vdiravka commented on a change in pull request #1627: DRILL-7014: Format plugin for LTSV files URL: https://github.com/apache/drill/pull/1627#discussion_r253824507
########## File path: contrib/format-ltsv/src/main/java/org/apache/drill/exec/store/ltsv/LTSVFormatPlugin.java ########## @@ -0,0 +1,82 @@ +/* + * 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.drill.exec.store.ltsv; + +import org.apache.drill.common.exceptions.ExecutionSetupException; +import org.apache.drill.common.expression.SchemaPath; +import org.apache.drill.common.logical.StoragePluginConfig; +import org.apache.drill.exec.ops.FragmentContext; +import org.apache.drill.exec.proto.UserBitShared; +import org.apache.drill.exec.server.DrillbitContext; +import org.apache.drill.exec.store.RecordReader; +import org.apache.drill.exec.store.RecordWriter; +import org.apache.drill.exec.store.dfs.DrillFileSystem; +import org.apache.drill.exec.store.dfs.easy.EasyFormatPlugin; +import org.apache.drill.exec.store.dfs.easy.EasyWriter; +import org.apache.drill.exec.store.dfs.easy.FileWork; +import org.apache.hadoop.conf.Configuration; + +import java.io.IOException; +import java.util.List; + +public class LTSVFormatPlugin extends EasyFormatPlugin<LTSVFormatPluginConfig> { + + private static final boolean IS_COMPRESSIBLE = false; + private static final String DEFAULT_NAME = "ltsv"; + private LTSVFormatPluginConfig config; + + private static final org.slf4j.Logger logger = org.slf4j.LoggerFactory.getLogger(LTSVFormatPlugin.class); + + public LTSVFormatPlugin(String name, DrillbitContext context, Configuration fsConf, StoragePluginConfig storageConfig) { + this(name, context, fsConf, storageConfig, new LTSVFormatPluginConfig()); + } + + public LTSVFormatPlugin(String name, DrillbitContext context, Configuration fsConf, StoragePluginConfig config, LTSVFormatPluginConfig formatPluginConfig) { + super(name, context, fsConf, config, formatPluginConfig, true, false, false, IS_COMPRESSIBLE, formatPluginConfig.getExtensions(), DEFAULT_NAME); + this.config = formatPluginConfig; + } + + @Override + public RecordReader getRecordReader(FragmentContext context, DrillFileSystem dfs, FileWork fileWork, + List<SchemaPath> columns, String userName) throws ExecutionSetupException { + return new LTSVRecordReader(context, fileWork.getPath(), dfs, columns, config); + } + + + @Override + public int getReaderOperatorType() { + // TODO Is it correct?? + return UserBitShared.CoreOperatorType.JSON_SUB_SCAN_VALUE; Review comment: It is used for Drill RPC. You can find more info about it here: https://github.com/paul-rogers/drill/wiki/RPC-Protocol In your case it is necessary for determining proper type of the reader for `EasySubScan` operator, once the last is transferred to some Drill fragment. ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org With regards, Apache Git Services
