module Sequel::JDBC::Transactions
Constants
- JDBC_TRANSACTION_ISOLATION_LEVELS
Public Instance Methods
freeze()
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Calls superclass method
# File lib/sequel/adapters/jdbc/transactions.rb, line 6 def freeze supports_savepoints? super end
supports_savepoints?()
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Check the JDBC DatabaseMetaData for savepoint support
# File lib/sequel/adapters/jdbc/transactions.rb, line 12 def supports_savepoints? return @supports_savepoints if defined?(@supports_savepoints) @supports_savepoints = synchronize{|c| c.getMetaData.supports_savepoints} end
supports_transaction_isolation_levels?()
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Check the JDBC DatabaseMetaData for support for serializable isolation, since that's the value most people will use.
# File lib/sequel/adapters/jdbc/transactions.rb, line 19 def supports_transaction_isolation_levels? synchronize{|conn| conn.getMetaData.supportsTransactionIsolationLevel(JavaSQL::Connection::TRANSACTION_SERIALIZABLE)} end
Private Instance Methods
begin_transaction(conn, opts=OPTS)
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Use JDBC connection's setAutoCommit to false to start transactions
# File lib/sequel/adapters/jdbc/transactions.rb, line 52 def begin_transaction(conn, opts=OPTS) if in_savepoint?(conn) _trans(conn)[:savepoints][-1][:obj] = log_connection_yield('Transaction.savepoint', conn){conn.set_savepoint} else log_connection_yield('Transaction.begin', conn){conn.setAutoCommit(false)} set_transaction_isolation(conn, opts) end end
commit_transaction(conn, opts=OPTS)
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Use JDBC connection's commit method to commit transactions
# File lib/sequel/adapters/jdbc/transactions.rb, line 62 def commit_transaction(conn, opts=OPTS) if in_savepoint?(conn) if supports_releasing_savepoints? log_connection_yield('Transaction.release_savepoint', conn){conn.release_savepoint(savepoint_obj(conn))} end else log_connection_yield('Transaction.commit', conn){conn.commit} end end
remove_transaction(conn, committed)
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Use JDBC connection's setAutoCommit to true to enable non-transactional behavior
Calls superclass method
# File lib/sequel/adapters/jdbc/transactions.rb, line 73 def remove_transaction(conn, committed) if jdbc_level = _trans(conn)[:original_jdbc_isolation_level] log_connection_yield("Transaction.restore_isolation_level", conn){conn.setTransactionIsolation(jdbc_level)} end unless in_savepoint?(conn) conn.setAutoCommit(true) end ensure super end
rollback_transaction(conn, opts=OPTS)
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Use JDBC connection's rollback method to rollback transactions
# File lib/sequel/adapters/jdbc/transactions.rb, line 85 def rollback_transaction(conn, opts=OPTS) if in_savepoint?(conn) log_connection_yield('Transaction.rollback_savepoint', conn){conn.rollback(savepoint_obj(conn))} else log_connection_yield('Transaction.rollback', conn){conn.rollback} end end
savepoint_obj(conn)
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JDBC savepoint object for the current savepoint for the connection.
# File lib/sequel/adapters/jdbc/transactions.rb, line 47 def savepoint_obj(conn) _trans(conn)[:savepoints][-1][:obj] end
set_transaction_isolation(conn, opts)
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Set the transaction isolation level on the given connection using the JDBC API.
# File lib/sequel/adapters/jdbc/transactions.rb, line 32 def set_transaction_isolation(conn, opts) level = opts.fetch(:isolation, transaction_isolation_level) if (jdbc_level = JDBC_TRANSACTION_ISOLATION_LEVELS[level]) && conn.getMetaData.supportsTransactionIsolationLevel(jdbc_level) _trans(conn)[:original_jdbc_isolation_level] = conn.getTransactionIsolation log_connection_yield("Transaction.isolation_level = #{level}", conn){conn.setTransactionIsolation(jdbc_level)} end end
supports_releasing_savepoints?()
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Most JDBC drivers that support savepoints support releasing them.
# File lib/sequel/adapters/jdbc/transactions.rb, line 42 def supports_releasing_savepoints? true end