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.apex.examples.JdbcIngest;
  
  import java.util.List;
  
  import org.apache.apex.malhar.lib.db.jdbc.JdbcPOJOPollInputOperator;
  import org.apache.apex.malhar.lib.db.jdbc.JdbcStore;
  import org.apache.apex.malhar.lib.util.FieldInfo;
  import org.apache.apex.malhar.lib.util.FieldInfo.SupportType;
  import org.apache.hadoop.conf.Configuration;
  
  import com.google.common.collect.Lists;
  
  import com.datatorrent.api.Context.PortContext;
  import com.datatorrent.api.DAG;
  import com.datatorrent.api.StreamingApplication;
  import com.datatorrent.api.annotation.ApplicationAnnotation;
  
  @ApplicationAnnotation(name = "PollJdbcToHDFSApp")
  /**
   * @since 3.8.0
   */
  public class JdbcPollerApplication implements StreamingApplication
  {
    @Override
    public void populateDAG(DAG dag, Configuration conf)
    {
      JdbcPOJOPollInputOperator poller = dag.addOperator("JdbcPoller", new JdbcPOJOPollInputOperator());
  
      JdbcStore store = new JdbcStore();
      poller.setStore(store);
  
      poller.setFieldInfos(addFieldInfos());
  
      FileLineOutputOperator writer = dag.addOperator("Writer", new FileLineOutputOperator());
      dag.setInputPortAttribute(writer.input, PortContext.PARTITION_PARALLEL, true);
      writer.setRotationWindows(60);
  
      dag.addStream("dbrecords", poller.outputPort, writer.input);
    }
  
    /**
     * This method can be modified to have field mappings based on user defined
     * class
     */
    private List<FieldInfo> addFieldInfos()
    {
      List<FieldInfo> fieldInfos = Lists.newArrayList();
      fieldInfos.add(new FieldInfo("ACCOUNT_NO", "accountNumber", SupportType.INTEGER));
      fieldInfos.add(new FieldInfo("NAME", "name", SupportType.STRING));
      fieldInfos.add(new FieldInfo("AMOUNT", "amount", SupportType.INTEGER));
      return fieldInfos;
    }
  }
  