Class: ForestAdminRpcAgent::Routes::Schema

Inherits:
BaseRoute
  • Object
show all
Includes:
ForestAdminAgent::Routes::QueryHandler, ForestAdminAgent::Utils, ForestAdminDatasourceToolkit::Components::Query::ConditionTree
Defined in:
lib/forest_admin_rpc_agent/routes/schema.rb

Constant Summary collapse

HTTP_OK = 
200
HTTP_NOT_MODIFIED = 
304

Instance Method Summary collapse

Methods inherited from BaseRoute

#build_rails_response, #register_rails, #register_sinatra, #registered

Constructor Details

#initialize ⇒ Schema

Returns a new instance of Schema.



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# File 'lib/forest_admin_rpc_agent/routes/schema.rb', line 11

def initialize
  super('rpc-schema', 'get', 'rpc_schema')
end

Instance Method Details

#handle_request(args) ⇒ Object 



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# File 'lib/forest_admin_rpc_agent/routes/schema.rb', line 15

def handle_request(args)
  agent = ForestAdminRpcAgent::Agent.instance
  client_etag = extract_if_none_match(args)

  # If client has cached schema and ETag matches, return 304 Not Modified
  if client_etag && agent.schema_hash_matches?(client_etag)
    ForestAdminRpcAgent::Facades::Container.logger.log(
      'Debug',
      'ETag matches, returning 304 Not Modified'
    )
    return { status: HTTP_NOT_MODIFIED, content: nil,
             headers: { 'ETag' => quote_etag(agent.cached_schema_hash) } }
  end

  # Get schema from cache (or build from datasource if not cached)
  schema = agent.rpc_schema
  etag = agent.cached_schema_hash

  # Return schema with ETag header
  {
    status: HTTP_OK,
    content: schema,
    headers: { 'ETag' => quote_etag(etag) }
  }
end