yass.database
Class HsqldbDatabase

java.lang.Object
  yass.database.Database
      yass.database.HsqldbDatabase

public class HsqldbDatabase
extends Database

An implementation of a simulation database using the HSQLDB in-memory DBMS for lower-level data storage

Field Summary

private static org.apache.log4j.Logger

log The logger

Fields inherited from class yass.database.Database

analysisMode, connection, dbContainerDirectory, dbName, dbPassword, dbProperties, dbServer, dbTablesFilepath, dbUsername, deleteOnShutdown, driver, dropTablesOnShutdown, eventClasses, generator, protocol, running, statementCommitThreshold, statementCounter, type

Constructor Summary

HsqldbDatabase()
Creates a new instance of HsqldbDatabase using default values for reasonable but untuned performance

HsqldbDatabase(java.lang.String databaseName, java.util.Set<java.lang.Class> eventClasses, int statementCommitThreshold)
Creates a new instance of HsqldbDatabase

Method Summary

protected void	createConnection() Creates a connection to the underlying database
protected java.util.Properties	createDbProperties() Creates a properties object containing the database parameters supplied by the user and application to HSQLDB during database creation
protected void	setDatabaseProperties() Sets dynamic properties on the underlying HSQLDB database to optimise performance

Methods inherited from class yass.database.Database

addEventClass, commit, commitIfRequired, createPreparedStatement, createStatement, empty, getConnection, getDbContainerDirectory, getDbDirectory, getDbName, getDbPassword, getDbProperties, getDbServer, getDbUsername, getDeleteOnShutdown, getDropTablesOnShutdown, getEventClasses, getStatementCommitThreshold, getStatementCounter, getType, isAnalysisMode, isRunning, purgeSimulation, rollback, setAnalysisMode, setDeleteOnShutdown, setDropTablesOnShutdown, shutdown, startup

Methods inherited from class java.lang.Object

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

Field Detail

log

private static org.apache.log4j.Logger log

The logger

Constructor Detail

HsqldbDatabase

public HsqldbDatabase()

Creates a new instance of HsqldbDatabase using default values for reasonable but untuned performance

HsqldbDatabase

public HsqldbDatabase(java.lang.String databaseName,
                      java.util.Set<java.lang.Class> eventClasses,
                      int statementCommitThreshold)

Creates a new instance of HsqldbDatabase

Parameters:

databaseName - the desired database name to which a random sequence of numbers will be appended automatically

eventClasses - the set of event classes managed by this database

statementCommitThreshold - the maximum number of database-changing actions permitted before a commit is forced automatically

Method Detail

createDbProperties

protected java.util.Properties createDbProperties()

Creates a properties object containing the database parameters supplied by the user and application to HSQLDB during database creation

Returns:

the properties object

setDatabaseProperties

protected void setDatabaseProperties()
                              throws java.sql.SQLException

Sets dynamic properties on the underlying HSQLDB database to optimise performance

Specified by:

setDatabaseProperties in class Database

Throws:

java.sql.SQLException - if the properies cannot be set

createConnection

protected void createConnection()
                         throws java.sql.SQLException

Creates a connection to the underlying database

Specified by:

createConnection in class Database

Throws:

java.sql.SQLException - if the connection cannot be created