| /* |
| * 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.schema.source; |
| |
| import org.apache.iotdb.commons.exception.runtime.SchemaExecutionException; |
| import org.apache.iotdb.commons.path.PartialPath; |
| import org.apache.iotdb.commons.path.PathPatternTree; |
| import org.apache.iotdb.db.queryengine.common.header.ColumnHeader; |
| import org.apache.iotdb.db.queryengine.common.header.ColumnHeaderConstant; |
| import org.apache.iotdb.db.schemaengine.schemaregion.ISchemaRegion; |
| import org.apache.iotdb.db.schemaengine.schemaregion.read.req.SchemaRegionReadPlanFactory; |
| import org.apache.iotdb.db.schemaengine.schemaregion.read.resp.info.IDeviceSchemaInfo; |
| import org.apache.iotdb.db.schemaengine.schemaregion.read.resp.reader.ISchemaReader; |
| import org.apache.iotdb.tsfile.common.conf.TSFileConfig; |
| import org.apache.iotdb.tsfile.read.common.block.TsBlockBuilder; |
| import org.apache.iotdb.tsfile.utils.Binary; |
| |
| import com.google.common.util.concurrent.ListenableFuture; |
| |
| import java.util.Iterator; |
| import java.util.List; |
| import java.util.NoSuchElementException; |
| |
| public class PathsUsingTemplateSource implements ISchemaSource<IDeviceSchemaInfo> { |
| |
| private final List<PartialPath> pathPatternList; |
| private final PathPatternTree scope; |
| |
| private final int templateId; |
| |
| PathsUsingTemplateSource( |
| List<PartialPath> pathPatternList, int templateId, PathPatternTree scope) { |
| this.pathPatternList = pathPatternList; |
| this.templateId = templateId; |
| this.scope = scope; |
| } |
| |
| @Override |
| public ISchemaReader<IDeviceSchemaInfo> getSchemaReader(ISchemaRegion schemaRegion) { |
| return new DevicesUsingTemplateReader(pathPatternList.iterator(), schemaRegion); |
| } |
| |
| @Override |
| public List<ColumnHeader> getInfoQueryColumnHeaders() { |
| return ColumnHeaderConstant.showPathsUsingTemplateHeaders; |
| } |
| |
| @Override |
| public void transformToTsBlockColumns( |
| IDeviceSchemaInfo device, TsBlockBuilder builder, String database) { |
| builder.getTimeColumnBuilder().writeLong(0L); |
| builder |
| .getColumnBuilder(0) |
| .writeBinary(new Binary(device.getFullPath(), TSFileConfig.STRING_CHARSET)); |
| builder.declarePosition(); |
| } |
| |
| @Override |
| public boolean hasSchemaStatistic(ISchemaRegion schemaRegion) { |
| return false; |
| } |
| |
| @Override |
| public long getSchemaStatistic(ISchemaRegion schemaRegion) { |
| return schemaRegion.getSchemaRegionStatistics().getTemplateActivatedNumber(); |
| } |
| |
| private class DevicesUsingTemplateReader implements ISchemaReader<IDeviceSchemaInfo> { |
| |
| final Iterator<PartialPath> pathPatternIterator; |
| |
| final ISchemaRegion schemaRegion; |
| |
| private Throwable throwable; |
| |
| ISchemaReader<IDeviceSchemaInfo> currentDeviceReader; |
| |
| DevicesUsingTemplateReader( |
| Iterator<PartialPath> pathPatternIterator, ISchemaRegion schemaRegion) { |
| this.pathPatternIterator = pathPatternIterator; |
| this.schemaRegion = schemaRegion; |
| this.throwable = null; |
| } |
| |
| @Override |
| public void close() throws Exception { |
| if (currentDeviceReader != null) { |
| currentDeviceReader.close(); |
| } |
| } |
| |
| @Override |
| public ListenableFuture<?> isBlocked() { |
| return NOT_BLOCKED; |
| } |
| |
| @Override |
| public boolean hasNext() { |
| try { |
| if (throwable != null) { |
| return false; |
| } |
| if (currentDeviceReader != null) { |
| if (currentDeviceReader.hasNext()) { |
| return true; |
| } else { |
| currentDeviceReader.close(); |
| if (!currentDeviceReader.isSuccess()) { |
| throwable = currentDeviceReader.getFailure(); |
| return false; |
| } |
| } |
| } |
| |
| while (pathPatternIterator.hasNext()) { |
| currentDeviceReader = |
| schemaRegion.getDeviceReader( |
| SchemaRegionReadPlanFactory.getShowDevicesPlan( |
| pathPatternIterator.next(), 0, 0, false, templateId, scope)); |
| if (currentDeviceReader.hasNext()) { |
| return true; |
| } else { |
| currentDeviceReader.close(); |
| } |
| } |
| return false; |
| } catch (Exception e) { |
| throw new SchemaExecutionException(e.getMessage(), e); |
| } |
| } |
| |
| @Override |
| public IDeviceSchemaInfo next() { |
| if (!hasNext()) { |
| throw new NoSuchElementException(); |
| } |
| return currentDeviceReader.next(); |
| } |
| |
| @Override |
| public boolean isSuccess() { |
| return throwable == null && (currentDeviceReader == null || currentDeviceReader.isSuccess()); |
| } |
| |
| @Override |
| public Throwable getFailure() { |
| if (throwable != null) { |
| return throwable; |
| } else if (currentDeviceReader != null) { |
| return currentDeviceReader.getFailure(); |
| } else { |
| return null; |
| } |
| } |
| } |
| } |