类 JdbcPagingItemReaderBuilder<T>

构造器详细资料

• JdbcPagingItemReaderBuilder

  public JdbcPagingItemReaderBuilder()

方法详细资料

• saveState

  public JdbcPagingItemReaderBuilder<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 JdbcPagingItemReaderBuilder<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 JdbcPagingItemReaderBuilder<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 JdbcPagingItemReaderBuilder<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)

• dataSource

  public JdbcPagingItemReaderBuilder<T> dataSource​(javax.sql.DataSource dataSource)

  The DataSource to query against. Required.

  参数:

  dataSource - the DataSource

  返回:

  this instance for method chaining

  另请参阅:

  JdbcPagingItemReader.setDataSource(DataSource)

• fetchSize

  public JdbcPagingItemReaderBuilder<T> fetchSize​(int fetchSize)

  A hint to the underlying RDBMS as to how many records to return with each fetch.

  参数:

  fetchSize - number of records

  返回:

  this instance for method chaining

  另请参阅:

  JdbcPagingItemReader.setFetchSize(int)

• rowMapper

  public JdbcPagingItemReaderBuilder<T> rowMapper​(org.springframework.jdbc.core.RowMapper<T> rowMapper)

  The RowMapper used to map the query results to objects. Required.

  参数:

  rowMapper - a RowMapper implementation

  返回:

  this instance for method chaining

  另请参阅:

  JdbcPagingItemReader.setRowMapper(RowMapper)

• parameterValues

  public JdbcPagingItemReaderBuilder<T> parameterValues​(java.util.Map<java.lang.String,​java.lang.Object> parameterValues)

  A Map of values to set on the SQL's prepared statement.

  参数:

  parameterValues - Map of values

  返回:

  this instance for method chaining

  另请参阅:

  JdbcPagingItemReader.setParameterValues(Map)

• pageSize

  public JdbcPagingItemReaderBuilder<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)

• groupClause

  public JdbcPagingItemReaderBuilder<T> groupClause​(java.lang.String groupClause)

  The SQL GROUP BY clause for a db specific @PagingQueryProvider. This is only used if a PagingQueryProvider is not provided.

  参数:

  groupClause - the SQL clause

  返回:

  this instance for method chaining

  另请参阅:

  AbstractSqlPagingQueryProvider.setGroupClause(String)

• selectClause

  public JdbcPagingItemReaderBuilder<T> selectClause​(java.lang.String selectClause)

  The SQL SELECT clause for a db specific PagingQueryProvider. This is only used if a PagingQueryProvider is not provided.

  参数:

  selectClause - the SQL clause

  返回:

  this instance for method chaining

  另请参阅:

  AbstractSqlPagingQueryProvider.setSelectClause(String)

• fromClause

  public JdbcPagingItemReaderBuilder<T> fromClause​(java.lang.String fromClause)

  The SQL FROM clause for a db specific PagingQueryProvider. This is only used if a PagingQueryProvider is not provided.

  参数:

  fromClause - the SQL clause

  返回:

  this instance for method chaining

  另请参阅:

  AbstractSqlPagingQueryProvider.setFromClause(String)

• whereClause

  public JdbcPagingItemReaderBuilder<T> whereClause​(java.lang.String whereClause)

  The SQL WHERE clause for a db specific PagingQueryProvider. This is only used if a PagingQueryProvider is not provided.

  参数:

  whereClause - the SQL clause

  返回:

  this instance for method chaining

  另请参阅:

  AbstractSqlPagingQueryProvider.setWhereClause(String)

• sortKeys

  public JdbcPagingItemReaderBuilder<T> sortKeys​(java.util.Map<java.lang.String,​Order> sortKeys)

  The keys to sort by. These keys must create a unique key.

  参数:

  sortKeys - keys to sort by and the direction for each.

  返回:

  this instance for method chaining

  另请参阅:

  AbstractSqlPagingQueryProvider.setSortKeys(Map)

• queryProvider

  public JdbcPagingItemReaderBuilder<T> queryProvider​(PagingQueryProvider provider)

  A PagingQueryProvider to provide the queries required. If provided, the SQL fragments configured via selectClause(String), fromClause(String), whereClause(String), groupClause, and sortKeys(Map) are ignored.

  参数:

  provider - the db specific query provider

  返回:

  this instance for method chaining

  另请参阅:

  JdbcPagingItemReader.setQueryProvider(PagingQueryProvider)

• build

  public JdbcPagingItemReader<T> build()

  Provides a completely built instance of the JdbcPagingItemReader

  返回:

  a JdbcPagingItemReader