diff --git a/docs/src/site/docbook/reference/readersAndWriters.xml b/docs/src/site/docbook/reference/readersAndWriters.xml
index 2430e1586..d15854e06 100644
--- a/docs/src/site/docbook/reference/readersAndWriters.xml
+++ b/docs/src/site/docbook/reference/readersAndWriters.xml
@@ -1182,28 +1182,18 @@
Multi-File Input
- It a is common requirement to process multiple files in a single
- step (e.g. all files in given directory, or files matching given pattern).
- MultiResourceItemReader supports multi-file input
- by wrapping a delegate
- ResourceAwareItemReaderItemStream (both
- FlatFileItemReader and
- StaxEventItemReader implement this interface).
- MultiResourceItemReader uses the delegate to read
- items from the resource and takes care of correct rollback functionality
- (potentially spanning file boundaries) as well as efficient restart (skips
- already processed files without re-reading them).
+ It is a common requirement to process multiple files within a single
+ Step. Assuming the files are all formatted the same, the
+ MultiResourceItemReader supports this type of input
+ for both XML and FlatFile processing. Consider the following files in a
+ directory:
- To restart correctly file ordering needs to be preserved between job
- runs, which may not be easy to guarantee. In such circumstances we suggest
- to use SortedMultiResourceItemReader which first
- sorts resources using injected Comparator. By
- default resources are ordered alphabetically by filename.
+ file-1.txt file-2.txt ignored.txt
- Below is an example configuration where the
- SortedMultiResourceItemReader is configured to read
- multiple flat files (note standard Spring syntax is used to specify the
- resources):
+ file-1.txt and file-2.txt are formatted the same and for business
+ reasons should be processed together. The
+ MuliResourceItemReader can be used to read in both
+ files by using wildcards:
<bean id="multiResourceReader" class="org.springframework.batch.item.SortedMultiResourceItemReader">
@@ -1212,6 +1202,14 @@
</bean>
+
+ The referenced delegate is a simple
+ FlatFileItemReader. The above configuration will
+ read input from both files, handling rollback and restart scenarios. It
+ should be noted that, as with any ItemReader, adding extra input (in this
+ case a file) could cause potential issues when restarting. It is
+ recommended that batch jobs work with their own individual directories
+ until completed successfully.
@@ -2225,7 +2223,7 @@
<property name="mapper">
<bean class="org.springframework.batch.sample.mapping.PlayerSummaryMapper" />
</property>
- <property name="saveState" value="false" />
+ <property name="saveState" value="false" />
<property name="sql">
<value>
SELECT games.player_id, games.year_no, SUM(COMPLETES),