  end
end

#get(kind, key) ⇒ Object 



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# File 'lib/ldclient-rb/in_memory_store.rb', line 40

def get(kind, key)
  @lock.with_read_lock do
    coll = @items[kind]
    f = coll.nil? ? nil : coll[key.to_sym]
    (f.nil? || f[:deleted]) ? nil : f
  end
end

#init(all_data) ⇒ Object 



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# File 'lib/ldclient-rb/in_memory_store.rb', line 70

def init(all_data)
  @lock.with_write_lock do
    @items.replace(all_data)
    @initialized.make_true
  end
end

#initialized? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/ldclient-rb/in_memory_store.rb', line 92

def initialized?
  @initialized.value
end

#stop ⇒ Object 



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# File 'lib/ldclient-rb/in_memory_store.rb', line 96

def stop
  # nothing to do
end

#upsert(kind, item) ⇒ Object 



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# File 'lib/ldclient-rb/in_memory_store.rb', line 77

def upsert(kind, item)
  @lock.with_write_lock do
    coll = @items[kind]
    if coll.nil?
      coll = Hash.new
      @items[kind] = coll
    end
    old = coll[item[:key].to_sym]

    if old.nil? || old[:version] < item[:version]
      coll[item[:key].to_sym] = item
    end
  end
end