| /* |
| * 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.shardingsphere.elasticjob.lite.internal.failover; |
| |
| import org.apache.shardingsphere.elasticjob.infra.handler.sharding.JobInstance; |
| import org.apache.shardingsphere.elasticjob.infra.pojo.JobConfigurationPOJO; |
| import org.apache.shardingsphere.elasticjob.infra.yaml.YamlEngine; |
| import org.apache.shardingsphere.elasticjob.lite.internal.config.ConfigurationNode; |
| import org.apache.shardingsphere.elasticjob.lite.internal.config.ConfigurationService; |
| import org.apache.shardingsphere.elasticjob.lite.internal.instance.InstanceNode; |
| import org.apache.shardingsphere.elasticjob.lite.internal.instance.InstanceService; |
| import org.apache.shardingsphere.elasticjob.lite.internal.listener.AbstractListenerManager; |
| import org.apache.shardingsphere.elasticjob.lite.internal.schedule.JobRegistry; |
| import org.apache.shardingsphere.elasticjob.lite.internal.sharding.ExecutionService; |
| import org.apache.shardingsphere.elasticjob.lite.internal.sharding.ShardingService; |
| import org.apache.shardingsphere.elasticjob.reg.base.CoordinatorRegistryCenter; |
| import org.apache.shardingsphere.elasticjob.reg.listener.DataChangedEvent; |
| import org.apache.shardingsphere.elasticjob.reg.listener.DataChangedEvent.Type; |
| import org.apache.shardingsphere.elasticjob.reg.listener.DataChangedEventListener; |
| |
| import java.util.Collections; |
| import java.util.HashSet; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Map.Entry; |
| import java.util.Set; |
| |
| /** |
| * Failover listener manager. |
| */ |
| public final class FailoverListenerManager extends AbstractListenerManager { |
| |
| private final String jobName; |
| |
| private final ConfigurationService configService; |
| |
| private final ShardingService shardingService; |
| |
| private final FailoverService failoverService; |
| |
| private final ExecutionService executionService; |
| |
| private final InstanceService instanceService; |
| |
| private final ConfigurationNode configNode; |
| |
| private final InstanceNode instanceNode; |
| |
| public FailoverListenerManager(final CoordinatorRegistryCenter regCenter, final String jobName) { |
| super(regCenter, jobName); |
| this.jobName = jobName; |
| configService = new ConfigurationService(regCenter, jobName); |
| shardingService = new ShardingService(regCenter, jobName); |
| failoverService = new FailoverService(regCenter, jobName); |
| executionService = new ExecutionService(regCenter, jobName); |
| instanceService = new InstanceService(regCenter, jobName); |
| configNode = new ConfigurationNode(jobName); |
| instanceNode = new InstanceNode(jobName); |
| } |
| |
| @Override |
| public void start() { |
| addDataListener(new JobCrashedJobListener()); |
| addDataListener(new FailoverSettingsChangedJobListener()); |
| addDataListener(new LegacyCrashedRunningItemListener()); |
| } |
| |
| private boolean isFailoverEnabled() { |
| return configService.load(true).isFailover(); |
| } |
| |
| class JobCrashedJobListener implements DataChangedEventListener { |
| |
| @Override |
| public void onChange(final DataChangedEvent event) { |
| if (!JobRegistry.getInstance().isShutdown(jobName) && isFailoverEnabled() && Type.DELETED == event.getType() && instanceNode.isInstancePath(event.getKey())) { |
| String jobInstanceId = event.getKey().substring(instanceNode.getInstanceFullPath().length() + 1); |
| if (jobInstanceId.equals(JobRegistry.getInstance().getJobInstance(jobName).getJobInstanceId())) { |
| return; |
| } |
| List<Integer> failoverItems = failoverService.getFailoveringItems(jobInstanceId); |
| if (!failoverItems.isEmpty()) { |
| for (int each : failoverItems) { |
| failoverService.setCrashedFailoverFlagDirectly(each); |
| failoverService.failoverIfNecessary(); |
| } |
| } else { |
| for (int each : shardingService.getCrashedShardingItems(jobInstanceId)) { |
| failoverService.setCrashedFailoverFlag(each); |
| failoverService.failoverIfNecessary(); |
| } |
| } |
| } |
| } |
| } |
| |
| class FailoverSettingsChangedJobListener implements DataChangedEventListener { |
| |
| @Override |
| public void onChange(final DataChangedEvent event) { |
| if (configNode.isConfigPath(event.getKey()) && Type.UPDATED == event.getType() && !YamlEngine.unmarshal(event.getValue(), JobConfigurationPOJO.class).toJobConfiguration().isFailover()) { |
| failoverService.removeFailoverInfo(); |
| } |
| } |
| } |
| |
| class LegacyCrashedRunningItemListener implements DataChangedEventListener { |
| |
| @Override |
| public void onChange(final DataChangedEvent event) { |
| if (!isCurrentInstanceOnline(event) || !isFailoverEnabled()) { |
| return; |
| } |
| Set<JobInstance> availableJobInstances = new HashSet<>(instanceService.getAvailableJobInstances()); |
| if (!isTheOnlyInstance(availableJobInstances)) { |
| return; |
| } |
| Map<Integer, JobInstance> allRunningItems = executionService.getAllRunningItems(); |
| Map<Integer, JobInstance> allFailoveringItems = failoverService.getAllFailoveringItems(); |
| if (allRunningItems.isEmpty() && allFailoveringItems.isEmpty()) { |
| return; |
| } |
| for (Entry<Integer, JobInstance> entry : allFailoveringItems.entrySet()) { |
| if (!availableJobInstances.contains(entry.getValue())) { |
| int item = entry.getKey(); |
| failoverService.setCrashedFailoverFlagDirectly(item); |
| failoverService.clearFailoveringItem(item); |
| executionService.clearRunningInfo(Collections.singletonList(item)); |
| allRunningItems.remove(item); |
| } |
| } |
| for (Entry<Integer, JobInstance> entry : allRunningItems.entrySet()) { |
| if (!availableJobInstances.contains(entry.getValue())) { |
| failoverService.setCrashedFailoverFlag(entry.getKey()); |
| executionService.clearRunningInfo(Collections.singletonList(entry.getKey())); |
| } |
| } |
| failoverService.failoverIfNecessary(); |
| } |
| |
| private boolean isCurrentInstanceOnline(final DataChangedEvent event) { |
| return Type.ADDED == event.getType() && event.getKey().endsWith(instanceNode.getLocalInstancePath()); |
| } |
| |
| private boolean isTheOnlyInstance(final Set<JobInstance> availableJobInstances) { |
| return Collections.singleton(JobRegistry.getInstance().getJobInstance(jobName)).equals(availableJobInstances); |
| } |
| } |
| } |