| /* |
| * 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.tephra.hbase.txprune; |
| |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| import org.apache.hadoop.hbase.TableName; |
| import org.apache.hadoop.hbase.client.HTableInterface; |
| import org.apache.hadoop.hbase.coprocessor.RegionCoprocessorEnvironment; |
| import org.apache.hadoop.hbase.regionserver.compactions.CompactionRequest; |
| import org.apache.tephra.Transaction; |
| import org.apache.tephra.persist.TransactionVisibilityState; |
| import org.apache.tephra.util.TxUtils; |
| |
| import java.io.IOException; |
| import javax.annotation.Nullable; |
| |
| /** |
| * Record compaction state for invalid list pruning |
| */ |
| public class CompactionState { |
| private static final Log LOG = LogFactory.getLog(CompactionState.class); |
| |
| private final byte[] regionName; |
| private final String regionNameAsString; |
| private final PruneUpperBoundWriterSupplier pruneUpperBoundWriterSupplier; |
| private final PruneUpperBoundWriter pruneUpperBoundWriter; |
| |
| private volatile long pruneUpperBound = -1; |
| |
| public CompactionState(final RegionCoprocessorEnvironment env, final TableName stateTable, long pruneFlushInterval) { |
| this.regionName = env.getRegion().getRegionName(); |
| this.regionNameAsString = env.getRegion().getRegionNameAsString(); |
| DataJanitorState dataJanitorState = new DataJanitorState(new DataJanitorState.TableSupplier() { |
| @Override |
| public HTableInterface get() throws IOException { |
| return env.getTable(stateTable); |
| } |
| }); |
| this.pruneUpperBoundWriterSupplier = new PruneUpperBoundWriterSupplier(stateTable, dataJanitorState, |
| pruneFlushInterval); |
| this.pruneUpperBoundWriter = pruneUpperBoundWriterSupplier.get(); |
| } |
| |
| /** |
| * Records the transaction state used for a compaction. This method is called when the compaction starts. |
| * |
| * @param request {@link CompactionRequest} for the compaction |
| * @param snapshot transaction state that will be used for the compaction |
| */ |
| public void record(CompactionRequest request, @Nullable TransactionVisibilityState snapshot) { |
| if (request.isMajor() && snapshot != null) { |
| Transaction tx = TxUtils.createDummyTransaction(snapshot); |
| pruneUpperBound = TxUtils.getPruneUpperBound(tx); |
| if (LOG.isDebugEnabled()) { |
| LOG.debug( |
| String.format("Computed prune upper bound %s for compaction request %s using transaction state from time %s", |
| pruneUpperBound, request, snapshot.getTimestamp())); |
| } |
| } else { |
| pruneUpperBound = -1; |
| } |
| } |
| |
| /** |
| * Persists the transaction state recorded by {@link #record(CompactionRequest, TransactionVisibilityState)}. |
| * This method is called after the compaction has successfully completed. |
| */ |
| public void persist() { |
| if (pruneUpperBound != -1) { |
| pruneUpperBoundWriter.persistPruneEntry(regionName, pruneUpperBound); |
| if (LOG.isDebugEnabled()) { |
| LOG.debug(String.format("Enqueued prune upper bound %s for region %s", pruneUpperBound, regionNameAsString)); |
| } |
| } |
| } |
| |
| /** |
| * Persist that the given region is empty at the given time |
| * @param time time in milliseconds |
| */ |
| public void persistRegionEmpty(long time) { |
| pruneUpperBoundWriter.persistRegionEmpty(regionName, time); |
| if (LOG.isDebugEnabled()) { |
| LOG.debug(String.format("Enqueued empty region %s at time %s", regionNameAsString, time)); |
| } |
| } |
| |
| /** |
| * Releases the usage {@link PruneUpperBoundWriter}. |
| */ |
| public void stop() { |
| pruneUpperBoundWriterSupplier.release(); |
| } |
| } |