org.openspaces.persistency.hibernate.iterator

Class StatelessChunkScrollableDataIterator

java.lang.Object

org.openspaces.persistency.hibernate.iterator.AbstractChunkDataIterator

org.openspaces.persistency.hibernate.iterator.StatelessChunkScrollableDataIterator

All Implemented Interfaces:

DataIterator, Iterator, MultiDataIterator

public class StatelessChunkScrollableDataIterator
extends AbstractChunkDataIterator

A stateless batch iterator that is based on StatelessScrollableDataIterator for each chunk.

Author:

kimchy

Field Summary

Fields inherited from class org.openspaces.persistency.hibernate.iterator.AbstractChunkDataIterator

chunkSize, entityName, fetchSize, hQuery, perfromOrderById, sessionFactory, sqlQuery

Constructor Summary

Constructors

Constructor and Description
StatelessChunkScrollableDataIterator(SQLQuery sqlQuery, org.hibernate.SessionFactory sessionFactory, int fetchSize, boolean performOrderById, int chunkSize) Constructs a scrollable iterator over the given GigaSpaces SQLQuery.
StatelessChunkScrollableDataIterator(String entityName, org.hibernate.SessionFactory sessionFactory, int fetchSize, boolean performOrderById, int chunkSize) Constructs a scrollable iterator over the given entity name.
StatelessChunkScrollableDataIterator(String hQuery, org.hibernate.SessionFactory sessionFactory, int fetchSize, int chunkSize) Constructs a scrollable iterator over the given hibernate query string.

Method Summary

Modifier and Type	Method and Description
protected DataIterator	createIteratorByEntityName(String entityName, org.hibernate.SessionFactory sessionFactory, int fetchSize, boolean performOrderById, int from, int size)
protected DataIterator	createIteratorByHibernateQuery(String hQuery, org.hibernate.SessionFactory sessionFactory, int fetchSize, int from, int size)
protected DataIterator	createIteratorBySQLQuery(SQLQuery sqlQuery, org.hibernate.SessionFactory sessionFactory, int fetchSize, boolean performOrderById, int from, int size)

Methods inherited from class org.openspaces.persistency.hibernate.iterator.AbstractChunkDataIterator

close, hasNext, iterators, next, remove

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Iterator

forEachRemaining

Constructor Detail

StatelessChunkScrollableDataIterator

public StatelessChunkScrollableDataIterator(String entityName,
                                            org.hibernate.SessionFactory sessionFactory,
                                            int fetchSize,
                                            boolean performOrderById,
                                            int chunkSize)

Constructs a scrollable iterator over the given entity name.

Parameters:

entityName - The entity name to scroll over

sessionFactory - The session factory to use to construct the session

fetchSize - The fetch size of the scrollabale result set

performOrderById - Should the query perform order by id or not

chunkSize - The size of the chunks the entity table will be broken to

StatelessChunkScrollableDataIterator

public StatelessChunkScrollableDataIterator(SQLQuery sqlQuery,
                                            org.hibernate.SessionFactory sessionFactory,
                                            int fetchSize,
                                            boolean performOrderById,
                                            int chunkSize)

Constructs a scrollable iterator over the given GigaSpaces SQLQuery.

Parameters:

sqlQuery - The SQLQuery to scroll over

sessionFactory - The session factory to use to construct the session

fetchSize - The fetch size of the scrollabale result set

performOrderById - Should the query perform order by id or not

chunkSize - The size of the chunks the entity table will be broken to

StatelessChunkScrollableDataIterator

public StatelessChunkScrollableDataIterator(String hQuery,
                                            org.hibernate.SessionFactory sessionFactory,
                                            int fetchSize,
                                            int chunkSize)

Constructs a scrollable iterator over the given hibernate query string.

Parameters:

hQuery - The hiberante query string to scroll over

sessionFactory - The session factory to use to construct the session

fetchSize - The fetch size of the scrollabale result set

chunkSize - The size of the chunks the entity table will be broken to

Method Detail

createIteratorByEntityName

protected DataIterator createIteratorByEntityName(String entityName,
                                                  org.hibernate.SessionFactory sessionFactory,
                                                  int fetchSize,
                                                  boolean performOrderById,
                                                  int from,
                                                  int size)

Specified by:

createIteratorByEntityName in class AbstractChunkDataIterator

createIteratorBySQLQuery

protected DataIterator createIteratorBySQLQuery(SQLQuery sqlQuery,
                                                org.hibernate.SessionFactory sessionFactory,
                                                int fetchSize,
                                                boolean performOrderById,
                                                int from,
                                                int size)

Specified by:

createIteratorBySQLQuery in class AbstractChunkDataIterator

createIteratorByHibernateQuery

protected DataIterator createIteratorByHibernateQuery(String hQuery,
                                                      org.hibernate.SessionFactory sessionFactory,
                                                      int fetchSize,
                                                      int from,
                                                      int size)

Specified by:

createIteratorByHibernateQuery in class AbstractChunkDataIterator