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
24 lines
1.8 KiB
Plaintext
24 lines
1.8 KiB
Plaintext
# Run 1: the poisoned duplicate at row 47 fails the whole chunk
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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
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2026-09-13T06:23:09.122Z INFO 5302 --- [ main] o.s.batch.core.step.AbstractStep : Executing step: [importStep]
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2026-09-13T06:23:09.162Z WARN 5302 --- [ main] c.a.b.p.ProductValidatingProcessor : filtering abc-0012: does not match ^[A-Z]{3}-\d{4}$
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2026-09-13T06:23:09.176Z WARN 5302 --- [ main] c.a.b.p.ProductValidatingProcessor : filtering ABC-0033: priceCents must be positive, was 0
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org.springframework.dao.DuplicateKeyException: PreparedStatementCallback; SQL [INSERT INTO PRODUCT (sku, name, price_cents) VALUES (?, ?, ?)]; Unique index or primary key violation: "PUBLIC.CONSTRAINT_18 INDEX PUBLIC.CONSTRAINT_INDEX_1 ON PUBLIC.PRODUCT(SKU NULLS FIRST) VALUES ( /* 5 */ 'ABC-0005' )"; SQL statement:
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Caused by: org.springframework.dao.DuplicateKeyException: PreparedStatementCallback; SQL [INSERT INTO PRODUCT (sku, name, price_cents) VALUES (?, ?, ?)]; Unique index or primary key violation: "PUBLIC.CONSTRAINT_18 INDEX PUBLIC.CONSTRAINT_INDEX_1 ON PUBLIC.PRODUCT(SKU NULLS FIRST) VALUES ( /* 5 */ 'ABC-0005' )"; SQL statement:
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2026-09-13T06:23:09.205Z INFO 5302 --- [ main] o.s.batch.core.step.AbstractStep : Step: [importStep] executed in 85ms
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JOB FINISHED: status=FAILED exitCode=FAILED
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$ SELECT status, read_count, filter_count, write_count, commit_count, rollback_count FROM BATCH_STEP_EXECUTION;
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STATUS | READ_COUNT | FILTER_COUNT | WRITE_COUNT | COMMIT_COUNT | ROLLBACK_COUNT
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FAILED | 50 | 2 | 38 | 4 | 1
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(1 row, 21 ms)
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$ SELECT COUNT(*) FROM PRODUCT;
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COUNT(*)
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38
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(1 row, 20 ms)
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