TokenBasedFileInputStreamExtractor.java

/*
 * 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 gobblin.source.extractor.filebased;

import com.google.common.base.Preconditions;

import gobblin.configuration.ConfigurationKeys;
import gobblin.configuration.WorkUnitState;
import gobblin.source.extractor.filebased.FileBasedExtractor;
import gobblin.source.extractor.filebased.FileBasedHelper;

import lombok.extern.slf4j.Slf4j;


/**
 * Extends {@link FileBasedExtractor} and uses {@link TokenizedFileDownloader}.
 */
public class TokenBasedFileInputStreamExtractor extends FileBasedExtractor<String, String> {

  public static final String TOKEN =
      "gobblin.extractor." + TokenBasedFileInputStreamExtractor.class.getSimpleName() + ".token";

  public static final String CHARSET =
      "gobblin.extractor." + TokenBasedFileInputStreamExtractor.class.getSimpleName() + ".charSet";

  private final String token;
  private final String charSet;

  public TokenBasedFileInputStreamExtractor(WorkUnitState workUnitState, FileBasedHelper fsHelper) {
    super(workUnitState, fsHelper);
    Preconditions.checkArgument(this.fileDownloader instanceof TokenizedFileDownloader);
    this.token = workUnitState.getProp(TOKEN, TokenizedFileDownloader.DEFAULT_TOKEN);
    this.charSet = workUnitState.getProp(CHARSET, ConfigurationKeys.DEFAULT_CHARSET_ENCODING.name());
    ((TokenizedFileDownloader) fileDownloader).setToken(token);
    ((TokenizedFileDownloader) fileDownloader).setCharset(charSet);
  }
}