private SimpleJob importProductsJob() throws Exception {
// Create Job
SimpleJob bean = new SimpleJob();
bean.setName("importProductsJob");
bean.setJobRepository(jobRepository);
bean.afterPropertiesSet();
// Create Steps
List<Step> steps = new ArrayList<Step>();
// Create Tasklet Step
TaskletStep step = new TaskletStep();
step.setName("importProducts");
step.setTransactionManager(transactionManager);
step.setJobRepository(jobRepository);
step.setStartLimit(100);
// Create repeat template for Chunk Size
RepeatTemplate repeatTemplate = new TaskExecutorRepeatTemplate();
repeatTemplate.setCompletionPolicy(new SimpleCompletionPolicy(5));
// TaskletStep <- RepeatTemplate
step.setStepOperations(repeatTemplate);
// Create Chunk Tasklet with Provider (reader) and Chunk Processor
// Tasklet <- ChunkProvider <- ItemReader, RepeatTemplate
// Tasklet <- ChunkProcessor <- ItemProcessor, ItemWriter
ChunkOrientedTasklet<Product> tasklet =
new ChunkOrientedTasklet<Product>(
new SimpleChunkProvider<Product>(productReader(), repeatTemplate),
new SimpleChunkProcessor<Product, Product>(
new PassThroughItemProcessor<Product>(), new ProductItemLoggerWriter()));
// Job <- Steps <- TaskletStep <- Tasklet
step.setTasklet(tasklet);
// Job <- Steps <- TaskletStep
steps.add(step);
// Job <- Steps
bean.setSteps(steps);
return bean;
}
/** @return fully configured retry template for item processing phase. */
private BatchRetryTemplate createRetryOperations() {
RetryPolicy retryPolicy = this.retryPolicy;
SimpleRetryPolicy simpleRetryPolicy = null;
Map<Class<? extends Throwable>, Boolean> map =
new HashMap<Class<? extends Throwable>, Boolean>(retryableExceptionClasses);
map.put(ForceRollbackForWriteSkipException.class, true);
simpleRetryPolicy = new SimpleRetryPolicy(retryLimit, map);
if (retryPolicy == null) {
Assert.state(
!(retryableExceptionClasses.isEmpty() && retryLimit > 0),
"If a retry limit is provided then retryable exceptions must also be specified");
retryPolicy = simpleRetryPolicy;
} else if ((!retryableExceptionClasses.isEmpty() && retryLimit > 0)) {
CompositeRetryPolicy compositeRetryPolicy = new CompositeRetryPolicy();
compositeRetryPolicy.setPolicies(new RetryPolicy[] {retryPolicy, simpleRetryPolicy});
retryPolicy = compositeRetryPolicy;
}
RetryPolicy retryPolicyWrapper = getFatalExceptionAwareProxy(retryPolicy);
BatchRetryTemplate batchRetryTemplate = new BatchRetryTemplate();
if (backOffPolicy != null) {
batchRetryTemplate.setBackOffPolicy(backOffPolicy);
}
batchRetryTemplate.setRetryPolicy(retryPolicyWrapper);
// Co-ordinate the retry policy with the exception handler:
RepeatOperations stepOperations = getStepOperations();
if (stepOperations instanceof RepeatTemplate) {
SimpleRetryExceptionHandler exceptionHandler =
new SimpleRetryExceptionHandler(
retryPolicyWrapper, getExceptionHandler(), nonRetryableExceptionClasses);
((RepeatTemplate) stepOperations).setExceptionHandler(exceptionHandler);
}
if (retryContextCache != null) {
batchRetryTemplate.setRetryContextCache(retryContextCache);
}
if (retryListeners != null) {
batchRetryTemplate.setListeners(retryListeners.toArray(new RetryListener[0]));
}
return batchRetryTemplate;
}
/**
* Build the step from the components collected by the fluent setters. Delegates first to {@link
* #enhance(Step)} and then to {@link #createTasklet()} in subclasses to create the actual
* tasklet.
*
* @return a tasklet step fully configured and read to execute
*/
public TaskletStep build() {
registerStepListenerAsChunkListener();
TaskletStep step = new TaskletStep(getName());
super.enhance(step);
step.setChunkListeners(chunkListeners.toArray(new ChunkListener[0]));
if (transactionAttribute != null) {
step.setTransactionAttribute(transactionAttribute);
}
if (stepOperations == null) {
stepOperations = new RepeatTemplate();
if (taskExecutor != null) {
TaskExecutorRepeatTemplate repeatTemplate = new TaskExecutorRepeatTemplate();
repeatTemplate.setTaskExecutor(taskExecutor);
repeatTemplate.setThrottleLimit(throttleLimit);
stepOperations = repeatTemplate;
}
((RepeatTemplate) stepOperations).setExceptionHandler(exceptionHandler);
}
step.setStepOperations(stepOperations);
step.setTasklet(createTasklet());
step.setStreams(streams.toArray(new ItemStream[0]));
try {
step.afterPropertiesSet();
} catch (Exception e) {
throw new StepBuilderException(e);
}
return step;
}
private RepeatOperations createRepeatOperations() {
RepeatTemplate repeatOperations = new RepeatTemplate();
repeatOperations.setCompletionPolicy(getChunkCompletionPolicy());
repeatOperations.setExceptionHandler(getExceptionHandler());
return repeatOperations;
}