Examples of org.springframework.retry.support.RetryTemplate

Package org.springframework.retry.support

Examples of org.springframework.retry.support.RetryTemplate

org.springframework.retry.support.RetryTemplate
Template class that simplifies the execution of operations with retry semantics.
Retryable operations are encapsulated in implementations of the {@link RetryCallback}interface and are executed using one of the supplied execute methods.
By default, an operation is retried if is throws any {@link Exception} or subclass of{@link Exception}. This behaviour can be changed by using the {@link #setRetryPolicy(RetryPolicy)} method.
Also by default, each operation is retried for a maximum of three attempts with no back off in between. This behaviour can be configured using the {@link #setRetryPolicy(RetryPolicy)} and {@link #setBackOffPolicy(BackOffPolicy)}properties. The {@link org.springframework.retry.backoff.BackOffPolicy} controls howlong the pause is between each individual retry attempt.
This class is thread-safe and suitable for concurrent access when executing operations and when performing configuration changes. As such, it is possible to change the number of retries on the fly, as well as the {@link BackOffPolicy} used and no in progressretryable operations will be affected. @author Rob Harrop @author Dave Syer @author Gary Russell @author Artem Bilan

        /**
         * Do not have Spring AMQP re-try messages upon failure, leave it to Camel
         * @return An advice chain populated with a NeverRetryPolicy
         */
        public final Advice[] getAdviceChain() {
            RetryTemplate retryRule = new RetryTemplate();
            retryRule.setRetryPolicy(new NeverRetryPolicy());
            
            StatefulRetryOperationsInterceptorFactoryBean retryOperation = new StatefulRetryOperationsInterceptorFactoryBean();
            retryOperation.setRetryOperations(retryRule);
            retryOperation.setMessageKeyGeneretor(new DefaultKeyGenerator());

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        /**
         * Do not have Spring AMQP re-try messages upon failure, leave it to Camel
         * @return An advice chain populated with a NeverRetryPolicy
         */
        public final Advice[] getAdviceChain() {
            RetryTemplate retryRule = new RetryTemplate();
            retryRule.setRetryPolicy(new NeverRetryPolicy());
            
            StatefulRetryOperationsInterceptorFactoryBean retryOperation = new StatefulRetryOperationsInterceptorFactoryBean();
            retryOperation.setRetryOperations(retryRule);
            retryOperation.setMessageKeyGeneretor(new DefaultKeyGenerator());

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    assertEquals(2, count);
  }


  @Test
  public void testDefaultInterceptorWithRecovery() throws Exception {
    RetryTemplate template = new RetryTemplate();
    template.setRetryPolicy(new SimpleRetryPolicy(1, Collections
        .<Class<? extends Throwable>, Boolean> singletonMap(Exception.class, true)));
    interceptor.setRetryOperations(template);
    interceptor.setRecoverer(new MethodInvocationRecoverer<Void>() {
      public Void recover(Object[] args, Throwable cause) {
        return null;

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      public Object invoke(MethodInvocation invocation) throws Throwable {
        list.add("chain");
        return invocation.proceed();
      }
    });
    RetryTemplate template = new RetryTemplate();
    template.setRetryPolicy(new SimpleRetryPolicy(2, Collections
        .<Class<? extends Throwable>, Boolean> singletonMap(Exception.class, true)));
    interceptor.setRetryOperations(template);
    service.service();
    assertEquals(2, count);
    assertEquals(2, list.size());

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  }


  @Test
  public void testRetryExceptionAfterTooManyAttempts() throws Exception {
    ((Advised) service).addAdvice(interceptor);
    RetryTemplate template = new RetryTemplate();
    template.setRetryPolicy(new NeverRetryPolicy());
    interceptor.setRetryOperations(template);
    try {
      service.service();
      fail("Expected Exception.");
    }

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    assertEquals(3, TestUtils.getPropertyValue(interceptor, "retryOperations.retryPolicy.maxAttempts"));
  }


  @Test
  public void testWithCustomRetryTemplate() {
    RetryOperations retryOperations = new RetryTemplate();
    StatefulRetryOperationsInterceptor interceptor = RetryInterceptorBuilder.stateful()
        .retryOperations(retryOperations)
        .build();
    assertEquals(3, TestUtils.getPropertyValue(interceptor, "retryOperations.retryPolicy.maxAttempts"));
    assertSame(retryOperations, TestUtils.getPropertyValue(interceptor, "retryOperations"));

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        /**
         * Do not have Spring AMQP re-try messages upon failure, leave it to Camel
         * @return An advice chain populated with a NeverRetryPolicy
         */
        public final Advice[] getAdviceChain() {
            RetryTemplate retryRule = new RetryTemplate();
            retryRule.setRetryPolicy(new NeverRetryPolicy());
            
            StatefulRetryOperationsInterceptorFactoryBean retryOperation = new StatefulRetryOperationsInterceptorFactoryBean();
            retryOperation.setRetryOperations(retryRule);
            retryOperation.setMessageKeyGeneretor(new DefaultKeyGenerator());

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    SimpleMessageConverter messageConverter = new SimpleMessageConverter();
    // There will be no key for these messages so they cannot be recovered...
    messageConverter.setCreateMessageIds(false);
    this.messageConverter = messageConverter;
    // Beware of context cache busting if retry policy fails...
    this.retryTemplate = new RetryTemplate();
    this.retryTemplate.setRetryContextCache(new MapRetryContextCache(1));
    // The container should have shutdown, so there are now no active consumers
    exception.handleAssertionErrors();
    exception.expectMessage("expected:<1> but was:<0>");
    doTestStatefulRetry(messageCount, txSize, failFrequency, concurrentConsumers);

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        logger.info("Recovered: [" + SerializationUtils.deserialize(message.getBody()).toString()+"], message: " +message);
        latch.countDown();
      }
    });
    if (retryTemplate == null) {
      retryTemplate = new RetryTemplate();
    }
    factory.setRetryOperations(retryTemplate);
    Advice retryInterceptor = factory.getObject();
    return retryInterceptor;
  }

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    container.setQueueNames("retry.test.queue");


    StatefulRetryOperationsInterceptorFactoryBean fb = new StatefulRetryOperationsInterceptorFactoryBean();


    // use an external template so we can share his cache
    RetryTemplate retryTemplate = new RetryTemplate();
    RetryContextCache cache = new MapRetryContextCache();
    retryTemplate.setRetryContextCache(cache);
    fb.setRetryOperations(retryTemplate);


    // give him a reference to the retry cache so he can clean it up
    MissingMessageIdAdvice missingIdAdvice = new MissingMessageIdAdvice(cache);

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