Class DerbyPkGenerator

java.lang.Object

org.apache.cayenne.dba.JdbcPkGenerator

org.apache.cayenne.dba.oracle.OraclePkGenerator

org.apache.cayenne.dba.derby.DerbyPkGenerator

All Implemented Interfaces:

PkGenerator

public class DerbyPkGenerator
extends OraclePkGenerator

PK generator for Derby that uses sequences.

Since:

4.0 (old one used AUTO_PK_SUPPORT table)

Field Summary

Fields inherited from class JdbcPkGenerator

adapter, DEFAULT_PK_CACHE_SIZE, pkCache, pkCacheSize, pkStartValue

Modifier and Type	Field	Description
protected JdbcAdapter	adapter
static final int	DEFAULT_PK_CACHE_SIZE
protected ConcurrentMap<String, Queue<Long>>	pkCache
protected int	pkCacheSize
protected long	pkStartValue

Constructor Summary

Constructors

Constructor	Description
DerbyPkGenerator()	Used by DI

Method Summary

Modifier and Type	Method	Description
protected String	createSequenceString(DbEntity entity)
protected String	dropSequenceString(DbEntity entity)	Returns a SQL string needed to drop any database objects associated with automatic primary key generation process for a specific DbEntity.
protected String	selectAllSequencesQuery()
protected String	selectNextValQuery(String pkGeneratingSequenceName)
protected String	sequenceName(DbEntity entity)	Returns expected primary key sequence name for a DbEntity.

Methods inherited from class OraclePkGenerator

createAutoPk, createAutoPkStatements, dropAutoPk, dropAutoPkStatements, getExistingSequences, getSequencePrefix, longPkFromDatabase, pkCacheSize

Modifier and Type	Method	Description
void	createAutoPk(DataNode node, List<DbEntity> dbEntities)	Generates necessary database objects to provide automatic primary key support.
List<String>	createAutoPkStatements(List<DbEntity> dbEntities)	Creates a list of CREATE SEQUENCE statements for the list of DbEntities.
void	dropAutoPk(DataNode node, List<DbEntity> dbEntities)	Drops PK sequences for all specified DbEntities.
List<String>	dropAutoPkStatements(List<DbEntity> dbEntities)	Creates a list of DROP SEQUENCE statements for the list of DbEntities.
protected List<String>	getExistingSequences(DataNode node)	Fetches a list of existing sequences that might match Cayenne generated ones.
protected String	getSequencePrefix()
protected long	longPkFromDatabase(DataNode node, DbEntity entity)	Generates primary key by calling Oracle sequence corresponding to the dbEntity.
protected int	pkCacheSize(DbEntity entity)

Methods inherited from class JdbcPkGenerator

autoPkTableExists, dropAutoPkString, generatePk, getAdapter, getPkCacheSize, pkCreateString, pkDeleteString, pkSelectString, pkTableCreateString, pkUpdateString, reset, runUpdate, setAdapter, setPkCacheSize

Modifier and Type	Method	Description
protected boolean	autoPkTableExists(DataNode node)	Checks if AUTO_PK_TABLE already exists in the database.
protected String	dropAutoPkString()
Object	generatePk(DataNode node, DbAttribute pk)	Generates a unique and non-repeating primary key for specified dbEntity.
JdbcAdapter	getAdapter()	Get an adapter associated with current PkGenerator
int	getPkCacheSize()	Returns a size of the entity primary key cache.
protected String	pkCreateString(String entName)
protected String	pkDeleteString(List<DbEntity> dbEntities)
protected String	pkSelectString(String entName)
protected String	pkTableCreateString()
protected String	pkUpdateString(String entName)
void	reset()	Resets any cached primary keys forcing generator to go to the database next time id generation is requested.
int	runUpdate(DataNode node, String sql)	Runs JDBC update over a Connection obtained from DataNode.
void	setAdapter(DbAdapter adapter)	Install the adapter associated with current PkGenerator
void	setPkCacheSize(int pkCacheSize)	Sets the size of the entity primary key cache.

Methods inherited from class Object

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

Constructor Details

DerbyPkGenerator

public DerbyPkGenerator()

Used by DI

Since:

4.1

Method Details

sequenceName

protected String sequenceName(DbEntity entity)

Description copied from class: OraclePkGenerator

Returns expected primary key sequence name for a DbEntity.

Overrides:

sequenceName in class OraclePkGenerator

selectNextValQuery

protected String selectNextValQuery(String pkGeneratingSequenceName)

Overrides:

selectNextValQuery in class OraclePkGenerator

selectAllSequencesQuery

protected String selectAllSequencesQuery()

Overrides:

selectAllSequencesQuery in class OraclePkGenerator

dropSequenceString

protected String dropSequenceString(DbEntity entity)

Description copied from class: OraclePkGenerator

Returns a SQL string needed to drop any database objects associated with automatic primary key generation process for a specific DbEntity.

Overrides:

dropSequenceString in class OraclePkGenerator

createSequenceString

protected String createSequenceString(DbEntity entity)

Overrides:

createSequenceString in class OraclePkGenerator