Examples with SimpleResourceAllocationPolicies org.apache.pulsar.broker.loadbalance.impl.SimpleResourceAllocationPolicies used on opensource projects

Example 1 with SimpleResourceAllocationPolicies

use of org.apache.pulsar.broker.loadbalance.impl.SimpleResourceAllocationPolicies in project incubator-pulsar by apache.

the class ModularLoadManagerImplTest method testNamespaceIsolationPoliciesForPrimaryAndSecondaryBrokers.

/**
 * It verifies namespace-isolation policies with primary and secondary brokers.
 *
 * usecase:
 *
 * <pre>
 *  1. Namespace: primary=broker1, secondary=broker2, shared=broker3, min_limit = 1
 *     a. available-brokers: broker1, broker2, broker3 => result: broker1
 *     b. available-brokers: broker2, broker3          => result: broker2
 *     c. available-brokers: broker3                   => result: NULL
 *  2. Namespace: primary=broker1, secondary=broker2, shared=broker3, min_limit = 2
 *     a. available-brokers: broker1, broker2, broker3 => result: broker1, broker2
 *     b. available-brokers: broker2, broker3          => result: broker2
 *     c. available-brokers: broker3                   => result: NULL
 * </pre>
 *
 * @throws Exception
 */
@Test
public void testNamespaceIsolationPoliciesForPrimaryAndSecondaryBrokers() throws Exception {
    final String property = "my-property";
    final String cluster = "use";
    final String namespace = "my-ns";
    final String broker1Address = pulsar1.getAdvertisedAddress() + "0";
    final String broker2Address = pulsar2.getAdvertisedAddress() + "1";
    final String sharedBroker = "broker3";
    admin1.clusters().createCluster(cluster, new ClusterData("http://" + pulsar1.getAdvertisedAddress()));
    admin1.properties().createProperty(property, new PropertyAdmin(Lists.newArrayList("appid1", "appid2"), Sets.newHashSet(cluster)));
    admin1.namespaces().createNamespace(property + "/" + cluster + "/" + namespace);
    // set a new policy
    String newPolicyJsonTemplate = "{\"namespaces\":[\"%s/%s/%s.*\"],\"primary\":[\"%s\"]," + "\"secondary\":[\"%s\"],\"auto_failover_policy\":{\"policy_type\":\"min_available\",\"parameters\":{\"min_limit\":%s,\"usage_threshold\":80}}}";
    String newPolicyJson = String.format(newPolicyJsonTemplate, property, cluster, namespace, broker1Address, broker2Address, 1);
    String newPolicyName = "my-ns-isolation-policies";
    ObjectMapper jsonMapper = ObjectMapperFactory.create();
    NamespaceIsolationData nsPolicyData = jsonMapper.readValue(newPolicyJson.getBytes(), NamespaceIsolationData.class);
    admin1.clusters().createNamespaceIsolationPolicy("use", newPolicyName, nsPolicyData);
    SimpleResourceAllocationPolicies simpleResourceAllocationPolicies = new SimpleResourceAllocationPolicies(pulsar1);
    ServiceUnitId serviceUnit = LoadBalancerTestingUtils.makeBundles(nsFactory, property, cluster, namespace, 1)[0];
    BrokerTopicLoadingPredicate brokerTopicLoadingPredicate = new BrokerTopicLoadingPredicate() {

        @Override
        public boolean isEnablePersistentTopics(String brokerUrl) {
            return true;
        }

        @Override
        public boolean isEnableNonPersistentTopics(String brokerUrl) {
            return true;
        }
    };
    // (1) now we have isolation policy : primary=broker1, secondary=broker2, minLimit=1
    // test1: shared=1, primary=1, secondary=1 => It should return 1 primary broker only
    Set<String> brokerCandidateCache = Sets.newHashSet();
    Set<String> availableBrokers = Sets.newHashSet(sharedBroker, broker1Address, broker2Address);
    LoadManagerShared.applyNamespacePolicies(serviceUnit, simpleResourceAllocationPolicies, brokerCandidateCache, availableBrokers, brokerTopicLoadingPredicate);
    assertEquals(brokerCandidateCache.size(), 1);
    assertTrue(brokerCandidateCache.contains(broker1Address));
    // test2: shared=1, primary=0, secondary=1 => It should return 1 secondary broker only
    brokerCandidateCache = Sets.newHashSet();
    availableBrokers = Sets.newHashSet(sharedBroker, broker2Address);
    LoadManagerShared.applyNamespacePolicies(serviceUnit, simpleResourceAllocationPolicies, brokerCandidateCache, availableBrokers, brokerTopicLoadingPredicate);
    assertEquals(brokerCandidateCache.size(), 1);
    assertTrue(brokerCandidateCache.contains(broker2Address));
    // test3: shared=1, primary=0, secondary=0 => It should return 0 broker
    brokerCandidateCache = Sets.newHashSet();
    availableBrokers = Sets.newHashSet(sharedBroker);
    LoadManagerShared.applyNamespacePolicies(serviceUnit, simpleResourceAllocationPolicies, brokerCandidateCache, availableBrokers, brokerTopicLoadingPredicate);
    assertEquals(brokerCandidateCache.size(), 0);
    // (2) now we will have isolation policy : primary=broker1, secondary=broker2, minLimit=2
    newPolicyJson = String.format(newPolicyJsonTemplate, property, cluster, namespace, broker1Address, broker2Address, 2);
    nsPolicyData = jsonMapper.readValue(newPolicyJson.getBytes(), NamespaceIsolationData.class);
    admin1.clusters().createNamespaceIsolationPolicy("use", newPolicyName, nsPolicyData);
    // test1: shared=1, primary=1, secondary=1 => It should return primary + secondary
    brokerCandidateCache = Sets.newHashSet();
    availableBrokers = Sets.newHashSet(sharedBroker, broker1Address, broker2Address);
    LoadManagerShared.applyNamespacePolicies(serviceUnit, simpleResourceAllocationPolicies, brokerCandidateCache, availableBrokers, brokerTopicLoadingPredicate);
    assertEquals(brokerCandidateCache.size(), 2);
    assertTrue(brokerCandidateCache.contains(broker1Address));
    assertTrue(brokerCandidateCache.contains(broker2Address));
    // test2: shared=1, secondary=1 => It should return secondary
    brokerCandidateCache = Sets.newHashSet();
    availableBrokers = Sets.newHashSet(sharedBroker, broker2Address);
    LoadManagerShared.applyNamespacePolicies(serviceUnit, simpleResourceAllocationPolicies, brokerCandidateCache, availableBrokers, brokerTopicLoadingPredicate);
    assertEquals(brokerCandidateCache.size(), 1);
    assertTrue(brokerCandidateCache.contains(broker2Address));
    // test3: shared=1, => It should return 0 broker
    brokerCandidateCache = Sets.newHashSet();
    availableBrokers = Sets.newHashSet(sharedBroker);
    LoadManagerShared.applyNamespacePolicies(serviceUnit, simpleResourceAllocationPolicies, brokerCandidateCache, availableBrokers, brokerTopicLoadingPredicate);
    assertEquals(brokerCandidateCache.size(), 0);
}