Class: KnjDB_mysql
Defined Under Namespace
Classes: Columns, Indexes, Sqlspecs, Tables
Instance Attribute Summary collapse
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#cols ⇒ Object
Returns the value of attribute cols.
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#conn ⇒ Object
readonly
Returns the value of attribute conn.
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#conns ⇒ Object
readonly
Returns the value of attribute conns.
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#indexes ⇒ Object
Returns the value of attribute indexes.
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#knjdb ⇒ Object
readonly
Returns the value of attribute knjdb.
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#sep_col ⇒ Object
readonly
Returns the value of attribute sep_col.
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#sep_table ⇒ Object
readonly
Returns the value of attribute sep_table.
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#sep_val ⇒ Object
readonly
Returns the value of attribute sep_val.
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#tables ⇒ Object
Returns the value of attribute tables.
Instance Method Summary collapse
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#clean ⇒ Object
Cleans the wref-map holding the tables.
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#close ⇒ Object
Closes the connection threadsafe.
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#destroy ⇒ Object
Destroyes the connection.
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#esc_col(string) ⇒ Object
(also: #esc_table)
Escapes a string to be safe to use as a column in a query.
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#escape(string) ⇒ Object
(also: #esc)
An alternative to the MySQL framework’s escape.
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#escape_alternative(string) ⇒ Object
Escapes a string to be safe to use in a query.
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#initialize(knjdb_ob) ⇒ KnjDB_mysql
constructor
A new instance of KnjDB_mysql.
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#insert_multi(tablename, arr_hashes, args = nil) ⇒ Object
Inserts multiple rows in a table.
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#java_mysql_resultset_killer(id) ⇒ Object
This method handels the closing of statements and results for the Java MySQL-mode.
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#lastID ⇒ Object
Returns the last inserted ID for the connection.
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#query(str) ⇒ Object
Executes a query and returns the result.
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#query_ubuf(str) ⇒ Object
Executes an unbuffered query and returns the result that can be used to access the data.
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#reconnect ⇒ Object
Respawns the connection to the MySQL-database.
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#transaction ⇒ Object
Starts a transaction, yields the database and commits at the end.
Constructor Details
#initialize(knjdb_ob) ⇒ KnjDB_mysql
Returns a new instance of KnjDB_mysql.
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# File 'lib/knj/knjdb/drivers/mysql/knjdb_mysql.rb', line 5 def initialize(knjdb_ob) @knjdb = knjdb_ob @opts = @knjdb.opts @sep_table = "`" @sep_col = "`" @sep_val = "'" require "monitor" @mutex = Monitor.new if @opts[:encoding] @encoding = @opts[:encoding] else @encoding = "utf8" end if @knjdb.opts.key?(:port) @port = @knjdb.opts[:port].to_i else @port = 3306 end @java_rs_data = {} @subtype = @knjdb.opts[:subtype] @subtype = "mysql" if @subtype.to_s.length <= 0 self.reconnect end |
Instance Attribute Details
#cols ⇒ Object
Returns the value of attribute cols.
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# File 'lib/knj/knjdb/drivers/mysql/knjdb_mysql.rb', line 3 def cols @cols end |
#conn ⇒ Object (readonly)
Returns the value of attribute conn.
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# File 'lib/knj/knjdb/drivers/mysql/knjdb_mysql.rb', line 2 def conn @conn end |
#conns ⇒ Object (readonly)
Returns the value of attribute conns.
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# File 'lib/knj/knjdb/drivers/mysql/knjdb_mysql.rb', line 2 def conns @conns end |
#indexes ⇒ Object
Returns the value of attribute indexes.
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# File 'lib/knj/knjdb/drivers/mysql/knjdb_mysql.rb', line 3 def indexes @indexes end |
#knjdb ⇒ Object (readonly)
Returns the value of attribute knjdb.
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# File 'lib/knj/knjdb/drivers/mysql/knjdb_mysql.rb', line 2 def knjdb @knjdb end |
#sep_col ⇒ Object (readonly)
Returns the value of attribute sep_col.
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# File 'lib/knj/knjdb/drivers/mysql/knjdb_mysql.rb', line 2 def sep_col @sep_col end |
#sep_table ⇒ Object (readonly)
Returns the value of attribute sep_table.
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# File 'lib/knj/knjdb/drivers/mysql/knjdb_mysql.rb', line 2 def sep_table @sep_table end |
#sep_val ⇒ Object (readonly)
Returns the value of attribute sep_val.
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# File 'lib/knj/knjdb/drivers/mysql/knjdb_mysql.rb', line 2 def sep_val @sep_val end |
#tables ⇒ Object
Returns the value of attribute tables.
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# File 'lib/knj/knjdb/drivers/mysql/knjdb_mysql.rb', line 3 def tables @tables end |
Instance Method Details
#clean ⇒ Object
Cleans the wref-map holding the tables.
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# File 'lib/knj/knjdb/drivers/mysql/knjdb_mysql.rb', line 44 def clean self.tables.clean if self.tables end |
#close ⇒ Object
Closes the connection threadsafe.
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# File 'lib/knj/knjdb/drivers/mysql/knjdb_mysql.rb', line 280 def close @mutex.synchronize do @conn.close end end |
#destroy ⇒ Object
Destroyes the connection.
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# File 'lib/knj/knjdb/drivers/mysql/knjdb_mysql.rb', line 287 def destroy @conn = nil @knjdb = nil @mutex = nil @subtype = nil @encoding = nil @query_args = nil @port = nil end |
#esc_col(string) ⇒ Object Also known as: esc_table
Escapes a string to be safe to use as a column in a query.
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# File 'lib/knj/knjdb/drivers/mysql/knjdb_mysql.rb', line 252 def esc_col(string) string = string.to_s raise "Invalid column-string: #{string}" if string.index(@sep_col) != nil return string end |
#escape(string) ⇒ Object Also known as: esc
An alternative to the MySQL framework’s escape. This is copied from the Ruby/MySQL framework at: www.tmtm.org/en/ruby/mysql/
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# File 'lib/knj/knjdb/drivers/mysql/knjdb_mysql.rb', line 239 def escape(string) return string.to_s.gsub(/([\0\n\r\032\'\"\\])/) do case $1 when "\0" then "\\0" when "\n" then "\\n" when "\r" then "\\r" when "\032" then "\\Z" else "\\#{$1}" end end end |
#escape_alternative(string) ⇒ Object
Escapes a string to be safe to use in a query.
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# File 'lib/knj/knjdb/drivers/mysql/knjdb_mysql.rb', line 225 def escape_alternative(string) case @subtype when "mysql" return @conn.escape_string(string.to_s) when "mysql2" return @conn.escape(string.to_s) when "java" return self.escape(string) else raise "Unknown subtype: '#{@subtype}'." end end |
#insert_multi(tablename, arr_hashes, args = nil) ⇒ Object
Inserts multiple rows in a table. Can return the inserted IDs if asked to in arguments.
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# File 'lib/knj/knjdb/drivers/mysql/knjdb_mysql.rb', line 298 def insert_multi(tablename, arr_hashes, args = nil) sql = "INSERT INTO `#{tablename}` (" first = true if args and args[:keys] keys = args[:keys] elsif arr_hashes.first.is_a?(Hash) keys = arr_hashes.first.keys else raise "Could not figure out keys." end keys.each do |col_name| sql << "," if !first first = false if first sql << "`#{self.esc_col(col_name)}`" end sql << ") VALUES (" first = true arr_hashes.each do |hash| if first first = false else sql << "),(" end first_key = true if hash.is_a?(Array) hash.each do |val| if first_key first_key = false else sql << "," end sql << @knjdb.sqlval(val) end else hash.each do |key, val| if first_key first_key = false else sql << "," end sql << @knjdb.sqlval(val) end end end sql << ")" return sql if args and args[:return_sql] self.query(sql) if args and args[:return_id] first_id = self.lastID raise "Invalid ID: #{first_id}" if first_id.to_i <= 0 ids = [first_id] 1.upto(arr_hashes.length - 1) do |count| ids << first_id + count end ids_length = ids.length arr_hashes_length = arr_hashes.length raise "Invalid length (#{ids_length}, #{arr_hashes_length})." if ids_length != arr_hashes_length return ids else return nil end end |
#java_mysql_resultset_killer(id) ⇒ Object
This method handels the closing of statements and results for the Java MySQL-mode.
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# File 'lib/knj/knjdb/drivers/mysql/knjdb_mysql.rb', line 34 def java_mysql_resultset_killer(id) data = @java_rs_data[id] return nil if !data data[:res].close data[:stmt].close @java_rs_data.delete(id) end |
#lastID ⇒ Object
Returns the last inserted ID for the connection.
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# File 'lib/knj/knjdb/drivers/mysql/knjdb_mysql.rb', line 262 def lastID case @subtype when "mysql" @mutex.synchronize do return @conn.insert_id.to_i end when "mysql2" @mutex.synchronize do return @conn.last_id.to_i end when "java" data = self.query("SELECT LAST_INSERT_ID() AS id").fetch return data[:id].to_i if data.key?(:id) raise "Could not figure out last inserted ID." end end |
#query(str) ⇒ Object
Executes a query and returns the result.
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# File 'lib/knj/knjdb/drivers/mysql/knjdb_mysql.rb', line 112 def query(str) str = str.to_s str = str.force_encoding("UTF-8") if @encoding == "utf8" and str.respond_to?(:force_encoding) tries = 0 begin tries += 1 @mutex.synchronize do case @subtype when "mysql" return KnjDB_mysql_result.new(self, @conn.query(str)) when "mysql2" return KnjDB_mysql2_result.new(@conn.query(str, @query_args)) when "java" stmt = conn.create_statement if str.match(/^\s*(delete|update|create|drop|insert\s+into|alter)\s+/i) begin stmt.execute(str) ensure stmt.close end return nil else id = nil begin res = stmt.execute_query(str) ret = KnjDB_java_mysql_result.new(@knjdb, @opts, res) id = ret.__id__ #If ID is being reused we have to free the result. self.java_mysql_resultset_killer(id) if @java_rs_data.key?(id) #Save reference to result and statement, so we can close them when they are garbage collected. @java_rs_data[id] = {:res => res, :stmt => stmt} ObjectSpace.define_finalizer(ret, self.method(:java_mysql_resultset_killer)) return ret rescue => e res.close if res stmt.close @java_rs_data.delete(id) if ret and id raise e end end else raise "Unknown subtype: '#{@subtype}'." end end rescue => e if tries <= 3 if e. == "MySQL server has gone away" or e. == "closed MySQL connection" or e. == "Can't connect to local MySQL server through socket" sleep 0.5 self.reconnect retry elsif e..include?("No operations allowed after connection closed") or e. == "This connection is still waiting for a result, try again once you have the result" or e. == "Lock wait timeout exceeded; try restarting transaction" self.reconnect retry end end raise e end end |
#query_ubuf(str) ⇒ Object
Executes an unbuffered query and returns the result that can be used to access the data.
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# File 'lib/knj/knjdb/drivers/mysql/knjdb_mysql.rb', line 180 def query_ubuf(str) @mutex.synchronize do case @subtype when "mysql" @conn.query_with_result = false return KnjDB_mysql_unbuffered_result.new(@conn, @opts, @conn.query(str)) when "mysql2" return KnjDB_mysql2_result.new(@conn.query(str, @query_args.merge(:stream => true))) when "java" if str.match(/^\s*(delete|update|create|drop|insert\s+into)\s+/i) stmt = @conn.createStatement begin stmt.execute(str) ensure stmt.close end return nil else stmt = @conn.createStatement(java.sql.ResultSet.TYPE_FORWARD_ONLY, java.sql.ResultSet.CONCUR_READ_ONLY) stmt.setFetchSize(java.lang.Integer::MIN_VALUE) begin res = stmt.executeQuery(str) ret = KnjDB_java_mysql_result.new(@knjdb, @opts, res) #Save reference to result and statement, so we can close them when they are garbage collected. @java_rs_data[ret.__id__] = {:res => res, :stmt => stmt} ObjectSpace.define_finalizer(ret, self.method("java_mysql_resultset_killer")) return ret rescue => e res.close if res stmt.close raise e end end else raise "Unknown subtype: '#{@subtype}'" end end end |
#reconnect ⇒ Object
Respawns the connection to the MySQL-database.
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# File 'lib/knj/knjdb/drivers/mysql/knjdb_mysql.rb', line 49 def reconnect @mutex.synchronize do case @subtype when "mysql" @conn = Mysql.real_connect(@knjdb.opts[:host], @knjdb.opts[:user], @knjdb.opts[:pass], @knjdb.opts[:db], @port) when "mysql2" require "rubygems" require "mysql2" args = { :host => @knjdb.opts[:host], :username => @knjdb.opts[:user], :password => @knjdb.opts[:pass], :database => @knjdb.opts[:db], :port => @port, :symbolize_keys => true, :cache_rows => false } #Symbolize keys should also be given here, else table-data wont be symbolized for some reason - knj. @query_args = {:symbolize_keys => true} @query_args.merge!(@knjdb.opts[:query_args]) if @knjdb.opts[:query_args] pos_args = [:as, :async, :cast_booleans, :database_timezone, :application_timezone, :cache_rows, :connect_flags, :cast] pos_args.each do |key| args[key] = @knjdb.opts[key] if @knjdb.opts.key?(key) end args[:as] = :array if @opts[:result] == "array" tries = 0 begin tries += 1 @conn = Mysql2::Client.new(args) rescue => e if tries <= 3 if e. == "Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (111)" sleep 1 retry end end raise e end when "java" if !@jdbc_loaded require "java" require "/usr/share/java/mysql-connector-java.jar" if File.exists?("/usr/share/java/mysql-connector-java.jar") import "com.mysql.jdbc.Driver" @jdbc_loaded = true end @conn = java.sql::DriverManager.getConnection("jdbc:mysql://#{@knjdb.opts[:host]}:#{@port}/#{@knjdb.opts[:db]}?user=#{@knjdb.opts[:user]}&password=#{@knjdb.opts[:pass]}&populateInsertRowWithDefaultValues=true&zeroDateTimeBehavior=round&characterEncoding=#{@encoding}&holdResultsOpenOverStatementClose=true") self.query("SET SQL_MODE = ''") else raise "Unknown subtype: #{@subtype}" end self.query("SET NAMES '#{self.esc(@encoding)}'") if @encoding end end |
#transaction ⇒ Object
Starts a transaction, yields the database and commits at the end.
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# File 'lib/knj/knjdb/drivers/mysql/knjdb_mysql.rb', line 375 def transaction @knjdb.q("START TRANSACTION") begin yield(@knjdb) ensure @knjdb.q("COMMIT") end end |