wchevreuil commented on a change in pull request #4030: URL: https://github.com/apache/hbase/pull/4030#discussion_r791951333
########## File path: hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/storefiletracker/ModifyStoreFileTrackerProcedure.java ########## @@ -0,0 +1,271 @@ +/** + * 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.hadoop.hbase.regionserver.storefiletracker; + +import java.io.IOException; +import java.util.function.BiConsumer; +import java.util.function.Consumer; +import org.apache.hadoop.conf.Configuration; +import org.apache.hadoop.hbase.DoNotRetryIOException; +import org.apache.hadoop.hbase.HBaseIOException; +import org.apache.hadoop.hbase.TableName; +import org.apache.hadoop.hbase.TableNotEnabledException; +import org.apache.hadoop.hbase.TableNotFoundException; +import org.apache.hadoop.hbase.client.TableDescriptor; +import org.apache.hadoop.hbase.master.procedure.AbstractStateMachineTableProcedure; +import org.apache.hadoop.hbase.master.procedure.MasterProcedureEnv; +import org.apache.hadoop.hbase.master.procedure.ModifyTableProcedure; +import org.apache.hadoop.hbase.procedure2.ProcedureStateSerializer; +import org.apache.hadoop.hbase.procedure2.ProcedureSuspendedException; +import org.apache.hadoop.hbase.procedure2.ProcedureYieldException; +import org.apache.yetus.audience.InterfaceAudience; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +import org.apache.hadoop.hbase.shaded.protobuf.ProtobufUtil; +import org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProcedureProtos.ModifyStoreFileTrackerState; +import org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProcedureProtos.ModifyStoreFileTrackerStateData; + +/** + * This procedure is used to change the store file tracker implementation. + * <p/> + * Typically we need to schedule two {@link ModifyTableProcedure} (or three if the table is already + * in {@code MIGRATION} but the {@code dstSFT} is not what we expected) to do this, so we introduce + * this procedure to simplify the work of our users. + */ [email protected] +public abstract class ModifyStoreFileTrackerProcedure + extends AbstractStateMachineTableProcedure<ModifyStoreFileTrackerState> { + + private static final Logger LOG = LoggerFactory.getLogger(ModifyStoreFileTrackerProcedure.class); + + private TableName tableName; + + private String dstSFT; + + protected ModifyStoreFileTrackerProcedure() { + } + + protected ModifyStoreFileTrackerProcedure(MasterProcedureEnv env, TableName tableName, + String dstSFT) throws HBaseIOException { + super(env); + checkDstSFT(dstSFT); + this.tableName = tableName; + this.dstSFT = dstSFT; + preflightChecks(env, true); + } + + private void checkDstSFT(String dstSFT) throws DoNotRetryIOException { + if (MigrationStoreFileTracker.class + .isAssignableFrom(StoreFileTrackerFactory.getTrackerClass(dstSFT))) { + throw new DoNotRetryIOException("Do not need to transfer to " + dstSFT); + } + } + + @Override + public TableName getTableName() { + return tableName; + } + + @Override + public TableOperationType getTableOperationType() { + return TableOperationType.EDIT; + } + + private enum StoreFileTrackerState { + NEED_FINISH_PREVIOUS_MIGRATION_FIRST, NEED_START_MIGRATION, NEED_FINISH_MIGRATION, + ALREADY_FINISHED + } + + private StoreFileTrackerState checkState(Configuration conf, String dstSFT) { + // there are 4 possible conditions: + // 1. The table or family has already made use of the dstSFT. In this way we just finish the + // procedure. + // 2. The table or family is not using the dstSFT but also not using migration SFT, + // then we just go to the MODIFY_STORE_FILE_TRACKER_MIGRATION state. + // 3. The table or family has already been using migration SFT and the dst SFT is what we + // expect, just go to MODIFY_STORE_FILE_TRACKER_FINISH. + // 4. The table or family is using migration SFT and the dst SFT is not what we + // expect, then need to schedule a MTP to change it to the dst SFT of the current migration + // SFT first, and then go to MODIFY_STORE_FILE_TRACKER_MIGRATION. + Class<? extends StoreFileTracker> clazz = StoreFileTrackerFactory.getTrackerClass(conf); + Class<? extends StoreFileTracker> dstSFTClass = StoreFileTrackerFactory.getTrackerClass(dstSFT); + if (clazz.equals(dstSFTClass)) { + return StoreFileTrackerState.ALREADY_FINISHED; + } + if (!MigrationStoreFileTracker.class.isAssignableFrom(clazz)) { + return StoreFileTrackerState.NEED_START_MIGRATION; + } + Class<? extends StoreFileTracker> currentDstSFT = StoreFileTrackerFactory + .getStoreFileTrackerClassForMigration(conf, MigrationStoreFileTracker.DST_IMPL); + if (currentDstSFT.equals(dstSFTClass)) { + return StoreFileTrackerState.NEED_FINISH_MIGRATION; + } else { + return StoreFileTrackerState.NEED_FINISH_PREVIOUS_MIGRATION_FIRST; + } + } + + private final String getRestoreSFT(Configuration conf) { + Class<? extends StoreFileTracker> currentDstSFT = StoreFileTrackerFactory + .getStoreFileTrackerClassForMigration(conf, MigrationStoreFileTracker.DST_IMPL); + return StoreFileTrackerFactory.getStoreFileTrackerName(currentDstSFT); + } + + protected abstract void preCheck(TableDescriptor current) throws IOException; + + protected abstract Configuration createConf(Configuration conf, TableDescriptor current); + + protected abstract TableDescriptor createRestoreTableDescriptor(TableDescriptor current, + String restoreSFT); + + private Flow preCheckAndTryRestoreSFT(MasterProcedureEnv env) throws IOException { + // Checks whether the table exists + if (!env.getMasterServices().getTableDescriptors().exists(getTableName())) { + throw new TableNotFoundException(getTableName()); + } + if (!isTableEnabled(env)) { + throw new TableNotEnabledException(tableName); + } + TableDescriptor current = env.getMasterServices().getTableDescriptors().get(tableName); + preCheck(current); + Configuration conf = createConf(env.getMasterConfiguration(), current); + StoreFileTrackerState state = checkState(conf, dstSFT); + switch (state) { + case NEED_FINISH_PREVIOUS_MIGRATION_FIRST: + TableDescriptor td = createRestoreTableDescriptor(current, getRestoreSFT(conf)); Review comment: No, I think if no two MTPs can run concurrently, this is safe enough. -- This is an automated message from the Apache Git Service. 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