Package jade.domain

Class DFHSQLKB

java.lang.Object

jade.domain.KBManagement.KB

jade.domain.KBManagement.DBKB

jade.domain.DFDBKB

jade.domain.DFHSQLKB

public class DFHSQLKB
extends DFDBKB

DFHSQLKB realizes a knowledge base used by the DF which stores its content in an HSQL database, running in the same VM. The SQL commands are optimized for the HSQL database.

Author:

Roland Mungenast - Profactor

Nested Class Summary

Nested classes/interfaces inherited from class jade.domain.KBManagement.DBKB

DBKB.ConnectionWrapper, DBKB.EmptyKBIterator

Field Summary

Fields

Modifier and Type	Field	Description
protected static String	CACHE_SCALE
protected static String	CACHE_SIZE_SCALE
protected static String	GC_INTERVAL

Fields inherited from class jade.domain.DFDBKB

DEFAULT_LONGVARCHAR_TYPE

Fields inherited from class jade.domain.KBManagement.DBKB

cleanTables, driver

Fields inherited from class jade.domain.KBManagement.KB

lm, logger, sr

Constructor Summary

Constructors

Constructor	Description
DFHSQLKB(int maxResultLimit, boolean cleanTables)	Constructor

Method Summary

Modifier and Type	Method	Description
protected Connection	createDBConnection(String url, String user, String passwd)
protected void	createTable(Statement stmt, String name, String[] entries)
protected String	getLongVarCharType()	Returns the name of the SQL type used in the database to represent very long strings.

Methods inherited from class jade.domain.DFDBKB

createDFTables, createIndices, createTable, dropDFTables, dropTable, getGUID, getHashValue, getSubscriptions, initConnectionWrapper, insertSingle, iteratorSingle, prepDBStr, removeSingle, replace, searchSingle, setup, subscribeSingle, tableExists, unsubscribeSingle

Methods inherited from class jade.domain.KBManagement.DBKB

getConnectionWrapper, insert, iterator, remove, search, subscribe, unsubscribe

Methods inherited from class jade.domain.KBManagement.KB

deregister, register, search, setLeaseManager, setSubscriptionResponder

Methods inherited from class java.lang.Object

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

Field Detail

CACHE_SCALE

protected static final String CACHE_SCALE

See Also:

Constant Field Values

CACHE_SIZE_SCALE

protected static final String CACHE_SIZE_SCALE

See Also:

Constant Field Values

GC_INTERVAL

protected static final String GC_INTERVAL

See Also:

Constant Field Values

Constructor Detail

DFHSQLKB

public DFHSQLKB(int maxResultLimit,
                boolean cleanTables)
         throws SQLException

Constructor

Parameters:

maxResultLimit - JADE internal limit for the number of maximum search results.

cleanTables - specifies whether the KB should delete all existing tables for the DF at startup

Throws:

SQLException - if a database access error occurs

Method Detail

createDBConnection

protected Connection createDBConnection(String url,
                                        String user,
                                        String passwd)
                                 throws SQLException

Overrides:

createDBConnection in class DBKB

Throws:

SQLException

getLongVarCharType

protected String getLongVarCharType()

Description copied from class: DFDBKB

Returns the name of the SQL type used in the database to represent very long strings.

Overrides:

getLongVarCharType in class DFDBKB

createTable

protected void createTable(Statement stmt,
                           String name,
                           String[] entries)
                    throws SQLException

Throws:

SQLException