Examples of org.springframework.core.task.SimpleAsyncTaskExecutor

org.springframework.core.task.SimpleAsyncTaskExecutor
{@link TaskExecutor} implementation that fires up a new Thread for each task,executing it asynchronously.
Supports limiting concurrent threads through the "concurrencyLimit" bean property. By default, the number of concurrent threads is unlimited.
NOTE: This implementation does not reuse threads! Consider a thread-pooling TaskExecutor implementation instead, in particular for executing a large number of short-lived tasks. @author Juergen Hoeller @since 2.0 @see #setConcurrencyLimit @see SyncTaskExecutor @see org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor @see org.springframework.scheduling.commonj.WorkManagerTaskExecutor

  @Test
  public void testMultithreadedSkipInWriter() throws Exception {
    writer.setFailures("1", "2", "3", "4", "5");
    factory.setCommitInterval(3);
    factory.setSkipLimit(10);
    factory.setTaskExecutor(new SimpleAsyncTaskExecutor());


    Step step = factory.getObject();


    step.execute(stepExecution);
    assertEquals(BatchStatus.COMPLETED, stepExecution.getStatus());

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  int count = 0;


  // @Override
  public RepeatTemplate getRepeatTemplate() {
    TaskExecutorRepeatTemplate template = new TaskExecutorRepeatTemplate();
    template.setTaskExecutor(new SimpleAsyncTaskExecutor());
    // Set default completion above number of items in input file
    template.setCompletionPolicy(new SimpleCompletionPolicy(8));
    return template;
  }

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  @Test
  public void testEarlyCompletionWithException() throws Exception {


    TaskExecutorRepeatTemplate template = new TaskExecutorRepeatTemplate();
    SimpleAsyncTaskExecutor taskExecutor = new SimpleAsyncTaskExecutor();
    template.setCompletionPolicy(new SimpleCompletionPolicy(20));
    taskExecutor.setConcurrencyLimit(2);
    template.setTaskExecutor(taskExecutor);
    try {
      template.iterate(new RepeatCallback() {
                @Override
        public RepeatStatus doInIteration(RepeatContext context) throws Exception {

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  @Test
  public void testExceptionHandlerSwallowsException() throws Exception {


    TaskExecutorRepeatTemplate template = new TaskExecutorRepeatTemplate();
    SimpleAsyncTaskExecutor taskExecutor = new SimpleAsyncTaskExecutor();
    template.setCompletionPolicy(new SimpleCompletionPolicy(4));
    taskExecutor.setConcurrencyLimit(2);
    template.setTaskExecutor(taskExecutor);


    template.setExceptionHandler(new ExceptionHandler() {
            @Override
      public void handleException(RepeatContext context, Throwable throwable) throws Throwable {

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  public void testThrottleLimit() throws Exception {


    int throttleLimit = 600;


    TaskExecutorRepeatTemplate template = new TaskExecutorRepeatTemplate();
    SimpleAsyncTaskExecutor taskExecutor = new SimpleAsyncTaskExecutor();
    taskExecutor.setConcurrencyLimit(300);
    template.setTaskExecutor(taskExecutor);
    template.setThrottleLimit(throttleLimit);


    final String threadName = Thread.currentThread().getName();
    final Set<String> threadNames = new HashSet<String>();

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   */
  @Test
  public void testSingleThreadAsynchronousExecution() throws Exception {
    TaskExecutorRepeatTemplate jobTemplate = new TaskExecutorRepeatTemplate();
    final RepeatTemplate stepTemplate = new RepeatTemplate();
    SimpleAsyncTaskExecutor taskExecutor = new SimpleAsyncTaskExecutor();
    taskExecutor.setConcurrencyLimit(2);
    jobTemplate.setTaskExecutor(taskExecutor);


    final String threadName = Thread.currentThread().getName();
    final Set<String> threadNames = new HashSet<String>();

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  @Before
  public void setUp() {


    template = new TaskExecutorRepeatTemplate();
    TaskExecutor taskExecutor = new SimpleAsyncTaskExecutor();
    threadPool.setMaxPoolSize(300);
    threadPool.setCorePoolSize(10);
    threadPool.setQueueCapacity(0);
    threadPool.afterPropertiesSet();
    taskExecutor = threadPool;

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  @Test
  public void testThrottleLimitEarlyFinishOneThread() throws Exception {


    early = 4;
    SimpleAsyncTaskExecutor taskExecutor = new SimpleAsyncTaskExecutor();
    taskExecutor.setConcurrencyLimit(1);


    // This is kind of slow with only one thread, so reduce size:
    throttleLimit = 10;
    total = 20;

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        listenerContainer.setMaxConcurrentConsumers(maxConcurrency);
      }
    }
    listenerContainer.setPrefetchCount(properties.getPrefetchCount(this.defaultPrefetchCount));
    listenerContainer.setTxSize(properties.getTxSize(this.defaultTxSize));
    listenerContainer.setTaskExecutor(new SimpleAsyncTaskExecutor(queue.getName() + "-"));
    listenerContainer.setQueues(queue);
    int maxAttempts = properties.getMaxAttempts(this.defaultMaxAttempts);
    if (maxAttempts > 1) {
      RetryOperationsInterceptor retryInterceptor = RetryInterceptorBuilder.stateless()
          .maxAttempts(maxAttempts)

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            return new RestTemplate();
        }


        @Bean
        public TaskExecutor taskExecutor() {
            return new SimpleAsyncTaskExecutor();
        }

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