22 October 2020

#Spring_Batch

#Spring_Batch

Key Concepts


S.No Topic Sub-Topics
1Introduction to Spring BatchWhat is Spring Batch, Batch vs Real-time, Architecture Overview, Use Cases, Chunk Processing
2Spring Batch ArchitectureJob, Step, ItemReader, ItemProcessor, ItemWriter
3Spring Batch TerminologyJob Instance, Job Execution, Step Execution, Job Parameters, Execution Context
4Setup ProjectMaven Dependencies, Spring Boot Starter Batch, Configuration Files, Annotations, EnableBatchProcessing
5Job ConfigurationJobBuilderFactory, Flow Execution, Deciders, Job Parameters, Listeners
6Step ConfigurationStepBuilderFactory, Tasklet Step, Chunk Step, Commit Interval, Skip Retry
7ItemReader OverviewFlatFileItemReader, JdbcCursorReader, JpaPagingItemReader, XML Reader, JSON Reader
8ItemProcessor OverviewTransformations, Validation, Filtering, Exception Handling, Composite Processor
9ItemWriter OverviewFlatFileWriter, JdbcBatchItemWriter, JpaItemWriter, Custom Writer, Transaction Handling
10Chunk Oriented ProcessingChunk Size, Read Process Write, Rollback, Transactions, Error Handling
11Tasklet ModelWhat is Tasklet, Custom Tasklet, Repeat Status, Step Scope, Simple Job
12Spring Batch DatabaseDataSource Config, JobRepository Schema, Meta Tables, Transaction Manager, Persisting State
13Spring Batch CSVRead CSV File, Tokenizer, FlatFileReader, FlatFileWriter, Multi-line CSV
14Spring Batch XMLXML Reader, StAX Reader, Marshaller, XStream, XML to POJO
15Spring Batch JSONJSON Reader, Jackson Processor, JSON Writer, Custom Mapper, File Writing
16Spring Batch RESTREST Reader, WebClient, Retry, Timeout, Throttling
17Exception HandlingSkip Policy, Retry Policy, Listener, Fatal Exception, Restartability
18Job ParametersJobParameters, JobInstance, Incrementer, Parameter Types, Parameter Validation
19Flow and DecisionFlowBuilder, Split Flow, Decision Step, JobExecutionDecider, Transitions
20Spring Batch ListenersJobExecutionListener, StepListener, ItemProcessListener, ChunkListener, Logging
21Partitioning and ScalingRemote Chunking, PartitionHandler, GridPartitioner, Multi-thread Step, Parallel Steps
22Spring Batch KafkaKafka Reader, Message Listener, Kafka Writer, JSON Events, Stream Processing
23Spring Batch CloudSpring Cloud Task, Cloud Deployer, Kubernetes Batch, Cloud Scheduler, Cloud Deployment
24Monitoring and MetricsBatch UI, Actuator Metrics, Job Status, Prometheus, Alerting
25Spring Batch TestingJobTestUtils, Slice Test, Mock Reader, Mock Processor, Step Execution Test
26Performance OptimizationChunk Size, Paging Reader, Batch Writing, Indexes, Parallelism
27Metadata Tables Deep DiveJob Instance Table, Job Execution Table, Step Execution Table, Job Params Table, Execution Context Table
28Deployment StrategyJar Deployment, Cron Trigger, Spring Scheduler, Docker Build, Cloud Run
29Real Time ProjectETL Pipeline, CSV to DB, Data Validation, Audit Logging, Notification
30Interview PreparationCommon Questions, Architecture Diagrams, Use Cases, Scalability, Failure Recovery

Interview question

Basic

  1. What is Spring Batch?
  2. What are the main components of Spring Batch?
  3. Explain the difference between a Job and a Step.
  4. What is a JobInstance in Spring Batch?
  5. What is JobExecution?
  6. What is StepExecution?
  7. What is the purpose of JobRepository?
  8. What is JobLauncher?
  9. Explain JobParameters in Spring Batch.
  10. What is a Tasklet in Spring Batch?
  11. What is Chunk-oriented processing?
  12. What is the difference between Tasklet and Chunk processing?
  13. What are ItemReader, ItemProcessor, and ItemWriter?
  14. Name some commonly used ItemReader implementations.
  15. Name some commonly used ItemWriter implementations.
  16. Explain the use of ItemProcessor.
  17. How do you configure a Spring Batch job using XML?
  18. How do you configure a Spring Batch job using Java Config?
  19. What is JobExecutionListener?
  20. What is StepExecutionListener?
  21. What is a JobParametersIncrementer?
  22. Explain the difference between stateful and stateless steps.
  23. How do you restart a failed job?
  24. How do you handle simple errors in Spring Batch?
  25. What is Spring Batch Admin?

Intermediate

  1. How does Spring Batch handle transactions?
  2. What is a SkipPolicy?
  3. What is a RetryPolicy?
  4. How do you configure chunk size in Spring Batch?
  5. Explain the difference between synchronous and asynchronous processing in Spring Batch.
  6. How do you implement a custom ItemReader?
  7. How do you implement a custom ItemWriter?
  8. What is CompositeItemProcessor?
  9. Explain the use of JdbcCursorItemReader.
  10. Explain the use of FlatFileItemReader.
  11. What is JpaPagingItemReader?
  12. How do you implement multi-threaded steps?
  13. How do you implement job partitioning?
  14. Explain remote chunking.
  15. How do you handle exceptions in chunk processing?
  16. How do you skip records in case of errors?
  17. How do you configure a Step to be restartable?
  18. How do you monitor job execution in Spring Batch?
  19. What is JobOperator?
  20. What is JobExplorer?
  21. How do you test a Spring Batch step?
  22. How do you test a Spring Batch job?
  23. Explain the use of JobLauncherTestUtils.
  24. How do you integrate Spring Batch with Spring Boot?
  25. What are the key features of Spring Batch Auto-configuration?

Advanced

  1. Explain conditional job flow in Spring Batch.
  2. Explain split flow in Spring Batch.
  3. How do you handle parallel job execution?
  4. How do you implement asynchronous ItemProcessor and ItemWriter?
  5. How do you implement custom retry logic?
  6. How do you implement custom skip logic?
  7. How do you implement job listeners for custom behavior?
  8. How do you implement step listeners for custom behavior?
  9. How do you use ExecutionContext to store data?
  10. Explain the difference between JobExecutionContext and StepExecutionContext.
  11. How do you handle large data sets efficiently?
  12. How do you configure paging for database readers?
  13. Explain the use of JobParametersValidator.
  14. How do you implement a multi-step workflow with conditional logic?
  15. How do you implement job hierarchy and nested jobs?
  16. Explain the use of JobRegistry.
  17. How do you schedule Spring Batch jobs with Quartz?
  18. How do you secure batch jobs?
  19. How do you implement batch job notifications?
  20. Explain how to tune Spring Batch for performance.
  21. How do you monitor long-running batch jobs?
  22. Explain job and step scope beans.
  23. How do you handle late data in batch jobs?
  24. How do you integrate Spring Batch with messaging systems (like Kafka)?
  25. How do you implement partitioned steps with remote workers?

Expert

  1. How do you implement distributed Spring Batch processing?
  2. How do you implement parallel job execution across multiple nodes?
  3. How do you implement dynamic job creation at runtime?
  4. Explain the internal architecture of Spring Batch.
  5. How does Spring Batch ensure data consistency and fault tolerance?
  6. How do you implement checkpointing in batch processing?
  7. Explain restartability and idempotency in batch jobs.
  8. How do you debug complex batch job failures?
  9. How do you handle transactional integrity across multiple steps?
  10. How do you optimize memory usage in large batch jobs?
  11. How do you integrate Spring Batch with cloud services (AWS, Azure)?
  12. How do you implement dynamic partitioning at runtime?
  13. How do you implement conditional skip and retry policies together?
  14. How do you implement composite steps and flows?
  15. How do you extend Spring Batch with custom extensions?
  16. How do you implement a monitoring dashboard for batch jobs?
  17. How do you implement event-driven batch processing?
  18. How do you handle cross-job communication?
  19. How do you implement custom job metrics and reporting?
  20. How do you integrate Spring Batch with Spring Cloud Data Flow?
  21. How do you implement versioning and migration of batch jobs?
  22. How do you implement high availability in Spring Batch?
  23. How do you implement job throttling and load balancing?
  24. How do you migrate legacy batch jobs to Spring Batch?
  25. What are best practices for enterprise-grade Spring Batch architecture?

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