| /* |
| * 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.iotdb.db.consensus.statemachine.schemaregion; |
| |
| import org.apache.iotdb.common.rpc.thrift.TSStatus; |
| import org.apache.iotdb.commons.conf.CommonDescriptor; |
| import org.apache.iotdb.commons.consensus.ConsensusGroupId; |
| import org.apache.iotdb.consensus.common.DataSet; |
| import org.apache.iotdb.consensus.common.request.IConsensusRequest; |
| import org.apache.iotdb.consensus.ratis.utils.Utils; |
| import org.apache.iotdb.db.conf.IoTDBDescriptor; |
| import org.apache.iotdb.db.consensus.statemachine.BaseStateMachine; |
| import org.apache.iotdb.db.pipe.agent.PipeAgent; |
| import org.apache.iotdb.db.pipe.extractor.schemaregion.SchemaRegionListeningQueue; |
| import org.apache.iotdb.db.queryengine.execution.fragment.FragmentInstanceManager; |
| import org.apache.iotdb.db.queryengine.plan.planner.plan.FragmentInstance; |
| import org.apache.iotdb.db.queryengine.plan.planner.plan.node.PlanNode; |
| import org.apache.iotdb.db.schemaengine.schemaregion.ISchemaRegion; |
| import org.apache.iotdb.db.tools.schema.SchemaRegionSnapshotParser; |
| import org.apache.iotdb.rpc.TSStatusCode; |
| |
| import org.apache.tsfile.utils.Pair; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.io.File; |
| import java.nio.file.Path; |
| import java.util.Objects; |
| |
| public class SchemaRegionStateMachine extends BaseStateMachine { |
| |
| private static final Logger logger = LoggerFactory.getLogger(SchemaRegionStateMachine.class); |
| |
| private final ISchemaRegion schemaRegion; |
| private static final FragmentInstanceManager QUERY_INSTANCE_MANAGER = |
| FragmentInstanceManager.getInstance(); |
| |
| public SchemaRegionStateMachine(ISchemaRegion schemaRegion) { |
| this.schemaRegion = schemaRegion; |
| } |
| |
| @Override |
| public void start() { |
| // Do nothing |
| } |
| |
| @Override |
| public void stop() { |
| // Stop leader related service for schema pipe |
| PipeAgent.runtime().notifySchemaLeaderUnavailable(schemaRegion.getSchemaRegionId()); |
| } |
| |
| @Override |
| public void notifyLeaderChanged(ConsensusGroupId groupId, int newLeaderId) { |
| if (schemaRegion.getSchemaRegionId().equals(groupId) |
| && newLeaderId != IoTDBDescriptor.getInstance().getConfig().getDataNodeId()) { |
| logger.info( |
| "Current node [nodeId: {}] is no longer the schema region leader [regionId: {}], " |
| + "the new leader is [nodeId:{}]", |
| IoTDBDescriptor.getInstance().getConfig().getDataNodeId(), |
| schemaRegion.getSchemaRegionId(), |
| newLeaderId); |
| |
| // Shutdown leader related service for schema pipe |
| PipeAgent.runtime().notifySchemaLeaderUnavailable(schemaRegion.getSchemaRegionId()); |
| |
| logger.info( |
| "Current node [nodeId: {}] is no longer the schema region leader [regionId: {}], " |
| + "all services on old leader are unavailable now.", |
| IoTDBDescriptor.getInstance().getConfig().getDataNodeId(), |
| schemaRegion.getSchemaRegionId()); |
| } |
| } |
| |
| @Override |
| public void notifyLeaderReady() { |
| logger.info( |
| "Current node [nodeId: {}] becomes schema region leader [regionId: {}]", |
| IoTDBDescriptor.getInstance().getConfig().getDataNodeId(), |
| schemaRegion.getSchemaRegionId()); |
| |
| // Activate leader related service for schema pipe |
| PipeAgent.runtime().notifySchemaLeaderReady(schemaRegion.getSchemaRegionId()); |
| |
| logger.info( |
| "Current node [nodeId: {}] as schema region leader [regionId: {}] is ready to work", |
| IoTDBDescriptor.getInstance().getConfig().getDataNodeId(), |
| schemaRegion.getSchemaRegionId()); |
| } |
| |
| @Override |
| public boolean isReadOnly() { |
| return CommonDescriptor.getInstance().getConfig().isReadOnly(); |
| } |
| |
| @Override |
| public boolean takeSnapshot(File snapshotDir) { |
| if (schemaRegion.createSnapshot(snapshotDir) |
| && PipeAgent.runtime() |
| .schemaListener(schemaRegion.getSchemaRegionId()) |
| .createSnapshot(snapshotDir)) { |
| listen2Snapshot4PipeListener(true); |
| return true; |
| } |
| return false; |
| } |
| |
| @Override |
| public void loadSnapshot(File latestSnapshotRootDir) { |
| schemaRegion.loadSnapshot(latestSnapshotRootDir); |
| PipeAgent.runtime() |
| .schemaListener(schemaRegion.getSchemaRegionId()) |
| .loadSnapshot(latestSnapshotRootDir); |
| // We recompute the snapshot for pipe listener when loading snapshot |
| // to recover the newest snapshot in cache |
| listen2Snapshot4PipeListener(false); |
| } |
| |
| public void listen2Snapshot4PipeListener(boolean isTmp) { |
| Pair<Path, Path> snapshotPaths = |
| SchemaRegionSnapshotParser.getSnapshotPaths( |
| Utils.fromConsensusGroupIdToRaftGroupId(schemaRegion.getSchemaRegionId()) |
| .getUuid() |
| .toString(), |
| isTmp); |
| SchemaRegionListeningQueue listener = |
| PipeAgent.runtime().schemaListener(schemaRegion.getSchemaRegionId()); |
| if (Objects.isNull(snapshotPaths) || Objects.isNull(snapshotPaths.getLeft())) { |
| if (listener.isOpened()) { |
| logger.warn( |
| "Schema Region Listening Queue Listen to snapshot failed, the historical data may not be transferred. snapshotPaths:{}", |
| snapshotPaths); |
| } |
| return; |
| } |
| listener.tryListenToSnapshot( |
| snapshotPaths.getLeft().toString(), |
| // Transfer tLogSnapshot iff it exists and is non-empty |
| Objects.nonNull(snapshotPaths.getRight()) && snapshotPaths.getRight().toFile().length() > 0 |
| ? snapshotPaths.getRight().toString() |
| : null, |
| schemaRegion.getDatabaseFullPath()); |
| } |
| |
| @Override |
| public TSStatus write(IConsensusRequest request) { |
| try { |
| TSStatus result = ((PlanNode) request).accept(new SchemaExecutionVisitor(), schemaRegion); |
| if (result.getCode() == TSStatusCode.SUCCESS_STATUS.getStatusCode()) { |
| PipeAgent.runtime() |
| .schemaListener(schemaRegion.getSchemaRegionId()) |
| .tryListenToNode((PlanNode) request); |
| } |
| return result; |
| } catch (IllegalArgumentException e) { |
| logger.error(e.getMessage(), e); |
| return new TSStatus(TSStatusCode.INTERNAL_SERVER_ERROR.getStatusCode()); |
| } |
| } |
| |
| @Override |
| public DataSet read(IConsensusRequest request) { |
| FragmentInstance fragmentInstance; |
| try { |
| fragmentInstance = getFragmentInstance(request); |
| } catch (IllegalArgumentException e) { |
| logger.error(e.getMessage()); |
| return null; |
| } |
| logger.debug( |
| "SchemaRegionStateMachine[{}]: Execute read plan: FragmentInstance-{}", |
| schemaRegion.getSchemaRegionId(), |
| fragmentInstance.getId()); |
| return QUERY_INSTANCE_MANAGER.execSchemaQueryFragmentInstance(fragmentInstance, schemaRegion); |
| } |
| } |