| /* |
| * 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.confignode.procedure.impl.node; |
| |
| import org.apache.iotdb.common.rpc.thrift.TConfigNodeLocation; |
| import org.apache.iotdb.commons.exception.runtime.ThriftSerDeException; |
| import org.apache.iotdb.commons.utils.ThriftConfigNodeSerDeUtils; |
| import org.apache.iotdb.confignode.procedure.env.ConfigNodeProcedureEnv; |
| import org.apache.iotdb.confignode.procedure.exception.ProcedureException; |
| import org.apache.iotdb.confignode.procedure.state.AddConfigNodeState; |
| import org.apache.iotdb.confignode.procedure.store.ProcedureType; |
| import org.apache.iotdb.confignode.rpc.thrift.TNodeVersionInfo; |
| import org.apache.iotdb.tsfile.utils.ReadWriteIOUtils; |
| |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.io.DataOutputStream; |
| import java.io.IOException; |
| import java.nio.ByteBuffer; |
| import java.util.Objects; |
| |
| /** add config node procedure */ |
| public class AddConfigNodeProcedure extends AbstractNodeProcedure<AddConfigNodeState> { |
| private static final Logger LOG = LoggerFactory.getLogger(AddConfigNodeProcedure.class); |
| private static final int RETRY_THRESHOLD = 5; |
| |
| private TConfigNodeLocation tConfigNodeLocation; |
| |
| private TNodeVersionInfo versionInfo; |
| |
| public AddConfigNodeProcedure() { |
| super(); |
| } |
| |
| public AddConfigNodeProcedure( |
| TConfigNodeLocation tConfigNodeLocation, TNodeVersionInfo versionInfo) { |
| super(); |
| this.tConfigNodeLocation = tConfigNodeLocation; |
| this.versionInfo = versionInfo; |
| } |
| |
| @Override |
| protected Flow executeFromState(ConfigNodeProcedureEnv env, AddConfigNodeState state) { |
| if (tConfigNodeLocation == null) { |
| return Flow.NO_MORE_STATE; |
| } |
| try { |
| switch (state) { |
| case ADD_CONFIG_NODE_PREPARE: |
| setNextState(AddConfigNodeState.CREATE_PEER); |
| break; |
| case CREATE_PEER: |
| LOG.info("Executing CREATE_PEER on {}...", tConfigNodeLocation); |
| env.addConsensusGroup(tConfigNodeLocation); |
| setNextState(AddConfigNodeState.ADD_PEER); |
| LOG.info("Successfully CREATE_PEER on {}", tConfigNodeLocation); |
| break; |
| case ADD_PEER: |
| LOG.info("Executing ADD_PEER {}...", tConfigNodeLocation); |
| env.addConfigNodePeer(tConfigNodeLocation); |
| setNextState(AddConfigNodeState.REGISTER_SUCCESS); |
| LOG.info("Successfully ADD_PEER {}", tConfigNodeLocation); |
| break; |
| case REGISTER_SUCCESS: |
| env.notifyRegisterSuccess(tConfigNodeLocation); |
| env.applyConfigNode(tConfigNodeLocation, versionInfo); |
| // TODO: Add a force heartbeat to update LoadCache immediately |
| LOG.info("The ConfigNode: {} is successfully added to the cluster", tConfigNodeLocation); |
| return Flow.NO_MORE_STATE; |
| } |
| } catch (Exception e) { |
| if (isRollbackSupported(state)) { |
| setFailure(new ProcedureException("Add ConfigNode failed " + state)); |
| } else { |
| LOG.error( |
| "Retrievable error trying to add config node {}, state {}", |
| tConfigNodeLocation, |
| state, |
| e); |
| if (getCycles() > RETRY_THRESHOLD) { |
| setFailure(new ProcedureException("State stuck at " + state)); |
| } |
| } |
| } |
| return Flow.HAS_MORE_STATE; |
| } |
| |
| @Override |
| protected void rollbackState(ConfigNodeProcedureEnv env, AddConfigNodeState state) |
| throws ProcedureException { |
| switch (state) { |
| case CREATE_PEER: |
| env.deleteConfigNodePeer(tConfigNodeLocation); |
| LOG.info("Rollback CREATE_PEER for: {}", tConfigNodeLocation); |
| break; |
| case ADD_PEER: |
| env.removeConfigNodePeer(tConfigNodeLocation); |
| LOG.info("Rollback ADD_PEER for: {}", tConfigNodeLocation); |
| break; |
| default: |
| break; |
| } |
| } |
| |
| @Override |
| protected boolean isRollbackSupported(AddConfigNodeState state) { |
| switch (state) { |
| case CREATE_PEER: |
| case ADD_PEER: |
| return true; |
| default: |
| return false; |
| } |
| } |
| |
| @Override |
| protected AddConfigNodeState getState(int stateId) { |
| return AddConfigNodeState.values()[stateId]; |
| } |
| |
| @Override |
| protected int getStateId(AddConfigNodeState deleteStorageGroupState) { |
| return deleteStorageGroupState.ordinal(); |
| } |
| |
| @Override |
| protected AddConfigNodeState getInitialState() { |
| return AddConfigNodeState.ADD_CONFIG_NODE_PREPARE; |
| } |
| |
| @Override |
| public void serialize(DataOutputStream stream) throws IOException { |
| stream.writeShort(ProcedureType.ADD_CONFIG_NODE_PROCEDURE.getTypeCode()); |
| super.serialize(stream); |
| ThriftConfigNodeSerDeUtils.serializeTConfigNodeLocation(tConfigNodeLocation, stream); |
| ReadWriteIOUtils.write(versionInfo.getVersion(), stream); |
| ReadWriteIOUtils.write(versionInfo.getBuildInfo(), stream); |
| } |
| |
| @Override |
| public void deserialize(ByteBuffer byteBuffer) { |
| super.deserialize(byteBuffer); |
| try { |
| tConfigNodeLocation = ThriftConfigNodeSerDeUtils.deserializeTConfigNodeLocation(byteBuffer); |
| // old version may not have version info, |
| // thus we need to check inputStream before deserialize. |
| if (byteBuffer.hasRemaining()) { |
| versionInfo = |
| new TNodeVersionInfo( |
| ReadWriteIOUtils.readString(byteBuffer), ReadWriteIOUtils.readString(byteBuffer)); |
| } else { |
| versionInfo = new TNodeVersionInfo("Unknown", "Unknown"); |
| } |
| } catch (ThriftSerDeException e) { |
| LOG.error("Error in deserialize AddConfigNodeProcedure", e); |
| } |
| } |
| |
| @Override |
| public boolean equals(Object that) { |
| if (that instanceof AddConfigNodeProcedure) { |
| AddConfigNodeProcedure thatProc = (AddConfigNodeProcedure) that; |
| return thatProc.getProcId() == this.getProcId() |
| && thatProc.getState() == this.getState() |
| && thatProc.tConfigNodeLocation.equals(this.tConfigNodeLocation) |
| && thatProc.versionInfo.equals(this.versionInfo); |
| } |
| return false; |
| } |
| |
| @Override |
| public int hashCode() { |
| return Objects.hash(this.tConfigNodeLocation, this.versionInfo); |
| } |
| } |