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Update the what's new section

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Mahmoud Ben Hassine
2023-08-23 15:46:59 -07:00
parent 63ae725559
commit 24253e762b
1 changed files with 29 additions and 6 deletions
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spring-batch-docs/src/main/asciidoc/whatsnew.adoc
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@@ -14,17 +14,19 @@ Spring Batch 5.1 introduces the following features:
* <<virtual-threads-support>>
* <<memory-management-improvement-jpaitemwriter>>
* <<new-synchronized-decorators>>
* <<new-cursor-based-mongo-item-reader>>
* <<bulk-inserts-support-mongo-item-writer>>
[[dependencies-upgrade]]
=== Dependencies upgrade
In this release, the Spring dependencies are updated to the following versions:
In this release, the Spring dependencies are upgraded to the following versions:
* Spring Framework 6.1.0-M2
* Spring Integration 6.2.0-M1
* Spring Data 3.2.0-M1
* Spring LDAP 3.2.0-M1
* Micrometer 1.12.0-M1
* Spring Framework 6.1.0-M4
* Spring Integration 6.2.0-M2
* Spring Data 3.2.0-M2
* Spring LDAP 3.2.0-M2
* Micrometer 1.12.0-M2
[[virtual-threads-support]]
=== Virtual Threads support
@@ -63,3 +65,24 @@ those decorators cannot be used to synchronize access to `ListItemReader#read` o
For users convenience, this release introduces new decorators for non-item streams as well. With this new feature, all
item readers and writers in Spring Batch can now be synchronized without having to write custom decorators.
[[new-cursor-based-mongo-item-reader]]
=== New Cursor-based MongoItemReader
Up to version 5.0, the `MongoItemReader` provided by Spring Batch used pagination, which is based on MongoDB's `skip` operation.
While this works well for small/medium data sets, it starts to perform poorly with large data sets.
This release introduces the `MongoCursorItemReader`, a new cursor-based item reader for MongoDB. This implementation
uses cursors instead paging to read data from MongoDB, which improves the performance of reads on large collections.
For consistency with other cursor/paging readers, the current `MongoItemReader` has been renamed to `MongoPagingItemReader`.
[[bulk-inserts-support-mongo-item-writer]]
=== Bulk inserts support in MongoItemWriter
Up to version 5.0, the `MongoItemWriter` supported two operations: `upsert` and `delete`. While the `upsert`
operation works well for both inserts and updates, it does not perform well for items that are known to be new
in the target collection.
Similar to the `persist` and `merge` operations in the `JpaItemWriter`, this release adds a new operation named
`insert` in the `MongoItemWriter`, which is designed for bulk inserts. This new option performs better than
`upsert` for new items as it does not require an additional lookup to check if items already exist in the target collection.