content: /*
   * 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.asterix.external.input.record.reader.stream;
  
  import java.io.IOException;
  import java.util.Map;
  
  import org.apache.asterix.external.api.AsterixInputStream;
  import org.apache.asterix.external.api.IRawRecord;
  import org.apache.asterix.external.api.IStreamNotificationHandler;
  import org.apache.asterix.external.dataflow.AbstractFeedDataFlowController;
  import org.apache.asterix.external.input.record.CharArrayRecord;
  import org.apache.asterix.external.input.stream.AsterixInputStreamReader;
  import org.apache.asterix.external.util.ExternalDataUtils;
  import org.apache.asterix.external.util.IFeedLogManager;
  import org.apache.hyracks.api.exceptions.HyracksDataException;
  
  public abstract class StreamRecordReader extends AbstractStreamRecordReader<char[]>
          implements IStreamNotificationHandler {
      protected AsterixInputStreamReader reader;
      protected CharArrayRecord record;
      protected char[] inputBuffer;
      protected int bufferLength = 0;
      protected int bufferPosn = 0;
      protected boolean done = false;
      protected IFeedLogManager feedLogManager;
  
      protected void configure(AsterixInputStream inputStream, Map<String, String> config) {
          int bufferSize = ExternalDataUtils.getOrDefaultBufferSize(config);
          this.reader = new AsterixInputStreamReader(inputStream, bufferSize);
          record = new CharArrayRecord();
          inputBuffer = new char[bufferSize];
          setSuppliers(config, reader::getStreamName, reader::getPreviousStreamName);
      }
  
      @Override
      public IRawRecord<char[]> next() throws IOException {
          return record;
      }
  
      @Override
      public void close() throws IOException {
          try {
              if (!done) {
                  reader.close();
              }
          } finally {
              done = true;
          }
      }
  
      @Override
      public boolean stop() {
          try {
              reader.stop();
              return true;
          } catch (Exception e) {
              e.printStackTrace();
              return false;
          }
      }
  
      @Override
      public void setFeedLogManager(IFeedLogManager feedLogManager) throws HyracksDataException {
          this.feedLogManager = feedLogManager;
          reader.setFeedLogManager(feedLogManager);
      }
  
      @Override
      public void setController(AbstractFeedDataFlowController controller) {
          reader.setController(controller);
      }
  
      @Override
      public boolean handleException(Throwable th) {
          return reader.handleException(th);
      }
  
      @Override
      public void notifyNewSource() {
          throw new UnsupportedOperationException();
      }
  
      protected void resetForNewSource() {
          record.reset();
      }
  
      public abstract String getRequiredConfigs();
  }