Strategy interface for providing the data. Implementations are expected to be stateful and will be called multiple times for each batch, with each call to Read() returning a different value and finally returning null when all input data is exhausted. Implementations need not be thread-safe and clients of a IItemReader need to be aware that this is the case. A richer interface (e.g. with a look ahead or peek) is not feasible because we need to support transactions in an asynchronous batch.
More...
Public Member Functions | |
| T | Read () |
Reads a piece of input data and advance to the next one. Implementations must return null at the end of the input data set. In a transactional setting, caller might get the same item twice from successive calls (or otherwise), if the first call was in a transaction that rolled back. More... | |
Detailed Description
Strategy interface for providing the data. Implementations are expected to be stateful and will be called multiple times for each batch, with each call to Read() returning a different value and finally returning null when all input data is exhausted. Implementations need not be thread-safe and clients of a IItemReader need to be aware that this is the case. A richer interface (e.g. with a look ahead or peek) is not feasible because we need to support transactions in an asynchronous batch.
- Template Parameters
-
T The type of the read items. Must be nullable.
- Type Constraints
-
T : class
Member Function Documentation
| T Summer.Batch.Infrastructure.Item.IItemReader< out out T >.Read | ( | ) |
Reads a piece of input data and advance to the next one. Implementations must return null at the end of the input data set. In a transactional setting, caller might get the same item twice from successive calls (or otherwise), if the first call was in a transaction that rolled back.
- Returns
- Exceptions
-
Exception UnexpectedInputException NonTransientResourceException ParseException
The documentation for this interface was generated from the following file:
- Summer.Batch.Infrastructure/Item/IItemReader.cs