类 JpaPagingItemReaderBuilder<T>

构造器详细资料

• JpaPagingItemReaderBuilder

  public JpaPagingItemReaderBuilder()

方法详细资料

• saveState

  public JpaPagingItemReaderBuilder<T> saveState​(boolean saveState)

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

  参数:

  saveState - defaults to true

  返回:

  The current instance of the builder.

• name

  public JpaPagingItemReaderBuilder<T> name​(java.lang.String name)

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

  参数:

  name - name of the reader instance

  返回:

  The current instance of the builder.

  另请参阅:

  ItemStreamSupport.setName(String)

• maxItemCount

  public JpaPagingItemReaderBuilder<T> maxItemCount​(int maxItemCount)

  Configure the max number of items to be read.

  参数:

  maxItemCount - the max items to be read

  返回:

  The current instance of the builder.

  另请参阅:

  AbstractItemCountingItemStreamItemReader.setMaxItemCount(int)

• currentItemCount

  public JpaPagingItemReaderBuilder<T> currentItemCount​(int currentItemCount)

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

  参数:

  currentItemCount - current index

  返回:

  this instance for method chaining

  另请参阅:

  AbstractItemCountingItemStreamItemReader.setCurrentItemCount(int)

• pageSize

  public JpaPagingItemReaderBuilder<T> pageSize​(int pageSize)

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

  参数:

  pageSize - number of items

  返回:

  this instance for method chaining

  另请参阅:

  AbstractPagingItemReader.setPageSize(int)

• parameterValues

  public JpaPagingItemReaderBuilder<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.

  参数:

  parameterValues - map of values

  返回:

  this instance for method chaining

  另请参阅:

  JpaPagingItemReader.setParameterValues(Map)

• queryProvider

  public JpaPagingItemReaderBuilder<T> queryProvider​(JpaQueryProvider queryProvider)

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

  参数:

  queryProvider - the query provider

  返回:

  this instance for method chaining

  另请参阅:

  JpaPagingItemReader.setQueryProvider(JpaQueryProvider)

• queryString

  public JpaPagingItemReaderBuilder<T> queryString​(java.lang.String queryString)

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

  参数:

  queryString - the HQL query

  返回:

  this instance for method chaining

  另请参阅:

  JpaPagingItemReader.setQueryString(String)

• transacted

  public JpaPagingItemReaderBuilder<T> transacted​(boolean transacted)

  Indicates if a transaction should be created around the read (true by default). Can be set to false in cases where JPA implementation doesn't support a particular transaction, however this may cause object inconsistency in the EntityManagerFactory.

  参数:

  transacted - defaults to true

  返回:

  this instance for method chaining

  另请参阅:

  JpaPagingItemReader.setTransacted(boolean)

• entityManagerFactory

  public JpaPagingItemReaderBuilder<T> entityManagerFactory​(javax.persistence.EntityManagerFactory entityManagerFactory)

  The EntityManagerFactory to be used for executing the configured queryString.

  参数:

  entityManagerFactory - EntityManagerFactory used to create EntityManager

  返回:

  this instance for method chaining

• build

  public JpaPagingItemReader<T> build()

  Returns a fully constructed JpaPagingItemReader.

  返回:

  a new JpaPagingItemReader