Class: EntitySnapshot::Postgres

Inherits:
Object
  • Object
show all
Includes:
EntityCache::Store::External, Get, StreamName, Log::Dependency
Defined in:
lib/entity_snapshot/postgres/get.rb,
lib/entity_snapshot/postgres/log.rb,
lib/entity_snapshot/postgres/postgres.rb,
lib/entity_snapshot/postgres/read_only.rb,
lib/entity_snapshot/postgres/controls/id.rb,
lib/entity_snapshot/postgres/stream_name.rb,
lib/entity_snapshot/postgres/controls/time.rb,
lib/entity_snapshot/postgres/controls/batch.rb,
lib/entity_snapshot/postgres/controls/write.rb,
lib/entity_snapshot/postgres/controls/entity.rb,
lib/entity_snapshot/postgres/controls/message.rb,
lib/entity_snapshot/postgres/controls/subject.rb,
lib/entity_snapshot/postgres/controls/version.rb,
lib/entity_snapshot/postgres/controls/category.rb,
lib/entity_snapshot/postgres/controls/snapshot.rb,
lib/entity_snapshot/postgres/controls/specifier.rb,
lib/entity_snapshot/postgres/controls/stream_name.rb,
lib/entity_snapshot/postgres/controls/entity_store.rb,
lib/entity_snapshot/postgres/controls/random_value.rb,
lib/entity_snapshot/postgres/controls/snapshot/put.rb,
lib/entity_snapshot/postgres/controls/snapshot/read_only.rb

Defined Under Namespace

Modules: Controls, Get, StreamName Classes: Log, ReadOnly

Constant Summary collapse

Error = 
Class.new(RuntimeError)

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Methods included from StreamName

category, #snapshot_stream_name

Methods included from Get

#entity_class, #get, prepended

Instance Attribute Details

#session ⇒ Object

Returns the value of attribute session.



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# File 'lib/entity_snapshot/postgres/postgres.rb', line 13

def session
  @session
end

Class Method Details

.assure(store) ⇒ Object 



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# File 'lib/entity_snapshot/postgres/postgres.rb', line 58

def self.assure(store)
  if [store.snapshot_class, store.snapshot_interval].include?(nil)
    raise EntityCache::Store::External::Error
  end
end

Instance Method Details

#category ⇒ Object 



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# File 'lib/entity_snapshot/postgres/postgres.rb', line 15

def category
  StreamName.category(entity_class, specifier)
end

#configure(session: nil) ⇒ Object 



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# File 'lib/entity_snapshot/postgres/postgres.rb', line 19

def configure(session: nil)
  MessageStore::Postgres::Session.configure(self, session: session)
  MessageStore::Postgres::Put.configure(self, session: self.session, attr_name: :write)
  MessageStore::Postgres::Get::Stream::Last.configure(self, session: self.session, attr_name: :read)
end

#put(id, entity, version, time) ⇒ Object 



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# File 'lib/entity_snapshot/postgres/postgres.rb', line 25

def put(id, entity, version, time)
  unless entity.is_a?(entity_class)
    error_msg = "Persistent storage for #{entity_class} cannot store #{entity}"
    logger.error() { error_msg }
    raise Error, error_msg
  end

  stream_name = snapshot_stream_name(id)

  logger.trace(tags: [:cache, :put]) { "Writing snapshot (Stream: #{stream_name.inspect}, Entity Class: #{entity.class.name}, Version: #{version.inspect}, Time: #{time.utc.iso8601(3)})" }

  entity_data = Transform::Write.raw_data(entity)

  event_data = MessageStore::MessageData::Write.new

  iso8601_time = Clock::UTC.iso8601(time)

  data = {
    entity_data: entity_data,
    entity_version: version,
    time: iso8601_time
  }

  event_data.type = 'Recorded'
  event_data.data = data

  position = write.(event_data, stream_name)

  logger.debug(tags: [:cache, :put]) { "Wrote snapshot (Stream: #{stream_name.inspect}, Entity Class: #{entity.class.name}, Version: #{version.inspect}, Time: #{time.utc.iso8601(3)})" }

  position
end