v5.2.0-RC1

⭐ New features

• Allow Subclasses in the CompositeItemReader #4682

🐞 Bug fixes

• Wrong column types in JdbcStepExecutionDao #4648
• MongoStepExecutionDao returns an different stepExecution if a job has multiple steps spring-projects-experimental/spring-batch-experimental/issues/3

🚀 Enhancements

• Missing @FunctionalInterface in JobKeyGenerator #4613

📔 Documentation

• Missing documentation about MultiResourceItemWriter not creating empty files when no data goes through delegates #4645
• Typo in the documentation chapter Spring Batch Integration #4649

🆙 Dependency Upgrades

• Spring Framework: 6.2.0-RC2
• Spring Retry: 2.0.10
• Micrometer: 1.14.0-RC1
• Spring Integration: 6.4.0-RC1
• Spring AMQP: 3.2.0-RC1
• Spring Kafka: 3.3.0-RC1
• Spring Data: 3.4.0-RC1
• Spring Ldap: 3.2.7

❤️ Contributors

Many thanks to all contributors who worked on this release!

---

Full change log: v5.2.0-M2...v5.2.0-RC1

v5.2.0-M2

⭐ New features

• Add support for MongoDB as JobRepository #877

• Introduce a resourceless job repository implementation #4679

• Add adapters for Java functional interfaces #4672

• Add ability to customize the job parameters converter in the default batch configuration #4650

• Add DatabaseType POSTGRES for the product name EnterpriseDB #4627

• Simple CompositeItemReader analogous to CompositeItemWriter and CompositeItemProcessor #757

• Allow dependent steps to start concurrently #2044

• Add blocking queue item reader/writer to enable implementing the staged event-driven architecture in batch jobs #2350

🚀 Enhancements

• Bad performance of GET_LAST_STEP_EXECUTION query on DB2 with large STEP_EXECUTION table #4657

🔨 Tasks

• Deprecate the usage of LobHandler #4588
• Deprecate SystemPropertyInitializer #4680

❤️ Contributors

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

---

Full change log: v5.2.0-M1...v5.2.0-M2

v5.2.0-M1

⭐ New features

• Add support for data classes in JdbcCursorItemReaderBuilder & JdbcPagingItemReaderBuilder #4578
• Add support for query hints in JPA item readers #4479
• Add possibility to configure line separator in RecursiveCollectionLineAggregator #4594
• Revisit the mechanism of job registration #4547
• Add JobRegistrySmartInitializingSingleton #4521

🐞 Bug fixes

• Incorrect bean configuration in DefaultBatchConfiguration #4543
• BeanPostProcessorChecker.postProcessAfterInitialization WARNING after upgrade spring-framework-6.1.0 #4489
• Possible duplicate state transitions in flow definition #3674
• Order of Transition Elements Still Does Not completely adhere to documentation #3996
• Memory leak in MessageChannelPartitionHandler when polling the database #4598
• ListItemWriter<T>::getWrittenItems has bad wildcard return type #4576
• SimpleBinaryBufferedReaderFactory misses line endings #811
• StepExecution.getEndTime() returns null in StepExecutionListener.afterStep() #3846
• Default value for ignoreWarnings in JdbcCursorItemReaderBuilder does not align with documentation #4570
• Remote partitioning doesn't work if you're using graalvm #4564
• SystemCommandTasklet does not propagate errors #4483
• Incorrect Chunk property value in implementation of ItemWriter write method #4560
• Incorrect step configuration when setting the taskExecutor before faultTolerant() #4438
• Incorrect deprecation in MongoPagingItemReader #4552
• JobRepository.deleteJobInstance() Fails with Foreign Key Constraint Violation if Job Executions have Step Executions #4382
• DefaultJobParametersConverter throws java.lang.ArrayIndexOutOfBoundsException if input is empty string #4505

🚀 Enhancements

• Use Threadlocal.remove() instead of Threadlocal.set(null) #4601
• Performance issue in DefaultFieldSet due to the usage of SimpleDateFormat #1694
• Improve Error Messages in JobParametersBuilder methods #4581
• Implement jumpToItem in JsonItemReader #4557
• Maintain similar ordering of elements between DefaultStateTransitionComparator and FlowJobBuilder #4527
• Avoid collection copying #4553
• Make util classes to follow code style guide #4545
• Use annotation @Override consistently #4512
• Check dirty flag of step execution context before update in inner loop #4503

📔 Documentation

• Flow order priority does not match documented behavior #4456
• Incorrect link to batch reference documentation on project page #4637
• Typo in architecture doc #4607
• Grammatical error in restart.adoc #4600
• Incorrect link in appendix #4595
• Missing information about error handling in ChunkListeners #4384
• Improve Javadoc regarding the sort order in RepositoryItemReader #4462
• Fix code sample that uses deprecated StepBuilderFactory #4582
• Misleading documentation on ItemWriteListener #4400
• Incorrect code example in documentation #4550
• Reference Documentation Uses Deprecated Class StepExecutionListenerSupport #4538
• Incorrect Type of getter in Documentation for JobParameters#getDouble #4526
• UI Aligment Issue - Spring Batch Version Number in Docs #4534

🆙 Dependency Upgrades

• Spring Framework: 6.2.0-RC1
• Spring Retry: 2.0.9
• Micrometer: 1.14.0-M3
• Spring Integration: 6.4.0-M3
• Spring AMQP: 3.2.0-M3
• Spring Kafka: 3.3.0-M3
• Spring Data: 3.4.0-M1
• Spring Ldap: 3.2.6

🔨 Tasks

• Remove deprecated APIs scheduled for removal in v5.2.0 #4398
• Regression in javadocs deployment script #4511

❤️ Contributors

Many thanks to all contributors who worked on this release!

---

Full change log: v5.1.2...v5.2.0-M1

v5.1.2

🐞 Bug fixes

• Incorrect Chunk property value in implementation of ItemWriter write method #4560
• SystemCommandTasklet does not propagate errors #4483
• Remote partitioning doesn't work if you're using graalvm #4564
• SimpleBinaryBufferedReaderFactory misses line endings #811
• Memory leak in MessageChannelPartitionHandler when polling the database #4598

🚀 Enhancements

• Improve Error Messages in JobParametersBuilder methods #4581

📔 Documentation

• Reference Documentation Uses Deprecated Class StepExecutionListenerSupport #4538
• Incorrect code example in documentation #4550
• Misleading documentation on ItemWriteListener #4400
• Code sample uses deprecated StepBuilderFactory #4582
• Typo in java-config.adoc #4591
• Incorrect link in appendix #4595

🆙 Dependency Upgrades

• Spring Framework: 6.1.7
• Spring Retry: 2.0.6
• Micrometer: 1.12.6
• Spring Integration: 6.2.5
• Spring AMQP: 3.1.5
• Spring Kafka: 3.1.5
• Spring Data: 3.2.6
• Spring Ldap: 3.2.3

❤️ Contributors

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

---

Full change log: v5.1.1...v5.1.2

v5.0.6

🐞 Bug fixes

• Incorrect Chunk property value in implementation of ItemWriter write method #4560
• SystemCommandTasklet does not propagate errors #4483
• Remote partitioning doesn't work if you're using graalvm #4564
• SimpleBinaryBufferedReaderFactory misses line endings #811
• Memory leak in MessageChannelPartitionHandler when polling the database #4598

🚀 Enhancements

• Improve Error Messages in JobParametersBuilder methods #4581

📔 Documentation

• Reference Documentation Uses Deprecated Class StepExecutionListenerSupport #4538
• Incorrect code example in documentation #4550
• Misleading documentation on ItemWriteListener #4400
• Code sample uses deprecated StepBuilderFactory #4582
• Typo in java-config.adoc #4591

🆙 Dependency Upgrades

• Spring Framework: 6.0.20
• Spring Retry: 2.0.6
• Spring AMQP: 3.0.14
• Spring Kafka: 3.0.17

❤️ Contributors

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

---

Full change log: v5.0.5...v5.0.6

v5.1.1

⭐ New features

• Add JobRegistrySmartInitializingSingleton #4521

🐞 Bug fixes

• Incorrect error message in JobOperatorFactoryBean #4528
• DefaultJobParametersConverter throws java.lang.ArrayIndexOutOfBoundsException if input is empty string #4505
• JobRepository.deleteJobInstance() Fails with Foreign Key Constraint Violation if Job Executions have Step Executions #4382
• Incorrect step configuration when setting the taskExecutor before faultTolerant() #4438
• Incorrect deprecation in MongoPagingItemReader #4552

🚀 Enhancements

• Check dirty flag of step execution context before update in inner loop #4503

📔 Documentation

• Incorrect Type of getter in Documentation for JobParameters#getDouble #4526
• Broken link to Spring Batch docs #4498
• UI Aligment Issue - Spring Batch Version Number in Docs #4534

🆙 Dependency Upgrades

• Spring Framework: 6.1.4
• Spring Retry: 2.0.5
• Spring Integration: 6.2.2
• Spring Data: 3.2.3
• Spring AMQP: 3.1.2
• Spring Kafka: 3.1.2
• Micrometer: 1.12.3

❤️ Contributors

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

---

Full change log: v5.1.0...v5.1.1

v5.0.5

🐞 Bug fixes

• Incorrect error message in JobOperatorFactoryBean #4528
• DefaultJobParametersConverter throws java.lang.ArrayIndexOutOfBoundsException if input is empty string #4505
• JobRepository.deleteJobInstance() Fails with Foreign Key Constraint Violation if Job Executions have Step Executions #4382
• Incorrect step configuration when setting the taskExecutor before faultTolerant() #4438

🚀 Enhancements

• Check dirty flag of step execution context before update in inner loop #4503

📔 Documentation

• Incorrect Type of getter in Documentation for JobParameters#getDouble #4526

🆙 Dependency Upgrades

• Spring Framework: 6.0.17
• Spring Retry: 2.0.5
• Spring AMQP: 3.0.11
• Spring Kafka: 3.0.14

❤️ Contributors

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

---

Full change log: v5.0.4...v5.0.5

v5.1.0

⭐ 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

🚀 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

🐞 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

📔 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

🔨 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

🔨 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

❤️ 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

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Full change log: v5.0.3...v5.1.0

v5.0.4

🐞 Bug fixes

• Starting a flow with Flow#next makes the first step execute twice #4432
• 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

🚀 Enhancements

• Inaccurate exception message in SimpleJobRepository #4025
• Remove unnecessary expressions in AsyncItemWriter #4009

📔 Documentation

• Documentation unclear on how to replace deprecated AbstractTaskletStepBuilder#throttleLimit #4389
• Outdated Meta-data ERD #4358
• Incorrect JavaDoc for Methods returning JobFlowBuilder in JobBuilder #4415
• Incorrect Javadoc in DefaultFieldSet and DefaultFieldSetFactory #4494
• Update documentation about serializable keys in the execution context #4457

🆙 Dependency Upgrades

• Spring Framework: 6.0.14
• Spring Retry: 2.0.4
• Spring AMQP: 3.0.10
• Spring Data: 3.0.12
• Spring Integration: 6.0.9
• Spring Kafka: 3.0.13
• Spring LDAP: 3.0.6
• Micrometer: 1.10.13

❤️ Contributors

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

---

Full change log: v5.0.3...v5.0.4

v4.3.10

Important❗: This is the last OSS release of Spring Batch 4. Please refer to the support policy page for more details about our support policy.

🐞 Bug fixes

• NullPointerException in RepeatTemplate#doHandle() when unwrapIfRethrown() returns null if logging in DEBUG #1123
• Job scoped bean doesn't cleanup in unit test #1288

📔 Documentation

• Update documentation about serializable keys in the execution context #4457
• Incorrect JavaDoc for Methods returning JobFlowBuilder in JobBuilder #4415
• Incorrect Javadoc in DefaultFieldSet and DefaultFieldSetFactory #4494
• Regression with the CSS styles and JS toggle in the reference documentation of 4.3.x #4437

🔨 Tasks

• Upgrade to gradle 6.9.4
• Switch to spring-asciidoctor-backends for documentation

🔨 Dependency Upgrades

• Spring Framework: 5.3.31
• Spring Retry: 1.3.4
• Spring AMQP: 2.3.16
• Spring Data: 2.7.18
• Spring Integration: 5.5.20
• Spring Kafka: 2.9.13
• Spring LDAP: 2.4.1
• Micrometer: 1.9.17

❤️ Contributors

We would like to thank all contributors who helped in shipping this release!