Class: SolidObjects::Lease

Inherits:
Object
  • Object
show all
Defined in:
lib/solid_objects/lease.rb,
sig/generated/lib/solid_objects/lease.rbs

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(instance_id:, owner_id:, generation:, expires_at:, database_adapter:) ⇒ Lease

Returns a new instance of Lease.

RBS:

  • (instance_id: Integer, owner_id: String, generation: Integer, expires_at: Time, database_adapter: DatabaseAdapter) -> void

Parameters:

  • instance_id: (Integer)
  • owner_id: (String)
  • generation: (Integer)
  • expires_at: (Time)
  • database_adapter: (DatabaseAdapter) 


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# File 'lib/solid_objects/lease.rb', line 78

def initialize(instance_id:, owner_id:, generation:, expires_at:, database_adapter:)
  @instance_id = instance_id
  @owner_id = owner_id
  @generation = generation
  @expires_at = expires_at
  @database_adapter = database_adapter
end

Instance Attribute Details

#database_adapter ⇒ Object (readonly)

Returns the value of attribute database_adapter.

Returns:

  • (Object) 


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# File 'lib/solid_objects/lease.rb', line 147

def database_adapter
  @database_adapter
end

#expires_at ⇒ Object (readonly)

RBS:

  • @instance_id: Integer

  • @owner_id: String

  • @generation: Integer

  • @expires_at: Time

  • @database_adapter: DatabaseAdapter

Returns:

  • (Object) 


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# File 'lib/solid_objects/lease.rb', line 75

def expires_at
  @expires_at
end

#generation ⇒ Object (readonly)

RBS:

  • @instance_id: Integer

  • @owner_id: String

  • @generation: Integer

  • @expires_at: Time

  • @database_adapter: DatabaseAdapter

Returns:

  • (Object) 


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# File 'lib/solid_objects/lease.rb', line 75

def generation
  @generation
end

#instance_id ⇒ Object (readonly)

RBS:

  • @instance_id: Integer

  • @owner_id: String

  • @generation: Integer

  • @expires_at: Time

  • @database_adapter: DatabaseAdapter

Returns:

  • (Object) 


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# File 'lib/solid_objects/lease.rb', line 75

def instance_id
  @instance_id
end

#owner_id ⇒ Object (readonly)

RBS:

  • @instance_id: Integer

  • @owner_id: String

  • @generation: Integer

  • @expires_at: Time

  • @database_adapter: DatabaseAdapter

Returns:

  • (Object) 


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# File 'lib/solid_objects/lease.rb', line 75

def owner_id
  @owner_id
end

Class Method Details

.acquire(instance_id:, owner_id:, duration: SolidObjects.configuration.lease_duration, database_adapter: SolidObjects.database_adapter) ⇒ Lease?

RBS:

  • (instance_id: Integer, owner_id: String, ?duration: Numeric, ?database_adapter: DatabaseAdapter) -> Lease?

Parameters:

  • instance_id: (Integer)
  • owner_id: (String)
  • duration: (Numeric) (defaults to: SolidObjects.configuration.lease_duration)
  • database_adapter: (DatabaseAdapter) (defaults to: SolidObjects.database_adapter)

Returns:



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# File 'lib/solid_objects/lease.rb', line 34

def acquire(
  instance_id:,
  owner_id:,
  duration: SolidObjects.configuration.lease_duration,
  database_adapter: SolidObjects.database_adapter
)
  lease = database_adapter.transaction do
    instance = Instance.lock.find(instance_id)
    now = database_adapter.database_now
    claim(instance:, owner_id:, now:, duration:, database_adapter:)
  end

  if lease
    SolidObjects.instrument(
      :"activation.claimed",
      instance_id:,
      owner_id:,
      generation: lease.generation
    )
  end

  lease
end

.claim(instance:, owner_id:, now:, database_adapter:, duration: SolidObjects.configuration.lease_duration) ⇒ Lease?

RBS:

  • (instance: Instance, owner_id: String, now: Time, ?duration: Numeric, database_adapter: DatabaseAdapter) -> Lease?

Parameters:

  • instance: (Instance)
  • owner_id: (String)
  • now: (Time)
  • database_adapter: (DatabaseAdapter)
  • duration: (Numeric) (defaults to: SolidObjects.configuration.lease_duration)

Returns:



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# File 'lib/solid_objects/lease.rb', line 7

def claim(
  instance:,
  owner_id:,
  now:,
  database_adapter:, duration: SolidObjects.configuration.lease_duration
)
  return if held_by_another_live_owner?(instance, owner_id, now)

  generation = instance.activation_generation + 1
  expires_at = now + duration
  instance.update!(
    activation_owner_id: owner_id,
    activation_expires_at: expires_at,
    activation_generation: generation,
    activated_at: now,
    last_claimed_at: now
  )
  new(
    instance_id: instance.id,
    owner_id:,
    generation:,
    expires_at:,
    database_adapter:
  )
end

Instance Method Details

#fenced_transaction {|arg0| ... } ⇒ Object

RBS:

  • () { (Instance) -> untyped } -> untyped

Yields:

Yield Parameters:

Yield Returns:

  • (Object)

Returns:

  • (Object) 


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# File 'lib/solid_objects/lease.rb', line 137

def fenced_transaction
  database_adapter.transaction do
    instance = locked_owned_instance!
    verify_unexpired!(instance, database_adapter.database_now)
    yield instance
  end
end

#locked_owned_instance! ⇒ Instance

RBS:

  • () -> Instance

Returns:



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# File 'lib/solid_objects/lease.rb', line 150

def locked_owned_instance!
  instance = Instance.lock.find_by(id: instance_id)
  raise ActorDestroyed, "actor instance no longer exists" unless instance

  instance.tap do
    raise LostActivation, "activation owner or generation changed" unless owned_generation?(instance)
  end
end

#owned_generation?(instance) ⇒ Boolean

RBS:

  • (Instance) -> bool

Parameters:

Returns:

  • (Boolean) 


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# File 'lib/solid_objects/lease.rb', line 160

def owned_generation?(instance)
  instance.activation_owner_id == owner_id &&
    instance.activation_generation == generation
end

#release ⇒ Boolean

RBS:

  • () -> bool

Returns:

  • (Boolean) 


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# File 'lib/solid_objects/lease.rb', line 114

def release
  released = database_adapter.transaction do
    instance = Instance.lock.find_by(id: instance_id)
    next false unless instance
    next false unless owned_generation?(instance)

    instance.update!(activation_owner_id: nil, activation_expires_at: nil)
    true
  end

  if released
    SolidObjects.instrument(
      :"activation.released",
      instance_id:,
      owner_id:,
      generation:
    )
  end

  released
end

#renew(duration: SolidObjects.configuration.lease_duration) ⇒ Lease

RBS:

  • (?duration: Numeric) -> Lease

Parameters:

  • duration: (Numeric) (defaults to: SolidObjects.configuration.lease_duration)

Returns:



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# File 'lib/solid_objects/lease.rb', line 87

def renew(duration: SolidObjects.configuration.lease_duration)
  renewed_lease = database_adapter.transaction do
    instance = locked_owned_instance!
    now = database_adapter.database_now
    verify_unexpired!(instance, now)
    renewed_expiration = now + duration
    instance.update!(activation_expires_at: renewed_expiration)

    self.class.new(
      instance_id:,
      owner_id:,
      generation:,
      expires_at: renewed_expiration,
      database_adapter:
    )
  end
  SolidObjects.instrument(
    :"activation.renewed",
    instance_id:,
    owner_id:,
    generation:,
    expires_at: renewed_lease.expires_at
  )
  renewed_lease
end

#verify_unexpired!(instance, now) ⇒ void

This method returns an undefined value.

RBS:

  • (Instance, Time) -> void

Parameters:



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# File 'lib/solid_objects/lease.rb', line 166

def verify_unexpired!(instance, now)
  return if instance.activation_expires_at && instance.activation_expires_at > now

  raise LostActivation, "activation lease expired"
end