SpringSource/spring-batch — pull request #65 by mminella (2012-11-02 20:12:06+00:00)
Title: BATCH-1749: JdbcPagingItemReader now supports multi-column keys

Added the ability to supply multiple column keys for the JdbcPagingItemReader. This is supported with two main changes:

1. Changing the sortKey attribute on the query providers from a single String to a Map where the String is the name of the column and the Boolean indicates ascending/descending (ascending = true). Samples project has been updated to show the new configuration.
2. Updated the generation of the queries. In order to support restartability, a map of the current key values is persisted.