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.
   */
  
  // beam-playground:
  //   name: adding-timestamp
  //   description: Adding timestamp example.
  //   multifile: false
  //   context_line: 47
  //   categories:
  //     - Quickstart
  //   complexity: ADVANCED
  //   tags:
  //     - hellobeam
  
  import org.apache.beam.sdk.Pipeline;
  import org.apache.beam.sdk.options.PipelineOptions;
  import org.apache.beam.sdk.options.PipelineOptionsFactory;
  import org.apache.beam.sdk.transforms.Create;
  import org.apache.beam.sdk.transforms.DoFn;
  import org.apache.beam.sdk.transforms.ParDo;
  import org.apache.beam.sdk.values.PCollection;
  import org.joda.time.DateTime;
  import java.io.Serializable;
  import java.util.Objects;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  public class Task {
  
      private static final Logger LOG = LoggerFactory.getLogger(Task.class);
  
      public static void main(String[] args) {
          PipelineOptions options = PipelineOptionsFactory.fromArgs(args).create();
          Pipeline pipeline = Pipeline.create(options);
  
          PCollection<Event> input =
                  pipeline.apply(
                          Create.of(
                                  new Event("1", "book-order", DateTime.parse("2019-06-01T00:00:00+00:00")),
                                  new Event("2", "pencil-order", DateTime.parse("2019-06-02T00:00:00+00:00")),
                                  new Event("3", "paper-order", DateTime.parse("2019-06-03T00:00:00+00:00")),
                                  new Event("4", "pencil-order", DateTime.parse("2019-06-04T00:00:00+00:00")),
                                  new Event("5", "book-order", DateTime.parse("2019-06-05T00:00:00+00:00"))
                          )
                  );
  
          PCollection<Event> output = applyTransform(input);
  
          output.apply("Log", ParDo.of(new LogOutput()));
  
          pipeline.run();
      }
  
      static PCollection<Event> applyTransform(PCollection<Event> events) {
          return events.apply(ParDo.of(new DoFn<Event, Event>() {
  
              @ProcessElement
              public void processElement(@Element Event event, OutputReceiver<Event> out) {
                  out.outputWithTimestamp(event, event.getDate().toInstant());
              }
  
          }));
      }
  
      static class LogOutput<T> extends DoFn<T, T> {
  
          private String prefix;
  
          LogOutput() {
              this.prefix = "Processing element";
          }
  
          LogOutput(String prefix) {
              this.prefix = prefix;
          }
  
          @ProcessElement
          public void processElement(ProcessContext c) throws Exception {
              LOG.info(prefix + ": {}", c.element());
          }
      }
  
  }
  
  public class Event implements Serializable {
  
      private String id;
      private String event;
      private DateTime date;
  
      public Event(String id, String event, DateTime date) {
          this.id = id;
          this.event = event;
          this.date = date;
      }
  
      public String getId() {
          return id;
      }
  
      public void setId(String id) {
          this.id = id;
      }
  
      public String getEvent() {
          return event;
      }
  
      public void setEvent(String event) {
          this.event = event;
      }
  
      public DateTime getDate() {
          return date;
      }
  
      public void setDate(DateTime date) {
          this.date = date;
      }
  
      @Override
      public boolean equals(Object o) {
          if (this == o) {
              return true;
          }
  
          if (o == null || getClass() != o.getClass()) {
              return false;
          }
  
          Event event1 = (Event) o;
  
          return id.equals(event1.id) &&
                  event.equals(event1.event) &&
                  date.equals(event1.date);
      }
  
      @Override
      public int hashCode() {
          return Objects.hash(id, event, date);
      }
  
      @Override
      public String toString() {
          return "Event{" +
                  "id='" + id + '\'' +
                  ", event='" + event + '\'' +
                  ", date=" + date +
                  '}';
      }
  
  }