spring-batch

I've successfully set up a tutorial Spring Batch project. I'd really like to know if it's possible to make it multi-threaded at the "Spring level". The basic idea of what I want is to make a list of tasks or task steps and let them be picked up and worked on by independent threads, ideally out of a pool limited to 'n' number of threads. Is this possible? If so, how? Could someone show guide me to that point from where I'm currently at? The simple project I have is from this tutorial here . It basically has different tasks which print out a message to the screen. Here's my current simpleJob.xml

I'm using Spring Batch version 2.2.4.RELEASE I tried to write a simple example with stateful ItemReader, ItemProcessor and ItemWriter beans. public class StatefulItemReader implements ItemReader<String> { private List<String> list; @BeforeStep public void initializeState(StepExecution stepExecution) { this.list = new ArrayList<>(); } @AfterStep public ExitStatus exploitState(StepExecution stepExecution) { System.out.println("******************************"); System.out.println(" READING RESULTS : " + list.size()); return stepExecution.getExitStatus(); } @Override public String read() throws

I have a requirement in which a tasklet, stores all the files in the directories in an arraylist. The size of the list is stored in the job execution context. Later this count is accessed from another tasklet in another step. How do it do this. I tried to store in jobexecution context, at runtime throws unmodifiable collection exception, public RepeatStatus execute(StepContribution arg0, ChunkContext arg1) throws Exception { StepContext stepContext = arg1.getStepContext(); StepExecution stepExecution = stepContext.getStepExecution(); JobExecution jobExecution = stepExecution.getJobExecution();

I'm testing Spring Batch using Spring boot. My need is to define jobs working on an Oracle Database but I don't want to save jobs and steps states inside this DB. I've read in the documentation I can use a in-memory repository with the MapJobRepositoryFactoryBean. Then, I've implemented this bean: @Bean public JobRepository jobRepository() { MapJobRepositoryFactoryBean factoryBean = new MapJobRepositoryFactoryBean(new ResourcelessTransactionManager()); try { JobRepository jobRepository = factoryBean.getObject(); return jobRepository; } catch (Exception e) { e.printStackTrace(); return null; }

I am getting this exception with SERIALIZED isolation level on JobRepository in Spring Batch: org.springframework.dao.CannotSerializeTransactionException: PreparedStatementCallback; SQL [INSERT into DATAFEED_APP.BATCH_JOB_INSTANCE(JOB_INSTANCE_ID, JOB_NAME, JOB_KEY, VERSION) values (?, ?, ?, ?)]; ORA-08177: can't serialize access for this transaction ; nested exception is java.sql.SQLException: ORA-08177: can't serialize access for this transaction at org.springframework.jdbc.support.SQLErrorCodeSQLExceptionTranslator.doTranslate(SQLErrorCodeSQLExceptionTranslator.java:269) at org

What is the difference between spring batch remote chunking and remote partitioning? I can not understand the difference between remote chunking and remote partitioning in spring batch. Could anybody please explain? Remote Partitioning Partitioning is a master/slave step configuration that allows for partitions of data to be processed in parallel. Each partition is described via some metadata. For example, if you were processing a database table, partition 1 may be ids 0-100, partition 2 being 101-200, etc. For Spring Batch, a master step uses a Partitioner to generate ExecutionContexts that

Situation I am using Spring Batch to build an Accumulative Snapshot for our Data Warehouse and I am having a configuration roadblock that I cannot figure out. I have created a Simple Spring Batch Project with STS (SpringSource Tool Suite 2.8.1) using the Spring Template Project . These were my two xml configuration files created: launch-context.xml <?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:batch="http://www.springframework.org/schema/batch" xmlns:context="http://www