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.beam.sdk.loadtests;
  
  import static java.nio.charset.StandardCharsets.UTF_8;
  import static org.apache.beam.sdk.util.CoderUtils.encodeToByteArray;
  
  import java.io.IOException;
  import java.util.Arrays;
  import java.util.HashMap;
  import java.util.Map;
  import org.apache.beam.sdk.Pipeline;
  import org.apache.beam.sdk.coders.Coder;
  import org.apache.beam.sdk.coders.CoderException;
  import org.apache.beam.sdk.coders.StringUtf8Coder;
  import org.apache.beam.sdk.io.Read;
  import org.apache.beam.sdk.io.aws2.common.ClientConfiguration;
  import org.apache.beam.sdk.io.aws2.kinesis.KinesisIO;
  import org.apache.beam.sdk.io.gcp.pubsub.PubsubIO;
  import org.apache.beam.sdk.io.gcp.pubsub.PubsubMessage;
  import org.apache.beam.sdk.io.kafka.KafkaIO;
  import org.apache.beam.sdk.io.synthetic.SyntheticBoundedSource;
  import org.apache.beam.sdk.io.synthetic.SyntheticOptions;
  import org.apache.beam.sdk.io.synthetic.SyntheticSourceOptions;
  import org.apache.beam.sdk.options.ApplicationNameOptions;
  import org.apache.beam.sdk.options.Description;
  import org.apache.beam.sdk.options.PipelineOptions;
  import org.apache.beam.sdk.options.PipelineOptionsFactory;
  import org.apache.beam.sdk.options.Validation;
  import org.apache.beam.sdk.transforms.MapElements;
  import org.apache.beam.sdk.transforms.SimpleFunction;
  import org.apache.beam.sdk.values.KV;
  import org.apache.beam.sdk.values.PCollection;
  import org.apache.kafka.common.serialization.StringSerializer;
  import software.amazon.awssdk.auth.credentials.AwsBasicCredentials;
  import software.amazon.awssdk.auth.credentials.StaticCredentialsProvider;
  import software.amazon.awssdk.regions.Region;
  
  /**
   * Pipeline that generates synthetic data and publishes it in a PubSub or Kafka topic or in a
   * Kinesis stream.
   *
   * <p>To run it manually, use the following command:
   *
   * <pre>
   *  ./gradlew :sdks:java:testing:load-tests:run -PloadTest.args='
   *    --pubSubTopic=TOPIC_NAME
   *    --kafkaBootstrapServerAddress=SERVER_ADDRESS
   *    --kafkaTopic=KAFKA_TOPIC_NAME
   *    --sourceOptions={"numRecords":1000,...}
   *    --kinesisStreamName=KINESIS_STREAM_NAME
   *    --kinesisPartitionKey=KINESIS_PARTITION_KEY
   *    --kinesisAwsKey=KINESIS_AWS_KEY
   *    --kinesisAwsSecret=KINESIS_AWS_SECRET
   *    --kinesisAwsRegion=KINESIS_AWS_REGION'
   *    -PloadTest.mainClass="org.apache.beam.sdk.loadtests.SyntheticDataPublisher"
   *  </pre>
   *
   * <p>If parameters related to a specific sink are provided (Kafka, PubSub or Kinesis), the pipeline
   * writes to the sink. Writing to more than one sink is also acceptable.
   */
  @SuppressWarnings({
    "rawtypes", // TODO(https://github.com/apache/beam/issues/20447)
    "nullness" // TODO(https://github.com/apache/beam/issues/20497)
  })
  public class SyntheticDataPublisher {
  
    private static final Coder RECORD_CODER = StringUtf8Coder.of();
  
    private static Options options;
  
    /** Options for the pipeline. */
    public interface Options extends PipelineOptions, ApplicationNameOptions {
  
      @Description("Options for synthetic source")
      @Validation.Required
      String getSourceOptions();
  
      void setSourceOptions(String sourceOptions);
  
      @Description("PubSub topic to publish to")
      String getPubSubTopic();
  
      void setPubSubTopic(String topic);
  
      @Description("Kafka server address")
      String getKafkaBootstrapServerAddress();
  
      void setKafkaBootstrapServerAddress(String address);
  
      @Description("Kafka topic")
      String getKafkaTopic();
  
      void setKafkaTopic(String topic);
  
      @Description("Kinesis partition key")
      String getKinesisPartitionKey();
  
      void setKinesisPartitionKey(String partitionKey);
  
      @Description("Kinesis partition name")
      String getKinesisStreamName();
  
      void setKinesisStreamName(String kinesisStreamName);
  
      @Description("AWS secret for Kinesis")
      String getKinesisAwsSecret();
  
      void setKinesisAwsSecret(String kinesisAwsSecret);
  
      @Description("AWS key for Kinesis")
      String getKinesisAwsKey();
  
      void setKinesisAwsKey(String kinesisAwsKey);
  
      @Description("AWS region for Kinesis")
      String getKinesisAwsRegion();
  
      void setKinesisAwsRegion(String kinesisAwsRegion);
    }
  
    public static void main(String[] args) throws IOException {
      options = PipelineOptionsFactory.fromArgs(args).withValidation().as(Options.class);
  
      SyntheticSourceOptions sourceOptions =
          SyntheticOptions.fromJsonString(options.getSourceOptions(), SyntheticSourceOptions.class);
  
      Pipeline pipeline = Pipeline.create(options);
      PCollection<KV<byte[], byte[]>> syntheticData =
          pipeline.apply("Read synthetic data", Read.from(new SyntheticBoundedSource(sourceOptions)));
  
      if (options.getKafkaBootstrapServerAddress() != null && options.getKafkaTopic() != null) {
        writeToKafka(syntheticData);
      }
      if (options.getPubSubTopic() != null) {
        writeToPubSub(syntheticData);
      }
      if (allKinesisOptionsConfigured()) {
        writeToKinesis(syntheticData);
      }
      pipeline.run().waitUntilFinish();
    }
  
    private static boolean allKinesisOptionsConfigured() {
      return options.getKinesisAwsKey() != null
          && options.getKinesisAwsRegion() != null
          && options.getKinesisAwsSecret() != null
          && options.getKinesisPartitionKey() != null
          && options.getKinesisStreamName() != null;
    }
  
    private static void writeToPubSub(PCollection<KV<byte[], byte[]>> collection) {
      collection
          .apply("Map to PubSub messages", MapElements.via(new MapBytesToPubSubMessage()))
          .apply("Write to PubSub", PubsubIO.writeMessages().to(options.getPubSubTopic()));
    }
  
    private static void writeToKafka(PCollection<KV<byte[], byte[]>> collection) {
      collection
          .apply("Map to Kafka messages", MapElements.via(new MapKVToString()))
          .apply(
              "Write to Kafka",
              KafkaIO.<Void, String>write()
                  .withBootstrapServers(options.getKafkaBootstrapServerAddress())
                  .withTopic(options.getKafkaTopic())
                  .withValueSerializer(StringSerializer.class)
                  .values());
    }
  
    private static void writeToKinesis(PCollection<KV<byte[], byte[]>> collection) {
      AwsBasicCredentials creds =
          AwsBasicCredentials.create(options.getKinesisAwsKey(), options.getKinesisAwsSecret());
      StaticCredentialsProvider provider = StaticCredentialsProvider.create(creds);
      collection
          .apply("Map to byte array for Kinesis", MapElements.via(new MapKVToByteArray()))
          .apply(
              "Write to Kinesis",
              KinesisIO.<byte[]>write()
                  .withStreamName(options.getKinesisStreamName())
                  .withPartitioner(p -> options.getKinesisPartitionKey())
                  .withClientConfiguration(
                      ClientConfiguration.builder()
                          .credentialsProvider(provider)
                          .region(Region.of(options.getKinesisAwsRegion()))
                          .build()));
    }
  
    private static class MapKVToString extends SimpleFunction<KV<byte[], byte[]>, String> {
      @Override
      public String apply(KV<byte[], byte[]> input) {
        return String.format(
            "{%s,%s}", Arrays.toString(input.getKey()), Arrays.toString(input.getValue()));
      }
    }
  
    private static class MapKVToByteArray extends SimpleFunction<KV<byte[], byte[]>, byte[]> {
      @Override
      public byte[] apply(KV<byte[], byte[]> input) {
        return encodeInputElement(input);
      }
    }
  
    private static class MapBytesToPubSubMessage
        extends SimpleFunction<KV<byte[], byte[]>, PubsubMessage> {
      @Override
      public PubsubMessage apply(KV<byte[], byte[]> input) {
        return new PubsubMessage(encodeInputElement(input), encodeInputElementToMapOfStrings(input));
      }
    }
  
    private static byte[] encodeInputElement(KV<byte[], byte[]> input) {
      try {
        return encodeToByteArray(RECORD_CODER, new String(input.getValue(), UTF_8));
      } catch (CoderException e) {
        throw new RuntimeException(String.format("Couldn't encode element. Exception: %s", e));
      }
    }
  
    private static Map<String, String> encodeInputElementToMapOfStrings(KV<byte[], byte[]> input) {
      String key = new String(input.getKey(), UTF_8);
      String value = new String(input.getValue(), UTF_8);
      HashMap<String, String> map = new HashMap<>();
      map.put(key, value);
      return map;
    }
  }
  