/*
 * 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.gobblin.task;

import java.io.IOException;
import java.util.Collections;
import java.util.List;

import org.apache.gobblin.configuration.SourceState;
import org.apache.gobblin.configuration.State;
import org.apache.gobblin.configuration.WorkUnitState;
import org.apache.gobblin.publisher.DataPublisher;
import org.apache.gobblin.runtime.JobState;
import org.apache.gobblin.runtime.TaskContext;
import org.apache.gobblin.runtime.task.TaskFactory;
import org.apache.gobblin.runtime.task.TaskIFace;
import org.apache.gobblin.runtime.task.TaskUtils;
import org.apache.gobblin.source.extractor.Extractor;
import org.apache.gobblin.source.workunit.WorkUnit;


public class FailsWithExceptionTaskFactory implements TaskFactory {
  @Override
  public TaskIFace createTask(TaskContext taskContext) {
    return new AlwaysThrowsTask();
  }

  @Override
  public DataPublisher createDataPublisher(JobState.DatasetState datasetState) {
    return null;
  }

  public static class Source implements org.apache.gobblin.source.Source<String, String> {
    @Override
    public List<WorkUnit> getWorkunits(SourceState state) {
      WorkUnit wu = new WorkUnit();
      TaskUtils.setTaskFactoryClass(wu, FailsWithExceptionTaskFactory.class);
      return Collections.singletonList(wu);
    }

    @Override
    public Extractor<String, String> getExtractor(WorkUnitState state)
        throws IOException {
      return null;
    }

    @Override
    public void shutdown(SourceState state) {

    }
  }
  private static class AlwaysThrowsTask implements TaskIFace {
    @Override
    public void run() {
      throw new IllegalArgumentException("I always fail with an exception!");
    }

    @Override
    public void commit() {

    }

    @Override
    public State getPersistentState() {
      return null;
    }

    @Override
    public State getExecutionMetadata() {
      return null;
    }

    @Override
    public WorkUnitState.WorkingState getWorkingState() {
      return null;
    }

    @Override
    public void shutdown() {

    }

    @Override
    public boolean awaitShutdown(long timeoutMillis)
        throws InterruptedException {
      return false;
    }

    @Override
    public String getProgress() {
      return null;
    }

    @Override
    public boolean isSpeculativeExecutionSafe() {
      return false;
    }
  }
}
