org.springframework.batch.item.database.builder

Class JpaCursorItemReaderBuilder<T>

java.lang.Object

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

public class JpaCursorItemReaderBuilder<T>
extends java.lang.Object

Builder for JpaCursorItemReader.

Since:

4.3

Author:

Mahmoud Ben Hassine

Constructor Summary

Constructors

Constructor and Description
JpaCursorItemReaderBuilder()

Method Summary

Modifier and Type	Method and Description
JpaCursorItemReader<T>	build() Returns a fully constructed JpaCursorItemReader.
JpaCursorItemReaderBuilder<T>	currentItemCount(int currentItemCount) Index for the current item.
JpaCursorItemReaderBuilder<T>	entityManagerFactory(javax.persistence.EntityManagerFactory entityManagerFactory) The EntityManagerFactory to be used for executing the configured queryString.
JpaCursorItemReaderBuilder<T>	maxItemCount(int maxItemCount) Configure the max number of items to be read.
JpaCursorItemReaderBuilder<T>	name(java.lang.String name) The name used to calculate the key within the ExecutionContext.
JpaCursorItemReaderBuilder<T>	parameterValues(java.util.Map<java.lang.String,java.lang.Object> parameterValues) A map of parameter values to be set on the query.
JpaCursorItemReaderBuilder<T>	queryProvider(JpaQueryProvider queryProvider) A query provider.
JpaCursorItemReaderBuilder<T>	queryString(java.lang.String queryString) The JPQL query string to execute.
JpaCursorItemReaderBuilder<T>	saveState(boolean saveState) Configure if the state of the ItemStreamSupport should be persisted within the ExecutionContext for restart purposes.

Methods inherited from class java.lang.Object

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

Constructor Detail

JpaCursorItemReaderBuilder

public JpaCursorItemReaderBuilder()

Method Detail

saveState

public JpaCursorItemReaderBuilder<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 JpaCursorItemReaderBuilder<T> name(java.lang.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 JpaCursorItemReaderBuilder<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 JpaCursorItemReaderBuilder<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)

parameterValues

public JpaCursorItemReaderBuilder<T> parameterValues(java.util.Map<java.lang.String,java.lang.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:

JpaCursorItemReader.setParameterValues(Map)

queryProvider

public JpaCursorItemReaderBuilder<T> queryProvider(JpaQueryProvider queryProvider)

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

Parameters:

queryProvider - the query provider

Returns:

this instance for method chaining

See Also:

JpaCursorItemReader.setQueryProvider(JpaQueryProvider)

queryString

public JpaCursorItemReaderBuilder<T> queryString(java.lang.String queryString)

The JPQL query string to execute. This should only be set if queryProvider(JpaQueryProvider) has not been set.

Parameters:

queryString - the JPQL query

Returns:

this instance for method chaining

See Also:

JpaCursorItemReader.setQueryString(String)

entityManagerFactory

public JpaCursorItemReaderBuilder<T> entityManagerFactory(javax.persistence.EntityManagerFactory entityManagerFactory)

The EntityManagerFactory to be used for executing the configured queryString.

Parameters:

entityManagerFactory - EntityManagerFactory used to create EntityManager

Returns:

this instance for method chaining

build

public JpaCursorItemReader<T> build()

Returns a fully constructed JpaCursorItemReader.

Returns:

a new JpaCursorItemReader