Examples of org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor

Package org.springframework.scheduling.concurrent

Examples of org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor

org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor
JavaBean that allows for configuring a JDK 1.5 {@link java.util.concurrent.ThreadPoolExecutor}in bean style (through its "corePoolSize", "maxPoolSize", "keepAliveSeconds", "queueCapacity" properties), exposing it as a Spring {@link org.springframework.core.task.TaskExecutor}. This is an alternative to configuring a ThreadPoolExecutor instance directly using constructor injection, with a separate {@link ConcurrentTaskExecutor} adapter wrapping it.
For any custom needs, in particular for defining a {@link java.util.concurrent.ScheduledThreadPoolExecutor}, it is recommended to use a straight definition of the Executor instance or a factory method definition that points to the JDK 1.5 {@link java.util.concurrent.Executors} class.To expose such a raw Executor as a Spring {@link org.springframework.core.task.TaskExecutor}, simply wrap it with a {@link ConcurrentTaskExecutor} adapter.
NOTE: This class implements Spring's {@link org.springframework.core.task.TaskExecutor} interface as well as the JDK 1.5{@link java.util.concurrent.Executor} interface, with the former being the primaryinterface, the other just serving as secondary convenience. For this reason, the exception handling follows the TaskExecutor contract rather than the Executor contract, in particular regarding the {@link org.springframework.core.task.TaskRejectedException}. @author Juergen Hoeller @since 2.0 @see org.springframework.core.task.TaskExecutor @see java.util.concurrent.Executor @see java.util.concurrent.ThreadPoolExecutor @see java.util.concurrent.ScheduledThreadPoolExecutor @see java.util.concurrent.Executors @see ConcurrentTaskExecutor

    System.out.println("file poller isRunning before start: " + filePoller.isRunning());
    controlChannel.send(MessageBuilder.withPayload("@filePoller.start()").build());
    System.out.println("file poller isRunning after start:  " + filePoller.isRunning());
    controlChannel.send(MessageBuilder.withPayload("@filePoller.stop()").build());
    System.out.println("file poller isRunning after stop:   " + filePoller.isRunning());
    ThreadPoolTaskExecutor executor = context.getBean("myExecutor", ThreadPoolTaskExecutor.class);
    System.out.println("max pool size before update: " + executor.getMaxPoolSize());
    controlChannel.send(MessageBuilder.withPayload("@myExecutor.setMaxPoolSize(25)").build());
    System.out.println("max pool size after update:  " + executor.getMaxPoolSize());
  }

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  public void testWithExecutor() throws Exception {
    CachingConnectionFactory connectionFactory = beanFactory.getBean("withExecutor", CachingConnectionFactory.class);
    assertNotNull(connectionFactory);
    Object executor = new DirectFieldAccessor(connectionFactory).getPropertyValue("executorService");
    assertNotNull(executor);
    ThreadPoolTaskExecutor exec = beanFactory.getBean("exec", ThreadPoolTaskExecutor.class);
    assertSame(exec.getThreadPoolExecutor(), executor);
    DirectFieldAccessor dfa = new DirectFieldAccessor(connectionFactory);
    assertEquals(Boolean.FALSE, dfa.getPropertyValue("publisherConfirms"));
    assertEquals(Boolean.FALSE, dfa.getPropertyValue("publisherReturns"));
    assertEquals(CachingConnectionFactory.CacheMode.CONNECTION, connectionFactory.getCacheMode());
    assertEquals(0,  TestUtils.getPropertyValue(connectionFactory, "rabbitConnectionFactory.connectionTimeout"));

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  @Test
  public void testAtomicSendAndReceiveExternalExecutor() throws Exception {
    final CachingConnectionFactory connectionFactory = new CachingConnectionFactory();
    connectionFactory.setHost("localhost");
    ThreadPoolTaskExecutor exec = new ThreadPoolTaskExecutor();
    final String execName = "make-sure-exec-passed-in";
    exec.setBeanName(execName);
    exec.afterPropertiesSet();
    connectionFactory.setExecutor(exec);
    final Field[] fields = new Field[1];
    ReflectionUtils.doWithFields(RabbitTemplate.class, new FieldCallback() {
      @Override
      public void doWith(Field field) throws IllegalArgumentException,

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  private int threadPoolSize = 10;


  @Bean
  public EngineRunner engineRunner()
  {
    ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
    executor.setCorePoolSize(threadPoolSize);
    executor.setMaxPoolSize(threadPoolSize);
    executor.setQueueCapacity(0);
    executor.initialize();


    ThreadPoolEngineRunner runner = new ThreadPoolEngineRunner();
    runner.setIdleTime(idleTime);
    runner.setFetchSize(threadPoolSize);
    runner.setExecutor(executor);

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  protected void setThreadPoolSize(int n)
  {
    getProcessServer().getEngineRunner().setFetchSize(n);
    if (getProcessServer().getEngineRunner() instanceof ThreadPoolEngineRunner)
    {
      ThreadPoolTaskExecutor executor = ((ThreadPoolEngineRunner) getProcessServer().getEngineRunner())
        .getExecutor();
      executor.setCorePoolSize(n);
      executor.setMaxPoolSize(n);
      executor.setQueueCapacity(0);
      executor.initialize();
    }
  }

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