Package org.springframework.util.backoff

Examples of org.springframework.util.backoff.ExponentialBackOff.start()

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  public final ExpectedException thrown = ExpectedException.none();

  @Test
  public void defaultInstance() {
    ExponentialBackOff backOff = new ExponentialBackOff();
    BackOffExecution execution = backOff.start();
    assertEquals(2000l, execution.nextBackOff());
    assertEquals(3000l, execution.nextBackOff());
    assertEquals(4500l, execution.nextBackOff());
  }
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  }

  @Test
  public void simpleIncrease() {
    ExponentialBackOff backOff = new ExponentialBackOff(100L, 2.0);
    BackOffExecution execution = backOff.start();
    assertEquals(100l, execution.nextBackOff());
    assertEquals(200l, execution.nextBackOff());
    assertEquals(400l, execution.nextBackOff());
    assertEquals(800l, execution.nextBackOff());
  }
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  @Test
  public void fixedIncrease() {
    ExponentialBackOff backOff = new ExponentialBackOff(100L, 1.0);
    backOff.setMaxElapsedTime(300l);

    BackOffExecution execution = backOff.start();
    assertEquals(100l, execution.nextBackOff());
    assertEquals(100l, execution.nextBackOff());
    assertEquals(100l, execution.nextBackOff());
    assertEquals(BackOffExecution.STOP, execution.nextBackOff());
  }
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  @Test
  public void maxIntervalReached() {
    ExponentialBackOff backOff = new ExponentialBackOff(2000L, 2.0);
    backOff.setMaxInterval(4000L);

    BackOffExecution execution = backOff.start();
    assertEquals(2000l, execution.nextBackOff());
    assertEquals(4000l, execution.nextBackOff());
    assertEquals(4000l, execution.nextBackOff()); // max reached
    assertEquals(4000l, execution.nextBackOff());
  }
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  @Test
  public void maxAttemptsReached() {
    ExponentialBackOff backOff = new ExponentialBackOff(2000L, 2.0);
    backOff.setMaxElapsedTime(4000L);

    BackOffExecution execution = backOff.start();
    assertEquals(2000l, execution.nextBackOff());
    assertEquals(4000l, execution.nextBackOff());
    assertEquals(BackOffExecution.STOP, execution.nextBackOff()); // > 4 sec wait in total
  }
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    ExponentialBackOff backOff = new ExponentialBackOff();
    backOff.setInitialInterval(2000L);
    backOff.setMultiplier(2.0);
    backOff.setMaxElapsedTime(4000L);

    BackOffExecution execution = backOff.start();
    BackOffExecution execution2 = backOff.start();

    assertEquals(2000l, execution.nextBackOff());
    assertEquals(2000l, execution2.nextBackOff());
    assertEquals(4000l, execution.nextBackOff());
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    backOff.setInitialInterval(2000L);
    backOff.setMultiplier(2.0);
    backOff.setMaxElapsedTime(4000L);

    BackOffExecution execution = backOff.start();
    BackOffExecution execution2 = backOff.start();

    assertEquals(2000l, execution.nextBackOff());
    assertEquals(2000l, execution2.nextBackOff());
    assertEquals(4000l, execution.nextBackOff());
    assertEquals(4000l, execution2.nextBackOff());
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  @Test
  public void maxIntervalReachedImmediately() {
    ExponentialBackOff backOff = new ExponentialBackOff(1000L, 2.0);
    backOff.setMaxInterval(50L);

    BackOffExecution execution = backOff.start();
    assertEquals(50L, execution.nextBackOff());
    assertEquals(50L, execution.nextBackOff());
  }

  @Test
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  }

  @Test
  public void toStringContent() {
    ExponentialBackOff backOff = new ExponentialBackOff(2000L, 2.0);
    BackOffExecution execution = backOff.start();
    assertEquals("ExponentialBackOff{currentInterval=n/a, multiplier=2.0}", execution.toString());
    execution.nextBackOff();
    assertEquals("ExponentialBackOff{currentInterval=2000ms, multiplier=2.0}", execution.toString());
    execution.nextBackOff();
    assertEquals("ExponentialBackOff{currentInterval=4000ms, multiplier=2.0}", execution.toString());
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