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

                }
            };
        }
        
        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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                }
            };
        }
        
        public final Advice[] getAdviceChain() {
            RetryTemplate retryRule = new RetryTemplate();
            retryRule.setRetryPolicy(new NeverRetryPolicy());
            StatefulRetryOperationsInterceptorFactoryBean retryOperation = new StatefulRetryOperationsInterceptorFactoryBean();
            retryOperation.setRetryOperations(retryRule);
            return new Advice[] { retryOperation.getObject() };
        }

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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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        /**
         * 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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  private NewMethodArgumentsIdentifier newMethodArgumentsIdentifier;


  private RetryOperations retryOperations;


  public StatefulRetryOperationsInterceptor() {
    RetryTemplate retryTemplate = new RetryTemplate();
    retryTemplate.setRetryPolicy(new NeverRetryPolicy());
    retryOperations = retryTemplate;
  }

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        .recoverer(getRecoverer(target, method))
        .build();
  }


  private MethodInterceptor getStatefulInterceptor(Object target, Method method, Retryable retryable) {
    RetryTemplate template = new RetryTemplate();
    template.setRetryContextCache(this.retryContextCache);
    template.setRetryPolicy(getRetryPolicy(retryable));
    template.setBackOffPolicy(getBackoffPolicy(retryable.backoff()));


    return RetryInterceptorBuilder.stateful()
        .retryOperations(template)
        .recoverer(getRecoverer(target, method))
        .keyGenerator(this.methodArgumentsKeyGenerator)

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  public void testExternalRetryWithFailAndNoRetry() throws Throwable {
    MockRetryCallback callback = new MockRetryCallback();


    RetryState retryState = new DefaultRetryState("foo");


    RetryTemplate retryTemplate = new RetryTemplate();
    MapRetryContextCache cache = new MapRetryContextCache();
    retryTemplate.setRetryContextCache(cache);
    retryTemplate.setRetryPolicy(new SimpleRetryPolicy(1, Collections
        .<Class<? extends Throwable>, Boolean> singletonMap(Exception.class, true)));


    assertFalse(cache.containsKey("foo"));


    try {
      retryTemplate.execute(callback, retryState);
      // The first failed attempt we expect to retry...
      fail("Expected RuntimeException");
    }
    catch (RuntimeException e) {
      assertEquals(null, e.getMessage());
    }


    assertTrue(cache.containsKey("foo"));


    try {
      retryTemplate.execute(callback, retryState);
      // We don't get a second attempt...
      fail("Expected ExhaustedRetryException");
    }
    catch (ExhaustedRetryException e) {
      // This is now the "exhausted" message:

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  public void testExternalRetryWithSuccessOnRetry() throws Throwable {
    MockRetryCallback callback = new MockRetryCallback();


    RetryState retryState = new DefaultRetryState("foo");


    RetryTemplate retryTemplate = new RetryTemplate();
    MapRetryContextCache cache = new MapRetryContextCache();
    retryTemplate.setRetryContextCache(cache);
    retryTemplate.setRetryPolicy(new SimpleRetryPolicy(2, Collections
        .<Class<? extends Throwable>, Boolean> singletonMap(Exception.class, true)));


    assertFalse(cache.containsKey("foo"));


    Object result = "start_foo";
    try {
      result = retryTemplate.execute(callback, retryState);
      // The first failed attempt we expect to retry...
      fail("Expected RuntimeException");
    }
    catch (RuntimeException e) {
      assertNull(e.getMessage());
    }


    assertTrue(cache.containsKey("foo"));


    result = retryTemplate.execute(callback, retryState);


    assertFalse(cache.containsKey("foo"));


    assertEquals(2, callback.attempts);
    assertEquals("bar", result);

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  @Test
  public void testExponentialBackOffIsExponential() throws Throwable {
    ExponentialBackOffPolicy policy = new ExponentialBackOffPolicy();
    policy.setInitialInterval(100);
    policy.setMultiplier(1.5);
    RetryTemplate template = new RetryTemplate();
    template.setBackOffPolicy(policy);
    final List<Long> times = new ArrayList<Long>();
    RetryState retryState = new DefaultRetryState("bar");
    for (int i = 0; i < 3; i++) {
      try {
        template.execute(new RetryCallback<String, Exception>() {
          public String doWithRetry(RetryContext context) throws Exception {
            times.add(System.currentTimeMillis());
            throw new Exception("Fail");
          }
        }, new RecoveryCallback<String>() {

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