Package org.springframework.batch.item.database.builder

Class HibernatePagingItemReaderBuilder<T>

java.lang.Object

org.springframework.batch.item.database.builder.HibernatePagingItemReaderBuilder<T>

public class HibernatePagingItemReaderBuilder<T>
extends Object

A builder for the HibernatePagingItemReader. When configuring, only one of the following should be provided:

• queryString(String)
• queryName(String)
• queryProvider(HibernateQueryProvider)

Since:

4.0

Author:

Michael Minella, Glenn Renfro, Mahmoud Ben Hassine

See Also:

• HibernatePagingItemReader

Constructor Summary

Constructors

Constructor	Description
HibernatePagingItemReaderBuilder()

Method Summary

Modifier and Type	Method	Description
HibernatePagingItemReader<T>	build()	Returns a fully constructed HibernatePagingItemReader.
HibernatePagingItemReaderBuilder<T>	currentItemCount(int currentItemCount)	Index for the current item.
HibernatePagingItemReaderBuilder<T>	fetchSize(int fetchSize)	Fetch size used internally by Hibernate to limit amount of data fetched from database per round trip.
HibernatePagingItemReaderBuilder<T>	maxItemCount(int maxItemCount)	Configure the max number of items to be read.
HibernatePagingItemReaderBuilder<T>	name(String name)	The name used to calculate the key within the ExecutionContext.
HibernatePagingItemReaderBuilder<T>	pageSize(int pageSize)	The number of records to request per page/query.
HibernatePagingItemReaderBuilder<T>	parameterValues(Map<String,Object> parameterValues)	A map of parameter values to be set on the query.
HibernatePagingItemReaderBuilder<T>	queryName(String queryName)	The name of the Hibernate named query to be executed for this reader.
HibernatePagingItemReaderBuilder<T>	queryProvider(HibernateQueryProvider<T> queryProvider)	A query provider.
HibernatePagingItemReaderBuilder<T>	queryString(String queryString)	The HQL query string to execute.
HibernatePagingItemReaderBuilder<T>	saveState(boolean saveState)	Configure if the state of the ItemStreamSupport should be persisted within the ExecutionContext for restart purposes.
HibernatePagingItemReaderBuilder<T>	sessionFactory(org.hibernate.SessionFactory sessionFactory)	The Hibernate SessionFactory to execute the query against.
HibernatePagingItemReaderBuilder<T>	useStatelessSession(boolean useStatelessSession)	Indicator for whether to use a StatelessSession (true) or a Session (false).

Methods inherited from class java.lang.Object

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

Constructor Details

HibernatePagingItemReaderBuilder

public HibernatePagingItemReaderBuilder()

Method Details

saveState

public HibernatePagingItemReaderBuilder<T> saveState(boolean saveState)

Configure if the state of the ItemStreamSupport should be persisted within the ExecutionContext for restart purposes.

Parameters:

saveState - defaults to true

Returns:

The current instance of the builder.

name

public HibernatePagingItemReaderBuilder<T> name(String name)

The name used to calculate the key within the ExecutionContext. Required if saveState(boolean) is set to true.

Parameters:

name - name of the reader instance

Returns:

The current instance of the builder.

See Also:

• ItemStreamSupport.setName(String)

maxItemCount

public HibernatePagingItemReaderBuilder<T> maxItemCount(int maxItemCount)

Configure the max number of items to be read.

Parameters:

maxItemCount - the max items to be read

Returns:

The current instance of the builder.

See Also:

• AbstractItemCountingItemStreamItemReader.setMaxItemCount(int)

currentItemCount

public HibernatePagingItemReaderBuilder<T> currentItemCount(int currentItemCount)

Index for the current item. Used on restarts to indicate where to start from.

Parameters:

currentItemCount - current index

Returns:

this instance for method chaining

See Also:

• AbstractItemCountingItemStreamItemReader.setCurrentItemCount(int)

pageSize

public HibernatePagingItemReaderBuilder<T> pageSize(int pageSize)

The number of records to request per page/query. Defaults to 10. Must be greater than zero.

Parameters:

pageSize - number of items

Returns:

this instance for method chaining

See Also:

• AbstractPagingItemReader.setPageSize(int)

parameterValues

public HibernatePagingItemReaderBuilder<T> parameterValues(Map<String,Object> parameterValues)

A map of parameter values to be set on the query. The key of the map is the name of the parameter to be set with the value being the value to be set.

Parameters:

parameterValues - map of values

Returns:

this instance for method chaining

See Also:

• HibernatePagingItemReader.setParameterValues(Map)

queryName

public HibernatePagingItemReaderBuilder<T> queryName(String queryName)

The name of the Hibernate named query to be executed for this reader.

Parameters:

queryName - name of the query to execute

Returns:

this instance for method chaining

See Also:

• HibernatePagingItemReader.setQueryName(String)

fetchSize

public HibernatePagingItemReaderBuilder<T> fetchSize(int fetchSize)

Fetch size used internally by Hibernate to limit amount of data fetched from database per round trip.

Parameters:

fetchSize - number of records

Returns:

this instance for method chaining

See Also:

• HibernatePagingItemReader.setFetchSize(int)

queryProvider

public HibernatePagingItemReaderBuilder<T> queryProvider(HibernateQueryProvider<T> queryProvider)

A query provider. This should be set only if queryString(String) and queryName(String) have not been set.

Parameters:

queryProvider - the query provider

Returns:

this instance for method chaining

See Also:

• HibernatePagingItemReader.setQueryProvider(HibernateQueryProvider)

queryString

public HibernatePagingItemReaderBuilder<T> queryString(String queryString)

The HQL query string to execute. This should only be set if queryProvider(HibernateQueryProvider) and queryName(String) have not been set.

Parameters:

queryString - the HQL query

Returns:

this instance for method chaining

See Also:

• HibernatePagingItemReader.setQueryString(String)

sessionFactory

public HibernatePagingItemReaderBuilder<T> sessionFactory(org.hibernate.SessionFactory sessionFactory)

The Hibernate SessionFactory to execute the query against.

Parameters:

sessionFactory - the session factory

Returns:

this instance for method chaining

See Also:

• HibernatePagingItemReader.setSessionFactory(SessionFactory)

useStatelessSession

public HibernatePagingItemReaderBuilder<T> useStatelessSession(boolean useStatelessSession)

Indicator for whether to use a StatelessSession (true) or a Session (false).

Parameters:

useStatelessSession - Defaults to false

Returns:

this instance for method chaining

See Also:

• HibernatePagingItemReader.setUseStatelessSession(boolean)

build

public HibernatePagingItemReader<T> build()

Returns a fully constructed HibernatePagingItemReader.

Returns:

a new HibernatePagingItemReader