Examples with Fallback dev.failsafe.Fallback used on opensource projects

Example 1 with Fallback

use of dev.failsafe.Fallback in project failsafe by jhalterman.

the class DelayableRetryPolicyTest method shouldDelayOnMatchingFailureType.

public void shouldDelayOnMatchingFailureType() {
    AtomicInteger delays = new AtomicInteger(0);
    RetryPolicy<Integer> retryPolicy = RetryPolicy.<Integer>builder().handle(UncheckedExpectedException.class).withMaxRetries(4).withDelayFnOn(ctx -> {
        // side-effect for test purposes
        delays.incrementAndGet();
        return Duration.ofNanos(1);
    }, DelayException.class).build();
    AtomicInteger attempts = new AtomicInteger(0);
    int result = Failsafe.with(Fallback.of(123), retryPolicy).get(() -> {
        int i = attempts.getAndIncrement();
        switch(i) {
            case 0:
            case 2:
                throw new DelayException();
            default:
                throw new UncheckedExpectedException();
        }
    });
    assertEquals(result, 123, "Fallback should be used");
    assertEquals(attempts.get(), 5, "Expecting five attempts (1 + 4 retries)");
    assertEquals(delays.get(), 2, "Expecting two dynamic delays matching DelayException failure");
}

Example 2 with Fallback

use of dev.failsafe.Fallback in project failsafe by jhalterman.

the class DelayableRetryPolicyTest method shouldDelayOnMatchingResult.

public void shouldDelayOnMatchingResult() {
    AtomicInteger delays = new AtomicInteger(0);
    RetryPolicy<Object> retryPolicy = RetryPolicy.builder().handleResultIf(result -> true).withMaxRetries(4).withDelayFnWhen(ctx -> {
        // side-effect for test purposes
        delays.incrementAndGet();
        return Duration.ofNanos(1);
    }, "expected").build();
    Fallback<Object> fallback = Fallback.<Object>builder(123).handleResultIf(result -> true).build();
    AtomicInteger attempts = new AtomicInteger(0);
    Object result = Failsafe.with(fallback, retryPolicy).get(() -> {
        int i = attempts.getAndIncrement();
        switch(i) {
            case 0:
            case 3:
                return "expected";
            default:
                return i;
        }
    });
    assertEquals(result, 123, "Fallback should be used");
    assertEquals(attempts.get(), 5, "Expecting five attempts (1 + 4 retries)");
    assertEquals(delays.get(), 2, "Expecting two dynamic delays matching String result");
}