| /** |
| * 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 java.util.Collections; |
| import java.util.List; |
| import java.util.Optional; |
| import java.util.Set; |
| import org.apache.bookkeeper.util.ZkUtils; |
| import org.apache.pulsar.broker.PulsarServerException; |
| import org.apache.pulsar.broker.PulsarService; |
| import org.apache.pulsar.broker.loadbalance.impl.PulsarResourceDescription; |
| import org.apache.pulsar.broker.loadbalance.impl.SimpleResourceUnit; |
| import org.apache.pulsar.common.naming.ServiceUnitId; |
| import org.apache.pulsar.common.stats.Metrics; |
| import org.apache.pulsar.common.util.ObjectMapperFactory; |
| import org.apache.pulsar.policies.data.loadbalancer.LoadManagerReport; |
| import org.apache.pulsar.policies.data.loadbalancer.LocalBrokerData; |
| import org.apache.pulsar.policies.data.loadbalancer.ServiceLookupData; |
| import org.apache.pulsar.zookeeper.ZooKeeperCache.Deserializer; |
| import org.apache.zookeeper.CreateMode; |
| import org.apache.zookeeper.KeeperException.NoNodeException; |
| import org.apache.zookeeper.ZooDefs; |
| import org.apache.zookeeper.ZooKeeper; |
| |
| public class NoopLoadManager implements LoadManager { |
| |
| private PulsarService pulsar; |
| private String lookupServiceAddress; |
| private ResourceUnit localResourceUnit; |
| private ZooKeeper zkClient; |
| |
| LocalBrokerData localData; |
| |
| private static final Deserializer<LocalBrokerData> loadReportDeserializer = (key, content) -> ObjectMapperFactory |
| .getThreadLocal() |
| .readValue(content, LocalBrokerData.class); |
| |
| @Override |
| public void initialize(PulsarService pulsar) { |
| this.pulsar = pulsar; |
| } |
| |
| @Override |
| public void start() throws PulsarServerException { |
| lookupServiceAddress = pulsar.getAdvertisedAddress() + ":" |
| + pulsar.getConfiguration().getWebServicePort().get(); |
| localResourceUnit = new SimpleResourceUnit(String.format("http://%s", lookupServiceAddress), |
| new PulsarResourceDescription()); |
| zkClient = pulsar.getZkClient(); |
| |
| localData = new LocalBrokerData(pulsar.getSafeWebServiceAddress(), pulsar.getWebServiceAddressTls(), |
| pulsar.getSafeBrokerServiceUrl(), pulsar.getBrokerServiceUrlTls()); |
| localData.setProtocols(pulsar.getProtocolDataToAdvertise()); |
| String brokerZnodePath = LoadManager.LOADBALANCE_BROKERS_ROOT + "/" + lookupServiceAddress; |
| |
| try { |
| // When running in standalone, this error can happen when killing the "standalone" process |
| // ungracefully since the ZK session will not be closed and it will take some time for ZK server |
| // to prune the expired sessions after startup. |
| // Since there's a single broker instance running, it's safe, in this mode, to remove the old lock |
| |
| // Delete and recreate z-node |
| try { |
| if (zkClient.exists(brokerZnodePath, null) != null) { |
| zkClient.delete(brokerZnodePath, -1); |
| } |
| } catch (NoNodeException nne) { |
| // Ignore if z-node was just expired |
| } |
| |
| ZkUtils.createFullPathOptimistic(zkClient, brokerZnodePath, localData.getJsonBytes(), |
| ZooDefs.Ids.OPEN_ACL_UNSAFE, CreateMode.EPHEMERAL); |
| |
| } catch (Exception e) { |
| throw new PulsarServerException(e); |
| } |
| } |
| |
| @Override |
| public boolean isCentralized() { |
| return false; |
| } |
| |
| @Override |
| public Optional<ResourceUnit> getLeastLoaded(ServiceUnitId su) throws Exception { |
| return Optional.of(localResourceUnit); |
| } |
| |
| @Override |
| public LoadManagerReport generateLoadReport() throws Exception { |
| return null; |
| } |
| |
| @Override |
| public Deserializer<? extends ServiceLookupData> getLoadReportDeserializer() { |
| return loadReportDeserializer; |
| } |
| |
| @Override |
| public void setLoadReportForceUpdateFlag() { |
| // do nothing |
| } |
| |
| @Override |
| public void writeLoadReportOnZookeeper() throws Exception { |
| // do nothing |
| } |
| |
| @Override |
| public void writeResourceQuotasToZooKeeper() throws Exception { |
| // do nothing |
| } |
| |
| @Override |
| public List<Metrics> getLoadBalancingMetrics() { |
| return Collections.emptyList(); |
| } |
| |
| @Override |
| public void doLoadShedding() { |
| // do nothing |
| } |
| |
| @Override |
| public void doNamespaceBundleSplit() throws Exception { |
| // do nothing |
| } |
| |
| @Override |
| public void disableBroker() throws Exception { |
| // do nothing |
| } |
| |
| @Override |
| public Set<String> getAvailableBrokers() throws Exception { |
| return Collections.singleton(lookupServiceAddress); |
| } |
| |
| @Override |
| public void stop() throws PulsarServerException { |
| // do nothing |
| } |
| |
| } |