diff options
Diffstat (limited to 'activerecord/lib/active_record/connection_adapters/abstract_adapter.rb')
| -rw-r--r-- | activerecord/lib/active_record/connection_adapters/abstract_adapter.rb | 150 |
1 files changed, 90 insertions, 60 deletions
diff --git a/activerecord/lib/active_record/connection_adapters/abstract_adapter.rb b/activerecord/lib/active_record/connection_adapters/abstract_adapter.rb index 4c3a8f7233..c6faae77cc 100644 --- a/activerecord/lib/active_record/connection_adapters/abstract_adapter.rb +++ b/activerecord/lib/active_record/connection_adapters/abstract_adapter.rb @@ -3,29 +3,34 @@ require 'bigdecimal' require 'bigdecimal/util' require 'active_support/core_ext/benchmark' require 'active_support/deprecation' +require 'active_record/connection_adapters/schema_cache' +require 'monitor' module ActiveRecord module ConnectionAdapters # :nodoc: extend ActiveSupport::Autoload autoload :Column + autoload :ConnectionSpecification - autoload_under 'abstract' do - autoload :IndexDefinition, 'active_record/connection_adapters/abstract/schema_definitions' - autoload :ColumnDefinition, 'active_record/connection_adapters/abstract/schema_definitions' - autoload :TableDefinition, 'active_record/connection_adapters/abstract/schema_definitions' - autoload :Table, 'active_record/connection_adapters/abstract/schema_definitions' + autoload_at 'active_record/connection_adapters/abstract/schema_definitions' do + autoload :IndexDefinition + autoload :ColumnDefinition + autoload :TableDefinition + autoload :Table + end + + autoload_at 'active_record/connection_adapters/abstract/connection_pool' do + autoload :ConnectionHandler + autoload :ConnectionManagement + end + autoload_under 'abstract' do autoload :SchemaStatements autoload :DatabaseStatements autoload :DatabaseLimits autoload :Quoting - autoload :ConnectionPool - autoload :ConnectionHandler, 'active_record/connection_adapters/abstract/connection_pool' - autoload :ConnectionManagement, 'active_record/connection_adapters/abstract/connection_pool' - autoload :ConnectionSpecification - autoload :QueryCache end @@ -47,39 +52,49 @@ module ActiveRecord include DatabaseLimits include QueryCache include ActiveSupport::Callbacks + include MonitorMixin define_callbacks :checkout, :checkin - attr_accessor :visitor - - def initialize(connection, logger = nil) #:nodoc: - @active = nil - @connection, @logger = connection, logger + attr_accessor :visitor, :pool + attr_reader :schema_cache, :last_use, :in_use, :logger + alias :in_use? :in_use + + def initialize(connection, logger = nil, pool = nil) #:nodoc: + super() + + @active = nil + @connection = connection + @in_use = false + @instrumenter = ActiveSupport::Notifications.instrumenter + @last_use = false + @logger = logger + @open_transactions = 0 + @pool = pool + @query_cache = Hash.new { |h,sql| h[sql] = {} } @query_cache_enabled = false - @query_cache = Hash.new { |h,sql| h[sql] = {} } - @open_transactions = 0 - @instrumenter = ActiveSupport::Notifications.instrumenter - @visitor = nil - end - - # Returns a visitor instance for this adaptor, which conforms to the Arel::ToSql interface - def self.visitor_for(pool) # :nodoc: - adapter = pool.spec.config[:adapter] - - if Arel::Visitors::VISITORS[adapter] - ActiveSupport::Deprecation.warn( - "Arel::Visitors::VISITORS is deprecated and will be removed. Database adapters " \ - "should define a visitor_for method which returns the appropriate visitor for " \ - "the database. For example, MysqlAdapter.visitor_for(pool) returns " \ - "Arel::Visitors::MySQL.new(pool)." - ) - - Arel::Visitors::VISITORS[adapter].new(pool) - else - Arel::Visitors::ToSql.new(pool) + @schema_cache = SchemaCache.new self + @visitor = nil + end + + def lease + synchronize do + unless in_use + @in_use = true + @last_use = Time.now + end end end + def schema_cache=(cache) + cache.connection = self + @schema_cache = cache + end + + def expire + @in_use = false + end + # Returns the human-readable name of the adapter. Use mixed case - one # can always use downcase if needed. def adapter_name @@ -130,17 +145,28 @@ module ActiveRecord false end - # QUOTING ================================================== + # Does this adapter support index sort order? + def supports_index_sort_order? + false + end + + # Does this adapter support partial indices? + def supports_partial_index? + false + end - # Override to return the quoted table name. Defaults to column quoting. - def quote_table_name(name) - quote_column_name(name) + # Does this adapter support explain? As of this writing sqlite3, + # mysql2, and postgresql are the only ones that do. + def supports_explain? + false end + # QUOTING ================================================== + # Returns a bind substitution value given a +column+ and list of current # +binds+ def substitute_at(column, index) - Arel.sql '?' + Arel::Nodes::BindParam.new '?' end # REFERENTIAL INTEGRITY ==================================== @@ -246,28 +272,32 @@ module ActiveRecord "active_record_#{open_transactions}" end - protected + # Check the connection back in to the connection pool + def close + pool.checkin self + end - def log(sql, name = "SQL", binds = []) - @instrumenter.instrument( - "sql.active_record", - :sql => sql, - :name => name, - :connection_id => object_id, - :binds => binds) { yield } - rescue Exception => e - message = "#{e.class.name}: #{e.message}: #{sql}" - @logger.debug message if @logger - exception = translate_exception(e, message) - exception.set_backtrace e.backtrace - raise exception - end + protected - def translate_exception(e, message) - # override in derived class - ActiveRecord::StatementInvalid.new(message) - end + def log(sql, name = "SQL", binds = []) + @instrumenter.instrument( + "sql.active_record", + :sql => sql, + :name => name, + :connection_id => object_id, + :binds => binds) { yield } + rescue Exception => e + message = "#{e.class.name}: #{e.message}: #{sql}" + @logger.error message if @logger + exception = translate_exception(e, message) + exception.set_backtrace e.backtrace + raise exception + end + def translate_exception(exception, message) + # override in derived class + ActiveRecord::StatementInvalid.new(message) + end end end end |