de.must.dataobj

Class IdManager

java.lang.Object

de.must.dataobj.IdManager

public class IdManager
extends java.lang.Object

Central provider of primary keys. Requires a table named "IdentCnt" as usually defined in suitable subclasses of DataObject like DoIdent. Allocates new identifiers for each entity. Its recommended to use a unique ID manager for the entire application. In consequence, different threads inserting rows into database using different connections, will use the main connection anyway to create new IDs.

See Also:

mkt.DoIdent

Field Summary

Fields

Modifier and Type	Field and Description
static int	ERROR_ID

Constructor Summary

Constructors

Constructor and Description
IdManager(java.sql.Connection connection) Constructs a new ID manager for the specified database connection.

Method Summary

Modifier and Type	Method and Description
protected void	finalize()
void	free() Frees external resources.
static java.lang.String	getIdEntityColumnName()
static java.lang.String	getIdTableName()
static java.lang.String	getIdValueColumnName()
Identifier	getNewIdentifier(java.lang.String entityName) Returns a new identifier of the specified entity.
static void	setIdTableNames(java.lang.String idTableName, java.lang.String idEntityColumnName, java.lang.String idValueColumnName) Sets the table names for internal numbers if it differs from "IdentCnt", "Entity" and "IdentNr".

Methods inherited from class java.lang.Object

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

Field Detail

ERROR_ID

public static final int ERROR_ID

See Also:

Constant Field Values

Constructor Detail

IdManager

public IdManager(java.sql.Connection connection)

Constructs a new ID manager for the specified database connection.

Method Detail

setIdTableNames

public static void setIdTableNames(java.lang.String idTableName,
                                   java.lang.String idEntityColumnName,
                                   java.lang.String idValueColumnName)

Sets the table names for internal numbers if it differs from "IdentCnt", "Entity" and "IdentNr".

Parameters:

idTableName - the table name

idEntityColumnName - the column name

idValueColumnName - the column name containing the value

getIdTableName

public static java.lang.String getIdTableName()

getIdEntityColumnName

public static java.lang.String getIdEntityColumnName()

getIdValueColumnName

public static java.lang.String getIdValueColumnName()

getNewIdentifier

public Identifier getNewIdentifier(java.lang.String entityName)

Returns a new identifier of the specified entity.

Parameters:

entityName - the name of the entity to retrieve the identifier

Returns:

the allocated identifier

free

public void free()

Frees external resources. May be called manually without waiting for the garbage collector.

finalize

protected void finalize()
                 throws java.lang.Throwable

Overrides:

finalize in class java.lang.Object

Throws:

java.lang.Throwable