/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.pulsar.broker.loadbalance;

import static org.testng.Assert.assertEquals;
import static org.testng.Assert.assertFalse;
import static org.testng.Assert.assertNotEquals;
import static org.testng.Assert.assertTrue;
import com.google.common.collect.BoundType;
import com.google.common.collect.Range;
import com.google.common.collect.Sets;
import com.google.common.hash.Hashing;
import io.opentelemetry.api.OpenTelemetry;
import java.lang.reflect.Field;
import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;
import java.util.UUID;
import lombok.Cleanup;
import org.apache.commons.lang3.reflect.FieldUtils;
import org.apache.pulsar.broker.PulsarService;
import org.apache.pulsar.broker.ServiceConfiguration;
import org.apache.pulsar.broker.auth.MockedPulsarServiceBaseTest;
import org.apache.pulsar.broker.loadbalance.extensions.channel.ServiceUnitStateData;
import org.apache.pulsar.broker.loadbalance.impl.BundleRangeCache;
import org.apache.pulsar.broker.loadbalance.impl.LoadManagerShared;
import org.apache.pulsar.broker.loadbalance.impl.ModularLoadManagerImpl;
import org.apache.pulsar.broker.loadbalance.impl.ModularLoadManagerWrapper;
import org.apache.pulsar.broker.resources.NamespaceResources;
import org.apache.pulsar.broker.resources.PulsarResources;
import org.apache.pulsar.broker.resources.TenantResources;
import org.apache.pulsar.broker.testcontext.PulsarTestContext;
import org.apache.pulsar.client.admin.PulsarAdmin;
import org.apache.pulsar.client.api.Producer;
import org.apache.pulsar.client.api.PulsarClient;
import org.apache.pulsar.common.naming.NamespaceBundle;
import org.apache.pulsar.common.naming.NamespaceBundleFactory;
import org.apache.pulsar.common.naming.NamespaceBundles;
import org.apache.pulsar.common.naming.NamespaceName;
import org.apache.pulsar.common.naming.ServiceUnitId;
import org.apache.pulsar.common.policies.data.FailureDomain;
import org.apache.pulsar.common.policies.data.Policies;
import org.apache.pulsar.common.policies.data.TenantInfo;
import org.apache.pulsar.common.policies.data.TenantInfoImpl;
import org.apache.pulsar.metadata.api.extended.MetadataStoreExtended;
import org.awaitility.Awaitility;
import org.testng.annotations.AfterClass;
import org.testng.annotations.BeforeClass;
import org.testng.annotations.Test;

@Test(groups = "broker")
public class AntiAffinityNamespaceGroupTest extends MockedPulsarServiceBaseTest {

    private PulsarTestContext additionalPulsarTestContext;
    private PulsarService pulsar1;
    private PulsarAdmin admin1;
    private PulsarService pulsar2;
    protected String primaryHost;
    protected String secondaryHost;
    private NamespaceBundleFactory nsFactory;
    protected Object primaryLoadManager;
    private Object secondaryLoadManager;


    private PulsarResources resources;

    private static Object getField(final Object instance, final String fieldName) throws Exception {
        final Field field = instance.getClass().getDeclaredField(fieldName);
        field.setAccessible(true);
        return field.get(instance);
    }

    void setupConfigs(ServiceConfiguration conf){
        conf.setAllowAutoTopicCreation(true);
        conf.setLoadManagerClassName(getLoadManagerClassName());
        conf.setFailureDomainsEnabled(true);
        conf.setLoadBalancerEnabled(true);
        // Don't want overloaded threshold to affect namespace placement
        conf.setLoadBalancerBrokerOverloadedThresholdPercentage(400);
    }

    @BeforeClass
    @Override
    public void setup() throws Exception {
        setupConfigs(conf);
        super.internalSetup(conf);
        pulsar1 = pulsar;
        primaryHost = pulsar1.getBrokerId();
        admin1 = admin;

        var config2 = getDefaultConf();
        setupConfigs(config2);
        additionalPulsarTestContext = createAdditionalPulsarTestContext(config2);
        pulsar2 = additionalPulsarTestContext.getPulsarService();
        secondaryHost = pulsar2.getBrokerId();

        primaryLoadManager = getField(pulsar1.getLoadManager().get(), "loadManager");
        secondaryLoadManager = getField(pulsar2.getLoadManager().get(), "loadManager");
        nsFactory = new NamespaceBundleFactory(pulsar1, Hashing.crc32());

        Awaitility.await().untilAsserted(() -> {
            assertEquals(pulsar1.getState(), PulsarService.State.Started);
            assertEquals(pulsar2.getState(), PulsarService.State.Started);
        });

        admin1.tenants().createTenant("my-tenant",
                createDefaultTenantInfo());
    }

    @Override
    @AfterClass
    protected void cleanup() throws Exception {
        pulsar1 = null;
        pulsar2.close();
        super.internalCleanup();
        this.additionalPulsarTestContext.close();
    }

    protected void beforePulsarStart(PulsarService pulsar) throws Exception {
        if (resources == null) {
            MetadataStoreExtended localStore = pulsar.createLocalMetadataStore(null, OpenTelemetry.noop());
            MetadataStoreExtended configStore =
                    (MetadataStoreExtended) pulsar.createConfigurationMetadataStore(null, OpenTelemetry.noop());
            resources = new PulsarResources(localStore, configStore);
        }
        this.createNamespaceIfNotExists(resources, NamespaceName.SYSTEM_NAMESPACE.getTenant(),
                NamespaceName.SYSTEM_NAMESPACE);
    }

    protected void createNamespaceIfNotExists(PulsarResources resources,
                                              String publicTenant,
                                              NamespaceName ns) throws Exception {
        TenantResources tr = resources.getTenantResources();
        NamespaceResources nsr = resources.getNamespaceResources();

        if (!tr.tenantExists(publicTenant)) {
            tr.createTenant(publicTenant,
                    TenantInfo.builder()
                            .adminRoles(Sets.newHashSet(conf.getSuperUserRoles()))
                            .allowedClusters(Sets.newHashSet(conf.getClusterName()))
                            .build());
        }

        if (!nsr.namespaceExists(ns)) {
            Policies nsp = new Policies();
            nsp.replication_clusters = Collections.singleton(conf.getClusterName());
            nsr.createPolicies(ns, nsp);
        }
    }

    protected Object getBundleOwnershipData(){
        return new BundleRangeCache();
    }

    protected String getLoadManagerClassName() {
        return ModularLoadManagerImpl.class.getName();
    }


    @Test
    public void testClusterDomain() {

    }

    /**
     *
     * It verifies anti-affinity-namespace assignment with failure-domain.
     *
     * <pre>
     * Domain     Brokers-count
     * ________  ____________
     * domain-0   broker-0,broker-1
     * domain-1   broker-2,broker-3
     *
     * Anti-affinity-namespace assignment
     *
     * (1) ns0 -> candidate-brokers: b0, b1, b2, b3 => selected b0
     * (2) ns1 -> candidate-brokers: b2, b3         => selected b2
     * (3) ns2 -> candidate-brokers: b1, b3         => selected b1
     * (4) ns3 -> candidate-brokers: b3             => selected b3
     * (5) ns4 -> candidate-brokers: b0, b1, b2, b3 => selected b0
     *
     * "candidate" broker to own anti-affinity-namespace = b2 or b4
     *
     * </pre>
     *
     */
    @Test
    public void testAntiAffinityNamespaceFilteringWithDomain() throws Exception {

        final String namespace = "my-tenant/my-ns";
        final int totalNamespaces = 5;
        final String namespaceAntiAffinityGroup = "my-antiaffinity";
        final String bundle = "/0x00000000_0xffffffff";
        final int totalBrokers = 4;

        pulsar1.getConfiguration().setFailureDomainsEnabled(true);

        for (int i = 0; i < totalNamespaces; i++) {
            final String ns = namespace + i;
            admin1.namespaces().createNamespace(ns);
            admin1.namespaces().setNamespaceAntiAffinityGroup(ns, namespaceAntiAffinityGroup);
        }

        Set<String> brokers = new HashSet<>();
        Map<String, String> brokerToDomainMap = new HashMap<>();
        brokers.add("brokerName-0");
        brokerToDomainMap.put("brokerName-0", "domain-0");
        brokers.add("brokerName-1");
        brokerToDomainMap.put("brokerName-1", "domain-0");
        brokers.add("brokerName-2");
        brokerToDomainMap.put("brokerName-2", "domain-1");
        brokers.add("brokerName-3");
        brokerToDomainMap.put("brokerName-3", "domain-1");

        Set<String> candidate = new HashSet<>();
        Object brokerToNamespaceToBundleRange = getBundleOwnershipData();

        assertEquals(brokers.size(), totalBrokers);

        String assignedNamespace = namespace + "0" + bundle;
        candidate.addAll(brokers);

        // for namespace-0 all brokers available
        filterAntiAffinityGroupOwnedBrokers(pulsar1, assignedNamespace, brokers,
                brokerToNamespaceToBundleRange, brokerToDomainMap);
        assertEquals(brokers.size(), totalBrokers);

        // add namespace-0 to broker-0 of domain-0 => state: n0->b0
        selectBrokerForNamespace(brokerToNamespaceToBundleRange, "brokerName-0", namespace + "0", assignedNamespace);
        candidate.addAll(brokers);
        // for namespace-1 only domain-1 brokers are available as broker-0 already owns namespace-0
        assignedNamespace = namespace + "1" + bundle;
        filterAntiAffinityGroupOwnedBrokers(pulsar1, assignedNamespace, candidate,
                brokerToNamespaceToBundleRange, brokerToDomainMap);
        assertEquals(candidate.size(), 2);
        candidate.forEach(broker -> assertEquals(brokerToDomainMap.get(broker), "domain-1"));

        // add namespace-1 to broker-2 of domain-1 => state: n0->b0, n1->b2
        selectBrokerForNamespace(brokerToNamespaceToBundleRange, "brokerName-2", namespace + "1", assignedNamespace);
        candidate.addAll(brokers);
        // for namespace-2 only brokers available are : broker-1 and broker-3
        assignedNamespace = namespace + "2" + bundle;
        filterAntiAffinityGroupOwnedBrokers(pulsar1, assignedNamespace, candidate,
                brokerToNamespaceToBundleRange, brokerToDomainMap);
        assertEquals(candidate.size(), 2);
        assertTrue(candidate.contains("brokerName-1"));
        assertTrue(candidate.contains("brokerName-3"));

        // add namespace-2 to broker-1 of domain-0 => state: n0->b0, n1->b2, n2->b1
        selectBrokerForNamespace(brokerToNamespaceToBundleRange, "brokerName-1", namespace + "2", assignedNamespace);
        candidate.addAll(brokers);
        // for namespace-3 only brokers available are : broker-3
        assignedNamespace = namespace + "3" + bundle;
        filterAntiAffinityGroupOwnedBrokers(pulsar1, assignedNamespace, candidate,
                brokerToNamespaceToBundleRange, brokerToDomainMap);
        assertEquals(candidate.size(), 1);
        assertTrue(candidate.contains("brokerName-3"));
        // add namespace-3 to broker-3 of domain-1 => state: n0->b0, n1->b2, n2->b1, n3->b3
        selectBrokerForNamespace(brokerToNamespaceToBundleRange, "brokerName-3", namespace + "3", assignedNamespace);
        candidate.addAll(brokers);
        // for namespace-4 only brokers available are : all 4 brokers
        assignedNamespace = namespace + "4" + bundle;
        filterAntiAffinityGroupOwnedBrokers(pulsar1, assignedNamespace, candidate,
                brokerToNamespaceToBundleRange, brokerToDomainMap);
        assertEquals(candidate.size(), 4);
    }

    /**
     * It verifies anti-affinity-namespace assignment without failure-domain enabled.
     *
     * <pre>
     *  Anti-affinity-namespace assignment
     *
     * (1) ns0 -> candidate-brokers: b0, b1, b2     => selected b0
     * (2) ns1 -> candidate-brokers: b1, b2         => selected b1
     * (3) ns2 -> candidate-brokers: b2             => selected b2
     * (5) ns3 -> candidate-brokers: b0, b1, b2     => selected b0
     * </pre>
     *
     *
     * @throws Exception
     */
    @Test
    public void testAntiAffinityNamespaceFilteringWithoutDomain() throws Exception {

        final String namespace = "my-tenant/my-ns-wo-domain";
        final int totalNamespaces = 5;
        final String namespaceAntiAffinityGroup = "my-antiaffinity-wo-domain";
        final String bundle = "/0x00000000_0xffffffff";

        for (int i = 0; i < totalNamespaces; i++) {
            final String ns = namespace + i;
            admin1.namespaces().createNamespace(ns);
            admin1.namespaces().setNamespaceAntiAffinityGroup(ns, namespaceAntiAffinityGroup);
        }

        Set<String> brokers = new HashSet<>();
        Set<String> candidate = new HashSet<>();
        Object brokerToNamespaceToBundleRange = getBundleOwnershipData();
        brokers.add("broker-0");
        brokers.add("broker-1");
        brokers.add("broker-2");

        String assignedNamespace = namespace + "0" + bundle;

        // all brokers available so, candidate will be all 3 brokers
        candidate.addAll(brokers);
        filterAntiAffinityGroupOwnedBrokers(pulsar1, assignedNamespace, brokers,
                brokerToNamespaceToBundleRange, null);
        assertEquals(brokers.size(), 3);

        // add ns-0 to broker-0
        selectBrokerForNamespace(brokerToNamespaceToBundleRange, "broker-0", namespace + "0", assignedNamespace);
        candidate.addAll(brokers);
        assignedNamespace = namespace + "1" + bundle;
        // available brokers for ns-1 => broker-1, broker-2
        filterAntiAffinityGroupOwnedBrokers(pulsar1, assignedNamespace, candidate,
                brokerToNamespaceToBundleRange, null);
        assertEquals(candidate.size(), 2);
        assertTrue(candidate.contains("broker-1"));
        assertTrue(candidate.contains("broker-2"));

        // add ns-1 to broker-1
        selectBrokerForNamespace(brokerToNamespaceToBundleRange, "broker-1", namespace + "1", assignedNamespace);
        candidate.addAll(brokers);
        // available brokers for ns-2 => broker-2
        assignedNamespace = namespace + "2" + bundle;
        filterAntiAffinityGroupOwnedBrokers(pulsar1, assignedNamespace, candidate,
                brokerToNamespaceToBundleRange, null);
        assertEquals(candidate.size(), 1);
        assertTrue(candidate.contains("broker-2"));

        // add ns-2 to broker-2
        selectBrokerForNamespace(brokerToNamespaceToBundleRange, "broker-2", namespace + "2", assignedNamespace);
        candidate.addAll(brokers);
        // available brokers for ns-3 => broker-0, broker-1, broker-2
        assignedNamespace = namespace + "3" + bundle;
        filterAntiAffinityGroupOwnedBrokers(pulsar1, assignedNamespace, candidate,
                brokerToNamespaceToBundleRange, null);
        assertEquals(candidate.size(), 3);
    }

    protected void selectBrokerForNamespace(
            Object ownershipData,
            String broker, String namespace, String assignedBundleName) {

        final var brokerToNamespaceToBundleRange = (BundleRangeCache) ownershipData;
        brokerToNamespaceToBundleRange.add(broker, namespace, assignedBundleName);
    }

    /**
     * It verifies anti-affinity with failure domain enabled with 2 brokers.
     *
     * Note: in this class's setup method, the LoadBalancerBrokerOverloadedThresholdPercentage
     * is set to 400 to ensure that the overloaded logic doesn't affect the broker selection.
     * Without that configuration, two namespaces in the same anti-affinity group could
     * be placed on the same broker. The CPU usage can be over 100%, and if we run with more
     * than 4 cores, it could conceivably be above 400%. If this test becomes flaky again,
     * look at the logs to see if there is a mention of an overloaded broker.
     *
     * <pre>
     * 1. Register brokers to domain: domain-1: broker1 & domain-2: broker2
     * 2. Load-Manager receives a watch and updates brokerToDomain cache with new domain data
     * 3. Create two namespace with anti-affinity
     * 4. Load-manager selects broker for each namespace such that from different domains
     *
     * </pre>
     *
     * @throws Exception
     */
    @Test
    public void testBrokerSelectionForAntiAffinityGroup() throws Exception {

        final String broker1 = primaryHost;
        final String broker2 = secondaryHost;
        final String cluster = pulsar1.getConfiguration().getClusterName();
        final String tenant = "tenant-" + UUID.randomUUID();
        final String namespace1 = tenant + "/ns1";
        final String namespace2 = tenant + "/ns2";
        final String namespaceAntiAffinityGroup = "group";

        FailureDomain domain1 = FailureDomain.builder()
                .brokers(Collections.singleton(broker1))
                .build();
        admin1.clusters().createFailureDomain(cluster, "domain1", domain1);

        FailureDomain domain2 = FailureDomain.builder()
                .brokers(Collections.singleton(broker2))
                .build();
        admin1.clusters().createFailureDomain(cluster, "domain2", domain2);

        admin1.tenants().createTenant(tenant, new TenantInfoImpl(null, Sets.newHashSet(cluster)));
        admin1.namespaces().createNamespace(namespace1);
        admin1.namespaces().createNamespace(namespace2);

        admin1.namespaces().setNamespaceAntiAffinityGroup(namespace1, namespaceAntiAffinityGroup);
        admin1.namespaces().setNamespaceAntiAffinityGroup(namespace2, namespaceAntiAffinityGroup);

        // validate strategically if brokerToDomainCache updated
        Awaitility.await().untilAsserted(() -> {
            assertTrue(isLoadManagerUpdatedDomainCache(primaryLoadManager));
            assertTrue(isLoadManagerUpdatedDomainCache(secondaryLoadManager));
        });

        ServiceUnitId serviceUnit1 = makeBundle(tenant, "ns1");
        String selectedBroker1 = selectBroker(serviceUnit1, primaryLoadManager);

        ServiceUnitId serviceUnit2 = makeBundle(tenant, "ns2");
        String selectedBroker2 = selectBroker(serviceUnit2, primaryLoadManager);

        assertNotEquals(selectedBroker1, selectedBroker2);

    }

    protected String selectBroker(ServiceUnitId serviceUnit, Object loadManager) {
        return ((ModularLoadManager) loadManager).selectBrokerForAssignment(serviceUnit).get();
    }

    /**
     * It verifies that load-shedding task should unload namespace only if there is a broker available which doesn't
     * cause uneven anti-affinity namespace distribution.
     *
     * <pre>
     * 1. broker1 owns ns-0 => broker1 can unload ns-0
     * 1. broker2 owns ns-1 => broker1 can unload ns-0
     * 1. broker3 owns ns-2 => broker1 can't unload ns-0 as all brokers have same no NS
     * </pre>
     *
     * @throws Exception
     */
    @Test
    public void testLoadSheddingUtilWithAntiAffinityNamespace() throws Exception {

        final String namespace = "my-tenant/my-ns-load-shedding-util";
        final int totalNamespaces = 5;
        final String namespaceAntiAffinityGroup = "my-antiaffinity-load-shedding-util";
        final String bundle = "/0x00000000_0xffffffff";

        for (int i = 0; i < totalNamespaces; i++) {
            final String ns = namespace + i;
            admin1.namespaces().createNamespace(ns);
            admin1.namespaces().setNamespaceAntiAffinityGroup(ns, namespaceAntiAffinityGroup);
        }

        Set<String> brokers = new HashSet<>();
        Set<String> candidate = new HashSet<>();
        Object brokerToNamespaceToBundleRange = getBundleOwnershipData();
        brokers.add("broker-0");
        brokers.add("broker-1");
        brokers.add("broker-2");

        String assignedNamespace = namespace + "0" + bundle;

        // all brokers available so, candidate will be all 3 brokers
        candidate.addAll(brokers);
        // add ns-0 to broker-0
        selectBrokerForNamespace(brokerToNamespaceToBundleRange, "broker-0", namespace + "0", assignedNamespace);
        String currentBroker = "broker-0";
        boolean shouldUnload = shouldAntiAffinityNamespaceUnload(namespace + "0", bundle,
                currentBroker, pulsar1, brokerToNamespaceToBundleRange, candidate);
        assertTrue(shouldUnload);
        // add ns-1 to broker-1
        selectBrokerForNamespace(brokerToNamespaceToBundleRange, "broker-1", namespace + "1", assignedNamespace);
        shouldUnload = shouldAntiAffinityNamespaceUnload(namespace + "0", bundle, currentBroker,
                pulsar1, brokerToNamespaceToBundleRange, candidate);
        assertTrue(shouldUnload);
        // add ns-2 to broker-2
        selectBrokerForNamespace(brokerToNamespaceToBundleRange, "broker-2", namespace + "2", assignedNamespace);
        shouldUnload = shouldAntiAffinityNamespaceUnload(namespace + "0", bundle, currentBroker,
                pulsar1, brokerToNamespaceToBundleRange, candidate);
        assertFalse(shouldUnload);

    }

    /**
     * It verifies that load-manager::shouldAntiAffinityNamespaceUnload checks that unloading should only happen if all
     * brokers have same number of anti-affinity namespaces.
     *
     * @throws Exception
     */
    @Test
    public void testLoadSheddingWithAntiAffinityNamespace() throws Exception {

        final String namespace = "my-tenant/my-ns-load-shedding";
        final int totalNamespaces = 5;
        final String namespaceAntiAffinityGroup = "my-antiaffinity-load-shedding";
        final String bundle = "0x00000000_0xffffffff";

        for (int i = 0; i < totalNamespaces; i++) {
            final String ns = namespace + i;
            admin1.namespaces().createNamespace(ns);
            admin1.namespaces().setNamespaceAntiAffinityGroup(ns, namespaceAntiAffinityGroup);
        }

        @Cleanup
        PulsarClient pulsarClient = PulsarClient.builder().serviceUrl(pulsar1.getSafeWebServiceAddress()).build();
        Producer<byte[]> producer = pulsarClient.newProducer().topic("persistent://" + namespace + "0/my-topic1")
                .create();
        pulsar1.getBrokerService().updateRates();
        verifyLoadSheddingWithAntiAffinityNamespace(namespace + "0", bundle);
        producer.close();
    }

    protected void verifyLoadSheddingWithAntiAffinityNamespace(String namespace, String bundle) {

        ModularLoadManagerImpl loadManager = (ModularLoadManagerImpl) ((ModularLoadManagerWrapper) pulsar1
                .getLoadManager().get()).getLoadManager();
        loadManager.updateAll();
        assertTrue(loadManager.shouldAntiAffinityNamespaceUnload(namespace, bundle, primaryHost));
    }

    protected boolean isLoadManagerUpdatedDomainCache(Object loadManager) throws Exception {
        @SuppressWarnings("unchecked")
        var brokerToFailureDomainMap = (Map<String, String>)
                FieldUtils.readDeclaredField(loadManager, "brokerToFailureDomainMap", true);
        return !brokerToFailureDomainMap.isEmpty();
    }

    private NamespaceBundle makeBundle(final String tenant, final String namespace) {
        return nsFactory.getBundle(NamespaceName.get(tenant, namespace),
                Range.range(NamespaceBundles.FULL_LOWER_BOUND, BoundType.CLOSED, NamespaceBundles.FULL_UPPER_BOUND,
                        BoundType.CLOSED));
    }

    private static void filterAntiAffinityGroupOwnedBrokers(
            PulsarService pulsar,
            String assignedNamespace,
            Set<String> brokers,
            Object ownershipData,
            Map<String, String> brokerToDomainMap) {
        if (ownershipData instanceof Set) {
            LoadManagerShared.filterAntiAffinityGroupOwnedBrokers(pulsar, assignedNamespace, brokers,
                    (Set<Map.Entry<String, ServiceUnitStateData>>) ownershipData, brokerToDomainMap);
        } else if (ownershipData instanceof BundleRangeCache) {
            LoadManagerShared.filterAntiAffinityGroupOwnedBrokers(pulsar, assignedNamespace, brokers,
                    (BundleRangeCache) ownershipData, brokerToDomainMap);
        } else {
            throw new RuntimeException("Unknown ownershipData class type");
        }
    }

    private static boolean shouldAntiAffinityNamespaceUnload(
            String namespace,
            String bundle,
            String currentBroker,
            PulsarService pulsar,
            Object ownershipData,
            Set<String> candidate) throws Exception {

        if (ownershipData instanceof Set) {
            return LoadManagerShared.shouldAntiAffinityNamespaceUnload(namespace, bundle,
                    currentBroker, pulsar, (Set<Map.Entry<String, ServiceUnitStateData>>) ownershipData, candidate);
        } else if (ownershipData instanceof BundleRangeCache) {
            return LoadManagerShared.shouldAntiAffinityNamespaceUnload(namespace, currentBroker, pulsar,
                    (BundleRangeCache) ownershipData, candidate);
        } else {
            throw new RuntimeException("Unknown ownershipData class type");
        }
    }

}
