Package org.alfresco.repo.domain.schema.script

Class DeleteNotExistsV3Executor

java.lang.Object

org.alfresco.repo.domain.schema.script.DeleteNotExistsExecutor

org.alfresco.repo.domain.schema.script.DeleteNotExistsV3Executor

All Implemented Interfaces:

StatementExecutor

public class DeleteNotExistsV3Executor
extends DeleteNotExistsExecutor

Same logic as DeleteNotExistsExecutor with the following changes:

- filters the queries by unique values

- eager close of result sets

- we store all the ids in memory and process them from there - the secondary ids are stored in a unique list without duplicate values.

- we only cross 2 sets (the potential ids to delete from the primary table with the set of all secondary ids in that range) removing all elements from the second set from the first set

- every {pauseAndRecoverBatchSize} rows deleted we close all prepared statements and close the connection and sleep for {pauseAndRecoverTime} milliseconds. This is necessary to allow the DBMS to perform the background tasks without load from ACS. When we do not do this and if we are performing millions of deletes, the connection eventually gets aborted.

Author:

Eva Vasques

Field Summary

Fields

Modifier and Type	Field	Description
static final long	DEFAULT_PAUSE_AND_RECOVER_BATCHSIZE
static final long	DEFAULT_PAUSE_AND_RECOVER_TIME
static final String	PROPERTY_PAUSE_AND_RECOVER_BATCHSIZE
static final String	PROPERTY_PAUSE_AND_RECOVER_TIME

Fields inherited from class org.alfresco.repo.domain.schema.script.DeleteNotExistsExecutor

batchSize, connection, deleteBatchSize, deletedCount, globalProperties, PROPERTY_BATCH_SIZE, PROPERTY_DELETE_BATCH_SIZE, PROPERTY_READ_ONLY, PROPERTY_TIMEOUT_SECONDS, readOnly, startTime

Constructor Summary

Constructors

Constructor	Description
DeleteNotExistsV3Executor(Dialect dialect, Connection connection, String sql, int line, File scriptFile, Properties globalProperties, DataSource dataSource)

Method Summary

Modifier and Type	Method	Description
protected void	closeQuietly(Connection connection)
protected String	createPreparedSelectStatement(String tableName, String columnName, String whereClause)
void	execute()
protected void	process(Pair<String,String>[] tableColumn, Long[] tableUpperLimits, String[] optionalWhereClauses)
protected void	process(Pair<String,String>[] tableColumn, Long[] tableUpperLimits, String[] optionalWhereClauses, Long skipToId)
protected Long	processPrimaryTableResultSet(PreparedStatement primaryPrepStmt, PreparedStatement[] secondaryPrepStmts, PreparedStatement deletePrepStmt, Set<Long> deleteIds, String primaryTableName, String primaryColumnName, Pair<String,String>[] tableColumn)

Methods inherited from class org.alfresco.repo.domain.schema.script.DeleteNotExistsExecutor

checkProperties, closeQuietly, closeQuietly, closeQuietly, closeQuietly, createPreparedDeleteStatement, deleteFromPrimaryTable, getColumnValueById, getSecondaryIds, getSecondaryResultSets, isLess, isTimeoutExceeded

Methods inherited from class java.lang.Object

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

Field Details

PROPERTY_PAUSE_AND_RECOVER_BATCHSIZE

public static final String PROPERTY_PAUSE_AND_RECOVER_BATCHSIZE

See Also:

• Constant Field Values

PROPERTY_PAUSE_AND_RECOVER_TIME

public static final String PROPERTY_PAUSE_AND_RECOVER_TIME

See Also:

• Constant Field Values

DEFAULT_PAUSE_AND_RECOVER_BATCHSIZE

public static final long DEFAULT_PAUSE_AND_RECOVER_BATCHSIZE

See Also:

• Constant Field Values

DEFAULT_PAUSE_AND_RECOVER_TIME

public static final long DEFAULT_PAUSE_AND_RECOVER_TIME

See Also:

• Constant Field Values

Constructor Details

DeleteNotExistsV3Executor

public DeleteNotExistsV3Executor(Dialect dialect,
 Connection connection,
 String sql,
 int line,
 File scriptFile,
 Properties globalProperties,
 DataSource dataSource)

Method Details

execute

public void execute()
             throws Exception

Specified by:

execute in interface StatementExecutor

Overrides:

execute in class DeleteNotExistsExecutor

Throws:

Exception

process

protected void process(Pair<String,String>[] tableColumn,
 Long[] tableUpperLimits,
 String[] optionalWhereClauses)
                throws SQLException

Overrides:

process in class DeleteNotExistsExecutor

Throws:

SQLException

process

protected void process(Pair<String,String>[] tableColumn,
 Long[] tableUpperLimits,
 String[] optionalWhereClauses,
 Long skipToId)
                throws SQLException

Overrides:

process in class DeleteNotExistsExecutor

Throws:

SQLException

createPreparedSelectStatement

protected String createPreparedSelectStatement(String tableName,
 String columnName,
 String whereClause)

Overrides:

createPreparedSelectStatement in class DeleteNotExistsExecutor

processPrimaryTableResultSet

protected Long processPrimaryTableResultSet(PreparedStatement primaryPrepStmt,
 PreparedStatement[] secondaryPrepStmts,
 PreparedStatement deletePrepStmt,
 Set<Long> deleteIds,
 String primaryTableName,
 String primaryColumnName,
 Pair<String,String>[] tableColumn)
                                     throws SQLException

Overrides:

processPrimaryTableResultSet in class DeleteNotExistsExecutor

Throws:

SQLException

closeQuietly

protected void closeQuietly(Connection connection)