| /* |
| * 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 java.util.logging.Level; |
| import java.util.logging.Logger; |
| |
| 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; |
| |
| public class TestTypedAdapter extends FeedAdapter { |
| |
| private static final long serialVersionUID = 1L; |
| |
| 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 = Logger.getLogger(TestTypedAdapter.class.getName()); |
| |
| public TestTypedAdapter(ITupleParserFactory parserFactory, ARecordType sourceDatatype, IHyracksTaskContext ctx, |
| Map<String, String> configuration, int partition) throws IOException { |
| super(null); |
| 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) throws HyracksDataException { |
| generator = new DummyGenerator(configuration, pos); |
| ExecutorService executor = Executors.newSingleThreadExecutor(); |
| executor.execute(generator); |
| if (pis != null) { |
| tupleParser.parse(pis, writer); |
| } else { |
| if (LOGGER.isLoggable(Level.WARNING)) { |
| LOGGER.warning( |
| "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() { |
| generator.stop(); |
| return true; |
| } |
| |
| @Override |
| public boolean handleException(Throwable e) { |
| return false; |
| } |
| |
| @Override |
| public boolean pause() { |
| return false; |
| } |
| |
| @Override |
| public boolean resume() { |
| return false; |
| } |
| } |