Class: ActiveRecord::ConnectionAdapters::JdbcAdapter

Inherits:
AbstractAdapter
  • Object
show all
Extended by:
ShadowCoreMethods
Includes:
CompatibilityMethods, JdbcConnectionPoolCallbacks
Defined in:
lib/arjdbc/jdbc/adapter.rb

Direct Known Subclasses

MysqlAdapter, PostgreSQLAdapter, SQLite3Adapter

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Methods included from ShadowCoreMethods

alias_chained_method

Methods included from JdbcConnectionPoolCallbacks

included, needed?, #on_checkin, #on_checkout

Methods included from CompatibilityMethods

needed?, #quote_table_name

Constructor Details

#initialize(connection, logger, config) ⇒ JdbcAdapter

Returns a new instance of JdbcAdapter.



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# File 'lib/arjdbc/jdbc/adapter.rb', line 26

def initialize(connection, logger, config)
  @config = config
  spec = config[:adapter_spec] || adapter_spec(config)
  config[:adapter_spec] ||= spec
  unless connection
    connection_class = jdbc_connection_class spec
    connection = connection_class.new config
  end
  super(connection, logger)
  if spec && (config[:adapter_class].nil? || config[:adapter_class] == JdbcAdapter)
    extend spec
  end
  configure_arel2_visitors(config)
  connection.adapter = self
  JndiConnectionPoolCallbacks.prepare(self, connection)
end

Instance Attribute Details

#config ⇒ Object (readonly)

Returns the value of attribute config.



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# File 'lib/arjdbc/jdbc/adapter.rb', line 24

def config
  @config
end

Class Method Details

.arel2_visitors(config) ⇒ Object 



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# File 'lib/arjdbc/jdbc/adapter.rb', line 106

def self.arel2_visitors(config)
  { 'jdbc' => ::Arel::Visitors::ToSql }
end

.visitor_for(pool) ⇒ Object 



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# File 'lib/arjdbc/jdbc/adapter.rb', line 95

def self.visitor_for(pool)
  config = pool.spec.config
  adapter = config[:adapter]
  adapter_spec = config[:adapter_spec] || self
  if adapter =~ /^(jdbc|jndi)$/
    adapter_spec.arel2_visitors(config).values.first.new(pool)
  else
    adapter_spec.arel2_visitors(config)[adapter].new(pool)
  end
end

Instance Method Details

#_execute(sql, name = nil) ⇒ Object

we need to do it this way, to allow Rails stupid tests to always work even if we define a new execute method. Instead of mixing in a new execute, an _execute should be mixed in.



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# File 'lib/arjdbc/jdbc/adapter.rb', line 216

def _execute(sql, name = nil)
  @connection.execute(sql)
end

#active? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/arjdbc/jdbc/adapter.rb', line 181

def active?
  @connection.active?
end

#adapter_name ⇒ Object

:nodoc:



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# File 'lib/arjdbc/jdbc/adapter.rb', line 91

def adapter_name #:nodoc:
  'JDBC'
end

#adapter_spec(config) ⇒ Object

Locate specialized adapter specification if one exists based on config data



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# File 'lib/arjdbc/jdbc/adapter.rb', line 59

def adapter_spec(config)
  2.times do
    dialect = (config[:dialect] || config[:driver]).to_s
    ::ArJdbc.constants.map { |name| ::ArJdbc.const_get name }.each do |constant|
      if constant.respond_to? :adapter_matcher
        spec = constant.adapter_matcher(dialect, config)
        return spec if spec
      end
    end

    # If nothing matches and we're using jndi, try to automatically detect the database.
    break unless config[:jndi] and !config[:dialect]
    begin
      conn = Java::javax.naming.InitialContext.new.lookup(config[:jndi]).getConnection
      config[:dialect] = conn.getMetaData.getDatabaseProductName

      # Derby-specific hack
      if ::ArJdbc::Derby.adapter_matcher(config[:dialect], config)
        # Needed to set the correct database schema name
        config[:username] ||= conn.getMetaData.getUserName
      end
    rescue
      conn.close if conn
    end
  end
  nil
end

#begin_db_transaction ⇒ Object 



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# File 'lib/arjdbc/jdbc/adapter.rb', line 305

def begin_db_transaction
  @connection.begin
end

#commit_db_transaction ⇒ Object 



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# File 'lib/arjdbc/jdbc/adapter.rb', line 309

def commit_db_transaction
  @connection.commit
end

#configure_arel2_visitors(config) ⇒ Object 



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# File 'lib/arjdbc/jdbc/adapter.rb', line 110

def configure_arel2_visitors(config)
  if defined?(::Arel::Visitors::VISITORS)
    visitors = ::Arel::Visitors::VISITORS
    visitor = nil
    adapter_spec = config[:adapter_spec] || self
    adapter_spec.arel2_visitors(config).each do |k,v|
      visitor = v
      visitors[k] = v
    end
    if visitor && config[:adapter] =~ /^(jdbc|jndi)$/
      visitors[config[:adapter]] = visitor
    end
  end
end

#database_name ⇒ Object

:nodoc:



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# File 'lib/arjdbc/jdbc/adapter.rb', line 142

def database_name #:nodoc:
  @connection.database_name
end

#disconnect! ⇒ Object 



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# File 'lib/arjdbc/jdbc/adapter.rb', line 190

def disconnect!
  @connection.disconnect!
end

#exec_delete(sql, name, binds) ⇒ Object

Executes delete sql statement in the context of this connection using binds as the bind substitutes. name is the logged along with the executed sql statement.



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# File 'lib/arjdbc/jdbc/adapter.rb', line 277

def exec_delete(sql, name, binds)
  exec_query(sql, name, binds)
end

#exec_insert(sql, name, binds) ⇒ Object

Executes insert sql statement in the context of this connection using binds as the bind substitutes. name is the logged along with the executed sql statement.



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# File 'lib/arjdbc/jdbc/adapter.rb', line 270

def exec_insert(sql, name, binds)
  exec_query(sql, name, binds)
end

#exec_query(sql, name = 'SQL', binds = []) ⇒ Object

Executes sql statement in the context of this connection using binds as the bind substitutes. name is logged along with the executed sql statement.



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# File 'lib/arjdbc/jdbc/adapter.rb', line 263

def exec_query(sql, name = 'SQL', binds = [])
  execute(sql, name, binds)
end

#exec_update(sql, name, binds) ⇒ Object

Executes update sql statement in the context of this connection using binds as the bind substitutes. name is the logged along with the executed sql statement.



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# File 'lib/arjdbc/jdbc/adapter.rb', line 284

def exec_update(sql, name, binds)
  exec_query(sql, name, binds)
end

#execute(sql, name = nil, binds = []) ⇒ Object 



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# File 'lib/arjdbc/jdbc/adapter.rb', line 204

def execute(sql, name = nil, binds = [])
  sql = substitute_binds(sql, binds)
  if name == :skip_logging
    _execute(sql)
  else
    log(sql, name) { _execute(sql) }
  end
end

#indexes(table_name, name = nil, schema_name = nil) ⇒ Object 



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# File 'lib/arjdbc/jdbc/adapter.rb', line 301

def indexes(table_name, name = nil, schema_name = nil)
  @connection.indexes(table_name, name, schema_name)
end

#insert_sql(sql, name = nil, pk = nil, id_value = nil, sequence_name = nil, binds = []) ⇒ Object 



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# File 'lib/arjdbc/jdbc/adapter.rb', line 253

def insert_sql(sql, name = nil, pk = nil, id_value = nil, sequence_name = nil, binds = [])
  id = execute(sql, name = nil, binds)
  id_value || id
end

#is_a?(klass) ⇒ Boolean

:nodoc:

Returns:

  • (Boolean) 


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# File 'lib/arjdbc/jdbc/adapter.rb', line 125

def is_a?(klass)          # :nodoc:
  # This is to fake out current_adapter? conditional logic in AR tests
  if Class === klass && klass.name =~ /#{adapter_name}Adapter$/i
    true
  else
    super
  end
end

#jdbc_column_class ⇒ Object 



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# File 'lib/arjdbc/jdbc/adapter.rb', line 49

def jdbc_column_class
  ActiveRecord::ConnectionAdapters::JdbcColumn
end

#jdbc_columns(table_name, name = nil) ⇒ Object 



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# File 'lib/arjdbc/jdbc/adapter.rb', line 288

def jdbc_columns(table_name, name = nil)
  @connection.columns(table_name.to_s)
end

#jdbc_connection ⇒ Object

Retrieve the raw java.sql.Connection object.



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# File 'lib/arjdbc/jdbc/adapter.rb', line 54

def jdbc_connection
  raw_connection.connection
end

#jdbc_connection_class(spec) ⇒ Object 



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# File 'lib/arjdbc/jdbc/adapter.rb', line 43

def jdbc_connection_class(spec)
  connection_class = spec.jdbc_connection_class if spec && spec.respond_to?(:jdbc_connection_class)
  connection_class = ::ActiveRecord::ConnectionAdapters::JdbcConnection unless connection_class
  connection_class
end

#jdbc_insert(sql, name = nil, pk = nil, id_value = nil, sequence_name = nil, binds = []) ⇒ Object 



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# File 'lib/arjdbc/jdbc/adapter.rb', line 220

def jdbc_insert(sql, name = nil, pk = nil, id_value = nil, sequence_name = nil, binds = [])
  insert_sql(sql, name, pk, id_value, sequence_name, binds)
end

#jdbc_select_all(sql, name = nil, binds = []) ⇒ Object 



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# File 'lib/arjdbc/jdbc/adapter.rb', line 227

def jdbc_select_all(sql, name = nil, binds = [])
  select(sql, name, binds)
end

#jdbc_update(sql, name = nil, binds = []) ⇒ Object

:nodoc:



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# File 'lib/arjdbc/jdbc/adapter.rb', line 224

def jdbc_update(sql, name = nil, binds = []) #:nodoc:
  execute(sql, name, binds)
end

#last_inserted_id(result) ⇒ Object 



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# File 'lib/arjdbc/jdbc/adapter.rb', line 243

def last_inserted_id(result)
  result
end

#modify_types(tp) ⇒ Object 



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# File 'lib/arjdbc/jdbc/adapter.rb', line 87

def modify_types(tp)
  tp
end

#native_database_types ⇒ Object

:nodoc:



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# File 'lib/arjdbc/jdbc/adapter.rb', line 138

def native_database_types #:nodoc:
  @connection.native_database_types
end

#native_sql_to_type(tp) ⇒ Object 



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# File 'lib/arjdbc/jdbc/adapter.rb', line 146

def native_sql_to_type(tp)
  if /^(.*?)\(([0-9]+)\)/ =~ tp
    tname = $1
    limit = $2.to_i
    ntype = native_database_types
    if ntype[:primary_key] == tp
      return :primary_key,nil
    else
      ntype.each do |name,val|
        if name == :primary_key
          next
        end
        if val[:name].downcase == tname.downcase && (val[:limit].nil? || val[:limit].to_i == limit)
          return name,limit
        end
      end
    end
  elsif /^(.*?)/ =~ tp
    tname = $1
    ntype = native_database_types
    if ntype[:primary_key] == tp
      return :primary_key,nil
    else
      ntype.each do |name,val|
        if val[:name].downcase == tname.downcase && val[:limit].nil?
          return name,nil
        end
      end
    end
  else
    return :string,255
  end
  return nil,nil
end

#pk_and_sequence_for(table) ⇒ Object 



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# File 'lib/arjdbc/jdbc/adapter.rb', line 321

def pk_and_sequence_for(table)
  key = primary_key(table)
  [key, nil] if key
end

#primary_key(table) ⇒ Object 



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# File 'lib/arjdbc/jdbc/adapter.rb', line 326

def primary_key(table)
  primary_keys(table).first
end

#primary_keys(table) ⇒ Object 



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# File 'lib/arjdbc/jdbc/adapter.rb', line 330

def primary_keys(table)
  @connection.primary_keys(table)
end

#reconnect! ⇒ Object 



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# File 'lib/arjdbc/jdbc/adapter.rb', line 185

def reconnect!
  @connection.reconnect!
  @connection
end

#rollback_db_transaction ⇒ Object 



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# File 'lib/arjdbc/jdbc/adapter.rb', line 313

def rollback_db_transaction
  @connection.rollback
end

#select(*args) ⇒ Object 



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# File 'lib/arjdbc/jdbc/adapter.rb', line 334

def select(*args)
  execute(*args)
end

#select_one(sql, name = nil) ⇒ Object

Do we need this? Not in AR 3.



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# File 'lib/arjdbc/jdbc/adapter.rb', line 238

def select_one(sql, name = nil)
  select(sql, name).first
end

#select_rows(sql, name = nil) ⇒ Object 



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# File 'lib/arjdbc/jdbc/adapter.rb', line 247

def select_rows(sql, name = nil)
  rows = []
  select(sql, name).each {|row| rows << row.values }
  rows
end

#substitute_binds(manager, binds = []) ⇒ Object 



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# File 'lib/arjdbc/jdbc/adapter.rb', line 194

def substitute_binds(manager, binds = [])
  sql = extract_sql(manager)
  if binds.empty?
    sql
  else
    copy = binds.dup
    sql.gsub('?') { quote(*copy.shift.reverse) }
  end
end

#supports_migrations? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/arjdbc/jdbc/adapter.rb', line 134

def supports_migrations?
  true
end

#table_exists?(name) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/arjdbc/jdbc/adapter.rb', line 297

def table_exists?(name)
  jdbc_columns(name) rescue nil
end

#tables(name = nil) ⇒ Object 



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# File 'lib/arjdbc/jdbc/adapter.rb', line 293

def tables(name = nil)
  @connection.tables
end

#write_large_object(*args) ⇒ Object 



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# File 'lib/arjdbc/jdbc/adapter.rb', line 317

def write_large_object(*args)
  @connection.write_large_object(*args)
end