Class: Longleaf::MetadataPersistenceManager

Inherits:
Object
  • Object
show all
Defined in:
lib/longleaf/services/metadata_persistence_manager.rb

Overview

Handles the persistence of metadata records

Instance Method Summary collapse

Constructor Details

#initialize(index_manager) ⇒ MetadataPersistenceManager

Initialize the MetadataPersistenceManager



10
11
12
 
# File 'lib/longleaf/services/metadata_persistence_manager.rb', line 10

def initialize(index_manager)
  @index_manager = index_manager
end

Instance Method Details

#index(file_rec) ⇒ Object

Index metadata for the provided file record



31
32
33
34
35
 
# File 'lib/longleaf/services/metadata_persistence_manager.rb', line 31

def index(file_rec)
  if @index_manager.using_index?
    @index_manager.index(file_rec)
  end
end

#load(file_rec) ⇒ MetadataRecord

Load the metadata record for the provided file record



40
41
42
43
44
45
 
# File 'lib/longleaf/services/metadata_persistence_manager.rb', line 40

def load(file_rec)
  md_rec = MetadataDeserializer.deserialize(file_path: file_rec.metadata_path,
              digest_algs: file_rec.storage_location.metadata_location.digests)
  file_rec.metadata_record = md_rec
  md_rec
end

#persist(file_rec) ⇒ Object

Persist the metadata for the provided file record to all configured destinations. This may include to disk as well as to an index.



17
18
19
20
21
22
23
24
25
26
27
 
# File 'lib/longleaf/services/metadata_persistence_manager.rb', line 17

def persist(file_rec)
  if file_rec.metadata_record.nil?
    raise MetadataError.new("No metadata record provided, cannot persist metadata for #{file_rec.path}")
  end

  MetadataSerializer::write(metadata: file_rec.metadata_record,
      file_path: file_rec.metadata_path,
      digest_algs: file_rec.storage_location.metadata_location.digests)

  index(file_rec)
end