| /* |
| * 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.queryengine.execution.operator.process.last; |
| |
| import org.apache.iotdb.commons.path.MeasurementPath; |
| import org.apache.iotdb.db.queryengine.execution.driver.DataDriverContext; |
| import org.apache.iotdb.db.queryengine.execution.fragment.DataNodeQueryContext; |
| import org.apache.iotdb.db.queryengine.execution.operator.Operator; |
| import org.apache.iotdb.db.queryengine.execution.operator.OperatorContext; |
| import org.apache.iotdb.db.queryengine.execution.operator.process.ProcessOperator; |
| import org.apache.iotdb.db.queryengine.plan.analyze.cache.schema.DataNodeSchemaCache; |
| import org.apache.iotdb.tsfile.file.metadata.enums.TSDataType; |
| import org.apache.iotdb.tsfile.read.TimeValuePair; |
| import org.apache.iotdb.tsfile.read.common.block.TsBlock; |
| import org.apache.iotdb.tsfile.read.common.block.TsBlockBuilder; |
| import org.apache.iotdb.tsfile.utils.Pair; |
| import org.apache.iotdb.tsfile.utils.TsPrimitiveType; |
| |
| import com.google.common.collect.ImmutableList; |
| import com.google.common.util.concurrent.ListenableFuture; |
| |
| import javax.annotation.Nullable; |
| |
| import java.util.concurrent.atomic.AtomicInteger; |
| |
| public abstract class AbstractUpdateLastCacheOperator implements ProcessOperator { |
| protected static final TsBlock LAST_QUERY_EMPTY_TSBLOCK = |
| new TsBlockBuilder(ImmutableList.of(TSDataType.TEXT, TSDataType.TEXT, TSDataType.TEXT)) |
| .build(); |
| |
| protected OperatorContext operatorContext; |
| |
| protected final DataNodeQueryContext dataNodeQueryContext; |
| |
| protected Operator child; |
| |
| protected DataNodeSchemaCache lastCache; |
| |
| protected final boolean needUpdateCache; |
| |
| protected final boolean needUpdateNullEntry; |
| |
| protected TsBlockBuilder tsBlockBuilder; |
| |
| protected String databaseName; |
| |
| protected AbstractUpdateLastCacheOperator( |
| OperatorContext operatorContext, |
| Operator child, |
| DataNodeSchemaCache dataNodeSchemaCache, |
| boolean needUpdateCache, |
| boolean needUpdateNullEntry) { |
| this.operatorContext = operatorContext; |
| this.child = child; |
| this.lastCache = dataNodeSchemaCache; |
| this.needUpdateCache = needUpdateCache; |
| this.needUpdateNullEntry = needUpdateNullEntry; |
| this.tsBlockBuilder = LastQueryUtil.createTsBlockBuilder(1); |
| this.dataNodeQueryContext = |
| operatorContext.getDriverContext().getFragmentInstanceContext().getDataNodeQueryContext(); |
| } |
| |
| @Override |
| public OperatorContext getOperatorContext() { |
| return operatorContext; |
| } |
| |
| @Override |
| public ListenableFuture<?> isBlocked() { |
| return child.isBlocked(); |
| } |
| |
| protected String getDatabaseName() { |
| if (databaseName == null) { |
| databaseName = |
| ((DataDriverContext) operatorContext.getDriverContext()) |
| .getDataRegion() |
| .getDatabaseName(); |
| } |
| return databaseName; |
| } |
| |
| protected void mayUpdateLastCache( |
| long time, @Nullable TsPrimitiveType value, MeasurementPath fullPath) { |
| if (!needUpdateCache) { |
| return; |
| } |
| try { |
| dataNodeQueryContext.lock(); |
| Pair<AtomicInteger, TimeValuePair> seriesScanInfo = |
| dataNodeQueryContext.getSeriesScanInfo(fullPath); |
| |
| // may enter this case when use TTL |
| if (seriesScanInfo == null) { |
| return; |
| } |
| |
| // update cache in DataNodeQueryContext |
| if (seriesScanInfo.right == null || time > seriesScanInfo.right.getTimestamp()) { |
| seriesScanInfo.right = new TimeValuePair(time, value); |
| } |
| |
| if (seriesScanInfo.left.decrementAndGet() == 0) { |
| lastCache.updateLastCache( |
| getDatabaseName(), fullPath, seriesScanInfo.right, false, Long.MIN_VALUE); |
| } |
| } finally { |
| dataNodeQueryContext.unLock(); |
| } |
| } |
| |
| @Override |
| public boolean hasNext() throws Exception { |
| return child.hasNextWithTimer(); |
| } |
| |
| @Override |
| public boolean isFinished() throws Exception { |
| return child.isFinished(); |
| } |
| |
| @Override |
| public void close() throws Exception { |
| child.close(); |
| } |
| |
| @Override |
| public long calculateMaxPeekMemory() { |
| return child.calculateMaxPeekMemory(); |
| } |
| |
| @Override |
| public long calculateMaxReturnSize() { |
| return child.calculateMaxReturnSize(); |
| } |
| |
| @Override |
| public long calculateRetainedSizeAfterCallingNext() { |
| return child.calculateRetainedSizeAfterCallingNext(); |
| } |
| } |