org.apache.seata.rm.datasource.undo

Class AbstractUndoExecutor

java.lang.Object

org.apache.seata.rm.datasource.undo.AbstractUndoExecutor

Direct Known Subclasses:

BaseSqlServerUndoExecutor, DmUndoDeleteExecutor, DmUndoInsertExecutor, DmUndoUpdateExecutor, MySQLUndoDeleteExecutor, MySQLUndoInsertExecutor, MySQLUndoUpdateExecutor, OracleUndoDeleteExecutor, OracleUndoInsertExecutor, OracleUndoUpdateExecutor, PostgresqlUndoDeleteExecutor, PostgresqlUndoInsertExecutor, PostgresqlUndoUpdateExecutor

public abstract class AbstractUndoExecutor
extends Object

The type Abstract undo executor.

Field Summary

Fields

Modifier and Type	Field and Description
static boolean	IS_UNDO_DATA_VALIDATION_ENABLE Switch of undo data validation
protected SQLUndoLog	sqlUndoLog The Sql undo log.

Constructor Summary

Constructors

Constructor and Description
AbstractUndoExecutor(SQLUndoLog sqlUndoLog) Instantiates a new Abstract undo executor.

Method Summary

Modifier and Type	Method and Description
protected String	buildCheckSql(String tableName, String whereCondition) build sql for query current records.
protected abstract String	buildUndoSQL() Build undo sql string.
protected boolean	dataValidationAndGoOn(ConnectionProxy conn) Data validation.
void	executeOn(ConnectionProxy connectionProxy) Execute on.
protected List<Field>	getOrderedPkList(TableRecords image, Row row, String dbType)
SQLUndoLog	getSqlUndoLog() Gets sql undo log.
protected abstract TableRecords	getUndoRows() Gets undo rows.
protected Map<String,List<Field>>	parsePkValues(List<Row> rows, List<String> pkNameList) Parse pk values Field List.
protected Map<String,List<Field>>	parsePkValues(TableRecords records) Parse pk values Field List.
protected TableRecords	queryCurrentRecords(ConnectionProxy connectionProxy) Query current records.
protected void	undoPrepare(PreparedStatement undoPST, ArrayList<Field> undoValues, List<Field> pkValueList) Undo prepare.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

IS_UNDO_DATA_VALIDATION_ENABLE

public static final boolean IS_UNDO_DATA_VALIDATION_ENABLE

Switch of undo data validation

sqlUndoLog

protected SQLUndoLog sqlUndoLog

The Sql undo log.

Constructor Detail

AbstractUndoExecutor

public AbstractUndoExecutor(SQLUndoLog sqlUndoLog)

Instantiates a new Abstract undo executor.

Parameters:

sqlUndoLog - the sql undo log

Method Detail

buildUndoSQL

protected abstract String buildUndoSQL()

Build undo sql string.

Returns:

the string

getSqlUndoLog

public SQLUndoLog getSqlUndoLog()

Gets sql undo log.

Returns:

the sql undo log

executeOn

public void executeOn(ConnectionProxy connectionProxy)
               throws SQLException

Execute on.

Parameters:

connectionProxy - the connection proxy

Throws:

SQLException - the sql exception

undoPrepare

protected void undoPrepare(PreparedStatement undoPST,
                           ArrayList<Field> undoValues,
                           List<Field> pkValueList)
                    throws SQLException

Undo prepare.

Parameters:

undoPST - the undo pst

undoValues - the undo values

pkValueList - the pk value

Throws:

SQLException - the sql exception

getUndoRows

protected abstract TableRecords getUndoRows()

Gets undo rows.

Returns:

the undo rows

dataValidationAndGoOn

protected boolean dataValidationAndGoOn(ConnectionProxy conn)
                                 throws SQLException

Data validation.

Parameters:

conn - the conn

Returns:

return true if data validation is ok and need continue undo, and return false if no need continue undo.

Throws:

SQLException - the sql exception such as has dirty data

queryCurrentRecords

protected TableRecords queryCurrentRecords(ConnectionProxy connectionProxy)
                                    throws SQLException

Query current records.

Parameters:

connectionProxy - the connection proxy

Returns:

the table records

Throws:

SQLException - the sql exception

buildCheckSql

protected String buildCheckSql(String tableName,
                               String whereCondition)

build sql for query current records.

Parameters:

tableName - the tableName to query

whereCondition - the where condition

Returns:

the check sql for query current records

getOrderedPkList

protected List<Field> getOrderedPkList(TableRecords image,
                                       Row row,
                                       String dbType)

parsePkValues

protected Map<String,List<Field>> parsePkValues(TableRecords records)

Parse pk values Field List.

Parameters:

records - the records

Returns:

each element represents a row. And inside a row list contains pk columns(Field).

parsePkValues

protected Map<String,List<Field>> parsePkValues(List<Row> rows,
                                                List<String> pkNameList)

Parse pk values Field List.

Parameters:

rows - pk rows

pkNameList - pk column name

Returns:

each element represents a row. And inside a row list contains pk columns(Field).