kodo.jdbc.meta.strats
Class LockGroupStateComparisonVersionStrategy

java.lang.Object
  org.apache.openjpa.jdbc.meta.strats.AbstractStrategy
      org.apache.openjpa.jdbc.meta.strats.AbstractVersionStrategy
          kodo.jdbc.meta.strats.LockGroupStateComparisonVersionStrategy

All Implemented Interfaces:

org.apache.openjpa.jdbc.meta.Strategy, org.apache.openjpa.jdbc.meta.VersionStrategy

public class LockGroupStateComparisonVersionStrategy
extends org.apache.openjpa.jdbc.meta.strats.AbstractVersionStrategy

Uses a state image to determine whether concurrency violations take place.

Nested Class Summary

static class

LockGroupStateComparisonVersionStrategy.CustomUpdate Row implementation we use to pass to versionable mappings so they can set up the where conditions we need to add to update statements.

Field Summary

static String

ALIAS

Fields inherited from class org.apache.openjpa.jdbc.meta.strats.AbstractVersionStrategy

vers

Constructor Summary

LockGroupStateComparisonVersionStrategy()

Method Summary

void	afterLoad(org.apache.openjpa.kernel.OpenJPAStateManager sm, org.apache.openjpa.jdbc.kernel.JDBCStore store)
boolean	checkVersion(org.apache.openjpa.kernel.OpenJPAStateManager sm, org.apache.openjpa.jdbc.kernel.JDBCStore store, boolean updateVersion)
int	compareVersion(Object v1, Object v2)
void	customInsert(org.apache.openjpa.kernel.OpenJPAStateManager sm, org.apache.openjpa.jdbc.kernel.JDBCStore store) This method is for class mappings that take over the insert process, but still want to use this indicator for optimistic locking.
LockGroupStateComparisonVersionStrategy.CustomUpdate	customUpdate(org.apache.openjpa.kernel.OpenJPAStateManager sm, org.apache.openjpa.jdbc.kernel.JDBCStore store, org.apache.openjpa.jdbc.schema.Table table, boolean record) This method is for class mappings that take over the update process, but still want to use this indicator for optimistic locking.
String	getAlias()
void	insert(org.apache.openjpa.kernel.OpenJPAStateManager sm, org.apache.openjpa.jdbc.kernel.JDBCStore store, org.apache.openjpa.jdbc.sql.RowManager rm)
void	map(boolean adapt)
void	update(org.apache.openjpa.kernel.OpenJPAStateManager sm, org.apache.openjpa.jdbc.kernel.JDBCStore store, org.apache.openjpa.jdbc.sql.RowManager rm)

Methods inherited from class org.apache.openjpa.jdbc.meta.strats.AbstractVersionStrategy

load, select, setVersion

Methods inherited from class org.apache.openjpa.jdbc.meta.strats.AbstractStrategy

customDelete, customUpdate, delete, initialize, isCustomDelete, isCustomInsert, isCustomUpdate

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.openjpa.jdbc.meta.Strategy

customDelete, customUpdate, delete, initialize, isCustomDelete, isCustomInsert, isCustomUpdate

Field Detail

ALIAS

public static final String ALIAS

See Also:

Constant Field Values

Constructor Detail

LockGroupStateComparisonVersionStrategy

public LockGroupStateComparisonVersionStrategy()

Method Detail

getAlias

public String getAlias()

Specified by:

getAlias in interface org.apache.openjpa.jdbc.meta.Strategy

Overrides:

getAlias in class org.apache.openjpa.jdbc.meta.strats.AbstractStrategy

map

public void map(boolean adapt)

Specified by:

map in interface org.apache.openjpa.jdbc.meta.Strategy

Overrides:

map in class org.apache.openjpa.jdbc.meta.strats.AbstractStrategy

insert

public void insert(org.apache.openjpa.kernel.OpenJPAStateManager sm,
                   org.apache.openjpa.jdbc.kernel.JDBCStore store,
                   org.apache.openjpa.jdbc.sql.RowManager rm)
            throws SQLException

Specified by:

insert in interface org.apache.openjpa.jdbc.meta.Strategy

Overrides:

insert in class org.apache.openjpa.jdbc.meta.strats.AbstractStrategy

Throws:

SQLException

customInsert

public void customInsert(org.apache.openjpa.kernel.OpenJPAStateManager sm,
                         org.apache.openjpa.jdbc.kernel.JDBCStore store)
                  throws SQLException

This method is for class mappings that take over the insert process, but still want to use this indicator for optimistic locking.

Specified by:

customInsert in interface org.apache.openjpa.jdbc.meta.Strategy

Overrides:

customInsert in class org.apache.openjpa.jdbc.meta.strats.AbstractStrategy

Throws:

SQLException

update

public void update(org.apache.openjpa.kernel.OpenJPAStateManager sm,
                   org.apache.openjpa.jdbc.kernel.JDBCStore store,
                   org.apache.openjpa.jdbc.sql.RowManager rm)
            throws SQLException

Specified by:

update in interface org.apache.openjpa.jdbc.meta.Strategy

Overrides:

update in class org.apache.openjpa.jdbc.meta.strats.AbstractStrategy

Throws:

SQLException

customUpdate

public LockGroupStateComparisonVersionStrategy.CustomUpdate customUpdate(org.apache.openjpa.kernel.OpenJPAStateManager sm,
                                                                         org.apache.openjpa.jdbc.kernel.JDBCStore store,
                                                                         org.apache.openjpa.jdbc.schema.Table table,
                                                                         boolean record)
                                                                  throws SQLException

This method is for class mappings that take over the update process, but still want to use this indicator for optimistic locking.

Parameters:

sm - the instance to test

store - store manager context

table - only state image values in this table will be tested; if the custom mapping uses different updates for different tables, this method can be called multiple times for the multiple tables

record - set this parameter to true the last time you call this method, so the indicator can setup the next version of the given state manager

Returns:

a LockGroupStateComparisonVersionStrategy.CustomUpdate whose getSQL method yields a boolean SQL expression that tests whether the current record is equal to our recorded state image, and whose setParameters method parameterizes the given prepared statement with the values used in the above boolean expression

Throws:

SQLException

afterLoad

public void afterLoad(org.apache.openjpa.kernel.OpenJPAStateManager sm,
                      org.apache.openjpa.jdbc.kernel.JDBCStore store)

Specified by:

afterLoad in interface org.apache.openjpa.jdbc.meta.VersionStrategy

Overrides:

afterLoad in class org.apache.openjpa.jdbc.meta.strats.AbstractVersionStrategy

checkVersion

public boolean checkVersion(org.apache.openjpa.kernel.OpenJPAStateManager sm,
                            org.apache.openjpa.jdbc.kernel.JDBCStore store,
                            boolean updateVersion)
                     throws SQLException

Specified by:

checkVersion in interface org.apache.openjpa.jdbc.meta.VersionStrategy

Overrides:

checkVersion in class org.apache.openjpa.jdbc.meta.strats.AbstractVersionStrategy

Throws:

SQLException

compareVersion

public int compareVersion(Object v1,
                          Object v2)

Specified by:

compareVersion in interface org.apache.openjpa.jdbc.meta.VersionStrategy

Overrides:

compareVersion in class org.apache.openjpa.jdbc.meta.strats.AbstractVersionStrategy