:star: New features

• Add support for Virtual Threads #4399
• Add synchronized decorators for non-stream item readers/writers #4368
• Add option to clear the persistence context in JpaItemWriter #804
• Add cursor-based ItemReader for MongoDB #4323
• Add support for bulk inserts in MongoItemWriter #4149
• Provide accessors in MongoItemWriter to facilitate extensions #3973
• Add item reader for Redis #4446
• Add item writer for Redis #3957
• Add ability to start a job flow definition with a decider #4411
• Add support to specify the database type through EnableBatchProcessing #4320
• Auto-configure JobRegistryBeanPostProcessor with EnableBatchProcessing and DefaultBatchConfiguration #4245
• Add support for Java Date and Time API types serialization in Jackson2ExecutionContextStringSerializer #3952
• Add option to provide a custom JobKeyGenerator in JdbcJobInstanceDao #3926
• Access to update counts in JdbcBatchItemWriter #3829
• Add setter for ObservationConvention in StepBuilder/JobBuilder #4401

:rocket: Enhancements

• Public access to AbstractItemCountingItemStreamItemReader.getCurrentItemCount #1639
• Add java.util.concurrent.ConcurrentHashMap to the trusted classes list in Jackson2ExecutionContextStringSerializer #4407
• Add java.sql.Date to the trusted classes list in Jackson2ExecutionContextStringSerializer #4407
• Auto-detect the class/interface to be mocked #4426
• Inaccurate exception message in SimpleJobRepository #4025
• Expose the internal map in ExecutionContext as read-only #4004
• Add support for quotes in DelimitedLineAggregator #1139
• Provide better error message in StaxEventItemReader if Resource does not exist #1171
• Add getters for DAOs in SimpleJobExplorer #1598
• Use separate parameters for short_context length and exit_message length #1617
• Expose targetObject and targetMethod in AbstractMethodInvokingDelegator #1786
• Create versions of samples using Java configuration #3663
• Improve the issue reporting process #4329
• Replace deprecated RetryListenerSupport #4453
• Use more SynchronizedItemReader in tests #4452
• Take care of some deprecations #4454

:lady_beetle: Bug fixes

• Invalid migration script for H2 #4390
• Incorrect drop statements in SQLServer DDL script #4373
• SplitBuilder.add(Flow) causes hung execution in some cases #3857
• Incorrect thread usage in SynchronizedItemStreamReaderTests #837
• Concurrent execution of FlowJob may cause FlowExecutionException #4092
• Switching incrementers causes jobs to have old job parameters #4073
• Missing setter for strict field in DelimitedBuilder #809
• DefaultJobParametersExtractor no longer copies keys from JobParameters when not contained in ExecutionContext #4458
• job scope bean doesn't cleanup in unit test #1288
• NullPointerException in RepeatTemplate#doHandle() when unwrapIfRethrown() returns null if logging in DEBUG #1123
• Starting a flow with Flow#next makes the first step execute twice #4432

:notebook_with_decorative_cover: Documentation

• Incorrect Javadoc in SimpleStepBuilder #4402
• Document the type and name of the surrounding job in JobLauncherTestUtils#launchStep #3825
• Fix typo in SimpleMailMessageItemWriter Javadoc #4381
• Fix javadoc errors and warnings #1624
• Migrate documentation to Antora #4422
• Ambiguous description of "Configuring a JobRepository" #4333
• Add Two minutes tutorial to the README #4329
• Update the Getting started guide #4329
• Broken code samples in reference documentation for Job/Step beans with v5 API #4406
• Improve developer experience for conditional flows #4460
• Incorrect Javadoc in DefaultFieldSet and DefaultFieldSetFactory #4494
• Incorrect JavaDoc for Methods returning JobFlowBuilder in JobBuilder #4415
• Update documentation about serializable keys in the execution context #4457
• Improve configuration style toggle in documentation #4357
• Improve the getting started experience with Spring Batch #4329
• Reinstate and Update FAQ page #3878
• Outdated Meta-data ERD #4358
• Documentation unclear on how to replace deprecated AbstractTaskletStepBuilder#throttleLimit #4389

:hammer: Tasks

• Build failure when the default charset of the JVM is not UTF-8 #4417
• Rename MongoItemReader to MongoPagingItemReader #4341
• Deprecate jobRepository method in JobBuilderHelper & StepBuilderHelper #4326
• Add Automatic-Module-Name to MANIFEST.MF in all components #867
• Deprecate overrides of StepBuilderHelper#repository for removal #4495

:hammer: Dependency upgrades

• Spring Framework 6.1.0
• Spring Integration 6.2.0
• Spring Data 3.2.0
• Spring LDAP 3.2.0
• Spring AMQP 3.1.0
• Spring Kafka 3.1.0
• Micrometer 1.12.0

:heart: Contributors

Thank you to all the contributors who worked on this release!

@IlyaNerd, @ParadiseCHOI, @benelog, @rwinch, @cppwfs, @sjh836, @hpoettker, @jwillebrands, @hwan33, @bio-engineer, @injae-kim, @morenomjc, @LichKing-lee, @santfirax, @acktsap, @sukanth, @seonwoo960000, @robertmcnees, @cgrings, @juchanei, @lsq27, @scordio, @CNJingo, @woniper, @pranavjandu

Full change log: https://github.com/spring-projects/spring-batch/compare/v5.0.3...v5.1.0