Class: Cosmos::Model

Inherits:
Object show all
Defined in:
lib/cosmos/models/model.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(primary_key, **kw_args) ⇒ Model

Store the primary key and keyword arguments



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# File 'lib/cosmos/models/model.rb', line 125

def initialize(primary_key, **kw_args)
  @primary_key = primary_key
  @name = kw_args[:name]
  @updated_at = kw_args[:updated_at]
  @plugin = kw_args[:plugin]
  @scope = kw_args[:scope]
  @destroyed = false
end

Instance Attribute Details

#name ⇒ Object

Returns the value of attribute name.



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# File 'lib/cosmos/models/model.rb', line 25

def name
  @name
end

#plugin ⇒ Object

Returns the value of attribute plugin.



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# File 'lib/cosmos/models/model.rb', line 27

def plugin
  @plugin
end

#scope ⇒ Object

Returns the value of attribute scope.



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# File 'lib/cosmos/models/model.rb', line 28

def scope
  @scope
end

#updated_at ⇒ Object

Returns the value of attribute updated_at.



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# File 'lib/cosmos/models/model.rb', line 26

def updated_at
  @updated_at
end

Class Method Details

.all(primary_key) ⇒ Array<Hash>

Returns All the models (as Hash objects) stored under the primary key.

Returns:

  • (Array<Hash>) —

    All the models (as Hash objects) stored under the primary key



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# File 'lib/cosmos/models/model.rb', line 53

def self.all(primary_key)
  hash = store.hgetall(primary_key)
  hash.each do |key, value|
    hash[key] = JSON.parse(value)
  end
  hash
end

.filter(key, value, scope:) ⇒ Object

Loops over all items and returns objects that match a key value pair



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# File 'lib/cosmos/models/model.rb', line 63

def self.filter(key, value, scope:)
  filtered = {}
  results = all(scope: scope)
  results.each do |name, result|
    if result[key] == value
      filtered[name] = result
    end
  end
  return filtered
end

.find_all_by_plugin(plugin:, scope:) ⇒ Array<Object>

Returns All the models (as Model objects) stored under the primary key which have the plugin attribute.

Returns:

  • (Array<Object>) —

    All the models (as Model objects) stored under the primary key which have the plugin attribute



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# File 'lib/cosmos/models/model.rb', line 111

def self.find_all_by_plugin(plugin:, scope:)
  result = {}
  models = get_all_models(scope: scope)
  models.each do |name, model|
    result[name] = model if model.plugin == plugin
  end
  result
end

.from_json(json, scope:) ⇒ Model

Returns Model generated from the passed JSON.

Returns:

  • (Model) —

    Model generated from the passed JSON



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# File 'lib/cosmos/models/model.rb', line 82

def self.from_json(json, scope:)
  json = JSON.parse(json) if String === json
  raise "json data is nil" if json.nil?

  json[:scope] = scope
  json.transform_keys!(&:to_sym)
  self.new(**json, scope: scope)
end

.get(primary_key, name:) ⇒ Hash|nil

Returns Hash of this model or nil if name not found under primary_key.

Returns:

  • (Hash|nil) —

    Hash of this model or nil if name not found under primary_key



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# File 'lib/cosmos/models/model.rb', line 38

def self.get(primary_key, name:)
  json = store.hget(primary_key, name)
  if json
    return JSON.parse(json)
  else
    return nil
  end
end

.get_all_models(scope:) ⇒ Array<Object>

Returns All the models (as Model objects) stored under the primary key.

Returns:

  • (Array<Object>) —

    All the models (as Model objects) stored under the primary key



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# File 'lib/cosmos/models/model.rb', line 103

def self.get_all_models(scope:)
  models = {}
  all(scope: scope).each { |name, json| models[name] = from_json(json, scope: scope) }
  models
end

.get_model(name:, scope:) ⇒ Object|nil

Calls self.get and then from_json to turn the Hash configuration into a Ruby Model object.

Returns:

  • (Object|nil) —

    Model object or nil if name not found under primary_key



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# File 'lib/cosmos/models/model.rb', line 93

def self.get_model(name:, scope:)
  json = get(name: name, scope: scope)
  if json
    return from_json(json, scope: scope)
  else
    return nil
  end
end

.handle_config(parser, model, keyword, parameters) ⇒ Object 



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# File 'lib/cosmos/models/model.rb', line 120

def self.handle_config(parser, model, keyword, parameters)
  raise "must be implemented by subclass"
end

.names(primary_key) ⇒ Array<String>

Returns All the names stored under the primary key.

Returns:

  • (Array<String>) —

    All the names stored under the primary key



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# File 'lib/cosmos/models/model.rb', line 48

def self.names(primary_key)
  store.hkeys(primary_key).sort
end

.set(json, scope:) ⇒ Object

Sets (updates) the redis hash of this model



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# File 'lib/cosmos/models/model.rb', line 75

def self.set(json, scope:)
  json[:scope] = scope
  json.transform_keys!(&:to_sym)
  self.new(**json).create(force: true)
end

.store ⇒ Object 



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# File 'lib/cosmos/models/model.rb', line 30

def self.store
  Store
end

Instance Method Details

#as_config ⇒ Object

TODO: Not currently used but may be used by a XTCE or other format to COSMOS conversion



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# File 'lib/cosmos/models/model.rb', line 186

def as_config
  ""
end

#as_json ⇒ Hash

Returns JSON encoding of this model.

Returns:

  • (Hash) —

    JSON encoding of this model



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# File 'lib/cosmos/models/model.rb', line 178

def as_json
  { 'name' => @name,
    'updated_at' => @updated_at,
    'plugin' => @plugin,
    'scope' => @scope }
end

#create(update: false, force: false) ⇒ Object

Update the Redis hash at primary_key and set the field “name” to the JSON generated via calling as_json



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# File 'lib/cosmos/models/model.rb', line 136

def create(update: false, force: false)
  unless force
    existing = self.class.store.hget(@primary_key, @name)
    if existing
      raise "#{@primary_key}:#{@name} already exists at create" unless update
    else
      raise "#{@primary_key}:#{@name} doesn't exist at update" if update
    end
  end
  @updated_at = Time.now.to_nsec_from_epoch
  self.class.store.hset(@primary_key, @name, JSON.generate(self.as_json))
end

#deploy(gem_path, variables) ⇒ Object

Deploy the model into the COSMOS system. Subclasses must implement this and typically create MicroserviceModels to implement.



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# File 'lib/cosmos/models/model.rb', line 156

def deploy(gem_path, variables)
  raise "must be implemented by subclass"
end

#destroy ⇒ Object

Delete the model from the Store



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# File 'lib/cosmos/models/model.rb', line 166

def destroy
  @destroyed = true
  undeploy()
  self.class.store.hdel(@primary_key, @name)
end

#destroyed? ⇒ Boolean

Indicate if destroy has been called

Returns:

  • (Boolean) 


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# File 'lib/cosmos/models/model.rb', line 173

def destroyed?
  @destroyed
end

#undeploy ⇒ Object

Undo the actions of deploy and remove the model from COSMOS. Subclasses must implement this as by default it is a noop.



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# File 'lib/cosmos/models/model.rb', line 162

def undeploy
end

#update ⇒ Object

Alias for create(update: true)



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# File 'lib/cosmos/models/model.rb', line 150

def update
  create(update: true)
end