Claude
b81af72bc3
Companion code for "Spring Batch on Boot 4.1: Jobs, Steps, Chunk Processing and Restartability". A productImportJob configured three ways by profile against a poisoned CSV row, run as real java -jar processes (not just JUnit) so the restart story is genuine: a chunk fails and rolls back, the process exits, a brand-new JVM against the same file-based H2 database resumes at the exact next unread row (READ_COUNT 20, not 60) and completes. Findings the build pins: - StepBuilder.chunk(int, PlatformTransactionManager) still compiles in Batch 6.0.5 but returns the legacy SimpleStepBuilder; chunk(int) returns the new ChunkOrientedStepBuilder, and only the latter is used here. - Two different ExecutionContext classes now exist in two different packages (infrastructure.item vs core.repository.persistence) with different shapes. - spring-boot-starter-batch alone gives a resourceless JobRepository that forgets every JobInstance the moment the JVM exits; spring-boot-starter- batch-jdbc is what makes the restart demo possible at all, demonstrated by excluding BatchJdbcAutoConfiguration and watching a "restart" collide with the previous run's own data instead of resuming it. - A migration-guide summary claiming CommandLineJobRunner was removed in 6.0 is wrong -- javap against the real jar shows @Deprecated(forRemoval=true), not removed. - RepeatStatus moved from core.repeat to infrastructure.repeat, caught by the compiler rather than by reading docs. 11 documentation chapters, 10 captured transcripts (unit tests, javap output, and real two-JVM scenario runs), all regenerated by scripts/run-all.sh. Fixed after push: three dead docs.spring.io links in the doc chapters (readersAndWriters/* and chunk-oriented-processing/*.html paths moved when Spring Batch 6 reorganized its reference docs; corrected to the current readers-and-writers/*, processor.html and chunk-oriented-processing.html paths, verified 200 via curl before committing). Co-Authored-By: Claude Sonnet 5 <[email protected]> Claude-Session: https://claude.ai/code/session_019DXsJ1zpikbA1MQJN6RqFA
26 lines
1.5 KiB
Plaintext
26 lines
1.5 KiB
Plaintext
# Run 2: a brand-new JVM, the SAME job parameters, the corrected file
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sed -i '48s/ABC-0005/ABC-0999/' scenario-data/restart-demo/input.csv # the only change
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$ java -jar target/spring-batch-1.0.0.jar --spring.profiles.active=broken \
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--import.file=file:scenario-data/restart-demo/input.csv \
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--spring.datasource.url=jdbc:h2:file:.../scenario-data/restart-demo/db # same db file
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2026-09-13T06:23:13.205Z INFO 5386 --- [ main] o.s.batch.core.step.AbstractStep : Executing step: [importStep]
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2026-09-13T06:23:13.232Z INFO 5386 --- [ main] o.s.batch.core.step.AbstractStep : Step: [importStep] executed in 28ms
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2026-09-13T06:23:13.240Z INFO 5386 --- [ main] o.s.batch.core.step.AbstractStep : Executing step: [reportStep]
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REPORT: 58 products now in the PRODUCT table
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2026-09-13T06:23:13.246Z INFO 5386 --- [ main] o.s.batch.core.step.AbstractStep : Step: [reportStep] executed in 6ms
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JOB FINISHED: status=COMPLETED exitCode=COMPLETED
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$ SELECT step_execution_id, job_execution_id, status, read_count, write_count, commit_count, rollback_count FROM BATCH_STEP_EXECUTION ORDER BY step_execution_id;
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STEP_EXECUTION_ID | JOB_EXECUTION_ID | STATUS | READ_COUNT | WRITE_COUNT | COMMIT_COUNT | ROLLBACK_COUNT
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1 | 1 | FAILED | 50 | 38 | 4 | 1
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2 | 2 | COMPLETED | 20 | 20 | 2 | 0
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(2 rows, 22 ms)
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$ SELECT COUNT(*) FROM PRODUCT;
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COUNT(*)
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58
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(1 row, 19 ms)
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