/*
 * Licensed to Metamarkets Group Inc. (Metamarkets) under one
 * or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. Metamarkets 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 io.druid.segment.realtime.firehose;

import com.fasterxml.jackson.annotation.JsonCreator;
import com.fasterxml.jackson.annotation.JsonProperty;
import com.google.common.base.Throwables;
import com.google.common.collect.Lists;
import com.metamx.common.ISE;
import com.metamx.emitter.EmittingLogger;
import io.druid.data.input.Firehose;
import io.druid.data.input.FirehoseFactory;
import io.druid.data.input.impl.FileIteratingFirehose;
import io.druid.data.input.impl.StringInputRowParser;
import org.apache.commons.io.FileUtils;
import org.apache.commons.io.LineIterator;
import org.apache.commons.io.filefilter.TrueFileFilter;
import org.apache.commons.io.filefilter.WildcardFileFilter;

import java.io.File;
import java.io.IOException;
import java.util.Collection;
import java.util.Iterator;
import java.util.LinkedList;

/**
 */
public class LocalFirehoseFactory implements FirehoseFactory<StringInputRowParser>
{
  private static final EmittingLogger log = new EmittingLogger(LocalFirehoseFactory.class);

  private final File baseDir;
  private final String filter;
  private final StringInputRowParser parser;

  @JsonCreator
  public LocalFirehoseFactory(
      @JsonProperty("baseDir") File baseDir,
      @JsonProperty("filter") String filter,
      // Backwards compatible
      @JsonProperty("parser") StringInputRowParser parser
  )
  {
    this.baseDir = baseDir;
    this.filter = filter;
    this.parser = parser;
  }

  @JsonProperty
  public File getBaseDir()
  {
    return baseDir;
  }

  @JsonProperty
  public String getFilter()
  {
    return filter;
  }

  @JsonProperty
  public StringInputRowParser getParser()
  {
    return parser;
  }

  @Override
  public Firehose connect(StringInputRowParser firehoseParser) throws IOException
  {
    log.info("Searching for all [%s] in and beneath [%s]", filter, baseDir.getAbsoluteFile());

    Collection<File> foundFiles = FileUtils.listFiles(
        baseDir.getAbsoluteFile(),
        new WildcardFileFilter(filter),
        TrueFileFilter.INSTANCE
    );

    if (foundFiles == null || foundFiles.isEmpty()) {
      throw new ISE("Found no files to ingest! Check your schema.");
    }
    log.info ("Found files: " + foundFiles);

    final LinkedList<File> files = Lists.newLinkedList(
        foundFiles
    );

    return new FileIteratingFirehose(
        new Iterator<LineIterator>()
        {
          @Override
          public boolean hasNext()
          {
            return !files.isEmpty();
          }

          @Override
          public LineIterator next()
          {
            try {
              return FileUtils.lineIterator(files.poll());
            }
            catch (Exception e) {
              throw Throwables.propagate(e);
            }
          }

          @Override
          public void remove()
          {
            throw new UnsupportedOperationException();
          }
        },
        firehoseParser
    );
  }
}

@@ -1034,16 +1034,46 @@
 .Lists;%0A
+import com.metamx.common.IAE;%0A
 import c
@@ -2595,24 +2595,97 @@
 ception%0A  %7B%0A
+    if (baseDir == null) %7B%0A      throw new IAE(%22baseDir is null%22);%0A    %7D%0A
     log.info

throw IAE when baseDir is null in LocalFireHose