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.library.adapter;
  
  import java.io.IOException;
  import java.io.OutputStream;
  import java.io.PipedInputStream;
  import java.io.PipedOutputStream;
  import java.util.Map;
  import java.util.concurrent.ExecutorService;
  import java.util.concurrent.Executors;
  
  import org.apache.asterix.common.exceptions.ErrorCode;
  import org.apache.asterix.common.exceptions.RuntimeDataException;
  import org.apache.asterix.external.dataset.adapter.FeedAdapter;
  import org.apache.asterix.om.types.ARecordType;
  import org.apache.asterix.om.types.IAType;
  import org.apache.hyracks.api.comm.IFrameWriter;
  import org.apache.hyracks.api.context.IHyracksTaskContext;
  import org.apache.hyracks.api.exceptions.HyracksDataException;
  import org.apache.hyracks.dataflow.std.file.ITupleParser;
  import org.apache.hyracks.dataflow.std.file.ITupleParserFactory;
  import org.apache.hyracks.storage.am.common.api.ITupleFilter;
  import org.apache.logging.log4j.LogManager;
  import org.apache.logging.log4j.Logger;
  
  public class TestTypedAdapter extends FeedAdapter {
  
      private final PipedOutputStream pos;
  
      private final PipedInputStream pis;
  
      private final Map<String, String> configuration;
  
      private DummyGenerator generator;
  
      protected final ITupleParser tupleParser;
  
      protected final IAType sourceDatatype;
  
      protected static final Logger LOGGER = LogManager.getLogger();
  
      public TestTypedAdapter(ITupleParserFactory parserFactory, ARecordType sourceDatatype, IHyracksTaskContext ctx,
              Map<String, String> configuration, int partition) throws IOException {
          super(new TestTypedFeedDataFlowController(ctx));
          pos = new PipedOutputStream();
          pis = new PipedInputStream(pos);
          this.configuration = configuration;
          this.tupleParser = parserFactory.createTupleParser(ctx);
          this.sourceDatatype = sourceDatatype;
      }
  
      @Override
      public void start(int partition, IFrameWriter writer, ITupleFilter tupleFilter, long outputLimit)
              throws HyracksDataException {
          if (tupleFilter != null || outputLimit >= 0) {
              throw new RuntimeDataException(ErrorCode.DATAFLOW_ILLEGAL_STATE);
          }
  
          generator = new DummyGenerator(configuration, pos);
          ExecutorService executor = Executors.newSingleThreadExecutor();
          executor.execute(generator);
          if (pis != null) {
              tupleParser.parse(pis, writer);
          } else {
          }
          if (LOGGER.isWarnEnabled()) {
              LOGGER.warn("Could not obtain input stream for parsing from adapter " + this + "[" + partition + "]");
          }
      }
  
      private static class DummyGenerator implements Runnable {
  
          private final int nOutputRecords;
          private final OutputStream os;
          private final byte[] EOL = "\n".getBytes();
          private boolean continueIngestion;
  
          public DummyGenerator(Map<String, String> configuration, OutputStream os) {
              nOutputRecords = Integer.parseInt(configuration.get(TestTypedAdapterFactory.KEY_NUM_OUTPUT_RECORDS));
              this.os = os;
              this.continueIngestion = true;
          }
  
          @Override
          public void run() {
              DummyRecord dummyRecord = new DummyRecord();
              try {
                  int i = 0;
                  while (continueIngestion && i < nOutputRecords) {
                      dummyRecord.reset(i + 1, "" + (i + 1));
                      os.write(dummyRecord.toString().getBytes());
                      os.write(EOL);
                      i++;
                  }
              } catch (IOException ioe) {
                  ioe.printStackTrace();
              } finally {
                  try {
                      os.close();
                  } catch (Exception e) {
                      e.printStackTrace();
                  }
              }
          }
  
          public void stop() {
              continueIngestion = false;
          }
      }
  
      private static class DummyRecord {
  
          private int tweetid = 0;
          private String text = null;
  
          public void reset(int tweetid, String text) {
              this.tweetid = tweetid;
              this.text = text;
          }
  
          @Override
          public String toString() {
              return "{" + "\"tweetid\":" + "int64(" + "\"" + tweetid + "\"" + ")" + "," + "\"message-text\":" + "\""
                      + text + "\"" + "}";
          }
  
      }
  
      @Override
      public boolean stop(long timeout) {
          generator.stop();
          return true;
      }
  
      @Override
      public boolean pause() {
          return false;
      }
  
      @Override
      public boolean resume() {
          return false;
      }
  
  }
  