Examples with Backoff org.apache.pulsar.client.impl.Backoff used on opensource projects

Example 1 with Backoff

use of org.apache.pulsar.client.impl.Backoff in project pulsar by apache.

the class SystemTopicBasedTopicPoliciesService method createSystemTopicClientWithRetry.

protected CompletableFuture<SystemTopicClient.Reader<PulsarEvent>> createSystemTopicClientWithRetry(NamespaceName namespace) {
    CompletableFuture<SystemTopicClient.Reader<PulsarEvent>> result = new CompletableFuture<>();
    try {
        createSystemTopicFactoryIfNeeded();
    } catch (PulsarServerException e) {
        result.completeExceptionally(e);
        return result;
    }
    SystemTopicClient<PulsarEvent> systemTopicClient = namespaceEventsSystemTopicFactory.createTopicPoliciesSystemTopicClient(namespace);
    Backoff backoff = new Backoff(1, TimeUnit.SECONDS, 3, TimeUnit.SECONDS, 10, TimeUnit.SECONDS);
    RetryUtil.retryAsynchronously(systemTopicClient::newReaderAsync, backoff, pulsarService.getExecutor(), result);
    return result;
}

Example 2 with Backoff

use of org.apache.pulsar.client.impl.Backoff in project pulsar by yahoo.

the class SystemTopicBasedTopicPoliciesService method createSystemTopicClientWithRetry.

protected CompletableFuture<SystemTopicClient.Reader<PulsarEvent>> createSystemTopicClientWithRetry(NamespaceName namespace) {
    CompletableFuture<SystemTopicClient.Reader<PulsarEvent>> result = new CompletableFuture<>();
    try {
        createSystemTopicFactoryIfNeeded();
    } catch (PulsarServerException e) {
        result.completeExceptionally(e);
        return result;
    }
    SystemTopicClient<PulsarEvent> systemTopicClient = namespaceEventsSystemTopicFactory.createTopicPoliciesSystemTopicClient(namespace);
    Backoff backoff = new Backoff(1, TimeUnit.SECONDS, 3, TimeUnit.SECONDS, 10, TimeUnit.SECONDS);
    RetryUtil.retryAsynchronously(systemTopicClient::newReaderAsync, backoff, pulsarService.getExecutor(), result);
    return result;
}

Example 3 with Backoff

use of org.apache.pulsar.client.impl.Backoff in project pulsar by yahoo.

the class TopicPoliciesService method getTopicPoliciesAsyncWithRetry.

/**
 * When getting TopicPolicies, if the initialization has not been completed,
 * we will go back off and try again until time out.
 * @param topicName topic name
 * @param backoff back off policy
 * @param isGlobal is global policies
 * @return CompletableFuture<Optional<TopicPolicies>>
 */
default CompletableFuture<Optional<TopicPolicies>> getTopicPoliciesAsyncWithRetry(TopicName topicName, final Backoff backoff, ScheduledExecutorService scheduledExecutorService, boolean isGlobal) {
    CompletableFuture<Optional<TopicPolicies>> response = new CompletableFuture<>();
    Backoff usedBackoff = backoff == null ? new BackoffBuilder().setInitialTime(500, TimeUnit.MILLISECONDS).setMandatoryStop(DEFAULT_GET_TOPIC_POLICY_TIMEOUT, TimeUnit.MILLISECONDS).setMax(DEFAULT_GET_TOPIC_POLICY_TIMEOUT, TimeUnit.MILLISECONDS).create() : backoff;
    try {
        RetryUtil.retryAsynchronously(() -> {
            CompletableFuture<Optional<TopicPolicies>> future = new CompletableFuture<>();
            try {
                future.complete(Optional.ofNullable(getTopicPolicies(topicName, isGlobal)));
            } catch (BrokerServiceException.TopicPoliciesCacheNotInitException exception) {
                future.completeExceptionally(exception);
            }
            return future;
        }, usedBackoff, scheduledExecutorService, response);
    } catch (Exception e) {
        response.completeExceptionally(e);
    }
    return response;
}

Example 4 with Backoff

use of org.apache.pulsar.client.impl.Backoff in project pulsar by yahoo.

the class SystemTopicBasedTopicPoliciesServiceTest method testGetPolicyTimeout.

@Test
public void testGetPolicyTimeout() throws Exception {
    SystemTopicBasedTopicPoliciesService service = (SystemTopicBasedTopicPoliciesService) pulsar.getTopicPoliciesService();
    Awaitility.await().untilAsserted(() -> assertTrue(service.policyCacheInitMap.get(TOPIC1.getNamespaceObject())));
    service.policyCacheInitMap.put(TOPIC1.getNamespaceObject(), false);
    long start = System.currentTimeMillis();
    Backoff backoff = new BackoffBuilder().setInitialTime(500, TimeUnit.MILLISECONDS).setMandatoryStop(5000, TimeUnit.MILLISECONDS).setMax(1000, TimeUnit.MILLISECONDS).create();
    try {
        service.getTopicPoliciesAsyncWithRetry(TOPIC1, backoff, pulsar.getExecutor(), false).get();
    } catch (Exception e) {
        assertTrue(e.getCause() instanceof TopicPoliciesCacheNotInitException);
    }
    long cost = System.currentTimeMillis() - start;
    assertTrue("actual:" + cost, cost >= 5000 - 1000);
}

Example 5 with Backoff

use of org.apache.pulsar.client.impl.Backoff in project incubator-pulsar by apache.

the class SystemTopicBasedTopicPoliciesService method createSystemTopicClientWithRetry.

protected CompletableFuture<SystemTopicClient.Reader<PulsarEvent>> createSystemTopicClientWithRetry(NamespaceName namespace) {
    CompletableFuture<SystemTopicClient.Reader<PulsarEvent>> result = new CompletableFuture<>();
    try {
        createSystemTopicFactoryIfNeeded();
    } catch (PulsarServerException e) {
        result.completeExceptionally(e);
        return result;
    }
    SystemTopicClient<PulsarEvent> systemTopicClient = namespaceEventsSystemTopicFactory.createTopicPoliciesSystemTopicClient(namespace);
    Backoff backoff = new Backoff(1, TimeUnit.SECONDS, 3, TimeUnit.SECONDS, 10, TimeUnit.SECONDS);
    RetryUtil.retryAsynchronously(systemTopicClient::newReaderAsync, backoff, pulsarService.getExecutor(), result);
    return result;
}