我们的春季批处理需要2个步骤
Step1:从JMS发出Deque消息,然后处理该消息并将输出数据写入文件。步骤2:包含2个从属步骤的分区步骤。每个从属步骤对step1输出数据应用不同的算法。
问题:永远不会调用步骤2。试图将步骤侦听器附加到步骤1(以及编写器),但从未执行过。看来step1始终处于连续状态,因此step2(分区步骤)从未执行。
观察:当在步骤1中将JMSReader替换为普通(文件/ DB)阅读器时,控制转到步骤2
注意:需要firstQueueTemplate.setReceiveTimeout(Long.MAX_VALUE);因为我们需要连续不断地使消息一个接一个地出队。
public TransactionAwareConnectionFactoryProxy activeMQConnectionFactory() {
ActiveMQConnectionFactory amqConnectionFactory = new ActiveMQConnectionFactory(ActiveMQConnection.DEFAULT_BROKER_URL);
TransactionAwareConnectionFactoryProxy activeMQConnectionFactory = new TransactionAwareConnectionFactoryProxy(amqConnectionFactory);
return activeMQConnectionFactory;
}
@Bean
public ActiveMQQueue defaultQueue() {
return new ActiveMQQueue("batch-test");
}
@Bean
@DependsOn(value = { "activeMQConnectionFactory", "defaultQueue" })
public JmsTemplate firstQueueTemplate(ActiveMQQueue defaultQueue, TransactionAwareConnectionFactoryProxy activeMQConnectionFactory) {
JmsTemplate firstQueueTemplate = new JmsTemplate(activeMQConnectionFactory);
firstQueueTemplate.setDefaultDestination(defaultQueue);
firstQueueTemplate.setSessionTransacted(true);
firstQueueTemplate.setReceiveTimeout(Long.MAX_VALUE);
return firstQueueTemplate;
}
@Bean(name = "partitionerJob")
public Job partitionerJob() throws UnexpectedInputException, MalformedURLException, ParseException {
return jobs.get("partitionerJob")
.start(ingestionstep())
.next(partitionStep())
.build();
}
@Bean
public Step ingestionstep() throws UnexpectedInputException, MalformedURLException, ParseException {
System.out.println("ingestionstep forming");
return steps.get("ingsetionstep")
.<SPDRIngestScanBO, SPDRIngestScanBO>chunk(1)
.reader(jmsItemReader())
.processor(ingestionProcessor())
.writer(ingestionwriter() )
.listener(new StepExecutionListener() {
@Override
public void beforeStep(StepExecution stepExecution) {
// TODO Auto-generated method stub
}
@Override
public ExitStatus afterStep(StepExecution stepExecution) {
System.out.println("step exit status :"+stepExecution.getExitStatus());
return null;
}
})
// .listener(promotionListener())
.build();
}
@Bean
@StepScope
public Step partitionStep() throws UnexpectedInputException, MalformedURLException, ParseException {
System.out.println(" Inside partitionStep method ");
return steps.get("partitionStep")
.partitioner("partitionscans", partitioner(null))
.gridSize(2)
.step(scanStep())
.taskExecutor(taskExecutor())
.build();
}
@Bean
public JmsItemReader<SPDRIngestScanBO> jmsItemReader() {
JmsItemReader<SPDRIngestScanBO> jmsItemReader = new JmsItemReader<>();
jmsItemReader.setJmsTemplate(jmsTemplate);
jmsItemReader.setItemType(SPDRIngestScanBO.class);
return jmsItemReader;
}
@Bean
public SPDRIngestionStepProcessor ingestionProcessor() {
return new SPDRIngestionStepProcessor();
}
@Bean
public SPDRIngestionStepWriter ingestionwriter() {
return new SPDRIngestionStepWriter();
}
@Bean
@StepScope
public ModelsPartitioner partitioner(@Value("#{jobExecutionContext[models]}") List<SPDRScanModelBO> models) {
ModelsPartitioner partitioner = new ModelsPartitioner();
partitioner.setModels(models);
System.out.println("----partitioner----");
return partitioner;
}
@Bean
@StepScope
public Step scanStep() throws UnexpectedInputException, MalformedURLException, ParseException {
return steps.get("scanstep")
.<SPDRScanModelBO, SPDRScanResultBO>chunk(1)
.reader(scanStepReader(null))
.processor(scanStepProcessor())
.writer(scanStepWriter())
.build();
}
@Bean
@StepScope
public SPDRScanStepReader scanStepReader(@Value("#{stepExecutionContext[model]}") SPDRScanModelBO scanModelBO){
System.out.println("----scanStepReader----");
SPDRScanStepReader scanStepReader = new SPDRScanStepReader();
scanStepReader.setScanModelBO(scanModelBO);
return scanStepReader;
}
@Bean
@StepScope
public SPDRScanStepProcessor scanStepProcessor(){
SPDRScanStepProcessor scanStepProcessor = new SPDRScanStepProcessor();
return scanStepProcessor;
}
@Bean
@StepScope
public SPDRScanStepWriter scanStepWriter(){
SPDRScanStepWriter scanStepWriter = new SPDRScanStepWriter();
return scanStepWriter;
}
@Bean
@StepScope
public TaskExecutor taskExecutor() {
ThreadPoolTaskExecutor taskExecutor = new ThreadPoolTaskExecutor();
taskExecutor.setMaxPoolSize(2);
taskExecutor.setCorePoolSize(2);
taskExecutor.setQueueCapacity(2);
taskExecutor.afterPropertiesSet();
return taskExecutor;
}
```
在Spring Batch中,当您依次运行两个步骤时,先说步骤1,再说步骤2,然后仅当步骤1完成时才执行步骤2。
在您的情况下,step1从具有receiveTimeout = Long.MAX_VALUE
的jms队列中读取,因此,除非发生超时,否则step1将不会完成,因此step2将不会启动。