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From paul-rogers <...@git.apache.org>
Subject [GitHub] drill pull request #831: DRILL-5432: Added pcap-format support
Date Fri, 26 May 2017 01:44:17 GMT
Github user paul-rogers commented on a diff in the pull request:

    https://github.com/apache/drill/pull/831#discussion_r118615528
  
    --- Diff: exec/java-exec/src/main/java/org/apache/drill/exec/store/pcap/PcapFormatPlugin.java
---
    @@ -0,0 +1,115 @@
    +/*
    + * 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
    + * <p>
    + * http://www.apache.org/licenses/LICENSE-2.0
    + * <p>
    + * 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.pcap;
    +
    +import com.google.common.collect.ImmutableList;
    +import com.google.common.collect.Lists;
    +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.planner.logical.DrillTable;
    +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.BasicFormatMatcher;
    +import org.apache.drill.exec.store.dfs.DrillFileSystem;
    +import org.apache.drill.exec.store.dfs.FileSelection;
    +import org.apache.drill.exec.store.dfs.FileSystemPlugin;
    +import org.apache.drill.exec.store.dfs.FormatMatcher;
    +import org.apache.drill.exec.store.dfs.FormatSelection;
    +import org.apache.drill.exec.store.dfs.MagicString;
    +import org.apache.drill.exec.store.dfs.NamedFormatPluginConfig;
    +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 org.apache.hadoop.fs.Path;
    +
    +import java.io.IOException;
    +import java.util.List;
    +import java.util.regex.Pattern;
    +
    +public class PcapFormatPlugin extends EasyFormatPlugin<PcapFormatConfig> {
    +
    +  private final PcapFormatMatcher matcher;
    +
    +  public PcapFormatPlugin(String name, DrillbitContext context, Configuration fsConf,
    +                          StoragePluginConfig storagePluginConfig) {
    +    this(name, context, fsConf, storagePluginConfig, new PcapFormatConfig());
    +  }
    +
    +  public PcapFormatPlugin(String name, DrillbitContext context, Configuration fsConf,
StoragePluginConfig config, PcapFormatConfig formatPluginConfig) {
    +    super(name, context, fsConf, config, formatPluginConfig, true, false, true, false,
Lists.newArrayList("pcap"), "pcap");
    +    this.matcher = new PcapFormatMatcher(this);
    +  }
    +
    +  @Override
    +  public boolean supportsPushDown() {
    +    return true;
    +  }
    +
    +  @Override
    +  public RecordReader getRecordReader(FragmentContext context, DrillFileSystem dfs, FileWork
fileWork, List<SchemaPath> columns, String userName) throws ExecutionSetupException
{
    +    String path = dfs.makeQualified(new Path(fileWork.getPath())).toUri().getPath();
    +    return new PcapRecordReader(path, columns);
    +  }
    +
    +  @Override
    +  public RecordWriter getRecordWriter(FragmentContext context, EasyWriter writer) throws
IOException {
    +    return null;
    +  }
    +
    +  @Override
    +  public int getReaderOperatorType() {
    +    return 0;
    +  }
    +
    +  @Override
    +  public int getWriterOperatorType() {
    +    return 0;
    --- End diff --
    
    Other format plugins do the following when a writer is not supported:
    
    ```
        throw new UnsupportedOperationException("unimplemented");
    ```


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